SMG-5420 ezTCP RS422/485 Modbus Gateway

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  • Regular price $154.00
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MODBUS is a communication protocol widely used for monitoring and controlling various industrial automation equipment represented by PLC (Programmable Logic Controller). It was developed based on serial, but it also has been expanded to network version for application in various communication environments.

The ezTCP SMG-5420 is an industrial Modbus Gateway that converts and routes Modbus data between the serial line and Modbus/TCP. This can help to communicate between the Modbus master (or slave) of the serial line and the Modbus slave (or master) of the network.

The SMG-5420 provides 10/100Mbps Ethernet and RS422/RS485 serial port connectivity.


  • RS422/485 Modbus Gateway
  • 10Base-T/100Base-TX Ethernet
  • RS232 Serial Port
  • Self-developed TCP/IP stack
  • Industrial temperature range (-40C ~ +85C)


  • Serial Physical Interface
    • Serial Interface: RS422/RS485
      TX+, TX-, RX+, RX-, GND with embedded 3.9K biasing resistors and TVS
      TRX+, TRX-, GND with embedded 3.9K biasing resistors and TVS
    • Connector: 3.5mm Pitch Terminal Block
  • Serial Port Property
    • Baudrate: 1,200bps ~ 230,400bps
    • Data Bits: 8 bits, 7 bits with Parity
    • Parity: None, Even, Odd, Mark, Space
    • Stop Bit: 1, 2
  • Network Physical Interface
    • 10Base-T/100Base-TX Ethernet (RJ45)
    • Ethernet Speed Auto Sense
    • 1:1 or Cross-over Cable Auto Sense
  • Software Functions
    • Protocols: IPv4/IPv6 dual stack
      TCP, UDP, ICMP, DHCP, Modbus/TCP, mDNS
      Modbus/RTU, Modbus/ASCII
  • Security
    • Password
  • Indicators (LEDs)
    • Power: Red
    • RUN: Yellow
    • LINK: Green
    • MRX: Green
    • MTX: Green
    • STX: Green
    • SRX: Green
  • Management
    • spFinder: Configuration and Monitoring Tool through Network
  • Dimensions
    • Size: 94mm x 57mm x 24mm
  • Operating Environment
    • Input Voltage: DC 5V±0.5V
    • Protection: Reverse Voltage Protection / Surge Protection
    • Current Consumption: 145mA Typical
    • Operating Temperature: -40C ~ +85C
    • Storage Temperature: -40C ~ +85C
  • Certifications
    • KC: Registration (KN 22, KN 35)
    • CE: EMC 2014/30/EU, RoHS 2011/65/EU
    • FCC: FCC Part 15 Subpart B, Class A

 Package includes:

1X SSMG-5420 ezTCP RS422/485 Modbus Gateway

The delivery of this item is stock to 2 weeks. Please contact us prior to placing your order for a specific delivery time. 

Documentation & Resources:

SMG-5420 / RS422/485 Modbus Gateway Web Page