Garmin GPSMAP 620 Installation Instructions - Page 2

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Garmin GPSMAP 620 Installation Instructions
5. Loosely connect the top of the mount base to the swivel fixture with the short knob.
To install the mount bracket on the mount base:
1. Align the slot on the back of the mount bracket ➍ with the long mounting knob ➎ on the mount base, and slide the bracket into place. If
necessary, adjust the mounting knob to spread the mount-base arms apart.
2. Adjust the mount-bracket angle and tighten the long mounting knob until it is snug.
3. Twist the assembled marine mount left or right to rotate and adjust it, then tighten the short knob until snug.
Step 3: Connect the GPSMAP 620/640 Marine-Mount Bracket to Power
•
Connect the cable attached to the GPSMAP 620/640 marine-mount bracket to the power source (from 11 to 32 Vdc) of your boat.
•
If it is necessary to extend the power wires, use 20 AWG wire.
•
If your boat has an electrical system, you might be able to wire the mount bracket directly to an unused holder on your current fuse block. If
you are using the fuse block, remove the supplied in-line fuse holder. You can also wire the mount bracket directly to the battery.
•
Use an AGC/3AG 2.5 A fuse as a replacement, if needed.
Note:
During a typical installation, use only the red and black wires. The other wires on the cable do not have to be connected for normal operation of
the GPSMAP 620/640. For information on connecting to a NMEA 0183-compatible device, see below.
To connect the marine-mount bracket to power:
1. Use a test light or voltmeter to determine the polarity of the voltage source.
2. Connect the red (+ or positive) wire to the positive voltage terminal. If you use the fuse block on the boat, route the positive connection
through the fuse.
3. Connect the black (- or ground) wire to the negative voltage terminal.
4. Install or check the 2.5 A fuse on the fuse block or in the in-line fuse holder.
Optional: Connecting to a NMEA 0183 device
You can connect the GPSMAP 620/640 marine-mount bracket to NMEA 0183-compatible electronic equipment, such as a VHF radio. The
GPSMAP 620/640 has two NMEA 0183 ports, and it can communicate with two NMEA 0183-compatible devices. Refer to the wiring diagram
for connecting the marine-mount bracket to NMEA 0183-compatible devices.
Notes:
•
When wiring NMEA 0183 devices for two-way communication, use the corresponding TX and RX wires for each port. For example, if you
use the port 1 TX wire (yellow), you must also use the port 1 RX wire (blue). Likewise, if you use the port 2 TX wire (brown), you must
also use the port 2 RX wire (white).
•
If the NMEA 0183 device you are wiring only transmits or only receives (one-way communication), connect the appropriate RX or TX wire
from the marine-mount bracket, and leave the other wire on the port unconnected.
•
Refer to the manufacturer's instructions for your NMEA 0183 device for wire identification and configuration information.
•
If it is necessary to extend NMEA 0183 wires, use 28 AWG wire.
GPSMAP 620/640 MArINE-
MOuNT BrACkET
Wiring the GPSMAP 620/640 Marine-Mount Bracket to a NMEA 0183-compatible Device
Optional: Connecting to an External Audio Device
Use the
/
in. (3.5 mm) stereo-audio jack on the GPSMAP 620/640 marine-mount bracket to connect an external
1
8
audio device with a
/
in. (3.5 mm) stereo-audio plug.
1
8
Alternatively, connect an external audio device using the wires on the mount-bracket cable. Refer to the table for
wire colors. If it is necessary to extend the audio-signal wires, use 28 AWG wire.
© 2008 Garmin Ltd. or its subsidiaries
+
BATTEry
11–32 vDC
WIrE
COLOr
FuSE
2.5 A
rED (POWEr)
BLACk (GrOuND)
yELLOW (POrT 1 TX)
Or
BrOWN (POrT 2 TX)
>
BLuE (POrT 1 rX)
Or
WhITE (POrT 2 rX)
>
-
WIrE
rED (POWEr)
BLACk (GND)
NMEA 0183 rX
>
NMEA 0183 TX
>
NMEA 0183-COMPATIBLE
DEvICE
Wire Function
Wire Function
Color
Color
Audio left
Audio left
Violet
Violet
Audio right
Audio right
Orange
Orange
Audio ground
Audio ground
Green
Green
Audio Wire Connections
Audio Wire Connections