Allen-Bradley 1746-IA16 SLC 500 AC Input Module 16-Channel By wayne No Comments on Allen-Bradley 1746-IA16 SLC 500 AC Input Module 16-Channel 2 Min Read Buy the Allen-Bradley 1746-IA16 SLC 500 Digital AC Input Module. This 16-channel module operates at 85-132V AC. Order now for fast delivery.