Allen-Bradley 1791-24AR Block I Module

The Allen-Bradley 1791-24AR Block I/O Module is a compact 32-point I/O block that provides 24 discrete AC inputs and 8 relay outputs in a single housing, purpose-built for the 1791 Block I/O backplane and Rockwell Automation controller ecosystems. Designed to operate at 120 VAC, the module accepts standard line-powered field signals and routes them to the controller, while the eight relay contacts enable local switching of loads such as lights, indicators, or small actuators without extra I/O blocks. This configuration reduces wiring complexity by consolidating multiple sensors and actuators into one module, helping to streamline panel layouts and simplify diagnostics on small automation loops where space and simplicity matter. As part of the 1791 family, the 1791-24AR is intended for use with compatible Allen-Bradley controllers and backplanes, offering reliable discrete I/O with a common 120 VAC power domain and a clear 32-point footprint. Common applications include monitoring proximity or limit switches and energizing low-power relays on a single block, making it a practical choice for compact line start-ups, packaging machines, or small process-control stations where quick, tangible I/O results are needed.