What the CJ1W-B7A22 brings to your rack
The CJ1W-B7A22 is an I/O module for the Omron CJ series PLC platform, combining 32 digital inputs and 32 solid-state outputs on a single DIN-rail slot. It terminates signals via screw terminals, which simplifies field wiring compared to D-Sub or rectangular connectors used on other CJ1W I/O siblings. Rated for CE and cULus, it installs directly on the backplane bus of a CJ-series CPU rack or expansion rack.
How it compares to similar CJ1W modules
The closest peer in function is the CJ1W-MD261, which also offers 32 inputs and 32 outputs but terminates through a D-Sub connector rather than screw terminals. If your panel is wired with pre-made D-Sub cables, the MD261 saves termination time; if you prefer field-terminated screw clamps, the B7A22 is the direct choice. Another sibling, the CJ1W-MD563, uses a rectangular connector which is less common in field retrofit but standard for factory harnesses. The CJ1W-B7A14 is input-only (64 inputs, no outputs) and is not a functional replacement.
Mounts to DIN rail and occupies one slot in a CJ-series rack. The screw terminals accept conductors; no special backplane power calculation required—the module draws its logic power from the rack bus.