{"product_id":"sig-5540-4-port-digital-input-io-gateway-with-modbus-tcp","title":"Sollae Systems SIG-5540 4-Port Digital Input Ethernet I\/O Gateway with Modbus\/TCP","description":"\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eMonitor digital sensors and switches across your network with the\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"font-semibold\"\u003eSollae Systems SIG-5540, \u003c\/span\u003ea professional-grade digital input Ethernet gateway that transforms traditional on\/off sensors into intelligent, network-connected devices.\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\"\u003eWhether you're monitoring door sensors, limit switches, push buttons, or any digital signal source, the SIG-5540 makes it simple to integrate these inputs into your SCADA system, HMI, or monitoring platform using the industry-standard Modbus\/TCP protocol.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eWhat Makes the SIG-5540 Essential for Digital Monitoring?\u003c\/span\u003e\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\"\u003eThe SIG-5540 eliminates the complexity of digital input integration. Instead of running individual wires back to your control room, simply connect your sensors to the gateway, plug in an Ethernet cable, and access real-time status from anywhere on your network. It's that straightforward.\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\"\u003eKey capabilities:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003e4 independent digital input ports\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003esupporting wet contact, dry contact, NPN, and PNP sensors\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eBuilt-in counter function\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eon each port for counting events like door openings, production cycles, or pulses\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eModbus\/TCP protocol\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003efor seamless integration with virtually any industrial control system\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eIndustrial temperature range\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003efrom -40°C to +85°C for reliable operation in harsh environments\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eMultiple simultaneous connections\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003esupporting up to 4 TCP sessions at once\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eWide voltage input range\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003efrom 4.5V to 25V for flexible sensor compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eSIG-5540 TECHNICAL SPECIFICATIONS\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eDigital Input Capabilities\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eNumber of Ports:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e4 independent channels\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eInput Types:\u003c\/span\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eWet Contact (powered sensors)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eDry Contact (switch closures)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eNPN Transistor outputs\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePNP Transistor outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eInput Voltage Range:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e4.5V to 25V DC\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eON Threshold:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eHigher than 4.5V DC\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eOFF Threshold:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLower than 1V DC\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eTerminal Block:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e3.5mm pitch, 6-pole screw terminals\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCounter Function:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eConfigurable trigger on rising edge, falling edge, or both\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eSignal Validation Time:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e100-30,000ms (adjustable to filter noise)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eNetwork Interface\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eEthernet:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e10\/100 Mbps auto-sensing (RJ45)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCable Support:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eStraight-through or crossover cables (auto-detect)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eProtocols:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eModbus\/TCP, TCP\/UDP, ICMP, DHCP, mDNS, SSL\/TLS\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eIP Support:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eIPv4\/IPv6 dual stack\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eConnections:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eUp to 4 simultaneous TCP sessions\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eDefault Port:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e502 (Modbus\/TCP standard)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eConnection Modes:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eTCP Server or TCP Client\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003ePower Requirements\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eInput Voltage:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eDC 5V ±0.5V\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCurrent Draw:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eTypically 284mA\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eProtection:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eReverse voltage and surge protection built-in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003ePhysical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eDimensions:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e94mm × 57mm × 24mm (3.7\" × 2.2\" × 0.9\")\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eWeight:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eApproximately 64g (2.3 oz)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eMounting:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCompact design for DIN rail or panel mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eEnvironmental\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eOperating Temperature:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e-40°C to +85°C (-40°F to +185°F)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eStorage Temperature:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e-40°C to +85°C (-40°F to +185°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eIndicators\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eLEDs:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eRUN (system status), LINK (network connection), MTX (transmit), MRX (receive), Di0, Di1, Di2, Di3 (individual port status)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eCertifications \u0026amp; Compliance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCE:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eEMC 2014\/30\/EU, RoHS 2011\/65\/EU\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eFCC:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ePart 15 Subpart B, Class A\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eKC:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eRegistration (KN 32, KN 35)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eWHAT'S INCLUDED\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eSIG-5540 4-Port Digital Input I\/O Gateway\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eQuick Start Guide\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eFree spFinder configuration software (download from manufacturer)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eFree ModMap mobile app for iOS and Android\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem class=\"italic\"\u003eAll software is available for download from the Sollae Systems ezTCP website. See the link under the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTechnical Support \u0026amp; Resources\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esection below.\u003c\/em\u003e\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\"\u003eNote:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ePower supply (5V DC), Ethernet cable, and sensors sold separately\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eKEY FEATURES \u0026amp; BENEFITS\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eUniversal Digital Input Compatibility\u003c\/span\u003e\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\"\u003eThe SIG-5540 accepts virtually any digital signal type. Whether you're working with powered sensors (wet contact), simple switches (dry contact), or transistor outputs (NPN\/PNP), this gateway handles them all. The wide 4.5V-25V input range ensures compatibility with most industrial sensors.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eIntelligent Counter Function\u003c\/span\u003e\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\"\u003eEach digital input port includes a built-in counter that tracks state changes. Configure each counter to trigger on rising edges (off-to-on), falling edges (on-to-off), or both. Perfect for counting production cycles, door openings, pulses from flow meters, or any event-based monitoring.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eTrue Industrial-Grade Reliability\u003c\/span\u003e\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\"\u003eWith an operating temperature range from -40°C to +85°C, the SIG-5540 handles extreme environments that would disable consumer-grade equipment. Built-in reverse voltage and surge protection safeguard your investment against electrical faults.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eModbus\/TCP Native Support\u003c\/span\u003e\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\"\u003eNo protocol conversion needed. The SIG-5540 speaks Modbus\/TCP natively, making integration with PLCs, SCADA systems, and HMIs completely straightforward. Access your digital input states and counter values using standard Modbus function codes.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eMultiple Simultaneous Connections\u003c\/span\u003e\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\"\u003eSupport up to 4 concurrent TCP sessions, allowing your HMI, SCADA system, data logger, and monitoring software to all access the gateway simultaneously without conflicts. Each connection can independently read input states and counters.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eSmart Internet Switch Functionality\u003c\/span\u003e\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\"\u003eConfigure the gateway to communicate directly with other networked devices without requiring a central HMI. When a digital input changes state, the gateway can trigger actions on other Modbus\/TCP devices—enabling distributed automation without complex programming.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eEasy Configuration \u0026amp; Monitoring\u003c\/span\u003e\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\"\u003eThe included spFinder software provides an intuitive interface for:\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eDevice discovery on your network\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eComplete configuration management\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eReal-time monitoring of all digital inputs and counters\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eViewing connection status and statistics\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eFirmware updates (online or manual)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eExport\/import of configuration settings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eMobile Monitoring with ModMap\u003c\/span\u003e\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\"\u003eThe free ModMap app (iOS and Android) lets you monitor your digital inputs from your smartphone or tablet. Perfect for quick status checks or remote troubleshooting without needing a laptop.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eAdjustable Signal Validation\u003c\/span\u003e\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\"\u003eConfigure the signal validation time (100-30,000ms) to filter out electrical noise and contact bounce. This ensures only legitimate state changes are registered, preventing false triggers from unstable signals.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eTYPICAL APPLICATIONS\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eIndustrial Automation\u003c\/span\u003e\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\"\u003eMonitor limit switches, proximity sensors, push buttons, and emergency stops in manufacturing environments. Track production counts and machine cycles.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eAccess Control \u0026amp; Security\u003c\/span\u003e\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\"\u003eMonitor door sensors, motion detectors, glass break sensors, and alarm contacts. Count entries and exits for occupancy tracking.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eBuilding Automation\u003c\/span\u003e\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\"\u003eTrack window\/door status, occupancy sensors, smoke detectors, and HVAC status switches in smart building systems.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eProcess Monitoring\u003c\/span\u003e\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\"\u003eMonitor pump status, valve positions, tank level switches, and equipment run status in industrial processes.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eEnergy Management\u003c\/span\u003e\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\"\u003eTrack equipment on\/off states, circuit breaker status, and power availability across electrical distribution systems.