The Allen-Bradley 1746-IA16 is a 16-channel digital input module for the SLC 500 PLC family. It accepts 16 AC input signals designed for standard 120 VAC field wiring, with an operating voltage range of 85–132 VAC at 47–63 Hz, making it suitable for readouts from pushbuttons, limit switches, and similar sensors connected to AC power networks. Installed in an SLC 500 chassis, the 1746-IA16 interfaces with the backplane to feed ladder logic or other automation programs, providing scalable digital inputs for expanding control systems that rely on Allen-Bradley controllers.
