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    Expansion Modules

    450 μA Fault Isolator Module

    Johnson and Control M500XJ are Fault Isolator Modules which enable part of the communications loop to continue operating when a short circuit occurs on it.

    Overview

    Johnson and Control M500XJ are Fault Isolator Modules which enable part of the communications loop to continue operating when a short circuit occurs on it. An LED indicator blinks in the normal condition and turns on during a short circuit condition. The module will automatically restore the entire communications loop to the normal condition when the short circuit is removed.

    Features & Benefits:
    • Integral LED blinks to indicate normal condition
    • High noise EMF/RFI immunity
    • Wide viewing angle of LED
    • SEMS screws with clamping plates for ease of wiring
    • Automatically resets on correction of short
    Certifications:
    • UL: S1570
    • FM Approved
    • CSFM: 7300-0554:152