Garmin 500 Marine GPS System User Manual


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6 GPSMAP 400/500 Series Installation Instructions
Installing the Wiring Harness
The chartplotter comes with a wiring harness that connects the chartplotter to power and to optional NMEA 0183 and Garmin CANet devices.
If applicable, the wiring harness also connects the chartplotter to a transducer.
The wiring harness does not connect to a NMEA 2000 network. For instructions on connecting to a NMEA 2000 network with compatible
devices, see page 8.
GPSMAP 400/500 Series Wiring Harness
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To transducer (if applicable)
Red
Black
Accessory on
Blue
CANet L (if applicable)
CANet H (if applicable)
Alarm low
Wire Color Wire Function
Power (10–32 Vdc*)
Ground
(power and NMEA 0183)
NMEA 0183 port 1 Tx (out)
Brown
Grey
Violet
Green
White
Orange
Yellow
To the GPSMAP 400/500
series chartplotter
Fuse
3 A
NMEA 0183 port 1 Rx (in)
NMEA 0183 port 2 Tx (out)
NMEA 0183 port 2 Rx (in)
Notes:
• UseanAGC/3AG-3Ampreplacementfuse.
• Ifitisnecessarytoextendthepowerandgroundwires,use22AWGwire.
• Youcanwiretheharnessdirectlytothebattery,orifyourboathasanelectricalsystem,youmightbeabletowiretheharnesstoan
unusedholderonthefuseblock.
• Donotcutthetransducercable,becausethisvoidsyourwarranty.
The maximum input voltage is 32 Vdc*. Do not exceed this voltage because this can damage the chartplotter and void the warranty.
: During a typical installation, use only the red and black wires. The other wires do not have to be connected for normal operation of the
chartplotter. For information on connecting to a NMEA 0183- or Garmin CANet-compatible device, see page 8.
Connecting the Wiring Harness 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,asshownonthe
diagram.)
3. Connecttheblack(-orground)wiretothenegativevoltageterminal.
4. Installorcheckthe3Afuse(inthein-linefuseholder,oronthefuseblockoftheboat).
Fuse Block Example
—
+
Boat ground
3 A fuse
To 10–32 Vdc* boat supply
To device
* Certain GPSMAP 400/500 series chartplotters can be connected to higher-voltage power sources. Refer to the Power section of the System Specications
on page 10 for more information.
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