The Allen-Bradley 1746-IV16 is a 16-point DC input module for the SLC 500 family, designed to connect 16 discrete 24 V DC inputs to a 1746 backplane. It accepts 10–30 V DC source-type signals (current sourcing) and is suitable for sensing field devices such as pushbuttons, limit switches, and photoelectric sensors. The module draws about 85 mA from the backplane and introduces an approximate 8 ms input response delay, making it a standard, general-purpose digital input option for SLC 500 controllers.