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eTransportation \u0026amp; Logistics\u003c\/span\u003e\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\"\u003eMonitor gate positions, vehicle presence sensors, conveyor status, and package counting in warehousing and distribution.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eEnvironmental Monitoring\u003c\/span\u003e\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\"\u003eTrack alarm conditions, equipment failures, and threshold violations in remote monitoring stations.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eSETUP \u0026amp; CONFIGURATION\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eGetting Started in 5 Simple Steps:\u003c\/span\u003e\u003c\/h3\u003e\n\u003col class=\"ml-8 list-outside list-decimal\"\u003e\n\u003cli class=\"py-0.5\"\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\"\u003ePower Connection\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eConnect a 5V DC power supply to the 2-pole power terminal\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eObserve the RUN LED to confirm power-up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\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\"\u003eSensor Wiring\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eConnect your digital sensors to the 6-pole terminal block\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eWire according to your sensor type (wet contact, dry contact, NPN, or PNP)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eRefer to the included wiring diagrams for proper connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\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\"\u003eNetwork Connection\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eConnect an Ethernet cable from your network to the RJ45 port\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eThe gateway supports both DHCP (automatic IP) and static IP addressing\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eObserve the LINK LED to confirm network connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\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\"\u003eConfiguration\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eDownload and install the free spFinder software\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eSearch for the device on your network\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eLog in (default ID: sig-5540, password: sig-5540)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eConfigure network settings, TCP parameters, and counter settings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\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\"\u003eIntegration\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eAccess digital input states and counters via Modbus\/TCP from your SCADA system or monitoring software\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUse standard Modbus function codes to read registers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eDefault Settings:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eLogin ID:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003esig-5540\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003ePassword:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003esig-5540 (change immediately for security)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eNetwork:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eDHCP enabled by default\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eTCP Port:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e502 (Modbus\/TCP standard)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eConnection Mode:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eTCP Server\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCounter Trigger:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eRising edge (all ports)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eValid Time:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e100ms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eWIRING DIAGRAMS\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eThe SIG-5540 supports four common digital input types:\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eWet Contact (Powered Sensors)\u003c\/span\u003e\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\"\u003eConnect sensors that provide their own voltage output (4.5V-25V). Common with industrial proximity sensors and photoelectric sensors.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eDry Contact (Switch Closures)\u003c\/span\u003e\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\"\u003eConnect simple switches, relay contacts, or push buttons. The gateway provides the necessary voltage through internal pull-up resistors.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eNPN Transistor Outputs\u003c\/span\u003e\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\"\u003eConnect sensors with NPN open-collector outputs (sinking). Common with many Asian-manufactured sensors.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003ePNP Transistor Outputs\u003c\/span\u003e\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\"\u003eConnect sensors with PNP open-collector outputs (sourcing). Common with European-manufactured sensors.\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\"\u003eComplete wiring diagrams for all input types are included in the user manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eMODBUS REGISTER MAP\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eThe SIG-5540 provides comprehensive data access through Modbus\/TCP registers:\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eRead-Only Registers:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eDigital Input Status\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- Current state of each input (0=OFF, 1=ON)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eInverted Digital Input Status\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- Inverted state for reverse logic applications\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eDigital Input Port Counters\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- 32-bit counter value for each port\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eDevice Information\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- Model, firmware version, uptime, network status\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eRead\/Write Registers:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eReset Digital Input Port Counter\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- Clear counter values\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eNotification Enable\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e- Configure event notifications (basic and extended)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eComplete register addresses and function codes are detailed in the included user manual.