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 Callout number 1, Callout number 2, Callout number 3, Callout number 4, and Callout number 5 when connecting the Garmin® device. To transmit information to a NMEA 0183 device, refer to items Callout number 1, Callout number 2, Callout number 3, Callout number 6, and Callout number 7 when connecting the Garmin device.


Wiring diagrams with callouts

Item

Description

Callout number 1

Power source

Callout number 2

Power/NMEA 0183 cable

Callout number 3

NMEA 0183 device

Item

Garmin Wire Function

Garmin Wire Color

NMEA 0183 Device Wire Function

Callout number 1

Power

Red

Power

Callout number 2

Power ground

Black

Power ground

Callout number 3

Data ground

Black

Data ground

Callout number 4

Rx/A (In +)

Brown

Tx/A (Out +)

Callout number 5

Rx/B (In -)

Violet

Tx/B (Out -)

Callout number 6

Tx/A (Out +)

Blue

Rx/A (In +)

Callout number 7

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.

GUID-BF2FF273-008A-482A-A96F-362ADA8996BA v6
February 2024