The Omron CJ1W-OC201 is a basic I/O relay output unit for Sysmac CJ-series PLCs, providing eight independent relay outputs for flexible control of AC and DC loads. Each point can switch up to 2 A at 250 VAC or 24 VDC (16 A per unit total), making it suitable for controlling contactors, solenoid valves, indicator lamps, and other discrete actuators in industrial automation systems. Relay isolation provides galvanic separation between the PLC logic and the field wiring, helping to protect the CPU and internal electronics from electrical noise and transients on the load side.
The CJ1W-OC201 uses a screw terminal block (M3) for secure wiring, allowing direct connection of field cables without additional terminal adapters. LED indicators on the front panel provide at-a-glance status for each output point, simplifying commissioning and troubleshooting. As a basic I/O unit on the CJ I/O Bus, it integrates seamlessly into CJ-series systems (including CJ1/CJ2/NJ with CJ I/O), offering a straightforward way to add isolated relay outputs where needed. With a compact 31 × 90 × 89 mm form factor and a weight of about 88 g, the module fits easily into crowded control panels while still delivering robust switching performance.
