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Honeywell M/300MJ

Monitor Modules with Flash Scan®

MPN: M/300MJ
Category: Honeywell Fire Alarm Panels & Modules

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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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What is the Honeywell M/300MJ?

The Monitor Module are intended for use in intelligent, two-wire systems, where the individual address of each module is selected using the built-in rotary switches. It provides either a two-wire or four-wire fault-tolerant Initiating Device Circuit (IDC) for normally-open-contact fire alarm and supervisory devices. The module has a panel-controlled LED indicator.

The M300MJ can be used to replace M500MJ modules in existing systems. Each M300MJ uses one of the available module addresses on an SLC loop. It responds to regular polls from the control panel and reports its type and the status (open/normal/short) of its Initiating Device Circuit (IDC). A flashing LED indicates that the module is in communication with the control panel. The LED latches steady on alarm (subject to current limitations on the loop). Features & Benefits:

Built-in type identification automatically identifies this device as a monitor module to the control panel

Powered directly by two-wire SLC loop. No additional power required

High noise (EMF/RFI) immunity

SEMS screws with clamping plates for ease of wiring

Direct-dial entry of address

LED flashes green during normal operation and latches on steady red to indicate alarmCertifications:

UL: S1570

ULC: S8643

FM Approved

CSFM: 7165-0554:0153 (with IFC2-640, IFC-320), 7165- 0554:0149 (with IFC2-3030)

MEA: 457-99-E Vol. 3

FDNY: COA #6036 (with IFC2-640, IFC-320), COA#6053 (with IFC2-3030)

Honeywell Johnson Controls M/300MJ — The Monitor Module are intended for use in intelligent, two-wire systems, where the individual address of each module is selected using the built-in rotary switches. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Specifications

Product

Lifecycle	Active
Brand line	Johnson Controls

Others

Brand	Johnson Controls
Product Type	Monitor Module

M/300MJ: frequently asked questions

When can M/300MJ be shipped?

M/300MJ 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 M/300MJ 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 M/300MJ 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 M/300MJ, subject to availability and destination.