Allen-Bradley 1746-IA16 Digital Input Module SLC 500

Allen-Bradley 1746-IA16 is a SLC 500 digital input module that provides 16 AC input channels for interfacing field devices with the SLC 500 controller family. It is designed for 120 VAC field signals and accepts an operating range of 85–132 VAC at 47–63 Hz, with nominal input voltage around 120 VAC. The 1746-IA16 (and the IA16C variant) plugs into a 1746 backplane in a compatible SLC 500 chassis and reports each input’s status to the processor over the backplane, enabling real-time monitoring of connected devices. Typical applications include reading pushbuttons, limit switches, and proximity sensors in manufacturing lines, packaging cells, and automation rooms where multiple AC inputs are required. Key specs: 16 input points; nominal 120 VAC input; voltage range 85–132 VAC; frequency 47–63 Hz; part of the SLC 500 I/O module family; compatible with Rockwell Automation’s 1746 backplane architecture.