Product Overview

The Allen-Bradley 1797-BIC serves as the critical communication bridge between standard control environments and intrinsically safe zones. As a high-performance Bus Isolator, it provides the necessary galvanic isolation to extend the FLEXbus backplane into hazardous locations (Zone 1/2). This module ensures that electrical energy remains below ignition thresholds, protecting volatile atmospheres while maintaining seamless data flow to your PLC architecture.

Condition Note: We supply this component in 100% Brand New, original factory condition to ensure maximum lifecycle longevity for your critical systems.

Technical Specifications

The 1797-BIC maintains rigorous safety parameters to meet CENELEC, FM, and cULus standards.

Engineering Advantages

The 1797-BIC solves specific integration challenges in complex process plants:

• Hazardous Zone Transition: This module eliminates the need for bulky, expensive explosion-proof enclosures by utilizing intrinsic safety (IS) principles. It allows you to mount I/O closer to sensors in Zone 1 environments.

• Galvanic Separation: High-quality internal circuitry prevents ground loops and protects the "safe area" control hardware from faults occurring in the field.

• Space Efficiency: The slim DIN-rail design integrates directly with the FLEX I/O stack, reducing the footprint compared to traditional isolation barriers.

• Robust Connectivity: Supports specialized 1794-CE1 and 1794-CE3 cables, ensuring high-integrity bus extension even in high-vibration or electrically noisy industrial settings.

FAQs

• Can I use the 1797-BIC to connect standard 1794 FLEX I/O modules?

  No. The 1797-BIC specifically interfaces with 1797 FLEX Ex modules. It acts as the "gatekeeper" between the non-hazardous power source and the intrinsically safe field modules.

• What happens if the power supply exceeds 32V DC?

  The module operates strictly within an 18-32V DC window. Exceeding these limits risks tripping internal protection or compromising the intrinsic safety rating. Always use a regulated 24V DC power supply.

• Does this module require a specific mounting orientation?

  While it supports DIN rail mounting, you must ensure adequate thermal dissipation. In high-temperature environments, horizontal mounting provides the best airflow to maintain the 70°C peak operating rating.

• How many field modules can a single 1797-BIC drive?

  A single isolator supports a maximum of eight (8) FLEX Ex I/O modules. If your rack exceeds this, you must implement an additional isolator to maintain signal integrity and safety compliance.