Ethernet I/O Module with 2 Ethernet Ports and 16 Sink/Source-type Digital Outputs. Providing various digital I/O functions, the ET-2242/2242U 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 industry, and is now the most commonly available means of connecting..