Allen-Bradley 1771-OBN 8-Point High-True DC Output Module

Allen-Bradley 1771-OBN is a DC (10–30 V) High-True Output Module for PLC-5 systems, delivering 32 DC outputs arranged as four 8-point banks that plug into a PLC-5 I/O backplane. Each output is rated for up to 0.5 A, with a per-bank limit of 2 A and an overall module limit of 8 A, allowing multiple loads such as relays, coils, or DC actuators to be energized from a single module while keeping total current within spec. The high-true design means an output is energized when its corresponding input is true, making it well-suited for switching actuators directly from the PLC-5 I/O bus. Typical installations use 10–30 V DC supply rails and distribute current across the four banks to match load requirements, with the four 8-point groups simplifying wiring and fault isolation in larger control schemes. This 32-channel DC output option is part of the 1771 family ecosystem, intended for PLC-5 configurations that require expanded, isolated DC outputs in industrial automation environments.