ET-2255 Ethernet I/O Module with 8-ch DI and 8-ch Sink-type DO


Key Features

  • Built-in Web Server
  • Support Modbus TCP/UDP and MQTT Protocols
  • 2-port Ethernet Switch (LAN Bypass) for Daisy-Chain Wiring
  • Dual Watchdog
  • I/O Pair Connection (Push and Pull)
  • Built-in I/O:
    • 8-channel Wet or Dry contact DI
    • 8-channel Sink-type DO
  • LED Display to Indicate the I/O Status


Providing various digital I/O functions, the ICP DAS ET-2255 module is an Ethernet I/O monitoring and control module. The module can be remotely controlled through a 10/100 M Ethernet network by using Modbus TCP/UDP and MQTT protocols. Modbus has become a de facto standard communications protocol in industry, and is now the most commonly available means of connecting industrial electronic devices. This makes the ET-2255 module perfect integration with the HMI, SCADA, PLC, and other software systems.

The ICP DAS ET-2255 provides 8 wet/dry contact Digital Input channels and 8 sink-type Digital Output channels. With 2 Ethernet ports, the ET-2255 allows daisy chain connection which permits flexibility in locating devices, eases installation, and lowers infrastructure costs. It features optical isolation for 3000 Vrms of transient over-voltage protection but doesn’t provide channel-to-channel isolation. Each input channel can be used as a 32-bit counter and each output channel support configurable power-on and safe values. It can safely be used in applications where hazardous voltages are present. It features 8 kV ESD protection, 4 kV EFT protection, 3 kV surge, and 3000 VDC I/O isolation are also provided to enrich the noise protection ability for the industrial environment.

The module can be used to create a DI to DO pair-connect through the Ethernet. After configuration, the ICP DAS ET-2255 module can poll the status of the local DI channels and then use the Modbus/TCP protocol to continuously write to the remote DO devices.

It is equipped with a removable terminal block connector for easy and robust wiring in industrial situations and features a powerful 32-bit ARM MCU to handle efficient network trafficking.