Connection Considerations - Garmin VHF 315 Series Installation Instructions Manual

included screws are not appropriate for the mounting surface,
you must purchase suitable hardware.
Installing the Handset Cradle
You should install the handset connector in the mounting
surface before installing the handset cradle
Handset Connector in the Mounting Surface, page
1
Select a mounting location for the handset cradle near the
handset connector.
TIP: To help determine the best location, you can place the
handset in the cradle, connect the handset to the connector,
and hold it against the mounting surface.
2 Using the cradle as a template, mark the screw locations.
3 Set the cradle aside.
Do not drill through the cradle.
1
4 Using a 3 mm ( / in.) drill bit, drill the pilot holes.
8
5 Using the included M3.5 screws, secure the cradle to the
mounting surface.

Connection Considerations

You must connect the VHF 315 radio to power, to a GHS 11
handset, a VHF antenna, and a GPS source. When making
connections to the device, observe the following considerations.
• You must connect the primary handset (installed in the
wheelhouse or adjacent room, in accordance with FCC law)
to the GHS 11 STATION 1 port.
• You can connect up to three handsets to the radio. You can
purchase additional handsets from your Garmin dealer.
• You can install the included active speaker (optional) in-line
with any handset connected to the radio. You can purchase
additional active speakers from your Garmin dealer.
• You can connect the radio to a GPS source through the
NMEA 2000 ® network or through an external GPS antenna
(not included).
Connecting the Wiring Harness to Power
1
Route the wiring harness 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.
Additional Grounding Considerations
This device should not need any additional chassis grounding in
most installation situations. If interference is experienced, the
grounding screw on the housing can be used to connect the
device to the water ground of the boat to help avoid the
interference.
Connecting a VHF Antenna
1
Mount the VHF antenna (sold separately) according to the
installation instructions provided with the antenna.
2
Connect the VHF antenna to the ANT port on the back of the
device.
Connecting the Active Speaker to the VHF Radio and
Handset
Before you connect the active speaker to the VHF radio and
handset, you should mount the active speaker
Mounting Considerations, page
1
Route the female end of the included extension cable from
the speaker mounting location to the VHF radio.
2 Connect the extension cable to the GHS 11 STATION 1 port
on the VHF radio.
3 Connect the male end of the extension cable to the short
cable from the active speaker.
4
Route the long cable from the active speaker to the handset
connector mounting location.
(Installing the
2).
(Active Speaker
1).
5
If necessary, install the cable from the active speaker in the
mounting surface (Installing the Handset Connector in the
Mounting Surface, page
6
Connect the handset to the long cable from the active
speaker.
Connecting the Handset to the VHF Radio Using an
Extension Cable
If you install an active speaker with the handset, the handset
connects to the radio through the active speaker
the Active Speaker to the VHF Radio and Handset, page
1
Route the female end of the included extension cable from
the handset mounting location to the VHF radio.
2 Connect the extension cable to the GHS 11 STATION 1 port
on the VHF radio.
3
If necessary, install the handset connector on the extension
cable in the mounting surface
Connector in the Mounting Surface, page
4
Connect the handset to the extension cable.
NMEA 2000 Device Connections
If you are connecting this device to an existing NMEA 2000
network, the NMEA 2000 network should already be connected
to power. Do not connect the NMEA 2000 power cable to an
existing NMEA 2000 network, because only one power source
should be connected to a NMEA 2000 network.
If you are connecting this device to an existing NMEA 2000
network or engine network by another manufacturer, you should
install a NMEA 2000 Power Isolator (010-11580-00) between
the existing network and the Garmin devices.
If you are installing a NMEA 2000 power cable, you must
connect it to the boat ignition switch or through another in-line
switch. NMEA 2000 devices will drain your battery if the NMEA
2000 power cable is connected to the battery directly.
To connect this device to your existing NMEA 2000 network, you
must purchase a NMEA 2000 cable and connector.
If you are unfamiliar with NMEA 2000, you should read the
"NMEA 2000 Network Fundamentals" chapter of the Technical
Reference for NMEA 2000 Products. Go to
/manuals/VHF315/.
Item Description
Compatible NMEA 2000 chartplotter or other device
VHF 315 device
Ignition or in-line switch
NMEA 2000 power cable
NMEA 2000 drop cable
12 Vdc power source
NMEA 2000 terminator or backbone cable
2).
(Connecting
(Installing the Handset
2).
NOTICE
www.garmin.com
3).
3