Skip to product information
1 of 2

Johnson Controls

Johnson Controls M500XJ Fire Alarm Fault Isolator Module (NEW IN BOX)

Johnson Controls M500XJ Fire Alarm Fault Isolator Module (NEW IN BOX)

Regular price $53.96 USD
Regular price Sale price $53.96 USD
Sale Sold out
Shipping calculated at checkout.

Condition: New

Quantity

Low stock: 1 left

Storewide Quantity discount: Save 5% on 2 items, 8% on 3 items, and 10% on 4+ items (applies automatically at checkout).

You will be prompted to create an account or sign in to complete your purchase.

Buy on eBay

As an eBay Partner, we may be compensated if you make a purchase.

Johnson Controls M500XJ Fire Alarm Fault Isolator Module. This reliable hardware component automatically detects and isolates short-circuit faults on SLC loops to maintain system integrity. - Operating voltage range of 15-32 VDC - Maximum standby current of 450 µA - Compact module dimensions for standard enclosure mounting - Integrated LED status indicator - Compatible with compatible Johnson Controls fire alarm control panels

Engineered for high-performance safety, this module improves upon legacy designs by offering faster response times and enhanced diagnostic capabilities. It effectively isolates branches of the signaling line circuit that experience a short, ensuring the remainder of your fire alarm system continues to monitor the facility without interruption.

Advanced Circuit Protection and Reliability

The M500XJ utilizes sophisticated solid-state technology to monitor the signaling line circuit for impedance fluctuations, instantly disconnecting the affected segment during a short-circuit event. This proactive approach prevents total system failure, allowing your facility to maintain critical life-safety functions even when a wiring fault occurs elsewhere in the loop.

This item description was generated using artificial intelligence and may contain errors. Specifications and compatibility should always be verified using official manufacturer documentation and, where applicable, by a qualified or licensed fire alarm technician.

View full details

About us

We specialize in new, used, and surplus fire alarm and life-safety equipment. Our inventory includes control panels, modules, power supplies, annunciators, detectors, and related accessories from leading manufacturers. Listings reflect current, in-stock availability and are updated regularly. Orders ship quickly and are packed with care.

For additional details, please review our Terms of Service, Shipping Policy and Refund Policy before placing your order. Please contact us with any questions.