{"title":"Serial-to-USB Converters","description":"\u003cp\u003eKeep legacy RS232 serial equipment working with modern computers that have dropped serial ports entirely. Available in single-port and multi-port configurations, these USB adapters are a plug-and-play way to maintain compatibility with older instrumentation, POS systems, and industrial controllers.\u003c\/p\u003e","products":[{"product_id":"usb-to-rs-232-serial-male-adapter-converter-multi-1-usb-rs232","title":"Adaptador\/Convertidor USB a RS-232 DB9 Serie Multi-1\/USB RS232","description":"\u003cp\u003eSystemBase Multi-1\/USB RS232 le permite agregar fácil y rápidamente puertos seriales adicionales a su sistema a través del puerto USB. El Multi-1\/USB ofrece el máximo rendimiento hasta 921,6 Kbps. Combinado con la necesidad de menos componentes, obtiene conexiones rentables y confiables a sus dispositivos seriales.\u003c\/p\u003e\n\u003cp\u003eEl USB to Serial Multi-1 es compatible con la mayoría de los sistemas operativos Windows y Linux e incluye supresión de sobretensiones de 15 000 voltios, lo que elimina los puertos dañados. El Multi-1\/USB incluye un panel de 1 puerto con conector DB9 y está disponible en dos modelos, RS232 y RS422\/RS485. Simplemente conecte el conector USB y tendrá un puerto COM para conectar módems, impresoras, lectores de códigos de barras u otros dispositivos seriales.\u003c\/p\u003e\n\u003ch3\u003eCaracterísticas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdaptador\/convertidor de USB a 1 puerto serie DB9 (macho)\u003c\/li\u003e\n\u003cli\u003eLos pestillos del conector USB evitan que se desconecte accidentalmente\u003c\/li\u003e\n\u003cli\u003eAdmite USB Rev. 2.0 (velocidad máxima)\u003c\/li\u003e\n\u003cli\u003eVelocidad de comunicación: hasta 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eMostrar el estado de comunicación a través del LED TX\/RX\u003c\/li\u003e\n\u003cli\u003e±15kV Protección contra sobretensiones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePanel de conectores\u003c\/h3\u003e\n\u003cp\u003eEl Multi-1\/USB se conecta al puerto USB de su sistema. El panel de conectores tiene un conector macho DB9 y está disponible con soporte para RS232 o RS422\/RS485. Los LED junto al conector proporcionan un estado de comunicación visual de los puertos. No se requiere fuente de alimentación adicional.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAdmite la revisión de la especificación USB 2.0\u003c\/h3\u003e\n\u003cp\u003eEl Multi-1\/USB admite la revisión 2.0 y es compatible con la revisión 1.1\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProtección contra sobretensiones de 15 KV: incorporada\u003c\/h3\u003e\n\u003cp\u003eNo se arriesgue a puertos quemados y tiempo de inactividad. El Multi-1\/USB tiene una supresión de sobretensiones de 15 000 voltios incorporada para proteger contra picos eléctricos y puertos quemados, lo que le brinda comunicaciones más confiables.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eEspecificaciones\u003c\/h3\u003e\n\u003ch4\u003eTipo de interfaz\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEspecificación USB Rev. 2.0, máxima velocidad\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSerie\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaz: RS232\u003c\/li\u003e\n\u003cli\u003eNúmero de puertos: 1 DB9\u003c\/li\u003e\n\u003cli\u003eVelocidad máxima: 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eLíneas de señal RS-232: TXD, RXD, GND, RTS, CTS, DTR, DSR, DCD, RI\u003c\/li\u003e\n\u003cli\u003eProtección contra sobretensiones: 15KV\u003c\/li\u003e\n\u003cli\u003eControl de flujo: RTS\/CTS, XON\/XOFF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHardware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eControlador: FT232R\u003c\/li\u003e\n\u003cli\u003eConector: DE-09P (DB-9 macho)\u003c\/li\u003e\n\u003cli\u003eDimensiones (ancho x largo x alto): 39 x 49 x 16,3 mm (1,54 x 1,93 x 0,64 pulgadas)\u003c\/li\u003e\n\u003cli\u003ePeso: 40 g\/1,41 oz\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSoftware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSistema operativo compatible:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7\/8\/8.1\/10\u003c\/li\u003e\n\u003cli\u003eServidor de Windows 2008\/2012\u003c\/li\u003e\n\u003cli\u003eLinux\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eUtilidad: TestView\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEntorno operativo\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTemperatura de funcionamiento: 0 ~ 50 °C\u003c\/li\u003e\n\u003cli\u003eTemperatura de almacenamiento: -20 ~ 80 °C\u003c\/li\u003e\n\u003cli\u003eHumedad: 5 ~ 90 % sin condensación\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCertificaciones\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCertificaciones KC, FCC, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEl paquete incluye:\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e1X Multi-1\/USB RS232,\u003cbr\u003eGuía de descarga, Política de garantía\u003c\/p\u003e\n\u003ch3\u003eRecursos adicionales:\u003c\/h3\u003e\n\u003cp\u003e\u003ca title=\"Multi-1\/USB RS232 USB to RS-232 DB9 Serial Adapter\/Converter\" href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-1usb-rs232\/\" target=\"_blank\"\u003eMulti-1\/USB RS232 USB a RS-232 DB9 Serial Adapter\/Converter Manual, utilidades y descargas de especificaciones (sitio web de SystemBase)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":42081551155449,"sku":"Multi-1-USB-RS232","price":43.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs-232-db9-serial-adapterconverter-multi-1usb-rs232-336867.jpg?v=1637738940"},{"product_id":"usb-to-rs-422-rs-485-db9-serial-adapter-converter-multi-1-usb-combo","title":"Adaptador\/Convertidor Serie USB a RS-422\/RS-485 DB9 Multi-1\/USB COMBO","description":"\u003cp\u003eEl SystemBase Multi-1\/USB Combo le permite agregar fácil y rápidamente puertos seriales adicionales a su sistema a través del puerto USB. El Multi-1\/USB ofrece el máximo rendimiento hasta 921,6 Kbps. Combinado con la necesidad de menos componentes, obtiene conexiones rentables y confiables a sus dispositivos seriales.\u003c\/p\u003e\n\u003cp\u003eEl USB to Serial Multi-1 es compatible con la mayoría de los sistemas operativos Windows y Linux e incluye supresión de sobretensiones de 15 000 voltios, lo que elimina los puertos dañados. El Multi-1\/USB incluye un panel de 1 puerto con conector DB9 y está disponible en dos modelos, RS232 y RS422\/RS485. Simplemente conecte el conector USB y tendrá un puerto COM para conectar módems, impresoras, lectores de códigos de barras u otros dispositivos seriales.\u003c\/p\u003e\n\u003ch3\u003eCaracterísticas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConvertidor\/adaptador USB a 1 puerto serie DB9 (macho)\u003c\/li\u003e\n\u003cli\u003eInterfaz RS422\/RS485\u003c\/li\u003e\n\u003cli\u003eLos pestillos del conector USB evitan que se desconecte accidentalmente\u003c\/li\u003e\n\u003cli\u003eAdmite USB Rev. 2.0 (velocidad máxima)\u003c\/li\u003e\n\u003cli\u003eVelocidad de comunicación: hasta 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eMostrar el estado de comunicación a través del LED TX\/RX\u003c\/li\u003e\n\u003cli\u003e±15kV Protección contra sobretensiones\u003c\/li\u003e\n\u003cli\u003eAuto Togging: control automático de E\/S de BUS para RS422\/RS485\u003c\/li\u003e\n\u003cli\u003eControl de límite de velocidad de respuesta\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePanel de conectores\u003c\/h3\u003e\n\u003cp\u003eEl Multi-1\/USB se conecta al puerto USB de su sistema. El panel de conectores tiene un conector macho DB9 y está disponible con soporte para RS232 o RS422\/RS485. Los LED junto al conector proporcionan un estado de comunicación visual de los puertos. No se requiere fuente de alimentación adicional.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAdmite la revisión de la especificación USB 2.0\u003c\/h3\u003e\n\u003cp\u003eEl Multi-1\/USB admite la revisión 2.0 y es compatible con la revisión 1.1\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProtección contra sobretensiones de 15 KV: incorporada\u003c\/h3\u003e\n\u003cp\u003eNo se arriesgue a puertos quemados y tiempo de inactividad. El Multi-1\/USB tiene una supresión de sobretensiones de 15 000 voltios incorporada para proteger contra picos eléctricos y puertos quemados, lo que le brinda comunicaciones más confiables.