W&T Web-IO 4.0 Digital 2xIn 2xOut 12-48V DC modulo I/O Ethernet 57737

Monitoring and controlling digital signals over a network often requires complex PLCs or dedicated wiring. The W&T Web-IO 4.0 Digital 57737 simplifies this by providing two digital inputs and two digital outputs accessible via TCP/IP Ethernet. It allows you to read switch states, control relays, and receive alerts directly through a web browser or network protocols, making remote I/O straightforward.

Who is it for

This module suits system integrators, facility managers, and IT professionals who need to integrate digital signals into IP-based monitoring or control systems. It is ideal for applications such as door contact monitoring, machine status indication, or remote switching of low-power devices.

Main features

• 2 digital inputs for potential-free contacts or voltage signals (12-48V DC)
• 2 digital outputs as solid-state relays, each switching up to 0.5A at 48V DC
• 10/100BaseT Ethernet with support for TCP/IP, UDP, HTTP, SNMP, Modbus/TCP, MQTT, SMTP, and NTP
• Web-based configuration and monitoring—no special software required
• Galvanic isolation between Ethernet and I/O for signal integrity
• DIN rail or wall mountable, compact plastic housing (IP20)

Specifications

• Operating voltage: 12-48V DC
• Power consumption: typical 1.5W
• Digital inputs: 2 (potential-free or voltage 12-48V DC)
• Digital outputs: 2 solid-state relays, max 0.5A @ 48V DC each
• Network: 10/100BaseT Ethernet (RJ45)
• Protocols: TCP/IP, UDP, HTTP, SNMP, Modbus/TCP, MQTT, SMTP, NTP
• Operating temperature: 0°C to +70°C
• Storage temperature: -20°C to +70°C
• Housing material: plastic (PA 6.6)
• Mounting: DIN rail (EN 50022) or wall mount
• Connectors: screw terminals for I/O and power, RJ45 for Ethernet

Tips

Use the built-in web interface to set up email alerts or SNMP traps when an input changes state. For integration with existing SCADA or building management systems, enable Modbus/TCP or MQTT. Ensure the power supply is within 12-48V DC and that loads on outputs do not exceed 0.5A per channel.