Allen-Bradley 1747-IB16 SLC 500 Digital Input Module

Allen-Bradley 1747-IB16 SLC 500 Digital Input Module is a 16-channel input module designed to interface digital field signals with an SLC 500 controller. It provides sixteen discrete input points that feed the processor’s image table, enabling ladder logic to read ON/OFF states from sensors, switches, and other digital devices in automation systems. The module plugs into the SLC 500 modular I/O backplane, sharing power and timing with other I/O and allowing straightforward expansion of a controller’s input capability without altering the main PLC. Common applications include monitoring pushbuttons, limit switches, proximity sensors, and other digital devices in factory automation and machine control, with each channel independently read by the CPU to inform control decisions.