Allen-Bradley 1756-OB16D Digital Output Module

The Allen-Bradley 1756-OB16D is a ControlLogix digital output module that provides 16 DC outputs for ControlLogix I/O, designed to source 24 V DC loads with a maximum of 1 A per point. Operating from a 19–30 V DC range and mounting in a 1756 backplane, it uses a 36-pin field-wiring terminal block to connect each of the 16 outputs. The module is a DC digital output with diagnostic capability, enabling built-in monitoring of output health and fault conditions to aid troubleshooting in automation systems. Applications include energizing relays, solenoids, and small DC actuators on manufacturing lines, packaging equipment, conveyors, and other machine-automation tasks where sixteen parallel 24 V DC outputs are required. As a member of the ControlLogix I/O family, the 1756-OB16D integrates with Rockwell Automation's ecosystem for configuration, diagnostics, and backplane communication, with the part number 1756-OB16D denoting a 16-channel, Diagnostics-enabled DC output module. This combination of 16 points, 36-pin terminal block, and a 19–30 VDC operating window provides a compact, scalable solution for expanding digital control without sacrificing channel-by-channel visibility or reliability.