Simrad TRANSDUCER - INSTALLATION GENERIC REV H Manuale di Installazione Pagina 56

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SimradMS70
AboutthePowerSupplyUnit
TheSimradMS70comprisesthreePowerSupplyUnits.EachunitprovidesACandDC
powertooneofthethreetransceiverracksinthetransceiver.Externalanaloguepower
supplieshavebeenchosentoensureminimumelectricnoise.
InordertoreducethevoltagedropinthepowercablesbetweeneachPowerSupplyUnit
andtheTransceiverUnit,thesecablesmustbekeptasshortaspossible.Thecablesmust
alsoberuninsteelconduitstominimizeelectricnoise.
ThemainactivecomponentsineachPowerSupplyUnitare:
OneInternetPowerSwitch
Onepowersupply,6Vdc
Onepowersupply,12Vdc
Onepowersupply,75Vdc
PowerSupplyUnitpreparations
BeforethePowerSupplyUnitsaremounted,observethefollowingprocedure.
Figure17PowersupplyUnit
ventilation;airow
Installationmethods
Eachcabinetcanbeinstalled
“stand-alone”,sidebysideorontopof
eachother.Makesurethatenoughspace
isprovidedbetweenthecabinetsto
allowforventilation,maintenanceand
partsreplacements.
Thethreecabinetscanbeinstalled
togetheronadedicatedframe.Thisisan
option,andtheframemustbeordered
separately.Theframeismounted
verticallyonthebulkheadbymeansof
shockabsorbers.
Procedure
1Observetheoutlinedimensions
drawingandthedetailsregardingthePowerSupplyUnit’sfootprint.
PowerSupplyUnitoutline(311237)onpage181
PowerSupplyUnitmountingframe(308337)onpage183
2Decidewhichofthetwoinstallationmethodsthatwillbeused.
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