The Allen-Bradley 1746-IG16 SLC 500 16-Point Input Module is a TTL-level input module for the SLC 500 family, delivering 16 discrete 5 V DC input points sourced from a common 5 V supply. As a Source-type input module, each of the 16 channels detects standard TTL logic levels and reports its state to the PLC via the 1746 backplane. It is typically used to read digital signals from sensors, pushbuttons, switches, and other 5 V logic devices in industrial automation, enabling compact, in-slot monitoring of 16 inputs in a single module.
