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Item Garmin Wire
Function
Garmin Wire
Color
NMEA 0183
Device Wire
Function
Ì
RXB Violet Not applicable
Í
RXA Brown TX
Î
TXA Blue RX
Ï
TXB Gray N/A
If the NMEA 0183 device has only one input (receive, RX)
wire (no A, B, +, or -), you must leave the TXB wire
unconnected.
If the NMEA 0183 device has only one output (transmit, TX)
wire (no A, B, +, or -), you must connect the RXB wire to
ground.
NMEA 0183 Device Connected with a Single Receive Wire
In this example, the NMEA 0183 device is receiving data from
the chartplotter.
Item Description
À
Power source
Á
Power/NMEA 0183 cable
Â
NMEA 0183 device
Item Garmin Wire
Function
Garmin Wire
Color
NMEA 0183 Device
Wire Function
Ê
Power Red Power
Ë
Power ground Black Power ground
Ì
TXA Blue RXA
Í
TXB Gray Not applicable
NMEA 0183 Device Connected with a Single Transmit Wire
In this example, the NMEA 0183 device is sending data to the
chartplotter.
Item Description
À
Power source
Á
Power/NMEA 0183 cable
Â
NMEA 0183 device
Item Garmin Wire
Function
Garmin Wire
Color
NMEA 0183 Device
Wire Function
Ê
Power Red Power
Ë
Power ground Black Power ground
Ì
RXB Violet Not applicable
Í
RXA Brown TXA
NMEA 0183 and Power Cable Pinout
Wire Function Wire Color Pin Number
NMEA RXA Brown
Â
NMEA TXA Blue
Ã
NMEA RXB Violet
Æ
NMEA TXB Gray
À
Alarm Yellow
Ä
Accessory on Orange
Ç
Ground (shield) Black
Á
VIN Red
Å
Lamp and 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 1 A, and a relay is needed to limit
the current from the chartplotter to 1 A.
To manually toggle visual and audible alerts, you can install
single-pole, single-throw switches.
Item Description
À
Power source
Á
Power cable
Â
Horn
Ã
Lamp
Ä
Relay (1 A 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
Composite Video Considerations
This chartplotter allows video input from composite video
sources using the port labeled CVBS IN. When connecting
composite video, you should observe these considerations.
The CVBS IN port uses a BNC connector. You can use a
BNC to RCA adapter to connect a composite-video source
with RCA connectors to the CVBS IN port.
Video is shared across the Garmin Marine Network, but it is
not shared across the NMEA 2000 network.
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