Omron CJ1W-ETN21 Ethernet Communication Module

The Omron CJ1W-ETN21 Ethernet Communication Module delivers Ethernet-based network connectivity for Omron CJ-Series PLC systems, enabling PLC-to-PC and PLC-to-PLC data exchange across industrial Ethernet networks and supporting remote monitoring and diagnostics. Rack-mounted in CJ1/CJ2 PLC racks, it is used in manufacturing lines, process control, machine automation, and plant-wide networks where reliable data exchange with SCADA systems, HMIs, and enterprise networks is required. Key specifications include Ethernet (100Base-TX), TCP/IP, UDP/IP, and FINS protocols, plus built-in capabilities such as an FTP server, email communication, and SNTP time synchronization; it integrates with CX-Programmer and CX-Integrator for configuration and programming. Compatible with Omron CJ1 and CJ2 PLC systems, the CJ1W-ETN21 supports industrial control panels and networked automation environments where Ethernet-based communication is essential. Common replacements include Omron CJ1W-EIP21 Ethernet/IP Module, CJ1W-ETN11 Ethernet Module, and CS1W-ETN21 Ethernet Unit, offering familiar integration within existing CJ-Series installations.