Garmin GPSMAP 720 Installation Instructions Manual - page 5
GPSMAP 700 Series Installation Instructions
Connecting the Power/Data Cable to Power
1. Useatestlightoravoltmetertodeterminethepolarityofthevoltagesource.
2. Connectthered(+orpositive)wiretothepositivevoltageterminal.(Ifyouusethe
fuseblockontheboat,routethepositiveconnectionthroughthefuse,asshownonthe
diagram.)
3. Connecttheblack(-orground)wiretothenegativevoltageterminal.
4. Installorcheckthe3Afuse(inthein-linefuseholder,oronthefuseblockoftheboat).
Connecting the Power/Data cable to a NMEA 0183 Device
(optional)
You can connect the GPSMAP 700 series chartplotter to other NMEA 0183-compatible
equipment, such as a DSC or AIS device. Refer to the wiring diagram for connecting the chartplotter to NMEA 0183-compatible devices.
Wiring a GPSMAP 700 Series Chartplotter to a Standard NMEA 0183 Device
+
-
>
>
>
>
Red (power)
Black (ground)
Brown (in)
Blue (out)
Wire color
Power
Power ground
NMEA Ground
NMEA Rx/A (+)
NMEA Tx/A (+)
NMEA 018-compatible
device
GPSMAP 700
series
chartplotter
Battery
10– Vdc
Fuse
A
Wire function
to connect the power/data cable to a NMEA 0183 device:
1. ForGarmindevices,theground(black)wiresserveasNMEA0183groundandmustbeattachedtogetheroronthesameterminalasthe
NMEA 0183 ground on your NMEA 0183 device. Refer to the wiring diagram of your NMEA 0183 device for wire identification.
2. Connecttheblue(NMEA0183port1out)wirefromtheGPSMAP700power/datacabletotheNMEA0183in(orRx/A+)wirefromthe
NMEA0183device,andthebrown(NMEA0183port1in)wiretotheNMEAout(orTx/A+)wirefromtheNMEA0183device.
3. Repeatstep2usingthegray(NMEA0183port2out)andviolet(NMEA0183port2in)wiresforanadditionalNMEA0183device.
4. Settheserialport(orports)onthechartplottertouseNMEA0183data(standardorhigh-speed).SeetheGPSMAP 700 Series Owner’s
Manualformoreinformation.
Connecting the Power/Data Cable to a Lamp or to a Horn (optional)
The GPSMAP 700 series chartplotter can be used with a lamp, a horn, or both, to sound or flash an alert when the chartplotter displays a
message. The alarm does not need to be wired for the chartplotter to function. The alarm circuit switches to a low-voltage state when the alarm
sounds. The maximum current is 100 mA, and a relay is needed to limit the current from the chartplotter to 100 mA. To manually toggle visual
and audible alerts, install single-pole, single-throw switches.
Wiring to a Lamp, a Horn, or Both
+
-
GPSMAP 700 series
chartplotter
Wire
Color
Red (power)
Black (gnd)
Yellow (alarm)
Battery
10– Vdc
Relay
100 ma max
coil current
Horn
Lamp
Fuse
A
Fuse Block Example
—
+
2A
3A
-
+
Boat ground
A fuse
To 10– Vdc boat supply
To device
Fuse Block Example
—
+
2A
3A
-
+
Boat ground
A fuse
To 10– Vdc boat supply
To device