Allen-Bradley 1746-IB16 16-Point Input Module

The Allen-Bradley 1746-IB16 is a 16-channel DC input module for the SLC 500 PLC, providing 16 discrete 24 V DC inputs with a sinking configuration; it uses self-lifting pressure plates for convenient wiring and accepts 14 AWG conductors. Each input is rated for 10-30 V DC and the module draws about 85 mA from the backplane at 5 V, with an input-to-backplane signal delay of roughly 8 milliseconds, making it suitable for fast-detection of switch closures and sensor signals. The 1746-IB16 is designed for SLC 500 backplane compatibility and is commonly used to interface with pushbuttons, limit switches, and other DC sensors in industrial automation, enabling straightforward consolidation of 16 digital inputs on a single module.