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eEspecificaciones\u003c\/h3\u003e\n\u003ch4\u003eTipo de interfaz\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEspecificación USB Rev. 2.0, máxima velocidad\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSerie\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaz: RS422\/RS485 (combinado)\u003c\/li\u003e\n\u003cli\u003eNúmero de puertos: 1 DB9\u003c\/li\u003e\n\u003cli\u003eVelocidad máxima: 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eLíneas de señal:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eRS422: TXD+, TXD-, RXD+, RXD-\u003c\/li\u003e\n\u003cli\u003eRS485: TRXD+, TRXD-\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eProtección contra sobretensiones: 15KV\u003c\/li\u003e\n\u003cli\u003eControl de flujo: RTS\/CTS, XON\/XOFF\u003c\/li\u003e\n\u003cli\u003ePrevención de bloqueo de datos: cambio automático\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHardware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eControlador: FT232R\u003c\/li\u003e\n\u003cli\u003eConector: DE-09P (DB-9 macho)\u003c\/li\u003e\n\u003cli\u003eDimensiones (ancho x largo x alto): 39 x 49 x 16,3 mm (1,54 x 1,93 x 0,64 pulgadas)\u003c\/li\u003e\n\u003cli\u003ePeso: 40 g\/1,41 oz\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSoftware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSistema operativo compatible:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7\/8\/8.1\/10\u003c\/li\u003e\n\u003cli\u003eServidor de Windows 2008\/2012\u003c\/li\u003e\n\u003cli\u003eLinux\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eUtilidad: TestView\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEntorno operativo\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTemperatura de funcionamiento: 0 ~ 50 °C\u003c\/li\u003e\n\u003cli\u003eTemperatura de almacenamiento: -20 ~ 80 °C\u003c\/li\u003e\n\u003cli\u003eHumedad: 5 ~ 90 % sin condensación\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCertificaciones\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCertificaciones KC, FCC, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEl paquete incluye:\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e1X Multi-1\/USB COMBO,\u003cbr\u003eGuía de descarga, Política de garantía\u003c\/p\u003e\n\u003ch3\u003eRecursos adicionales:\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-1usb-combo\/\" title=\"Multi-1\/USB COMBO USB to RS-422 \/ RS-485 DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003eMulti-1\/USB COMBO USB to RS-422\/RS-485 DB9 Serial Adapter\/Converter Manual, utilidades y descargas de especificaciones (sitio web de SystemBase)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":42081590444281,"sku":"Multi-1-USB-COMBO","price":74.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs-422rs-485-db9-serial-adapterconverter-multi-1usb-combo-744991.jpg?v=1637738940"},{"product_id":"usb-to-rs-232-2-port-db9-serial-adapter-converter-multi-2-usb-rs232","title":"Adaptador\/Convertidor USB a RS-232 Serie DB9 de 2 puertos Multi-2\/USB RS232","description":"\u003cp\u003eSystemBase Multi-2\/USB RS232 le permite agregar fácil y rápidamente dos puertos seriales adicionales a su sistema a través del puerto USB. El Multi-2\/USB ofrece el máximo rendimiento hasta 921,6 Kbps. Combinado con la necesidad de menos componentes, obtiene conexiones rentables y confiables a sus dispositivos seriales.\u003c\/p\u003e\n\u003cp\u003eEl USB to Serial Multi-2 es compatible con la mayoría de los sistemas operativos Windows y Linux e incluye supresión de sobretensiones de 15 000 voltios, lo que elimina los puertos dañados. El Multi-2\/USB incluye un panel de 2 puertos con un conector DB9 y está disponible en dos modelos, RS232 y RS422\/RS485. Simplemente conecte el conector USB y tendrá un puerto COM para conectar módems, impresoras, lectores de códigos de barras u otros dispositivos seriales.\u003c\/p\u003e\n\u003ch3\u003eCaracterísticas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConvertidor\/adaptador de USB a 2 puertos serie DB9 (macho)\u003c\/li\u003e\n\u003cli\u003eLos pestillos del conector USB evitan que se desconecte accidentalmente\u003c\/li\u003e\n\u003cli\u003eAdmite USB Rev. 2.0 (velocidad máxima)\u003c\/li\u003e\n\u003cli\u003eVelocidad de comunicación: hasta 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eMostrar el estado de comunicación a través del LED TX\/RX\u003c\/li\u003e\n\u003cli\u003e±15kV Protección contra sobretensiones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePanel de conectores\u003c\/h3\u003e\n\u003cp\u003eEl Multi-2\/USB se conecta al puerto USB de su sistema. El panel de conectores tiene dos conectores macho DB9 y está disponible con soporte para RS232 o RS422\/RS485. Los LED junto al conector proporcionan un estado de comunicación visual de los puertos. No se requiere fuente de alimentación adicional.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAdmite la revisión de la especificación USB 2.0\u003c\/h3\u003e\n\u003cp\u003eEl Multi-2\/USB admite la revisión 2.0 y es compatible con la revisión 1.1\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProtección contra sobretensiones de 15 KV: incorporada\u003c\/h3\u003e\n\u003cp\u003eNo se arriesgue a puertos quemados y tiempo de inactividad. El Multi-1\/USB tiene una supresión de sobretensiones de 15 000 voltios incorporada para proteger contra picos eléctricos y puertos quemados, lo que le brinda comunicaciones más confiables.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eEspecificaciones\u003c\/h3\u003e\n\u003ch4\u003eTipo de interfaz\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEspecificación USB Rev. 2.0, máxima velocidad\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSerie\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaz: RS232\u003c\/li\u003e\n\u003cli\u003eNúmero de puertos: 2 DB9\u003c\/li\u003e\n\u003cli\u003eVelocidad máxima: 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eLíneas de señal RS-232: TXD, RXD, GND, RTS, CTS, DTR, DSR, DCD, RI\u003c\/li\u003e\n\u003cli\u003eProtección contra sobretensiones: 15KV\u003c\/li\u003e\n\u003cli\u003eControl de flujo: RTS\/CTS, XON\/XOFF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHardware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eControlador: FT232R\u003c\/li\u003e\n\u003cli\u003eConector: DE-09P (DB-9 macho)\u003c\/li\u003e\n\u003cli\u003eDimensiones (ancho x largo x alto): 39 x 94 x 16,3 mm (1,54 x 3,7 x 0,64 pulgadas)\u003c\/li\u003e\n\u003cli\u003ePeso: 60 g\/2,12 oz\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSoftware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSistema operativo compatible:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7\/8\/8.1\/10\u003c\/li\u003e\n\u003cli\u003eServidor de Windows 2008\/2012\u003c\/li\u003e\n\u003cli\u003eLinux\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eUtilidad: TestView\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEntorno operativo\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTemperatura de funcionamiento: 0 ~ 50 °C\u003c\/li\u003e\n\u003cli\u003eTemperatura de almacenamiento: -20 ~ 80 °C\u003c\/li\u003e\n\u003cli\u003eHumedad: 5 ~ 90 % sin condensación\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCertificaciones\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCertificaciones KC, FCC, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEl paquete incluye:\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e1X Multi-2\/USB RS232,\u003cbr\u003eGuía de descarga, Política de garantía\u003c\/p\u003e\n\u003ch3\u003eRecursos adicionales:\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-2usb-rs232\/\" title=\"Multi-2\/USB RS232 USB to RS-232 2-Port DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003eMulti-2\/USB RS232 USB a RS-232 2-Port DB9 Serial Adapter\/Converter Manual, utilidades y descargas de especificaciones (sitio web de SystemBase)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":42081599881465,"sku":"Multi-2-USB-RS232","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs-232-2-port-db9-serial-adapterconverter-multi-2usb-rs232-765711.jpg?v=1637738940"},{"product_id":"usb-to-rs-422-485-2-port-db9-serial-adapter-converter-multi-2-usb-combo","title":"Adaptador\/Convertidor USB a RS-232 Serie DB9 de 2 puertos Multi-2\/USB RS232","description":"\u003cp\u003eSystemBase Multi-2\/USB RS232 le permite agregar fácil y rápidamente dos puertos seriales adicionales a su sistema a través del puerto USB. El Multi-2\/USB ofrece el máximo rendimiento hasta 921,6 Kbps. Combinado con la necesidad de menos componentes, obtiene conexiones rentables y confiables a sus dispositivos seriales.\u003c\/p\u003e\n\u003cp\u003eEl USB to Serial Multi-2 es compatible con la mayoría de los sistemas operativos Windows y Linux e incluye supresión de sobretensiones de 15 000 voltios, lo que elimina los puertos dañados. El Multi-2\/USB incluye un panel de 2 puertos con un conector DB9 y está disponible en dos modelos, RS232 y RS422\/RS485. Simplemente conecte el conector USB y tendrá un puerto COM para conectar módems, impresoras, lectores de códigos de barras u otros dispositivos seriales.