Module identity and backplane fit
CS1W-OA201 is an 8-point solid-state output module for the Omron CS Series. It mounts on the backplane and terminates through screw terminals, matching the standard form factor of other CS1W discrete I/O slices.
Comparing to CS1W-OD212 — same series, different channel count
Both CS1W-OA201 and the sibling CS1W-OD212 are solid-state output modules for the CS Series backplane with identical mounting and screw terminations. The key difference is output quantity: 8 versus 16. If the original panel was wired for 16 outputs, swapping in the 8-point module leaves eight terminals unused — function depends on whether those channels are required or can be remapped.