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Garmin GMR 18 Manual

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Garmin Radome Installation Instructions
Cable Runs
Route the cables as needed, depending on the type of mount you are using. It may be necessary to drill 31.7 mm (1.25") holes for routing the
power or network cable. Garmin provides a rubber cable grommet which may be used to cover a cable installation hole. The grommet does
NOT provide a waterproof seal. To waterproof the grommet, apply a marine sealant. Additional cable grommets can be purchased through
Garmin or a Garmin dealer.
When installing the power and network cables, observe the following:
• It is not recommended to cut the RJ-45 marine network cable, but the Garmin radome package includes a eld install kit if it is necessary to
do so. Make sure you save the end you cut. It is important that the wires are connected to the new RJ-45 connector the same way.
• To ensure safety, use the appropriate tie-wraps, fasteners, and sealant to secure the cable along a route and through any bulkhead or deck.
Avoid running the cables near moving objects, high-heat sources, or through doorways and bilges.
• Avoid installing the cables next to or parallel to other cables, such as radio antenna lines or power cables. This is essential to avoid
interference to or from other equipment. If this is not possible, shield the cables with metal conduit or a form of EMI shielding.
• Install the power cable as close to the battery source as possible. A minimum of 10.5 VDC is required during radar turn-on and operation.
Reference the wire gauge table on the previous page when using extended runs of wire between the power cable and the battery.
Final Wiring Connections
Making the nal wiring connections
1. ConnecttheBlackground(-)wiretothevessel’snegativepowerterminal.
2. ConnecttheRedpower(+)wire(withfuseholder)tothevessel’spositivepowerterminal.
Do not cut the fuse holder from the red wire. The fuse holder must remain in place for the Garmin radome to function correctly. Removing
the inline fuse holder may damage your boat's circuitry.
3. Forastand-alonenetwork(chartplotterandradaronly),attachtheRJ-45marinenetworkcabletotheRJ-45socketonthebackofthe
chartplotter.Foranexpandednetwork(chartplotter,radar,GMS10,etc.),attachtheRJ-45marinenetworkcabletoanopenRJ-45socket
ontheGMS10networkportexpander.TightentheRJ-45lockingringclockwiseuntilitisrmlysealed.
If you are using a Garmin GPSMAP 4000 or 5000 series chartplotter, you may not need a GMS 10 network port expander. The GPSMAP 4000
and 5000 series chartplotters have multiple RJ-45 sockets.
Stand-alone Network
Garmin radome
GPS 17/17X
Garmin
Chartplotter
When using the Garmin radome with a stand-alone network, the chartplotter and GPS antenna (GPS 17) must be installed according to their
installation instructions. This diagram only shows how a Garmin radome communicates with a stand-alone network and does not illustrate the full
wiring needs of the chartplotter or GPS 17/17X.
Both the Garmin radome and Garmin chartplotter must be connected to a power source according to their installation instructions. This diagram
only illustrates the network data connections.
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