\u003c\/p\u003e\n\u003ch3\u003eCaracterísticas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConvertidor\/adaptador de USB a 2 puertos serie DB9 (macho)\u003c\/li\u003e\n\u003cli\u003eLos pestillos del conector USB evitan que se desconecte accidentalmente\u003c\/li\u003e\n\u003cli\u003eAdmite USB Rev. 2.0 (velocidad máxima)\u003c\/li\u003e\n\u003cli\u003eVelocidad de comunicación: hasta 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eMostrar el estado de comunicación a través del LED TX\/RX\u003c\/li\u003e\n\u003cli\u003e±15kV Protección contra sobretensiones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePanel de conectores\u003c\/h3\u003e\n\u003cp\u003eEl Multi-2\/USB se conecta al puerto USB de su sistema. El panel de conectores tiene dos conectores macho DB9 y está disponible con soporte para RS232 o RS422\/RS485. Los LED junto al conector proporcionan un estado de comunicación visual de los puertos. No se requiere fuente de alimentación adicional.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAdmite la revisión de la especificación USB 2.0\u003c\/h3\u003e\n\u003cp\u003eEl Multi-2\/USB admite la revisión 2.0 y es compatible con la revisión 1.1\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProtección contra sobretensiones de 15 KV: incorporada\u003c\/h3\u003e\n\u003cp\u003eNo se arriesgue a puertos quemados y tiempo de inactividad. El Multi-1\/USB tiene una supresión de sobretensiones de 15 000 voltios incorporada para proteger contra picos eléctricos y puertos quemados, lo que le brinda comunicaciones más confiables.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eEspecificaciones\u003c\/h3\u003e\n\u003ch4\u003eTipo de interfaz\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEspecificación USB Rev. 2.0, máxima velocidad\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSerie\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaz: RS232\u003c\/li\u003e\n\u003cli\u003eNúmero de puertos: 2 DB9\u003c\/li\u003e\n\u003cli\u003eVelocidad máxima: 921,6 kbps\u003c\/li\u003e\n\u003cli\u003eLíneas de señal RS-232: TXD, RXD, GND, RTS, CTS, DTR, DSR, DCD, RI\u003c\/li\u003e\n\u003cli\u003eProtección contra sobretensiones: 15KV\u003c\/li\u003e\n\u003cli\u003eControl de flujo: RTS\/CTS, XON\/XOFF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHardware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eControlador: FT232R\u003c\/li\u003e\n\u003cli\u003eConector: DE-09P (DB-9 macho)\u003c\/li\u003e\n\u003cli\u003eDimensiones (ancho x largo x alto): 39 x 94 x 16,3 mm (1,54 x 3,7 x 0,64 pulgadas)\u003c\/li\u003e\n\u003cli\u003ePeso: 60 g\/2,12 oz\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSoftware\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSistema operativo compatible:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7\/8\/8.1\/10\u003c\/li\u003e\n\u003cli\u003eServidor de Windows 2008\/2012\u003c\/li\u003e\n\u003cli\u003eLinux\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eUtilidad: TestView\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEntorno operativo\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTemperatura de funcionamiento: 0 ~ 50 °C\u003c\/li\u003e\n\u003cli\u003eTemperatura de almacenamiento: -20 ~ 80 °C\u003c\/li\u003e\n\u003cli\u003eHumedad: 5 ~ 90 % sin condensación\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCertificaciones\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCertificaciones KC, FCC, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEl paquete incluye:\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e1X Multi-2\/USB RS232,\u003cbr\u003eGuía de descarga, Política de garantía\u003c\/p\u003e\n\u003ch3\u003eRecursos adicionales:\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-2usb-rs232\/\" title=\"Multi-2\/USB RS232 USB to RS-232 2-Port DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003eMulti-2\/USB RS232 USB a RS-232 2-Port DB9 Serial Adapter\/Converter Manual, utilidades y descargas de especificaciones (sitio web de SystemBase)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":43142793265401,"sku":"Multi-2-USB-COMBO","price":104.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs-422485-2-port-db9-serial-adapterconverter-systembase-multi-2usb-combo-414860.jpg?v=1660970443"},{"product_id":"usb-to-rs-232-4-port-db9-serial-adapter-converter-multi-4-usb-rs232","title":"SystemBase Multi-4\/USB RS232 — 4-Port USB to RS-232 Serial Adapter | Industrial-Grade Surge Protection","description":"\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003eFour Serial Devices. One USB Port. No Compromises.\u003c\/h3\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eWhen your workflow depends on multiple RS-232 serial devices — CNC machines, receipt printers, lab instruments, network consoles — a single-port adapter just doesn't cut it. And juggling multiple 2-port adapters means more USB ports consumed, more cables tangled, and more points of failure.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cspan class=\"font-semibold\"\u003eThe SystemBase Multi-4\/USB RS232 solves it cleanly.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ePlug one USB cable into any PC or laptop and instantly gain four independent RS-232 serial ports through standard DB9 connectors. Four COM ports, one connection, zero hassle. No opening the case, no expansion cards — just plug in and get to work.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🔧 Real-World Applications the Multi-4\/USB RS232 Solves\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eCNC \u0026amp; Machine Shop Operations\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Connect four CNC mills, lathes, or routers simultaneously for DNC file transfers, program uploads, and real-time machine monitoring — all from a single laptop on the shop floor.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003ePoint-of-Sale \u0026amp; Retail\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Run a complete POS station from one USB port: receipt printer, barcode scanner, cash drawer, and customer display — all four serial devices connected at once.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eLaboratory \u0026amp; Medical Instruments\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Collect data from multiple analytical balances, spectrometers, blood analyzers, or environmental sensors simultaneously, feeding everything into your LIMS or analysis software in real time.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eIT \u0026amp; Network Administration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Access serial consoles on four routers, switches, firewalls, or UPS systems at once — ideal for rack-level configuration, firmware updates, and emergency troubleshooting without swapping cables.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eIndustrial Automation \u0026amp; Process Control\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Interface with multiple PLCs, variable frequency drives, temperature controllers, and HMI panels from a single engineering workstation.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eShipping \u0026amp; Logistics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Connect industrial scales, label printers, dimensioning systems, and barcode scanners in a warehouse packing station — one adapter handles the entire workflow.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eBuilding Management \u0026amp; HVAC\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Program and diagnose multiple BMS controllers, thermostats, and energy management systems from a single service laptop during site visits.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eEducation \u0026amp; Training Labs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Equip lab workstations with four serial ports for students working with microcontrollers, embedded systems, and serial communication projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e💡 Why Professionals Choose the Multi-4\/USB RS232\u003c\/h3\u003e\n\u003cdiv class=\"my-4 w-full overflow-x-auto\"\u003e\n\u003ctable class=\"min-w-full table-auto border-collapse border-spacing-0\"\u003e\n\u003cthead class=\"border-b border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eBenefit\u003c\/th\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eWhat It Means for You\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003e4 Independent RS-232 Ports\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eRun four serial devices simultaneously from a single USB connection. No more daisy-chaining multiple adapters, fighting for USB ports, or swapping cables between devices.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003e±15kV Surge Protection\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eBuilt-in industrial-grade surge suppression on every port shields your equipment and PC from voltage spikes — no blown ports, no costly repairs. Essential for factory floors, server rooms, and field service work.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003e921.6 Kbps Communication Speed\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eFar beyond the standard 115.2 Kbps ceiling of most USB-to-serial adapters. Handles high-speed DNC transfers, rapid data acquisition, and demanding throughput — even with all four ports active simultaneously.