Allen-Bradley 1771-OAD Programmable Logic Controller Module

The Allen-Bradley 1771-OAD is a 16‑channel AC digital output module for the PLC‑5 1771 I/O system. It mounts in a 1771 I/O backplane and receives its operating power from the chassis backplane, so no separate supply is needed for the module itself. Each of the 16 outputs switches line‑voltage AC loads in the 10–138 VAC range (nominally 120 VAC), enabling direct control of relays, coil actuators, valves, and other field devices in industrial automation. This module is associated with Series C configurations and is specified for an operating ambient temperature of 0–60°C, ensuring reliability in common factory environments. It is designed for use in PLC‑5 installations requiring remote I/O expansion, pairing with standard 1771 I/O wiring practices and compatible backplanes to simplify installation and maintenance.