Allen-Bradley 1746-IA16 is a 16-point AC input module for the SLC 500 PLC family, providing 16 discrete 120 VAC input channels for sensing field devices such as pushbuttons, limit switches, and sensors. It plugs into an SLC 500 backplane to convert these 120 VAC signals into digital inputs the CPU can read. Rockwell Automation notes that the 1746-IA16 was discontinued on November 24, 2022, a consideration for planning around legacy SLC 500 installations.