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eFull RS-232 Signal Support\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eAll standard RS-232 handshaking signals (TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND) are supported on every port. Many cheap adapters skip these — this one doesn't. Full hardware flow control ensures compatibility with demanding legacy devices.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eLatching USB Connector\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eThe USB cable locks into place, preventing accidental disconnection in vibration-prone environments. No more mystery disconnects on the shop floor, in the server rack, or during critical data transfers.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eTX\/RX LED Indicators\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eInstantly verify data is flowing on each of the four ports — invaluable for troubleshooting connections and commissioning multi-device installations.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eUSB Bus-Powered\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eNo external power supply needed. The adapter draws power directly from your USB port, keeping your workspace clean and your setup completely portable for field service.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eCompact, External Design\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eNo need to open your PC or install expansion cards. Works with desktops, laptops, and industrial PCs — take it wherever the job is.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e📦 What's in the Box\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eMulti-4\/USB RS232 adapter unit with 4× DB9 male serial ports\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUSB cable with latching connector\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUser manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e⚙️ Technical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"my-4 w-full overflow-x-auto\"\u003e\n\u003ctable class=\"min-w-full table-auto border-collapse border-spacing-0\"\u003e\n\u003cthead class=\"border-b border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSerial Interface\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eRS-232\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eNumber of Ports\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e4\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eConnector Type\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eDB9 Male\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eUSB Standard\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eUSB 2.0 (Full Speed)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eMax Baud Rate\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e921.6 Kbps\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSurge Protection\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e±15kV (ESD)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eRS-232 Signals\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eTxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eLED Indicators\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eTX\/RX per port\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eUSB Connection\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eLatching connector (prevents accidental disconnect)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003ePower\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eUSB bus-powered (no external adapter required)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eOS Support\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eWindows \u0026amp; Linux\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eManufacturer\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eSystemBase (South Korea)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🛡️ Buy with Confidence\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eAuthorized US Distributor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Envistia Mall is an authorized SystemBase distributor. You're getting genuine product with full manufacturer support.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eShips from the USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Fast domestic shipping, no international customs delays.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eTechnical Support\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Need help with installation, driver setup, or wiring? Our support team is here to help.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Can I use all four ports at the same time?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes. Each port operates as an independent COM port with its own dedicated channel. You can run four different serial devices simultaneously at full speed without any performance degradation.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Will this work with my laptop?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Absolutely. Any PC, laptop, or industrial computer with an available USB port can use this adapter — no internal expansion slots needed. It's USB bus-powered, so there's nothing else to plug in. Perfect for field technicians and service engineers.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Do I need to install drivers?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes, a simple driver installation is required. Drivers are included on CD and are also available for download. The adapter supports most Windows and Linux operating systems.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Does this support hardware flow control (RTS\/CTS)?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes. The Multi-4\/USB RS232 supports all standard RS-232 handshaking signals including RTS, CTS, DTR, DSR, DCD, and RI on every port — ensuring compatibility with devices that require hardware flow control.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How is this different from the 2-port Multi-2\/USB RS232?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Same industrial-grade quality, same features — doubled capacity. The Multi-4\/USB RS232 gives you four RS-232 ports instead of two, making it the right choice when you need to manage more serial devices from a single workstation. If two ports are enough, the Multi-2\/USB RS232 is a more compact and cost-effective option.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How is this different from the Multi-4\/USB COMBO?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: The RS232 model provides four dedicated RS-232 ports, which is the most common serial standard for point-to-point device connections (printers, scanners, instruments, console ports). The COMBO model provides RS-422\/RS-485 ports instead, which are used for longer-distance, multi-drop industrial networks. Choose the RS232 if your devices have standard DB9 serial ports and use RS-232 protocol.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How does the surge protection work?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: The adapter includes built-in ±15kV surge suppression on all serial lines across all four ports, protecting both the adapter and your connected PC from electrostatic discharge and voltage transients common in industrial and commercial settings.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: I need more than 4 serial ports. What are my options?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: SystemBase offers 8-port USB-to-serial adapters in both RS-232 and RS-422\/485 configurations for even larger installations. Check our full SystemBase product line for the right fit.\u003c\/p\u003e\n\u003ch3\u003eAdditional Resources\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-4usb-rs232\/\" title=\"Multi-4\/USB RS232 USB to RS-232 4-Port DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003eMulti-4\/USB RS232 USB to RS-232 4-Port DB9 Serial Adapter\/Converter Manual, Utilities and Specifications Downloads (SystemBase Website\u003c\/a\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-2usb-rs232\/\" title=\"Multi-2\/USB RS232 USB to RS-232 2-Port DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003e)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":44412615065849,"sku":"Multi-4-USB-RS232","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs-232-4-port-db9-serial-adapterconverter-multi-4usb-rs232-229874.jpg?v=1707417374"},{"product_id":"usb-to-rs422-485-4-port-db9-serial-adapter-converter-multi-4-usb-combo","title":"SystemBase Multi-4\/USB COMBO 4-Port USB to RS-422\/485 Serial Adapter | Industrial-Grade Surge Protection","description":"\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003eRunning a Multi-Device RS-422\/485 Network? Four Ports. One USB Connection. Zero Hassle.\u003c\/h3\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eIndustrial facilities, building automation systems, and data acquisition networks don't run on one or two serial devices — they run on dozens. PLCs, sensors, meters, and controllers spread across a factory floor or throughout a building all need to talk to a central PC. But modern computers don't come with serial ports, and two ports often aren't enough.