The Allen-Bradley 1746-IB16 is a 16-channel DC input module for the SLC 500 PLC family that provides sinking 24 VDC inputs for field devices such as sensors and switches. Each of the 16 inputs accepts a 10–30 V DC signal and is configured for sinking operation, enabling straightforward interfacing with common 24 V control circuits. The 1746-IB16 plugs into the 1746 backplane used by SLC 500 controllers, enabling modular I/O expansion within existing Allen-Bradley control systems. Typical applications include digital input monitoring in industrial automation, such as button panels, limit switches, and proximity sensors, where reliable 24 V DC signaling is required.
