OVERVIEW

Official designation: Allen-Bradley 1797-IBN16 (FLEX Ex I/O Module, NAMUR Digital Input)

Role/Application: Provides 16 non-isolated, sinking NAMUR-compatible inputs for intrinsically safe process control in hazardous areas, certified Ex ia IIB/IIC T4.

KEY SPECS SUMMARY

Power: 2.8 Watts dissipation

Interfaces / Ports: 1797-TB3 or 1797-TB3S terminals

Indicators: 16 yellow status, 16 red fault, 1 green power

Operating Temp: Minus 20 to 70 degrees C

Platform / Compatibility: FLEX Ex system, DIN rail mount

Limit: Max load voltage 7.5 Volts DC

Lifecycle: Active

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum load voltage that can be applied to the intrinsically safe input channels?

A: The maximum load voltage on the NAMUR input channels is limited to 7.5 Volts DC.

Wiring & Installation:

Q: What is the maximum size for stranded conductor wire that can be connected to the terminal base?

A: The maximum stranded conductor wire size permitted is 4 mm2 or 12 gauge.

Troubleshooting & Compatibility:

Q: What is the range of selectable input delay times for this NAMUR digital input module?

A: The input delay times are user selectable between 1 millisecond and 33 milliseconds.

Replacement & Upgrades:

Q: What is the certified intrinsically safe input type of the 1797-IBN16 module for hazardous area classification?

A: The IS input type is certified as Ex ia IIB/IIC T4 or AEx ia IIC T4.