Garmin GMR 24 xHD, GMR 24 HD, GMR 18, GMR 18 HD Install Instructions
Marine Ethernet Installation
Instructions
The Garmin Marine Network is an Ethernet network used to
share data such as radar, sonar, and detailed mapping. You
can modify the Ethernet cable to suit your installation needs. To
obtain the best performance and to avoid damage to your boat,
install the connector according to these instructions. Read all
installation instructions before proceeding with the installation. If
you experience difficulty during the installation, contact Garmin
Product Support.
Contacting Garmin Product Support
• Go to www.garmin.com/support and click Contact Support
for in-country support information.
• In the USA, call (913) 397.8200 or (800) 800.1020.
• In the UK, call 0808 2380000.
• In Europe, call +44 (0) 870.8501241.
Important Safety Information
WARNING
See the Important Safety and Product Information guide in the
product box for product warnings and other important
information.
CAUTION
Always wear safety goggles, ear protection, and a dust mask
when drilling, cutting, or sanding.
NOTICE
When drilling or cutting, always check what is on the opposite
side of the surface.
Preparing the Network Cable
Cleanly cut the Ethernet cable À to the needed length.
1
NOTE: Retain the connector for use in step 4.
NOTE: As a point of reference, the brown wire will always be
in position 8.
NOTE: The Garmin Marine Network requires cross-over
cables not exceeding 100 m between devices.
Using a sharp knife, insert the blade between the cable
5
shield and jacket, and slit the jacket 16 mm (5/8 in.) from the
cut end of the cable.
Peel the jacket back and remove the slit portion.
6
Trim the drain wire à to approximately 14 mm (9/16 in.) and
7
fold the drain wire back over the jacket.
Arrange the individual wires in order according to table
8
shown in step 4.
NOTE: When constructing a custom cable from bulk wire,
you must create both a side A and a side B.
Trim the wires to an even length, leaving approximately
9
14 mm (9/16 in.) from the ends of the wires to the jacket edge.
Wrap the supplied copper tape around the drain wire and
10
jacket.
Using a pair of pliers, squeeze the copper tape to pre-form
11
the cable jacket end.
Installing the Network Connector
With the wires in the correct order, insert the wires into the
1
modular plug until the ends of the wires touch the bottom of
the plug.
Verify the wires are in the correct order.
2
If any wire is not in the correct position, remove the plug,
3
arrange the wires in the correct order, and reinsert the wires
into the plug.
Using a modular plug hand tool, crimp the plug onto the
4
wires.
Align the release tab on the modular plug with the
5
corresponding notch in the cable-connection housing, and
push the cable through the connection housing until plug is
securely seated.
Screw the strain relief nut onto the cable-connection housing
6
and tighten with a 15 mm wrench.
NOTE: Do not overtighten the nut.
Install the O-ring onto the housing.
7
The cable is now ready for use.
Remove the strain-relief nut Á from the cable-connection
2
housing  and slide the nut onto the cut end of the Ethernet
cable.
Feed the cut cable end through the connection housing.
3
Examine the connector removed from the cable and
4
compare it to this table to determine whether cable side A or
cable side B was removed.
Position Side A Side B
1 White/Orange White/Green
2 Orange Green
3 White/Green White/Orange
4 Blue Blue
5 White/Blue White/Blue
6 Green Orange
7 White/Brown White/Brown
8 Brown Brown
April 2014
190-00489-00_0C Printed in Taiwan
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