The Allen-Bradley 1756-IA16 is a 16-channel digital input module for the ControlLogix 1756 I/O backplane, engineered to read discrete on/off signals from field devices. It accepts 120 VAC input signals on 16 channels and uses current sinking wiring, making it suitable for sensing switches and other AC-powered sensors wired into a ControlLogix rack. As part of the ControlLogix I/O family, the IA16 interfaces with the backplane to convert voltage-level events into a scalable digital input stream for the controller. Typical applications include monitoring 16 separate pushbuttons, limit switches, or other binary sensors in manufacturing automation.
