Allen-Bradley 1756-OB16D DC Diag Output Module

The Allen-Bradley 1756-OB16D ControlLogix Diagnostic DC Output Module provides 16 discrete 24 V DC outputs for controlling loads in a ControlLogix system. It operates from a supply of 19.2 to 30 V DC and each channel is rated for up to 2 A, with a total module limit of 8 A and a maximum power dissipation of 3.3 W at 60°C. The 16 outputs are wired via removable terminal blocks (1756-TBCH or 1756-TBS6H) on a 36-pin block, designed for straightforward field wiring within the 1756 backplane. Isolation voltage is specified at 50 V continuous, and backplane current draw is about 140 mA at 24 V and 250 mA at 5 V, reflecting its DC digital I/O design. As a Diagnostic DC Output Module, it integrates with Rockwell Automation's ControlLogix architectures and provides channel-level diagnostic information to aid fault detection and troubleshooting in DC load circuits, such as relays, coils, or other 24 V devices used in factory automation.