Description
The Fire-Lite MMF-300 is an addressable intelligent monitor module designed for compatible Fire-Lite intelligent fire alarm control panels. It provides an addressable interface for monitoring normally open dry-contact initiating devices, allowing conventional initiating devices to communicate with the fire alarm control panel over the Signaling Line Circuit (SLC).
Designed for new installations and retrofit applications, the MMF-300 supports both Class A (Style D) and Class B (Style B) initiating device circuits. Its built-in status LED, rotary address switches, and durable mounting plate simplify installation and maintenance. This product is intended exclusively for commercial fire alarm installations.
Product Functions
- Monitors normally open dry-contact initiating devices
- Supports supervised Class A (Style D) or Class B (Style B) initiating device circuits
- Reports alarm and supervisory conditions to the fire alarm control panel
- Supervises initiating device wiring
- Supports individual address identification
- Monitors manual pull stations, waterflow switches, valve tamper switches, pressure switches, and other dry-contact devices
- Continuous communication with the Signaling Line Circuit (SLC)
Electrical & System Information
The MMF-300 operates directly from the compatible Fire-Lite 15–32 VDC Signaling Line Circuit (SLC) and requires no separate operating power supply. Device addressing is accomplished using built-in rotary decimal switches.
The initiating device circuit is supervised using the supplied 47 kΩ end-of-line resistor and may be configured for either Class A (Style D) or Class B (Style B) operation. The module mounts to a standard 4-inch square electrical box using the supplied mounting plate.
Features
- Commercial intelligent monitor module
- Addressable SLC communication
- Class A or Class B initiating device circuit
- Rotary decimal addressing
- Built-in status LED
- Powered directly from the SLC
- High EMI/RFI immunity
- SEMS terminal screws with clamping plates
- 47 kΩ end-of-line resistor included
- Durable thermoplastic cover plate
Mounting & Design
The MMF-300 mounts directly to a standard 4-inch square electrical box with a minimum depth of 2⅛ inches. The module includes a durable plastic cover plate with an integrated LED indicator and screw-terminal connections for straightforward field wiring.
Its full-size enclosure provides convenient access for addressing, testing, inspection, and maintenance throughout the life of the system.
Protection & Applications
Suitable for monitoring:
- Manual Pull Stations
- Waterflow Switches
- Valve Tamper Switches
- Fire Pump Supervisory Switches
- Pressure Switches
- Security Dry-Contact Devices
- Four-Wire Smoke Detectors
- Commercial Fire Alarm Systems
Compatibility
Compatible with:
- Fire-Lite Addressable Fire Alarm Control Panels
- LiteSpeed® Signaling Line Circuits
- CLIP Signaling Line Circuits
- ES-50X Fire Alarm Control Panel
- ES-200X Fire Alarm Control Panel
- MS-9050UD Fire Alarm Control Panel
- MS-9200UDLS Fire Alarm Control Panel
- MS-9600UDLS Fire Alarm Control Panel
- Normally Open Dry-Contact Initiating Devices
Always verify compatibility with the installed Fire-Lite fire alarm control panel, SLC protocol, firmware version, and monitored initiating device before installation. The MMF-301 is the compact version of the MMF-300 but supports only Class B wiring and does not include the front-panel LED.
Technical Specifications
Manufacturer: Fire-Lite
Parent Company: Honeywell
Model: MMF-300
Product Type: Intelligent Monitor Module
Circuit Type: Class A (Style D) or Class B (Style B) Initiating Device Circuit
Operating Voltage: 15–32 VDC
Power Source: Signaling Line Circuit (SLC)
Average Operating Current: 350 µA (Direct Poll)
Average Operating Current: 375 µA (Group Poll)
Maximum Operating Current: 600 µA
End-of-Line Resistor: 47 kΩ (Included)
Maximum IDC Wiring Resistance: 1,500 Ω
Addressing: Rotary Decimal Switches
Status Indicator: Green Flash / Red Alarm LED
Operating Temperature: 32°F to 120°F (0°C to 49°C)
Operating Humidity: 10%–93% RH Non-Condensing
Dimensions: 4.5 × 4.0 × 1.25 in. (114 × 102 × 32 mm)
Mounting: 4-Inch Square Electrical Box (2⅛-Inch Minimum Depth)
Application: Indoor Commercial Fire Alarm Systems
Product Status: Discontinued
Listings: UL Listed, ULC Listed, FM Approved, CSFM Listed, and MEA Approved (application dependent).
Applications
The Fire-Lite MMF-300 is designed for commercial fire alarm systems requiring addressable monitoring of conventional dry-contact initiating devices. Typical applications include manual pull stations, sprinkler waterflow switches, valve tamper switches, fire pump supervisory switches, pressure switches, four-wire smoke detector interfaces, and other normally open contact devices installed in offices, schools, hospitals, warehouses, industrial facilities, and other commercial occupancies.





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