Allen-Bradley 1771-OW16 Electromechanical Output Module

The Allen-Bradley 1771-OW16 is a 16-point electromechanical relay output module for PLC-5 I/O racks, providing sixteen discrete relay contacts that switch field loads from the PLC-5 backplane. This Series B variant (1771-OW16/B) uses electromechanical relays and is designed for connection via the field wiring arm, enabling independent load switching while the controller remains isolated from field transients. The module supports AC loads in the 24–240 VAC range and DC loads in the 24–150 VDC range, with a branch-circuit protection rating of up to 15 A per group, making it suitable for driving solenoids, valves, or other relay-controlled devices. Operating temperature ranges from 0 to 60 °C, and it is compatible with PLC-5 I/O chassis in industrial environments where reliable, discrete switching of multiple loads is required.