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.