The MR-2900 fire alarm system control unit is the heart of a  sophisticated microprocessor-based fire alarm system. With the capability of networking, the MR-2900 is ideally suited for the  varied needs of residential, commercial, industrial, and institutional applications. The MR-2900 provides both conventional and  addressable input circuits. It has the ability to 'software' configure conventional input circuits for alarm or supervisory function, and operation with contact devices only, smoke detectors only, or both smoke detectors and contact devices with the system having the  ability to differentiate between smoke detector and contact device activation. Addressable input circuits using addressable analog detectors, monitoring modules, and control modules are available using addressable input circuit modules.

The MR-2900 has capacity for up to 24 input circuits, 4 general  purpose FormC relays, and 8 polarity reversing notification  appliance (bell) circuits. System operated relays are available for alarm, trouble, and supervisory indication. 

 Input circuit modules are available for conventional circuits and addressable circuits. The MR-2908 and MR-2928 conventional input circuit modules each have 8 ClassB circuits which can be wired for ClassA by utilizing two circuits. The MR-2938 conventional input circuit module supports 4 StyleD (ClassA) smoke detector circuits. The MR-2909 addressable input circuit module supports 8 Style4 (ClassB) circuits. The MR-2919 addressable input circuit module supports 4 Style6 (ClassA) circuits. The first 8 circuits of the  MR-2900 control unit are reserved for conventional circuits  while the remaining 16 circuits can be used for addressable or  conventional input circuits in groups of 8.

With the addition of MR-2910 Series network boards, MR-2900  control units can be networked together to provide additional input circuits, visual zones, programmable notification appliance (bell)  circuits, and relays. Up to 254 control and annunciator units can be  networked together. The network is a Style7 (DCLR) loop layout.

Each annunciator can contain up to 576 LEDs (192 zones) for  annunciation purposes, an LCD display for messages, and 16 predefined switch inputs for control functions.

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UL, ULC, CSFM, and MEA Listed
UL Central Station Connection
UL and ULC Networking
UL and ULC Listed for Releasing Service
CSFM High Rise Listed
FM Approved
UL Remote Station listing pending
5 year warranty
Sophisticated capabilities yet simple to operate
Conventional and addressable detection circuits
Adjustable sensitivity
Day/night sensitivity
Two-stage alarm capability
One-person system test capability
Totally software driven
Field programmable via PC
Passcode protection
History log ≈≈900 events
System alarm, supervisory, and trouble relays
Alarm, supervisory, and trouble LEDs for each zone
Custom labels per zone
Remote alarm and trouble annunciation
Remote detector test capability
LCD supertwist 80 character (4 x 20) backlit display
Sprinkler supervision
Ground fault indication by supervised circuit
Cross-zoned releasing circuit
Software definable conventional input circuits
Conventional input circuits StyleB (ClassB) or StyleD (ClassA)
Addressable input circuits Style4 (ClassB) or Style6 (ClassA)
Input circuits programmable for N.O. or N.C. contacts
StyleY (ClassB) or StyleZ (ClassA) notification appliance  (bell) circuits
Power limited circuits
Style7 (DCLR) network communication option
Optional integrated strip printer
'Hot Key' system controls 
Display of real time
Signal silence inhibit 
Signal time limit cut-out
Alarm verification by zone or device