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 one, Callout number two, Callout number three, Callout number four, and Callout number five when connecting the Garmin® device. To transmit information to a NMEA 0183 device, refer to items Callout number one, Callout number two, Callout number three, Callout number six, and Callout number seven when connecting the Garmin device.


NMEA 0183 connections with callouts

Item

Description

Callout number one

Power source

Callout number two

Power cable

Callout number three

NMEA 0183 device

Callout number four

NMEA 0183 cable

Item

Garmin Wire Function

Garmin Wire Color

NMEA 0183 Device Wire Function

Callout number one

Power

Red

Power

Callout number two

Power ground

Black

Power ground

Callout number three

Data ground

Black

Data ground

Callout number four

Rx/A (In +)

White/orange

Tx/A (Out +)

Callout number five

Rx/B (In -)

White

Tx/B (Out -)

Callout number six

Tx/A (Out +)

Gray

Rx/A (In +)

Callout number seven

Tx/B (Out -)

Pink

Rx/B (In -)

If the NMEA 0183 device has only one input (receive, Rx) wire (no A, B, +, or -), you must leave the pink wire unconnected.

If the NMEA 0183 device has only one output (transmit, Tx) wire (no A, B, +, or -), you must connect the white/orange wire to ground.

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