The Omron CS1W-SCU31-V1 is a CS1W-series communications module that seats on the CS Series backplane, addressed as a slot card alongside the CPU and the rest of the I/O rack. Field-side termination is a D-Sub connector on the module face — the same gender and pitch convention used elsewhere in the CS1W comm line — so it lands in installations wired for serial CompoWay/F or Host Link drops rather than the RJ45 ethernet footprint of the ETN-series cards.

Omron CS1W-SCU31-V1 Communications Module, CS Series
Omron CS1W-series communications module, CS Series, backplane mount with D-Sub field termination, CE / cULus / Lloyd / NK approved, order code CS1W-SCU31-V1.
Specifications
| Parameter | Value |
|---|---|
| Series | CS1W |
| Parameter | Value |
|---|---|
| Mounting type | Backplane |
| Weight | 0.551 lb (249.93 g) |
| Termination style | D-Sub |
| Parameter | Value |
|---|---|
| Approvals / certifications | CE, cULus, Lloyd, NK |
| Parameter | Value |
|---|---|
| Type | Communications Module |
Product details
Frequently asked questions
What is the closest functional second source for the CS1W-SCU31-V1?
The CS1W-SCU21-V1 is the closest functional sibling in the same CS1W series — same backplane slot, same D-Sub termination, same CS Series host. The procurement-relevant differences are the agency mark (CSA / UL on the SCU21 vs cULus on the SCU31) and a 0.441 lb vs 0.551 lb card body.
What is the listed type and series on this card?
Listed type is Communications Module in the CS1W series, terminating at a D-Sub on the field side and seating on the CS Series backplane.
Will a CS1W-SCU31-V1 drop into a panel specced around the CS1W-SCU21-V1 without rewiring?
Yes — both are CS1W-series backplane communications modules with the same D-Sub field-side footprint, so the panel wiring carries straight over. The panel declaration pack will want updating to reflect the cULus mark replacing the CSA+UL pair that comes with the SCU21.
What compliance mark does the CS1W-SCU31-V1 carry?
CE, cULus, Lloyd and NK — covering European CE-marked panels, North American cULus-listed equipment, Lloyd's Register marine work, and Japanese NK vessel installations.