Home / Honeywell / Honeywell Fire Alarm Panels & Modules / M500XJ 500 Series Fault Isolator Module

Available on request

Honeywell – M500XJ 500 Series Fault Isolator Module

MPN: M500XJ · Brand: Honeywell

Price on request

Discontinued by Honeywell — we can still source the original M500XJ (new, used or refurbished, subject to availability). Request a quote below.

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12-month warranty (new) · 3-month (used/refurbished)

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	Confirmed on request
Category	Honeywell Fire Alarm Panels & Modules
Lifecycle	Discontinued
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

Can I still buy the M500XJ now that it is discontinued?

Yes. Honeywell has discontinued the M500XJ, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.

When can M500XJ be shipped?

M500XJ is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up M500XJ in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for M500XJ and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for M500XJ, subject to availability and destination.

Fault Isolator Modules automatically restores the shorted portion of the communications loop to normal condition when the short circuit condition is removed. They automatically open circuit when line voltage drops below four volts. Fault Isolator Modules should be spaced between groups of addressable devices in a loop to protect the rest of the loop. If a short occurs between any two isolators, then both isolators immediately switch to an open circuit state and isolate the groups of sensors between them. The remaining units on the loop continue to fully operate. Features & Benefits:

Integral LED blinks to indicate normal condition. Illuminates steady when short circuit condition is detected

High noise (EMF/RFI) immunity

Wide viewing angle of LED

SEMS screws with clamping plates for ease of wiring

Opens SLC loop automatically on detection of short, preventing the short from causing failure of the entire loop

Automatically resets on correction of short

Supports Style 4, 6, or 7 wiringCertifications:

UL: S1570

ULC: CS669

FM Approved

CSFM: 7300-0554:152

Honeywell M500XJ — Fault Isolator Modules are generally used at each T-tap branch, to limit the effect of short circuits on a branch to the devices on that branch. The LED indicators in modules are continuously ON during a short circuit condition. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.