The Allen-Bradley 1791-16A0 is an AC input Block I/O module from the Rockwell Automation 1791 series, designed for reliable signal interfacing in distributed control systems. It features sixteen (16) input channels organized into two (2) groups of eight (8), providing efficient wiring and configuration flexibility. The 1791-16A0 operates with an external power supply voltage range of 85 to 132V AC at 47–63 Hz and has a current rating of 150 mA. Suitable for both horizontal and vertical mounting, this module supports operating temperatures up to 60°C (140°F). Engineered for use in Remote I/O (RIO) architectures, it ensures stable signal processing and dependable performance in industrial automation environments.