Garmin GPSMAP 751 - NMEA 2000 Considerations

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Item Description
À
12 Vdc power source
Á
Wiring harness
Â
NMEA 0183-compliant device
Item Garmin Wire
Function
Garmin Wire
Color
NMEA 0183
Device Wire
Function
Ê
Power Red Power
Ë
Ground Black Data ground
Ï
Tx Blue Rx/A (+)
Í
Rx Brown Tx/A (+)
Lamp or Horn Connections
The device can be used with a lamp, a horn, or both, to sound
or flash an alert when the chartplotter displays a message. This
is optional, and the alarm wire is not necessary for the device to
function normally. When connecting the device to a lamp or
horn, observe these considerations.
• 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, you can install
single-pole, single-throw switches.
Item Description
À
10–35 Vdc power source
Á
Power cable
Â
Horn
Ã
Lamp
Ä
Relay (100 mA coil current)
Å
Toggle switches to enable and disable lamp or horn alerts
Item Wire Color Wire Function
Ê
Red Power
Ë
Black Ground
Ì
Yellow Alarm
NMEA 2000 Considerations
NOTICE
If you have an existing NMEA 2000 network on your boat, it
should already be connected to power. Do not connect the
included 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 installing the included 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.
NMEA 2000 compatible models can connect to a NMEA 2000
network on your boat to share data from NMEA 2000
compatible devices such as a VHF radio. The necessary NMEA
2000 cables and connectors are sold separately.
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