Introduction:
Providing a variety of digital I/O functions, the ET-2255U module is an IP-based 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 protocol. Modbus has become a de facto standard communications protocol in industrial applications, and is now the most commonly available means of connecting industrial electronic devices. This makes the ET-2255U module being perfectly integrated with the HMI, SCADA, PLC or other software systems.
The ET-2255U provides 8 wet/dry contact Digital Input channels and 8 sink- or source-type Digital Output channels by wire connection. With 2 Ethernet ports, the ET-2255U allows daisy chain connection which permits the flexibility in locating devices, easy installation and lower infrastructure costs. It features optical isolation for 3000 Vrms of transient overvoltage protection (no channel-to-channel isolation). Each input channel can be used as a 32-bit counter and each output channel can be set up with 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 3750 VDC I/O isolation to enhance the noise protection ability for industrial environment.
The module can be used to create DI to DO pair-connect through the Ethernet. After configuration, the ET-2255U module can continuously poll the status of the local DI channels and then write to the remote DO devices via the Modbus/TCP protocol.
It is equipped with removable terminal block connector for easy and robust wiring in industrial applications, and features a powerful 32-bit ARM MCU to handle efficient network trafficking.