Allen-Bradley 1756-IB16D Digital Input Module

The Allen-Bradley 1756-IB16D is a 16-point digital input module for the ControlLogix 1756 I/O system that converts 16 independent DC sensor signals into a PLC‑accessible data word. It accepts DC input signals in the 10–30 V DC range, enabling straightforward wiring to common industrial devices such as pushbuttons, limit switches, and proximity sensors, with 16 removable terminal blocks for field wiring. Designed as a diagnostic input module, it provides status information and fault indicators to help identify wiring or sensor issues in real time, and it runs with the ControlLogix backplane and 1756 I/O bus. Firmware revisions for the 1756-IB16D, such as v3.x (for example v3.004), support this module’s operation within modern Rockwell Automation environments. This module is well suited to discrete control and automation tasks where a compact, high-channel-count DC input solution is required in ControlLogix configurations, from manufacturing lines to packaging and material handling, enabling direct monitoring of start/stop signals, safety interlocks, and other digital input points.