Allen-Bradley 1797-BIC FLEX Ex I/O Bus Isolator Module

Overview:

Function: The AB 1797-BIC isolates electrical signals on a communication bus, protecting devices on one segment from electrical faults on another segment. This enhances safety and reliability in industrial environments where electrical disturbances can occur.

FLEX Ex System: This module is designed for use within the Allen-Bradley FLEX Ex system, a fault-tolerant communication network suitable for hazardous locations.

Features:

• Isolation: The key feature is electrical isolation, which prevents high voltage transients or ground faults on one bus segment from affecting devices on another segment.

• Power Supply: The module requires an external DC power supply typically ranging from 18 to 32 volts with a current draw of around 0.15 Amps.

• Indicators: It likely has LED indicators for power status and potential fault conditions (information not explicitly found but common for such modules).

• Connectors: It should have connectors for attaching to the FLEX Ex backplane and the isolated bus segments.

Applications:

The AB 1797-BIC is used in industrial automation systems, particularly in hazardous locations where flammable materials or explosive atmospheres are present. Here's how it helps:

• Safety: By isolating bus segments, the AB 1797-BIC prevents electrical faults from propagating throughout the network, potentially causing sparks or equipment damage. This enhances safety in environments where even a small spark could ignite flammable materials.

• Network Reliability: Isolating faults helps maintain communication on the remaining healthy segments of the bus network. This ensures critical control signals continue to reach their destinations despite a fault in one area.

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