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


Wiring diagram 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

Not applicable

Not applicable

Data ground

Callout number 4

RXA

Brown

TXA

Callout number 5

RXB

Violet

TXB

Callout number 6

TXA

Blue

RXA

Callout number 7

TXB

Gray

RXB

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January 2025