Raymarine RAY91 - General Cabling Guidance; Cable Types and Length; Routing Cables; Strain Relief

4.1Generalcablingguidance
Cabletypesandlength
Itisimportanttousecablesoftheappropriatetypeand
length
•Unlessotherwisestateduseonlystandardcablesof
thecorrecttype,suppliedbyRaymarine.
•Ensurethatanynon-Raymarinecablesareofthe
correctqualityandgauge.Forexample,longerpower
cablerunsmayrequirelargerwiregaugestominimize
voltagedropalongtherun.
Routingcables
Cablesmustberoutedcorrectly,tomaximize
performanceandprolongcablelife.
•DoNOTbendcablesexcessively.Whereverpossible,
ensureaminimumbenddiameterof200mm(8in)/
minimumbendradiusof100mm(4in).
•Protectallcablesfromphysicaldamageandexposure
toheat.Usetrunkingorconduitwherepossible.Do
NOTruncablesthroughbilgesordoorways,orclose
tomovingorhotobjects.
•Securecablesinplaceusingtie-wrapsorlacingtwine.
Coilanyextracableandtieitoutoftheway.
•Whereacablepassesthroughanexposedbulkhead
ordeckhead,useasuitablewatertightfeed-through.
•DoNOTruncablesneartoenginesorfluorescent
lights.
Alwaysroutedatacablesasfarawayaspossiblefrom:
•otherequipmentandcables,
•highcurrentcarryingACandDCpowerlines,
•antennae.
Strainrelief
Ensureadequatestrainreliefisprovided.Protect
connectorsfromstrainandensuretheywillnotpullout
underextremeseaconditions.
Circuitisolation
Appropriatecircuitisolationisrequiredforinstallations
usingbothACandDCcurrent:
•Alwaysuseisolatingtransformersoraseparate
power-invertertorunPC’s,processors,displaysand
othersensitiveelectronicinstrumentsordevices.
•AlwaysuseanisolatingtransformerwithWeatherFAX
audiocables.
•Alwaysuseanisolatedpowersupplywhenusinga
3rdpartyaudioamplifier.
•AlwaysuseanRS232/NMEAconverterwithoptical
isolationonthesignallines.
•AlwaysmakesurethatPC’sorothersensitive
electronicdeviceshaveadedicatedpowercircuit.
Cableshielding
Ensurethatallcablesareproperlyshieldedandthatthe
cableshieldingisundamaged.
Dustcaps
Topreventpotentialwateringress,connectorsnotin
useshouldbeprotectedusingthesupplieddustcaps.
Connectionstootherequipment
Requirementforferritesonnon-Raymarinecables
IfyourRaymarineequipmentistobeconnectedtoother
equipmentusingacablenotsuppliedbyRaymarine,
asuppressionferriteMUSTalwaysbeattachedtothe
cableneartheRaymarineunit.
4.2Connectionsoverview
ConnectionConnectsto
Suitable
cables
1
GNSS(GPS)
antenna
connection
PassiveGNSS
antenna
GNSS
antenna’s
fittedcable.
2
Earthstud
DONOT
CONNECT
N/A
3
VHFantenna
connection
VHFantenna
orSplitter
VHF
antenna’s
fittedcable.
4Power
anddata
connection
•12Vdc
power
supply
•NMEA0183
devices
•LoudHailer
•Suitable
power
extension
orcircuit
breaker.
•cable
supplied
withyour
NMEA0183
device
•Loud
hailer’s
fittedcable
26