Life Safety

System Specialists

  • Analogue Fire Detection
    Syncro ASSyncro AS ListecSyncroSyncro ViewSyncro MatrixSyncro IdentSyncro ModulesMulti Input/ Output UnitsSyncro I/O Boards & EnclosuresSyncro GUIDE
  • Conventional Fire Detection
    Sigma CPSigma CP-ASigma CP-RSigma CP AncillariesSigma MatrixK3000 SeriesLCMU
  • Extinguishant Control Panels
    Sigma XTSigma XT+Sigma XT+ CoincidenceSigma SiSigma XT Keyswitches & AncillariesSyncro XT+Syncro Si
  • Power Supplies & Battery Chargers
    Power Supplies & Battery Chargers2.5 & 5.25Amp PSUs10.25Amp PSU
  • Miscellaneous
    Sigma DocBoxTamper Resistant Vision WindowWarning signsRemote Isolate/ Audio VisualRemote Indicator UnitsWater DetectionSyncro As Printer Enclosure
  • UL/ FM Approved Panels
    Analogue Addressable Control PanelsEliteElite RSeVieweMatrixeNet16 Channel IO BoardConventional Control PanelsSigma A-CPSigma A-CP AnnunciatorExtinguishant Control PanelsSigma A-XTSigma A-Si Sigma A-XT Keyswitches & AncillariesPower Supplies10.25Amp PSU
  • Custom Engineered Solutions
  • Marine
    Syncro ASMSyncro View MarineSyncro ASM Voyage Data Recorder (VDR)

LCMU

Line Continuity Monitoring Circuit

  • To use this method of monitoring, the breaking connection of the detector base must be fitted with a diode. To ensure correct operation over a wide supply voltage range and with up to 20 detectors removed, a Schottky type BYV-1060 is recommended. These devices are, however, very sensitive to electrostatic discharge and extra care should be taken when handling or cable testing.
  •  It is also necessary to fit a 47uF capacitor to the detection line terminals on some of the control panels (not K3000 series or Sigma CP). Extreme care should be taken when fitting the capacitor in the panel as they are polarity conscious. The LCMU itself is also polarity conscious and the polarity is indicated in the normal manner i.e. black wire is always negative. A wrongly connected LCMU will produce a short circuit fault condition.
  • Due to the use of surface mount technology components, the LCMU is probably the smallest device of its kind on the market. This enables the device to be fitted either within the last device on a zone or in the back box, eliminating the need for an additional wiring point.

Documentation

  • Data Sheet

    DS20 Data Sheet
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Questor, Dartford,

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