Simrad ST90 - Page 27

442703/B
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TwohighcapacityEthernetcablesconnecttheProcessorUnittotheTransceiverUnit.
AnotherhighqualityEthernetcableisusedtoconnecttheTransceiverUnittotheMotor
ControlUnitonthehullunit.Itisveryimportantthathigh-qualityEthernetcablesare
used.Y oumustuseCA T-5ESTP(ShieldedTwistedPair)qualityorbetter.Ifyouuse
cableswithlowerbandwidthcapacityyouwillreducetheST90performance.Donot
connecttheProcessorUnittotheTransceiverUnitusinganexistinglocalareanetwork
(LAN).
Tip
WestronglyrecommendthatminimumthreeEthernetcablesareinstalledbetweenthe
sonarroomandthebridge.Twocablesareforoperationaluse,whiletheothersare
spare.
Thetransducercablesarepluggedintothesidewallofthetransceivercabinetusinga
specialconnector.Theconnectorsforpowerandinterfacesarelocatedatthebottom
ofthecabinet.
Note
ToextendthelifetimeoftheST90TransceiverUnit,itmustbemountedatdryandclean
locationwithsufcientventilation.Observethesonarroomrequirements
TheTransceiverUnitisttedwithacommercialheatexchanger.Thepurposeoftheheat
exchangeristoprovideastable,cleanandtemperaturecontrolledenvironmentforthe
electroniccircuitryinsidetheTransceiverUnit.Theheatexchangeralsoinhibitsdust
anddirtparticlesfromenteringtheTransceiverUnit.Theheatexchangerispowered
from230V ACusingaseparateoutlet.
Relatedtopics
Systemunits,page23
Scopeofsupply,page32
InstallingtheTransceiverUnit,page153
Technicalspecications,page388
381457TransceiverUnitdimensions,page421
SimradST90