Connection Considerations
NOTICE
A blue rubber seal is included for each DVI port on the device.
This seal must be installed between each DVI port and DVI-
cable connector to avoid damage to the connectors.
When connecting the GPSMAP 8500 to power, to a GMM, and
to other Garmin devices, observe the following considerations.
• Although it is recommended to use the Garmin provided DVI-
D cables, high-quality third-party DVI-D cables may be used.
You should test the DVI-D cable by connecting the devices
before routing the cable.
• The GPSMAP 8500 should be connected to the same power
source as a connected GMM and GRID. If this is not
possible, the devices must be connected to the same
ground.
• You should make sure that the power and ground
connections to the battery are secured and will not become
loose.
• The GPSMAP 8500 can be controlled by touchscreen using
one of the possible two connected GMM devices.
◦ The GMM used to control the GPSMAP 8500 must be
connected to both the GARMIN MONITOR and MAIN
DVI-I VIDEO ports on the GPSMAP 8500 using a Garmin
Marine Network cable and a DVI-D cable.
◦ A GMM or other display connected to the MIRROR DVI-I
VIDEO OUT port will show the same image displayed on
the main GMM, but will not allow touchscreen control.
• Garmin Marine Network devices can be connected to any of
the NETWORK ports, except for the GARMIN MONITOR
port, which is reserved for use with the primary GMM.
• For easer cable routing, the power, NMEA
®
0183, and
Garmin Marine Network cables are packaged without the
locking rings installed. You should route the cables before
you install the locking rings.
• After connecting a locking ring to a cable, make sure the ring
is securely connected and the o-ring is in place so the power
or data connection remains secure.
Station Connection Considerations
This device can be set up in conjunction with other compatible
Garmin devices to work together as a station. When planning
stations on your boat, observe these considerations.
• Devices prior to the GPSMAP 8000 series and GPSMAP
8500 cannot be used in a station.
• Although it is not necessary, it is recommended that you
install all of the devices you plan to use in one station near
each other.
• No special connections are necessary to create a station, as
long as all of the devices are connected to the Garmin
Marine Network (
).
• Stations are created and modified using the device software.
See the owner's manual provided with the device for more
information.
Connecting to Power
WARNING
When connecting the power cable, do not remove the in-line
fuse holder. To prevent the possibility of injury or product
damage caused by fire or overheating, the appropriate fuse
must be in place as indicated in the product specifications. In
addition, connecting the power cable without the appropriate
fuse in place will void the product warranty.
1
Route the power cable to the power source and to the
device.
2
Connect the red wire to the positive (+) battery terminal, and
connect the black wire to the negative (-) battery terminal.
3
Install the locking ring and o-ring on the end of the power
cable.
4
Connect the power cable to the device by turning the locking
ring clockwise.
Power Cable Extensions
If necessary, the power cable can be extended using the
appropriate wire gauge for the length of the extension.
Item
Description
À
Fuse
Á
Battery
Â
6 ft. (1.8 m) no extension
Item Description
À
Splice
Á
• 12 AWG (3.31 mm²) extension wire, up to 15 ft. (4.6 m)
• 10 AWG (5.26 mm²) extension wire, up to 23 ft. (11 m)
• 8 AWG (8.36 mm²) extension wire, up to 36 ft. (11 m)
Â
Fuse
Ã
8 in. (20.3 cm)
Ä
Battery
Å
8 in. (20.3 cm)
Æ
36 ft. (11 m) maximum extension
Additional Grounding Considerations
This device should not need any additional chassis grounding in
most installation situations. If interference is experienced, the
included grounding screw
À
can be used to connect the device
to the water ground of the boat to help avoid the interference.
Connecting a GMM to the GPSMAP 8500
One GMM can connect to the GPSMAP 8500 with touchscreen
control, and an additional GMM or third-party display can be
connected to the GPSMAP 8500 to mirror the primary display.
NOTE:
These instructions only cover the video and data
connections of the GMM and third-party display. Consult the
instructions provided with your GMM and third-party display for
information regarding power connections.
1
Route a Garmin Marine Network cable and a DVI-D cable to
the primary GMM and the GPSMAP 8500.
2
Route a DVI-D cable to an additional GMM or an appropriate
cable to a third-party display (optional).
4
