The Omron CJ1W-MD232 is a mixed I/O module for the CJ Series PLC backplane, combining 16 digital inputs and 16 solid-state outputs in a single slot. It uses a rectangular MIL connector for pre-wired cable assemblies and mounts on DIN rail. This form factor saves rack space and reduces wiring compared to separate input and output modules, making it suitable for machine control applications with balanced discrete signal counts.
How it compares to the CJ1W-MD233
The CJ1W-MD232 is functionally nearly identical to the CJ1W-MD233: same 16 digital inputs, 16 solid-state outputs, rectangular connector, and DIN rail mounting. The only documented difference is approval scope — the MD232 carries Lloyd's Register marine certification (plus NK), while the MD233 does not. If Lloyd approval is not required, the MD233 is a direct drop-in alternative; for marine or offshore installations, the MD232 is the specified choice. A third sibling, CJ1W-MD231, uses a D-Sub connector instead of rectangular — verify your cable harness before substituting.
Sourcing and integration
The CJ1W-MD232 mounts on DIN rail and uses a rectangular connector for CJ Series backplane integration. It carries CE, cULus, Lloyd, and NK approvals.