1797-ACNR15 | Allen Bradley FLEX Ex Redundant ControlNet Adapter

Product Overview

The Allen Bradley 1797-ACNR15 functions as a high-performance communication interface for the FLEX Ex™ I/O platform. This adapter enables seamless data exchange between a ControlNet network and up to eight intrinsically safe (IS) I/O modules located in Zone 1 or Class I, Division 1 hazardous areas. We supply this unit as 100% Brand New and Original, featuring dual ControlNet BNC ports to provide physical media redundancy for critical process control loops in explosive atmospheres.

Technical Specifications

The 1797-ACNR15 operates with specific power and environmental ratings required for volatile industrial sites:

Engineering Advantages

• Intrinsically Safe Architecture: The 1797-ACNR15 eliminates the need for bulky explosion-proof enclosures or long cable runs from safe zones. By mounting directly in Class I Division 1 areas, it reduces installation costs and simplifies field-side wiring.

• Fault-Tolerant Networking: Dual ControlNet ports ensure system availability. If one coaxial cable fails, the adapter switches communication to the redundant path instantly, preventing process shutdowns in oil, gas, or chemical refinery operations.

• Extreme Thermal Performance: A surrounding temperature rating of up to 85 °C allows this adapter to function in high-heat process environments without the risk of thermal shutdown or signal degradation.

• Streamlined DIN Rail Integration: The module snaps onto standard DIN rails and connects to the FLEX Ex backplane. This modular design permits rapid hardware replacement and scales easily as process requirements expand.

• Rugged Mechanical Build: IEC 68-2-6 compliant vibration testing (2 g) ensures that the unit maintains electrical integrity even when mounted on heavy processing equipment or near high-vibration machinery.

FAQs

• What type of ControlNet cable does this adapter require?

  Use Allen-Bradley RG-6/U Quad shield coax. For standard installations, use part number 1786-RG6. For applications requiring high flexibility, select the 1786-RG6F/A cable.

• How many I/O modules can a single 1797-ACNR15 support?

  This adapter manages a maximum of eight FLEX Ex I/O modules. Ensure your total backplane power consumption does not exceed the adapter's output limits.

• Can I use this module in non-hazardous areas?

  While technically possible, the 1797-ACNR15 is specifically engineered and certified for Intrinsically Safe environments. For standard non-hazardous applications, the 1794-ACNR15 provides a more cost-effective alternative.

• Does this unit arrive in factory-sealed packaging?

  Yes. We guarantee this 1797-ACNR15 is 100% Brand New and Original. Each module arrives in the original manufacturer's box with full documentation and quality seals intact.