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eCOUNTER FUNCTION DETAILS\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eEach digital input port includes a sophisticated counter with configurable triggering:\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eTrigger Modes:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eRising Edge:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCount when input transitions from OFF to ON\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eFalling Edge:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCount when input transitions from ON to OFF\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eBoth Edges:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCount on any state change\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eSignal Validation:\u003c\/span\u003e\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\"\u003eConfigure the minimum signal duration (100-30,000ms) required for a valid state change. This filters out:\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eContact bounce from mechanical switches\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eElectrical noise and transients\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eUnstable sensor outputs\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eEMI-induced false triggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eCounter Range:\u003c\/span\u003e\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\"\u003eEach counter is a 32-bit value, allowing counts from 0 to 4,294,967,295 before rolling over.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eCounter Reset:\u003c\/span\u003e\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\"\u003eCounters can be reset individually or all at once via Modbus write commands.\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eADVANCED FEATURES\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eInternet Switch Functionality\u003c\/span\u003e\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\"\u003eThe SIG-5540 can communicate directly with other Modbus\/TCP devices without requiring a central HMI. Configure the gateway to monitor its digital inputs and trigger actions on remote devices when conditions are met.\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\"\u003eExample:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eWhen a door sensor (digital input) detects an opening, the gateway can automatically send a command to a relay module to turn on lights—all without involving a PLC or SCADA system.\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eSecurity Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003ePassword Protection:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eSecure access to configuration settings\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eSSL\/TLS Support:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eEncrypted communications for sensitive data\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eRemote Access Control:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eEnable\/disable remote configuration as needed\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eLocal\/Network Search Control:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eRestrict device discovery for security\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eDiagnostic Capabilities\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eReal-time Statistics:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eMonitor TCP connection states, Modbus frame counts, and data throughput\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eCommunication Logging:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eTrack all Modbus queries, responses, and errors via console\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eLED Indicators:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eVisual feedback for power, network link, data transmission, and individual input states\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eConnection Timeout:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eConfigurable timeout (0-3600 seconds) for automatic connection termination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eFlexible Connection Modes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eTCP Server Mode:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eGateway listens for incoming connections (default)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eTCP Client Mode:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eGateway initiates connections to a specified host\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cspan class=\"font-semibold\"\u003eMultiple Connection Support:\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eEnable up to 4 simultaneous TCP sessions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eCOMPATIBLE SENSORS \u0026amp; DEVICES\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"overflow-wrap-anywhere mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eThe SIG-5540 works with any digital sensor or switch that outputs:\u003c\/p\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eWet Contact Sensors (4.5V-25V)\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eProximity sensors (inductive, capacitive, photoelectric)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eLimit switches with built-in power\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eReed switches with external power\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eHall effect sensors\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePhotoelectric sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eDry Contact Devices\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eMechanical switches (toggle, push button, selector)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eRelay contacts\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eThermostat contacts\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eFloat switches\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePressure switches\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eDoor\/window sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eNPN Transistor Outputs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eAsian-manufactured proximity sensors\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePhotoelectric sensors (NPN type)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eEncoder outputs\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePLC digital outputs (NPN)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003ePNP Transistor Outputs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003eEuropean-manufactured proximity sensors\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePhotoelectric sensors (PNP type)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003eSafety sensors\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003ePLC digital outputs (PNP)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eFREQUENTLY ASKED QUESTIONS\u003c\/span\u003e\u003c\/h2\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 mix different sensor types on the same gateway?