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cspan class=\"font-semibold\"\u003eThe SystemBase Multi-4\/USB COMBO gives you four independent RS-422\/RS-485 serial ports from a single USB connection.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ePlug it in, install the drivers, and you're managing four separate serial channels — each independently configurable for RS-422 or RS-485. No expansion cards, no multiple adapters cluttering your desk, no compromises.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🔧 Real-World Applications the Multi-4\/USB COMBO Solves\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eIndustrial Automation \u0026amp; SCADA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Connect four PLCs, motor controllers, or HMI panels simultaneously for centralized programming, monitoring, and SCADA data collection over RS-485 multi-drop networks.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eBuilding Management \u0026amp; HVAC\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Interface with multiple BACnet MS\/TP controllers, lighting systems, energy meters, and zone controllers from a single workstation — each on its own dedicated serial channel.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eMulti-Drop Sensor Networks\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Manage up to 32 devices per port on RS-485 buses — that's up to 128 addressable devices from one adapter. Ideal for distributed temperature sensors, flow meters, and environmental monitoring arrays.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eEnergy \u0026amp; Utility Metering\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Poll multiple smart meters, power analyzers, and substation equipment simultaneously without swapping cables or juggling adapters.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eSecurity \u0026amp; Access Control\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Integrate card readers, door controllers, alarm panels, and CCTV serial interfaces into a unified management platform — four zones, four ports, one PC.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eTelecommunications \u0026amp; Network Infrastructure\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Configure and manage multiple pieces of legacy network equipment, modems, and telecom gear through dedicated serial console connections.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eTest \u0026amp; Measurement Labs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Run four instruments at once — oscilloscopes, signal generators, power supplies, and data loggers — all feeding data into your analysis software simultaneously.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eWater\/Wastewater \u0026amp; Process Control\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e— Monitor and control pumps, valves, chemical dosing systems, and level sensors across multiple RS-485 loops from a single operator station.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e💡 Why Professionals Choose the Multi-4\/USB COMBO\u003c\/h3\u003e\n\u003cdiv class=\"my-4 w-full overflow-x-auto\"\u003e\n\u003ctable class=\"min-w-full table-auto border-collapse border-spacing-0\"\u003e\n\u003cthead class=\"border-b border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eBenefit\u003c\/th\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eWhat It Means for You\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003e4 Independent Serial Ports\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eManage four separate RS-422\/485 channels from one USB connection. No more daisy-chaining multiple 2-port adapters or fighting for USB ports on your PC.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003e±15kV Surge Protection\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eBuilt-in industrial-grade surge suppression on every port protects your equipment and PC from voltage spikes — no blown ports, no costly repairs. Critical for factory floors, outdoor installations, and electrically noisy environments.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003e921.6 Kbps Communication Speed\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eBlazing-fast serial throughput on every port handles high-speed data acquisition and real-time control applications without bottlenecks — even when all four ports are active.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSwitchable RS-422 \/ RS-485 Per Port\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eOne adapter, two protocols, four ports. Select RS-422 (full-duplex, point-to-point) or RS-485 (half-duplex, multi-drop) independently on each port — maximum flexibility from a single device.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eAuto Toggling (Bus I\/O Control)\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eAutomatic transmit\/receive direction switching for RS-485 eliminates the need for manual RTS\/CTS flow control coding — just plug in and communicate. Saves development time and reduces integration headaches.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eLatching USB Connector\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eThe USB cable locks into place, preventing accidental disconnection in vibration-prone industrial environments. No more mystery disconnects on the shop floor.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eTX\/RX LED Indicators\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eInstantly verify data is flowing on each of the four ports — invaluable for troubleshooting and commissioning multi-device installations.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSlew-Rate Limiting\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eReduces electromagnetic interference (EMI) for cleaner signals in electrically noisy environments like manufacturing plants, substations, and data centers.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eCompact, External Design\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eNo need to open your PC or install expansion cards. Works with desktops, laptops, and industrial PCs — take it wherever the job is.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e📦 What's in the Box\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eMulti-4\/USB COMBO adapter unit with 4× DB9 male serial ports\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUSB cable with latching connector\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUser manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e⚙️ Technical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"my-4 w-full overflow-x-auto\"\u003e\n\u003ctable class=\"min-w-full table-auto border-collapse border-spacing-0\"\u003e\n\u003cthead class=\"border-b border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"px-4 py-2 text-left text-sm font-semibold whitespace-nowrap min-w-[100px]\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSerial Interface\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eRS-422 \/ RS-485 (selectable per port)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eNumber of Ports\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e4\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eConnector Type\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eDB9 Male\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eUSB Standard\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eUSB 2.0 (Full Speed)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eMax Baud Rate\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e921.6 Kbps\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSurge Protection\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e±15kV (ESD)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eBus Control\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eAuto Toggling (automatic RS-485 direction control)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eSignal Control\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eSlew-rate limiting for reduced EMI\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eLED Indicators\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eTX\/RX per port\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eUSB Connection\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eLatching connector (prevents accidental disconnect)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eOS Support\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eWindows \u0026amp; Linux\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003e\u003cspan class=\"font-semibold\"\u003eManufacturer\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"px-4 py-3 text-sm align-top min-w-[100px] max-w-[600px]\"\u003e\n\u003cdiv class=\"break-words overflow-wrap-anywhere\"\u003eSystemBase (South Korea)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🛡️ Buy with Confidence\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eAuthorized US Distributor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Envistia Mall is an authorized SystemBase distributor. You're getting genuine product with full manufacturer support.