Allen-Bradley 1771-OC DC Output Module

The Allen-Bradley 1771-OC DC Output Module is an eight-channel DC output driver for 1771 I/O racks used with PLC-5 controllers. It provides eight sourcing DC outputs that turn external loads on and off when the corresponding bit in the module’s data table is set, with a load voltage range specified from 10 to 60 V DC (some retailer listings describe this as a 48 V DC module). This module is designed for AB 1771-series chassis A and B, making it a straightforward option to expand digital output capability in classic Allen‑Bradley control systems. Typical applications include energizing relays, solenoids, and other DC-operated devices directly from the PLC-5 program, reducing the need for separate driver circuitry for each channel. The 1771-OC integrates with the broader 1771 I/O family to provide a compact, plug-in solution that complements other DC input and output modules in industrial automation panels, helping to streamline wiring and maintainers’ ease of replacement in legacy installations.