Raymarine i70 - Seatalkng Power Supply; Seatalkng Power Connection Point; In-Line Fuse and Thermal Breaker Ratings; Seatalkng System Loading

4.3SeaTalkng®powersupply
PowerissuppliedtotheproductovertheSeaTalkng®
backbone.
ASeaTalkng®backbonerequiresone12Vdcpower
supply,connectedtotheSeaT alkng®backbone.
Thiscanbeprovidedby:
•abattery
(1)
,viathedistributionpanel,
•anAutopilotControlUnit(ACU)
(2)
,
•anSPXcoursecomputer
(2)
,
•for24Vvesselsa5amp,regulated,continuous
24Vdcto12Vdcconverterisrequired.
Note:
•(1)Thebatteryusedforstartingthevessel’s
engine(s)shouldNOTbeusedtopowerthe
SeaTalkng®backboneasthiscancausesudden
voltagedrops,whentheenginesarestarted.
•(2)TheACU-100andSPX-5cannotbeusedto
powertheSeaT alkng®backbone.
SeaTalkng®powerconnectionpoint
Smallsystems
Ifthebackbonelengthis60m(197ft)orless,the
powerconnectionpointmaybeconnectedatany
pointinthebackbone.
Largesystems
Ifthebackbonelengthisgreaterthan60m(197ft),
thepowerconnectionpointshouldbeconnectedat
apointthatcreatesabalancedcurrentdrawfrom
eachsideofthebackbone.TheLoadEquivalency
Number(LEN)isusedtodeterminethepower
connectionpointforthesystem.
IntheexampleabovethesystemhasanoverallLEN
of10,sotheoptimumconnectionpointwouldbeto
have5LENeithersideoftheconnectionpoint.
In-linefuseandthermalbreaker
ratings
TheSeaT alkng®network’spowersupplyrequiresan
in-linefuseorthermalbreakertobetted.
In-linefuseratingThermalbreakerrating
5A
3A(ifonlyconnectingone
device)
Note:Thesuitablefuseratingforthethermal
breakerisdependentonthenumberofdevicesyou
areconnecting.Ifindoubtconsultanauthorized
Raymarinedealer.
SeaTalkng®systemloading
Themaximumloading/LENforaSeaT alkng®
systemdependsonthelengthofthebackbone.
LoadingtypeBackbonelengthTotalLEN
Unbalanced
20m(66ft)
40
Unbalanced
40m(131ft)
20
Unbalanced
60m(197ft)
14
Balanced
60m(197ft)or
less
100
Balanced
80m(262ft)
84
Balanced
100m(328ft)
60
Balanced
120m(394ft)
50
Balanced140mto160m
(459ftto525ft)
40
Balanced180mto200m
(591ftto656ft)
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Powerdistribution—SeaTalkng®
Recommendationsandbestpractice.
•OnlyuseapprovedSeaT alkng®powercables.Do
NOTuseapowercabledesignedfor,orsupplied
with,adifferentproduct.
•Seebelowformoreinformationonimplementation
forsomecommonpowerdistributionscenarios.
Important:Whenplanningandwiring,takeinto
considerationotherproductsinyoursystem,some
ofwhich(e.g.sonarmodules)mayplacelarge
powerdemandpeaksonthevessel’selectrical
system.
Note:Theinformationprovidedbelowisfor
guidanceonly,tohelpprotectyourproduct.It
coverscommonvesselpowerarrangements,but
doesNOTcovereveryscenario.Ifyouareunsure
howtoprovidethecorrectlevelofprotection,
pleaseconsultanauthorizedRaymarinedealeror
asuitablyqualiedprofessionalmarineelectrician.
Implementation—directconnectiontobattery
•SeaTalkng®powercablesmaybeconnected
directlytothevessel'sbattery,viaasuitablyrated
fuseorbreaker.
Cablesandconnections
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