Omron CJ1W-ETN21 Ethernet Communications Unit

Omron CJ1W-ETN21 Ethernet Communications Unit is an Ethernet interface module for Omron CJ1W controllers, enabling wired network connectivity in automation projects. Identified by part number 316156, this unit is designed to be installed alongside CJ1W control hardware to extend its communication capabilities. By providing an Ethernet interface, the CJ1W-ETN21 allows the CJ1W controller to participate in networked data exchange with other devices on an industrial network, supporting data sharing, remote monitoring, and coordination with other automation equipment. The module preserves Omron's compact CJ1W form factor and wiring conventions, allowing integration with existing CJ1W installations without substantial hardware changes. In practice, the CJ1W-ETN21 connects CJ1W-based systems to Ethernet networks to enable streamlined controller access and interoperability within a factory IT/OT environment.