Raymarine p70Rs - Seatalkng Product Loading; Seatalkng Power Connection Point; In-Line Fuse and Thermal Breaker Ratings

TheSea
Talkng®powercable(A06049)isusedtoconnecttheSeaTalkngbackbonetoyourchosen
12Vdcpowersupply.
SeaTalkng®productloading
ThenumberofproductsthatcanbeconnectedtoaSeaTalkng®backbonedependsonthecurrent
drawofeachproductandthephysicallengthofthebackbonecabling.
NMEA2000LoadEquivalencyNumbers(LEN)areusedtoexpresstheamountofcurrentthatis
drawnfromSeaTalkng®products(1LEN=50mA)TheLENforeachproductcanbefoundinthe
product’sT echnicalSpecification.
LENsareusedtodeterminethepowerconnectionpointfortheSeaTalkng®backbone.
SeaTalkng®powerconnectionpoint
The12VdcpowersupplyisconnectedtoaspurconnectionontheSeaTalkng®backbone.
Largesystems
Ifthebackbonelengthisgreaterthan60m(197ft),thepowerconnectionpointshouldbeconnected
atapointthatcreatesabalancedcurrentdrawfromeachsideofthebackbone.TheNMEA2000
LoadEquivalencyNumber(LEN)isusedtodeterminethepowerconnectionpointforthebackbone.
Inthee xampleabovethebackbonehasanoverallLENof10,sotheoptimumconnectionpointwould
betohave5LENeithersideoftheconnectionpoint.
Smallsystems
Ifthebackbonelengthis60m(197ft)orless,thepowerconnectionpointmaybeconnectedat
anypointinthebackbone.
In-linefuseandthermalbreakerratings
TheSeaTalkng®network’spowersupplyrequiresanin-linefuseorthermalbreakertobefitted.
•In-linefuserating:5A
•Thermalbreakerrating:3A(refertonotebelow)
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