Allen-Bradley 1797-IBN16 FLEX Ex Input Module

The Allen-Bradley 1797-IBN16 FLEX Ex Input Module is a 16-channel intrinsically safe digital input module, designed specifically for hazardous area applications. This module is part of the FLEX Ex I/O platform, enabling distributed control in environments that demand explosion protection and robust field connectivity.

Engineers in oil & gas, petrochemical, and process industries rely on this module to safely collect digital signals from sensors, switches, and limit devices located in Zone 1 or Division 1 areas. With its intrinsically safe (IS) circuit design, it ensures reliable data acquisition while minimizing the risk of ignition, providing peace of mind and compliance with international safety standards such as ATEX, IECEx, and UL.

Technical Data Sheet

Practical Applications

• Oil and Gas Platforms – Monitoring pressure and level sensors in explosive zones.

• Chemical Processing Plants – Safe signal acquisition from intrinsically safe transmitters.

• Pharmaceutical Manufacturing – For hygienic and controlled hazardous environments.

• Refineries – Integrates directly with DCS systems through ControlNet or EtherNet/IP.

• Offshore Facilities – Durable against vibration, temperature, and humidity fluctuations.

• Tanker and Pipeline Monitoring – Reliable detection and alarm signal collection.

Core Strengths & Functional Advantages

• Intrinsically Safe Design – Certified for Zone 1/Div 1 use, ensuring explosion-proof operation.

• Compact Modular Format – Space-saving installation on the FLEX Ex backplane.

• Diagnostic LED Indicators – Quick visual troubleshooting on each channel.

• Seamless Integration – Works with ControlNet or EtherNet/IP through Ex adapters.

• High Reliability – Proven component quality under continuous industrial operation.

• Flexible Mounting and Expansion – Compatible with all FLEX Ex accessories.

• Low Power Operation – Reduces heat and energy demand in confined enclosures.

• Global Certification – Meets ATEX, IECEx, UL, and CSA standards.

• Rugged Environmental Tolerance – Designed to operate in extreme field conditions.

• Reduced Maintenance – Plug-and-play installation minimizes wiring complexity.

FAQs

1. Q: Is the 1797-IBN16 safe for installation in Zone 1 environments?

   A: Yes, it is intrinsically safe and certified for Zone 1 and Division 1 hazardous locations.

2. Q: How many channels are included in this module?

   A: The module provides 16 discrete digital input channels.

3. Q: What type of input does it accept?

   A: It supports 24 VDC sinking inputs from intrinsically safe field devices.

4. Q: Can the 1797-IBN16 be used with standard FLEX I/O?

   A: No, it is specifically designed for the FLEX Ex system, not standard FLEX I/O.

5. Q: Which adapters are compatible with this module?

   A: It connects to 1797-ACN15 or other FLEX Ex adapters supporting ControlNet communication.

6. Q: What diagnostic features are available?

   A: Each channel includes a yellow LED for input status indication.

7. Q: How is intrinsic safety ensured?

   A: Through galvanic isolation and current limiting circuitry meeting IS standards.

8. Q: What is the delay time for input signals?

   A: Approximately 4 milliseconds per ON/OFF transition.

9. Q: What is the module’s operating temperature range?

   A: -20 °C to +60 °C, ideal for industrial and offshore environments.

10. Q: What is the weight of the module?

    A: Approximately 0.22 kg (0.49 lb), making it easy to handle and mount.