The Omron CJ1W-ETN21 PLC Ethernet Unit provides network communication between CJ-series Programmable Logic Controllers, computers, and compatible industrial devices. Its 10Base-T/100Base-TX interface supports Ethernet connectivity using FINS/TCP and FINS/UDP communication, allowing control and production data to move across industrial networks. Support for up to 64 FINS nodes and 128 UDP nodes makes the unit suitable for control systems involving multiple network participants. IP address configuration can be managed through supported programming and network configuration methods. The CJ1W-ETN21 adds Ethernet networking to the CJ1W control architecture and connects with the wider network-ready PLC range from Omron industrial automation.