Allen-Bradley 1746-OW16 MA459221-137C Output Module

The Allen-Bradley 1746-OW16 is a SLC 500 relay-output module that provides 16 normally open (NO) contacts in two banks of eight, enabling independent switching of external loads from a single 1746 backplane. Designed for broad load compatibility, it accepts an operating voltage range of 5-265 VAC or 5-125 VDC and delivers a continuous maximum of 1.5 A per output at 120 VAC (1.2 A per output at 24 VDC), with each channel protected by a hard-contact relay suitable for discrete automation tasks. The two 8-point groups share common terminals, supporting organized, lane-based wiring in a compact rack while drawing roughly 170 mA from the backplane at 5 V or 180 mA at 24 V, depending on system conditions. Because it is a true relay output module, it provides galvanic isolation between the backplane and the controlled loads, making it appropriate for switching indicators, relays, small peripherals, or other devices in SLC 500 automation architectures where robust contact closure is required.