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eShips from the USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Fast domestic shipping, no international customs delays.\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eTechnical Support\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Need help with installation, driver setup, or wiring? Our support team is here to help.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Can I set each port to a different protocol — some RS-422 and some RS-485?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes! Each of the four ports can be independently configured for either RS-422 or RS-485 mode. You could run two ports as RS-422 for point-to-point connections and two as RS-485 for multi-drop networks — all from the same adapter.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How many devices can I connect total?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Each RS-485 port supports up to 32 devices on a multi-drop bus. With four ports, you can theoretically address up to 128 RS-485 devices from a single adapter. RS-422 ports support one device each in point-to-point mode.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Do I need to install drivers?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes, a simple driver installation is required. Drivers are included on CD and are also available for download. The adapter supports most Windows and Linux operating systems.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Will this work with my laptop?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Absolutely. Any PC, laptop, or industrial computer with an available USB port can use this adapter — no internal expansion slots needed.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: What does \"Auto Toggling\" mean?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: In RS-485 half-duplex mode, the adapter automatically switches between transmit and receive — you don't need to write custom code to control the data direction. This simplifies integration and reduces development time.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How is this different from the 2-port Multi-2\/USB COMBO?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Same industrial-grade quality, same features — just doubled capacity. The Multi-4\/USB COMBO gives you four RS-422\/485 ports instead of two, making it the right choice when you need to manage more serial devices from a single workstation. If two ports are enough, the Multi-2\/USB COMBO is a more compact and cost-effective option.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: How does the surge protection work?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: The adapter includes built-in ±15kV surge suppression on all serial lines across all four ports, protecting both the adapter and your connected PC from electrostatic discharge and voltage transients common in industrial settings.\u003c\/p\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eQ: Do you also carry a 4-port RS-232 version?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003e\u003c\/span\u003eA: Yes! The SystemBase Multi-4\/USB RS232 provides four RS-232 serial ports for point-to-point connections to devices like printers, scanners, instruments, and console ports. Check our full SystemBase product line for the right fit.\u003c\/p\u003e\n\u003ch3\u003eAdditional Resources:\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-4usb-combo\/\" title=\"Multi-4\/USB COMBO USB to RS-422\/RS-485 4-Port DB9 Serial Adapter\/Converter\" target=\"_blank\"\u003eMulti-4\/USB COMBO USB to RS-42\/485 4-Port DB9 Serial Adapter\/Converter Manual, Utilities and Specifications Downloads (SystemBase Website\u003c\/a\u003e\u003ca title=\"Multi-2\/USB RS232 USB to RS-232 2-Port DB9 Serial Adapter\/Converter\" href=\"https:\/\/www.sysbas.com\/en\/portfolio-item\/multi-2usb-rs232\/\" target=\"_blank\"\u003e)\u003c\/a\u003e\u003c\/p\u003e","brand":"SystemBase","offers":[{"title":"Default Title","offer_id":44412637217017,"sku":"Multi-4-USB-COMBO","price":179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/products\/usb-to-rs422485-4-port-db9-serial-adapterconverter-multi-4usb-combo-474958.jpg?v=1707417375"},{"product_id":"systembase-multi-8u-combo-usb-to-8-port-rs422-rs485-serial-converter","title":"SystemBase Multi-8U Combo — USB to 8-Port RS422\/RS485 Serial Converter Adapter","description":"\u003ch2\u003e📋 Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSystemBase Multi-8U Combo\u003c\/strong\u003e is a professional-grade USB to 8-port serial converter that instantly adds eight RS422\/RS485 (Combo) serial ports to any Windows or Linux computer through a single USB 2.0 connection. With communication speeds up to 921.6Kbps, ±15kV surge protection on every port, and per-port TX\/RX LEDs for real-time status monitoring, the Multi-8U Combo is built for demanding industrial and commercial serial communication environments.\u003c\/p\u003e\n\u003cp\u003eEach port features a standard DB9 connector and can be independently configured for RS422 (Point-to-Point or Multi-Drop) or RS485 (Echo or Non-Echo) mode using convenient DIP switches — no software configuration required. The unit is USB bus-powered and includes a latching USB connector for secure, vibration-resistant connections.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⭐ Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 Serial Ports from One USB Connection\u003c\/strong\u003e — Adds eight RS422\/RS485 Combo serial ports through a single USB 2.0 port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Communication\u003c\/strong\u003e — Supports data rates up to 921.6Kbps for fast, reliable serial data transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible RS422\/RS485 Modes\u003c\/strong\u003e — Each port is independently configurable via DIP switches: RS422 Point-to-Point, RS422 Multi-Drop, RS485 Non-Echo, or RS485 Echo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e±15kV Surge Protection\u003c\/strong\u003e — Built-in ESD protection on every port safeguards connected equipment from electrical surges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTX\/RX LEDs Per Port\u003c\/strong\u003e — Real-time transmit and receive activity indicators on each of the 8 ports for easy diagnostics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto Toggling\u003c\/strong\u003e — Automatic control of bus I\/O direction for RS422\/RS485 communication, simplifying half-duplex setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlew-Rate Limit Control\u003c\/strong\u003e — Configurable slew-rate limiting reduces EMI and signal reflections for long cable runs (limits speed to 250Kbps when enabled)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination Resistor Support\u003c\/strong\u003e — Built-in 120Ω termination resistors for RS422 and RS485 can be enabled via jumper settings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e+5V Power on Pin 9\u003c\/strong\u003e — Optional external DC adapter allows +5V power delivery through pin 9 of each DB9 connector to power connected devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDB9 Male or Female Serial Connectors\u003c\/strong\u003e — Available with either DB9 Male or DB9 Female serial connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLatching USB Connector\u003c\/strong\u003e — Secure locking USB connection prevents accidental disconnection in industrial environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug and Play\u003c\/strong\u003e — Automatically detected by Windows and Linux — no reboot required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB Bus-Powered\u003c\/strong\u003e — No external power supply required for standard operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📊 Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Ports\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Interface\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003eCombo — RS422 \/ RS485 (switchable per port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController\u003c\/td\u003e\n\u003ctd\u003eFT4232H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Connector\u003c\/td\u003e\n\u003ctd\u003eDB9 Male or DB9 Female - Type selected above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Communication Speed\u003c\/td\u003e\n\u003ctd\u003e921.6Kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS422 Signals\u003c\/td\u003e\n\u003ctd\u003eTXD+, TXD−, RXD+, RXD−\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS485 Signals\u003c\/td\u003e\n\u003ctd\u003eTRXD+, TRXD−\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Protection\u003c\/td\u003e\n\u003ctd\u003e±15kV ESD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Resistor\u003c\/td\u003e\n\u003ctd\u003e120Ω (RS422 and RS485, jumper-selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED Indicators\u003c\/td\u003e\n\u003ctd\u003eTX and RX per port (16 LEDs total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eUSB VBUS (5V \/ 500mA) — external DC adapter optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 9 Power Output\u003c\/td\u003e\n\u003ctd\u003e+5V DC (requires external adapter, max 1A total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported OS\u003c\/td\u003e\n\u003ctd\u003eWindows 7 \/ 8 \/ 10 \/ 11, Windows Server 2008+, Linux Kernel 2.6+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArchitecture Support\u003c\/td\u003e\n\u003ctd\u003e32-bit and 64-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 210 × 84 × 26 mm (8.27 x 3.3 x 1 inches) L × W × H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 320g (11.3 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSystemBase Co., Ltd.