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Products Description
Siemens MMB-3 MXL Fire Alarm Main Control Board Unit
Feature & Principle
Core CPU control board for Siemens MXL fire alarm system. It polls intelligent smoke and heat detectors on signal loops, processes fire, trouble and supervisory events. It drives notification appliance circuits for sounder and beacon activation, and communicates with annunciator panel via MNET bus. Onboard auxiliary relays provide dry contact alarm and fault remote feedback.
SpecificationsModel: MMB-3Brand: Siemens / PyrotronicsSystem: MXL fire alarm systemLoop: 2 configurable Class A / Class B notification circuitsCommunication: MNET protocolRelay Output: Common alarm, trouble, supervisory relayProgrammable: Field firmware upgradeMounting: MXL rack chassis
Certification: UL, FM, CE
Components & Diagnostics
Main processor chip, loop driver circuit, relay assembly, MNET communication transceiver, status LED group and backplane connector. Common faults: loop communication loss, relay contact failure, firmware corruption and backplane poor contact.
Product BriefMMB-3 control board, Siemens fire safety spare widely used for commercial building, factory and hospital fire alarm control cabinet.
