Allen-Bradley 1771-OBD I Digital Output Module

Allen-Bradley 1771-OBD digital output module provides 16 sourcing DC outputs in a single-slot 1771 I/O module for PLC-5 systems. It operates on 10–60 V DC and each channel can switch up to 2 A, with a combined module limit of 8 A to prevent overloading the backplane. As a Series C DC output card, it occupies one slot in a PLC-5 I/O chassis and uses standard 1771 data-table addressing for straightforward integration with PLC-5 logic. This module is designed to drive DC loads from a PLC-5 controller, offering high-density, reliable output in industrial automation environments. Its 16 DC outputs are intended for discrete control where a positive-supply arrangement is required, making it a common choice when expanding I/O in older Rockwell Automation installations. When paired with other 1771 DC I/O modules, the 1771-OBD supports scalable control of machines and processes that rely on DC actuators and related devices, within the 10–60 VDC range and current capability noted above.