Allen-Bradley 1746-IN16 SLC 500 16-Point AC/DC Input Module By wayne No Comments on Allen-Bradley 1746-IN16 SLC 500 16-Point AC/DC Input Module 2 Min Read Buy the Allen-Bradley 1746-IN16 SLC 500 input module. It features 16 sinking channels for 24VAC/VDC signals. Reliable and in stock.