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e🔧 Setup \u0026amp; Configuration\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect the USB cable\u003c\/strong\u003e — Plug the latching USB cable into the Multi-8U Combo and connect the other end to an available USB port on your computer. You should hear a click when the latch engages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the driver\u003c\/strong\u003e — Windows will attempt automatic driver installation. If needed, download the latest driver from the SystemBase website and install manually. Linux users should contact SystemBase technical support at tech@sysbas.com.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfigure each port\u003c\/strong\u003e — Use the 2-position DIP switch on each port to select your desired mode: RS422 Point-to-Point (OFF\/OFF), RS422 Multi-Drop (OFF\/ON), RS485 Non-Echo (ON\/OFF, default), or RS485 Echo (ON\/ON).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet termination resistors (if needed)\u003c\/strong\u003e — Use the internal jumpers to enable the 120Ω termination resistor for RS422 or RS485 as required by your network topology.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect your serial devices\u003c\/strong\u003e — Attach your RS422 or RS485 devices to the DB9 connectors and verify communication using the TX\/RX LEDs.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cstrong\u003e💡 Tip:\u003c\/strong\u003e The slew-rate limit jumper defaults to disabled (10M mode, max 921.6Kbps). For long cable runs where signal integrity is a concern, enable the 250K slew-rate limit mode to reduce EMI and reflection waves.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003e📌 DIP Switch Settings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSW1\u003c\/th\u003e\n\u003cth\u003eSW2\u003c\/th\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003cth\u003eMode\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOFF\u003c\/td\u003e\n\u003ctd\u003eOFF\u003c\/td\u003e\n\u003ctd\u003eRS422\u003c\/td\u003e\n\u003ctd\u003ePoint-to-Point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOFF\u003c\/td\u003e\n\u003ctd\u003eON\u003c\/td\u003e\n\u003ctd\u003eRS422\u003c\/td\u003e\n\u003ctd\u003eMulti-Drop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eON (Default)\u003c\/td\u003e\n\u003ctd\u003eOFF (Default)\u003c\/td\u003e\n\u003ctd\u003eRS485\u003c\/td\u003e\n\u003ctd\u003eNon-Echo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eON\u003c\/td\u003e\n\u003ctd\u003eON\u003c\/td\u003e\n\u003ctd\u003eRS485\u003c\/td\u003e\n\u003ctd\u003eEcho\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x SystemBase Multi-8U Combo (RS422\/RS485) Converter - Serial connector type selected above\u003c\/li\u003e\n\u003cli\u003e1x Latching USB Cable\u003c\/li\u003e\n\u003cli\u003e1x Quick Start Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eExternal DC power adapter is not included. Required only if supplying +5V power through DB9 pin 9.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔌 Compatible With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7, 8, 8.1, 10, and 11 (32-bit and 64-bit)\u003c\/li\u003e\n\u003cli\u003eWindows Server 2008, 2012, 2016, 2019, 2022\u003c\/li\u003e\n\u003cli\u003eLinux (Kernel 2.6 and above — contact SystemBase for driver support)\u003c\/li\u003e\n\u003cli\u003eAny RS422 or RS485 serial device with DB9 connectivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🎯 Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial automation and SCADA systems\u003c\/li\u003e\n\u003cli\u003ePOS (Point of Sale) terminal networks\u003c\/li\u003e\n\u003cli\u003eBuilding management and access control systems\u003c\/li\u003e\n\u003cli\u003eData acquisition and laboratory instrumentation\u003c\/li\u003e\n\u003cli\u003eMulti-device RS485 sensor networks\u003c\/li\u003e\n\u003cli\u003eSurveillance and security system integration\u003c\/li\u003e\n\u003cli\u003eCNC machine and PLC communication\u003c\/li\u003e\n\u003cli\u003eTelecommunications equipment management\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe Multi-8U Combo model supports \u003cstrong\u003eRS422 and RS485 only\u003c\/strong\u003e. If you need RS232 ports, look for the \u003ca href=\"https:\/\/envistiamall.com\/products\/systembase-multi-8u-rs232-usb-to-8-port-rs232-serial-converter\" target=\"_blank\" title=\"SystemBase Multi-8U RS232 — USB to 8-Port RS232 Serial Converter Adapter\" rel=\"noopener\"\u003eMulti-8U RS232 model\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAn external 5V DC adapter is required to supply power through pin 9 of the DB9 connectors. Without the adapter, pin 9 does not carry power.\u003c\/li\u003e\n\u003cli\u003eWhen using the slew-rate limit feature (250K mode), maximum communication speed is reduced to 250Kbps.\u003c\/li\u003e\n\u003cli\u003eFor Linux driver support, contact SystemBase technical support at tech@sysbas.com.\u003c\/li\u003e\n\u003cli\u003eThe latching USB connector provides a secure connection — press the spring button lightly and sweep to disconnect.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📄 Documentation \u0026amp; Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/downloads\/usb-serial-series-02-en\/\" title=\"SystemBase Multi-8U Combo User Manual, Driver and Utilities Downloads\" rel=\"noopener\" target=\"_blank\"\u003eMulti-8U COMBO User Manual, Utilities and Specifications Downloads (SystemBase Website)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SystemBase","offers":[{"title":"Male","offer_id":48368006529273,"sku":"Multi-8-USB-COMBO-MALE","price":467.0,"currency_code":"USD","in_stock":false},{"title":"Female","offer_id":48368006562041,"sku":"Multi-8-USB-COMBO-FEMALE","price":479.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/files\/systembase-multi-8u-combo-usb-to-8-port-rs422rs485-serial-converter-adapter-6374783.jpg?v=1778246648"},{"product_id":"systembase-multi-8u-rs232-usb-to-8-port-rs232-serial-converter","title":"SystemBase Multi-8U RS232 — USB to 8-Port RS232 Serial Converter Adapter","description":"\u003ch2\u003e📋 Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSystemBase Multi-8U RS232\u003c\/strong\u003e is a professional-grade USB to 8-port RS232 serial converter that instantly adds eight full-signal RS232 serial ports to any Windows or Linux computer through a single USB 2.0 connection. With communication speeds up to 921.6Kbps, ±15kV surge protection on every port, and per-port TX\/RX LEDs for real-time status monitoring, the Multi-8U RS232 is built for demanding industrial and commercial serial communication environments.\u003c\/p\u003e\n\u003cp\u003eEach port features a standard DB9 connector with full RS232 handshaking signals — TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, and GND — making it ideal for connecting legacy serial devices such as modems, barcode scanners, POS terminals, and industrial controllers. The unit is USB bus-powered and includes a latching USB connector for secure, vibration-resistant connections.