Raymarine RAY91 - EMC Installation Guidelines

3.
1Selectingalocation
W
arning:Potentialignitionsource
ThisproductisNO
Tapprovedforuseinhazardous/flammableatmospheres.Do
NOTinstallinahazardous/flammableatmosphere(suchasinanengineroom
ornearfueltanks).
Generallocationrequirements
Whenselectingalocationfortheunititisimportanttoconsideranumberoffactors.
T
oensureoptimumperformance,itisrecommendedthatthedisplayistemporarilypoweredupand
tested,atthechosenlocation,priortoinstallation.
Ventilationrequirements
Toprovideadequateairflow:
•Ensurethatequipmentismountedinacompartmentofsuitablesize.
•Ensurethatventilationholesarenotobstructed.
•Ensureadequateseparationofequipment.
Mountingsurfacerequirements
Whenselectingamountingsurfaceensure:
•theproductwillbeadequatelysupportedonasecure,flatsurface.DoNOTmountunitsorcut
holesinplaceswhichmaydamagethestructureofthevessel.
•sufficientspaceisavailablearoundtheproduct.
•thereisnothingbehindthemountingsurfacethatmaybedamagedwhendrilling.
Cableroutingrequirements
Ensureyouhaveidentifiedtheroutethatallrequiredcableswilltakeandthatsufficientspaceis
availabletoallowconnectionofcables:
•Unlessotherwisestated,aminimumcablebendradiusof100mm(3.94in)isrequired.
•Wherenecessary,cablesupportsshouldbeusedtopreventstressonconnectors.
Electricalinterference
Selectalocationthatisfarenoughawayfromequipmentthatmaycauseinterference,suchas
motors,generatorsandradiotransmitters/receivers.
Powersupply
Selectalocationthatisascloseaspossibletothevessel’sDCpowersupply.Thiswillhelpto
keepcablerunstoaminimum.
RFinterference
Certainthird-partyexternalelectricalequipmentcancauseRadioFrequency(RF)interferencewith
GNSS(GPS),AISorVHFdevices,iftheexternalequipmentisnotadequatelyinsulatedandemits
excessivelevelsofelectromagneticinterference(EMI).
SomecommonexamplesofsuchexternalequipmentincludeLEDlighting(e.g.:navigationlights,
searchlightsandfloodlights,interiorandexteriorlights)andterrestrialTVtuners.
Tominimizeinterferencefromsuchequipment:
•KeepitasfarawayfromGNSS(GPS),AISorVHFproductsandtheirantennasaspossible.
•Ensurethatanypowercablesforexternalequipmentarenotentangledwiththepowerordata
cablesforthesedevices.
•ConsiderfittingoneormorehighfrequencysuppressionferritestotheEMI-emittingdevice.The
ferrite(s)shouldberatedtobeeffectiveintherange100MHzto2.5GHz,andshouldbefitted
tothepowercableandanyothercablesexitingtheEMI-emittingdevice,ascloseaspossibleto
thepositionwherethecableexitsthedevice.
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