Fire-Lite MMF-300 Monitor Module

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.

Firelite MMF-300