The Omron NXCIF101 is a current-production serial communications interface for the NX I/O system, adding one RS-232C port and one RS-422A/485 port with free-run I/O refreshing. Occupies just 14 mm on the DIN rail — a slim fit for panels where space is already tight. Terminated via screwless clamp terminals; rated 0–55 °C ambient.
Second-source reality check
If your BOM lists a CP1WCIF41.1 Ethernet module, the NXCIF101 is not a plug-in replacement. It uses screwless clamp terminals and RS-232C, not RJ45 or Ethernet.