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Yes! Each of the 4 ports can be independently connected to wet contact, dry contact, NPN, or PNP sensors. The gateway automatically adapts to the signal type.\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's the difference between wet contact and dry contact?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Wet contact sensors provide their own voltage output (4.5V-25V), while dry contact devices are simple switch closures that rely on the gateway's internal pull-up voltage. Think of wet contact as \"powered sensors\" and dry contact as \"simple switches.\"\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 do I prevent false counts from switch bounce?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Use the Valid Time setting (100-30,000ms) to specify the minimum signal duration required for a valid state change. For mechanical switches, set this to 50-100ms to filter out bounce.\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: Can I reset the counters remotely?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Yes, counters can be reset individually or all at once via Modbus write commands to the appropriate registers. You can also reset them through the spFinder software.\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 happens when a counter reaches its maximum value?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: The 32-bit counter rolls over to 0 after reaching 4,294,967,295. For most applications, this provides effectively unlimited counting capacity.\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: Can multiple devices access the gateway simultaneously?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Yes, the SIG-5540 supports up to 4 simultaneous TCP connections. Enable the Multiple Connection feature in the configuration to allow your HMI, SCADA system, data logger, and monitoring app to all connect at the same 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: What software do I need to read the digital inputs?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Any Modbus\/TCP client software will work. Popular options include ModScan, QModMaster, the free ModMap mobile app, or integration directly into your SCADA system (Ignition, Wonderware, etc.). The free spFinder software is used for configuration and monitoring.\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 do I access the gateway remotely over the internet?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Configure port forwarding on your router to forward external traffic to the gateway's IP address and port 502. For enhanced security, use a VPN connection instead of direct internet exposure. Remote access can be enabled\/disabled in the security 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: What power supply do I need?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: You need a regulated 5V DC power supply capable of at least 300mA (the gateway typically draws 284mA). Ensure the power supply is within the ±0.5V tolerance (4.5V to 5.5V).\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: Can I use this outdoors?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: The SIG-5540 operates reliably from -40°C to +85°C, but it should be installed in a weatherproof enclosure if used outdoors to protect against moisture and physical damage.\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's the maximum cable length for digital inputs?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003eA: Cable length depends on the sensor type and environmental noise. For dry contact and wet contact sensors, 100 meters is typically safe. For NPN\/PNP sensors, follow the sensor manufacturer's recommendations (usually 20-50 meters).\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003e\u003cspan class=\"font-semibold\"\u003eTECHNICAL SUPPORT \u0026amp; RESOURCES\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SIG-5540 4-Port Digital Input I\/O Gateway Product Page\" href=\"https:\/\/www.eztcp.com\/en\/products\/sig-5540\" target=\"_blank\"\u003e\u003cstrong\u003eSIG-5540 4-Port Digital Input I\/O Gateway Product Page\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SIG-5540 4-Port Digital Input I\/O Gateway Datasheet\" href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/ds_sig5540en.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eSIG-5540 4-Port \u003c\/strong\u003e\u003cstrong\u003eDigital Input I\/O Gateway Datasheet\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SIG-5540 4-Port Digital Input I\/O Gateway User Manual\" href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/sig5540en.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eSIG-5540 4-Port \u003c\/strong\u003e\u003cstrong\u003eDigital Input I\/O Gateway User Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/an_modbus_tcp_en.pdf\" title=\"ModBus\/TCP Protocol ezTCP Application Note\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eModBus\/TCP Protocol ezTCP Application Note\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SIG Series I\/O Applications (Internet Switch) Application Note\" href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/combinations_sig_en.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eSIG Series I\/O Applications (Internet Switch) Application Note\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"ModMap User Manual\" href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/an_modmap_en.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eModMap User Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/spFinder.zip\" title=\"spFinder : Management program for Packageware Products(for Windows)\" rel=\"noopener\" target=\"_blank\"\u003espFinder Management Program for Packageware Products (for Windows) Download\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.eztcp.com\/en\/download\/pds_files\/ModMap_21C.zip\" title=\"ModMap HMI Application for Remote I\/O Gateway (Supports Modbus\/TCP) Download\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eModMap HMI Application for Remote I\/O Gateway (Supports Modbus\/TCP) Download\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\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\u003cem class=\"italic\"\u003eThe SIG-5540 is designed for professional industrial applications. Basic networking knowledge and familiarity with Modbus\/TCP protocol recommended for optimal deployment.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sollae Systems","offers":[{"title":"Default Title","offer_id":47501319995641,"sku":"SIG-5540-BO","price":142.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/files\/sollae-systems-sig-5540-4-port-digital-input-ethernet-io-gateway-with-modbustcp-9424326.jpg?v=1773357908","url":"https:\/\/envistiamall.com\/products\/sig-5540-4-port-digital-input-io-gateway-with-modbus-tcp","provider":"Envistia Mall","version":"1.0","type":"link"}