NMEA 0183 Device Connections
This diagram illustrates two-way connections for both sending and receiving data. You can also use this
diagram for one-way communication. To receive information from a NMEA 0183 device, refer to items ,
,
,
, and
when connecting the Garmin device. To transmit information to a NMEA 0183 device, refer to
items
,
,
,
, and
when connecting the Garmin device.
Item
Description
Power source
Power/NMEA 0183 cable
NMEA 0183 device
Item
Garmin Wire Function
Garmin Wire Color
NMEA 0183 Device Wire Function
Power
Red
Power
Power ground
Black
Power ground
Data ground
Black
Data ground
Rx/A (In +)
Brown
Tx/A (Out +)
Rx/B (In -)
Violet
Tx/B (Out -)
Tx/A (Out +)
Blue
Rx/A (In +)
Tx/B (Out -)
Gray
Rx/B (In -)
If the NMEA 0183 device has only one input (receive, Rx) wire (no A, B, +, or -), you must leave the gray wire
unconnected.
If the NMEA 0183 device has only one output (transmit, Tx) wire (no A, B, +, or -), you must connect the violet
wire to ground.
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