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⭐ Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 RS232 Serial Ports from One USB Connection\u003c\/strong\u003e — Adds eight full-signal RS232 serial ports through a single USB 2.0 port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Communication\u003c\/strong\u003e — Supports data rates up to 921.6Kbps for fast, reliable serial data transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull RS232 Handshaking\u003c\/strong\u003e — All 9 signals supported per port: TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, and GND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e±15kV Surge Protection\u003c\/strong\u003e — Built-in ESD protection on every port safeguards connected equipment from electrical surges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTX\/RX LEDs Per Port\u003c\/strong\u003e — Real-time transmit and receive activity indicators on each of the 8 ports for easy diagnostics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e+5V Power on Pin 9\u003c\/strong\u003e — Optional external DC adapter allows +5V power delivery through pin 9 of each DB9 connector to power connected devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDB9 Male or Female Serial Connectors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— Available with either DB9 Male or DB9 Female serial connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLatching USB Connector\u003c\/strong\u003e — Secure locking USB connection prevents accidental disconnection in industrial environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug and Play\u003c\/strong\u003e — Automatically detected by Windows and Linux — no reboot required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB Bus-Powered\u003c\/strong\u003e — No external power supply required for standard operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📊 Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Ports\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Interface\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003eRS232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController\u003c\/td\u003e\n\u003ctd\u003eFT4232H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Connector\u003c\/td\u003e\n\u003ctd\u003eDB9 Male or DB9 Female - Type selected above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Communication Speed\u003c\/td\u003e\n\u003ctd\u003e921.6Kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS232 Signals\u003c\/td\u003e\n\u003ctd\u003eTXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, GND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Protection\u003c\/td\u003e\n\u003ctd\u003e±15kV ESD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED Indicators\u003c\/td\u003e\n\u003ctd\u003eTX and RX per port (16 LEDs total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eUSB VBUS (5V \/ 500mA) — external DC adapter optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 9 Power Output\u003c\/td\u003e\n\u003ctd\u003e+5V DC (requires external adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported OS\u003c\/td\u003e\n\u003ctd\u003eWindows 7 \/ 8 \/ 10 \/ 11, Windows Server 2008+, Linux Kernel 2.6+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArchitecture Support\u003c\/td\u003e\n\u003ctd\u003e32-bit and 64-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 210 × 84 × 26 mm (8.27 x 3.31 x 1.02 inches) L × W × H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 320g (11.3 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSystemBase Co., Ltd.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e📌 DB9 Pin Assignment (RS232)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eSignal\u003c\/th\u003e\n\u003cth\u003eDirection\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eDCD (Data Carrier Detect)\u003c\/td\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eRXD (Receive Data)\u003c\/td\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eTXD (Transmit Data)\u003c\/td\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eDTR (Data Terminal Ready)\u003c\/td\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eGND (Signal Ground)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eDSR (Data Set Ready)\u003c\/td\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003eRTS (Request to Send)\u003c\/td\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eCTS (Clear to Send)\u003c\/td\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003eRI (Ring Indicator) \/ +5V Power\u003c\/td\u003e\n\u003ctd\u003eInput \/ Power Out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cstrong\u003e💡 Note:\u003c\/strong\u003e Pin 9 functions as RI (Ring Indicator) by default. When an external DC adapter is connected, pin 9 delivers +5V power to connected devices instead.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003e🔧 Setup \u0026amp; Configuration\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect the USB cable\u003c\/strong\u003e — Plug the latching USB cable into the Multi-8U RS232 and connect the other end to an available USB port on your computer. You should hear a click when the latch engages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the driver\u003c\/strong\u003e — Windows will attempt automatic driver installation. If needed, download the latest driver from the SystemBase website and install manually. Linux users should contact SystemBase technical support at tech@sysbas.com.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify COM port assignment\u003c\/strong\u003e — Open Device Manager (Windows) and confirm that 8 new COM ports appear under \"Ports (COM \u0026amp; LPT).\" You can reassign COM port numbers here if needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect your serial devices\u003c\/strong\u003e — Attach your RS232 devices to the DB9 connectors using standard straight-through or null-modem cables as required by your device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify communication\u003c\/strong\u003e — Use the TX\/RX LEDs on each port to confirm data is being transmitted and received. Open a terminal program (such as PuTTY or Tera Term) to test communication.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cstrong\u003e💡 Tip:\u003c\/strong\u003e If your serial device requires power from the converter, connect an external 5V DC adapter to the Multi-8U RS232. This enables +5V power delivery through pin 9 of each DB9 connector.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x SystemBase Multi-8U RS232 Converter\u003cspan\u003e - Serial connector type selected above\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e1x Latching USB Cable\u003c\/li\u003e\n\u003cli\u003e1x Quick Start Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eExternal DC power adapter is not included. Required only if supplying +5V power through DB9 pin 9.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔌 Compatible With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWindows 7, 8, 8.1, 10, and 11 (32-bit and 64-bit)\u003c\/li\u003e\n\u003cli\u003eWindows Server 2008, 2012, 2016, 2019, 2022\u003c\/li\u003e\n\u003cli\u003eLinux (Kernel 2.6 and above — contact SystemBase for driver support)\u003c\/li\u003e\n\u003cli\u003eAny RS232 serial device with DB9 connectivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🎯 Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePOS (Point of Sale) terminal networks\u003c\/li\u003e\n\u003cli\u003eBarcode scanner and receipt printer connectivity\u003c\/li\u003e\n\u003cli\u003eIndustrial automation and SCADA systems\u003c\/li\u003e\n\u003cli\u003eLegacy modem and dial-up equipment\u003c\/li\u003e\n\u003cli\u003eData acquisition and laboratory instrumentation\u003c\/li\u003e\n\u003cli\u003eBuilding management and access control systems\u003c\/li\u003e\n\u003cli\u003eCNC machine and PLC communication\u003c\/li\u003e\n\u003cli\u003eSurveillance and security system integration\u003c\/li\u003e\n\u003cli\u003eTelecommunications equipment management\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe Multi-8U RS232 model supports \u003cstrong\u003eRS232 only\u003c\/strong\u003e. If you need RS422\/RS485 ports, look for the \u003ca href=\"https:\/\/envistiamall.com\/products\/systembase-multi-8u-combo-usb-to-8-port-rs422-rs485-serial-converter\" target=\"_blank\" title=\"SystemBase Multi-8U Combo — USB to 8-Port RS422\/RS485 Serial Converter Adapter\" rel=\"noopener\"\u003eMulti-8U Combo model\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAn external 5V DC adapter is required to supply power through pin 9 of the DB9 connectors. Without the adapter, pin 9 functions as RI (Ring Indicator).\u003c\/li\u003e\n\u003cli\u003eFor Linux driver support, contact SystemBase technical support at tech@sysbas.com.\u003c\/li\u003e\n\u003cli\u003eThe latching USB connector provides a secure connection — press the spring button lightly and sweep to disconnect.\u003c\/li\u003e\n\u003cli\u003eMaximum cable length for RS232 communication depends on baud rate. For best results at high speeds, keep cables under 15 meters (50 feet).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📄 Documentation \u0026amp; Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.sysbas.com\/en\/downloads\/usb-serial-series-02-en\/\" title=\"SystemBase Multi-8U RS232 User Manual, Driver and Utilities Downloads\" rel=\"noopener\" target=\"_blank\"\u003eMulti-8U RS232 User Manual, Utilities and Specifications Downloads (SystemBase Website)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SystemBase","offers":[{"title":"Male","offer_id":48368023339257,"sku":"Multi-8-USB-RS232-MALE","price":329.0,"currency_code":"USD","in_stock":false},{"title":"Female","offer_id":48368023372025,"sku":"Multi-8-USB-RS232-FEMALE","price":349.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/files\/systembase-multi-8u-rs232-usb-to-8-port-rs232-serial-converter-adapter-5775606.jpg?v=1778246651"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/collections\/Serial-to-usb-converters.png?v=1784730070","url":"https:\/\/envistiamall.com\/es\/collections\/serial-to-usb-converters.oembed","provider":"Envistia Mall","version":"1.0","type":"link"}