Allen-Bradley 1756-IB16 NSNBC01 Digital Input Module

The Allen-Bradley 1756-IB16 NSNBC01 Digital Input Module is a 16-channel DC input card for the ControlLogix 1756 I/O backplane that reads field signals in the 10–31 VDC range using current-sinking inputs. It uses 20-pin removable terminal blocks for field wiring, fits in a single 1756 I/O slot, and communicates with the backplane to report per-channel state plus overall module health. Built for industrial environments, its status LEDs display input activity, backplane communication, and module health to aid troubleshooting, while the module supports standard ControlLogix I/O addressing and online diagnostics via the Studio 5000/RSLogix 5000 software family. Typical applications include wiring 24 VDC sensors, limit switches, and pushbuttons in automation, packaging, and process-control systems where compact, reliable digital inputs are required. This module is part of the 1756 digital I/O family, designed to integrate with other 1756-series I/O for scalable control architectures.