The Allen-Bradley 1797-IBN16 is a FLEX Ex NAMUR digital input module from Rockwell Automation, designed for use in intrinsically safe (I.S.) hazardous area applications. This module provides sixteen (16) sinking, non-isolated NAMUR-compatible input channels organized into a single group, allowing reliable signal acquisition from field devices in process automation systems. The 1797-IBN16 supports intrinsically safe input types certified as Ex ia IIB/IIC T4, AEx ia IIC T4, Class I, II, III Division 1 Groups A–G T4, and IS module type Ex ib IIB/IIC T4, AEx ib IIC T4, Class I, Division 1 Groups A–D T4. Engineered for high integrity and safety, this module ensures dependable signal interfacing and compliance with international hazardous area standards within FLEX Ex distributed I/O architectures.