Allen-Bradley 1756-OB16I Digital Output Module

Allen-Bradley 1756-OB16I is a 16-point, digitally controlled DC output module for ControlLogix systems, delivering 16 independently isolated outputs that operate from 10 to 30 V DC. Each point is rated for up to 2 A at 30 °C (1 A at 60 °C with linear derating), with a total module current capability of 8 A at 30 °C (derating to 4 A at 60 °C). Off-state leakage is limited to 0.5 mA per point, and the on-state voltage drop is up to 1.2 V at 2 A; the module is not fused. The OB16I draws up to 1.8 W of backplane power and dissipates up to 3.6 W at 60 °C, with a surge capacity of 4 A per point for 10 ms (repeatable every 2 s). It provides 12/24 V DC operation with both sink and source capability, and offers 250 V isolation between outputs and the backplane as well as 125 V isolation output-to-output. Outputs can be scheduled and are electronically configurable to hold the last state in fault or program modes by default. Designed for ControlLogix backplanes, the 1756-OB16I is used to switch DC loads within the 10–30 V range in industrial automation applications.