Allen-Bradley 1771-0A

Allen-Bradley 1771-OA is a PLC-5 discrete digital output module designed to be installed in a 1771 I/O chassis. This single-slot module uses the 1771-WA field wiring arm for direct wiring and is compatible with most 1771 I/O chassis, though it is not compatible with 1771-A1, 1771-A2, or 1771-A4 revisions. Each output is rated for up to 1.5 A, with a total module limit of 6 A, and the unit dissipates up to 16.2 W under maximum load. The 1771-OA is part of the PLC-5 I/O family, designed to switch discrete loads such as relays or indicator devices connected to the PLC, and it can be installed in compatible 1771 I/O chassis using the standard wiring arm for straightforward retrofits. Rockwell Automation lists the 1771-OA as discontinued as of September 29, 2023, which affects current availability but the module remains documented for legacy installations.