The Allen-Bradley 1791-24AR is an AC-powered mixed input/output Block I/O module from the Rockwell Automation 1791 series, designed for reliable distributed control in industrial automation systems. It provides 24 input channels and 8 relay output channels, with an input voltage range of 79 to 132V AC and an output voltage range of 20 to 132V AC, supporting up to 1 amp of maximum resistive current per output. The module operates from an external power source rated between 85 and 132V AC. Measuring 3.85 x 4.35 x 6.95 inches, the 1791-24AR offers compact installation, robust performance, and dependable integration within AC control networks.