Allen-Bradley 1756-OB16E ControlLogix Digital Output Module

The Allen-Bradley 1756-OB16E ControlLogix is a 16-point digital DC output module designed for ControlLogix I/O racks, delivering 16 discrete 24V DC outputs that source current from a DC bus to energize connected devices under control of a Logic program, with individual outputs accessible on removable terminal blocks. The module operates from a DC supply in the 10–31.2 V range, and its electronically fused outputs provide per-channel protection, helping safeguard the module and downstream loads against short circuits or overloads while maintaining predictable behavior across the channel set. Firmware is listed as v3.004 for the OB16E, and the device is designed for seamless integration with Rockwell Automation software and ControlLogix controllers in standard 1756 backplane configurations, aligning with Studio 5000 design environments and Rockwell's engineering workflows. In typical automation architectures, the OB16E functions as a dedicated DC output path for loads such as solenoids, relays, or indicator devices, enabling precise control from the central logic while preserving clear separation between control and load circuits.