Allen-Bradley 1756-IA16 16-Point Digital Input Module

Allen-Bradley 1756-IA16 is a ControlLogix 16-point digital input module designed to read sixteen discrete AC inputs from field devices into a Rockwell Automation ControlLogix system. The module accepts 79–132 V AC input signals (nominal 120 V AC) and wires to each channel through a removable 16-position terminal block, enabling straightforward field wiring and maintenance. It plugs into the 1756 backplane in a ControlLogix chassis, allowing the processor to read the status of all inputs through the controller’s I/O data table. This module is typically used to monitor line-powered sensors, pushbuttons, limit switches, and other common industrial devices, providing deterministic discrete input data to the PLC for logic, sequencing, and safety interlocks. For configuration and diagnostics, it integrates with standard Rockwell software tools, and its compact, backplane-friendly form factor supports scalable expansion of digital input points in automation projects.