Garmin 7-Pin Power/Data Cable, For GMI 20/GHC 20, 90° Connector

Overview

The Garmin 010-11129-00 is a 7-pin power/data cable with a 90-degree connector used to wire compatible Garmin instruments to a NMEA 0183 device while also bringing in DC power. The right-angle plug helps when the instrument is flush-mounted and you have limited clearance behind the panel.

This cable is typically used during installs and refits where a Garmin GMI or GHC head needs to talk to existing NMEA 0183 equipment. It keeps the connection at the instrument tidy and reduces stress on the plug in tight helm pods and instrument clusters.

Key features

• 7-pin power/data interface with a 90-degree connector to help with tight behind-the-dash installs and flush mounts
• Supports NMEA 0183 wiring for data connections alongside power in a single run to the instrument
• Compatible with Garmin GHC 20, GMI 20, GNX 20, and GNX 21 marine instruments
• Useful for clean cable routing where the connector needs to turn immediately after the back of the unit

Compatibility and fit

Use this cable with Garmin devices that accept the 7-pin power/data connector, including GHC 20, GMI 20, GNX 20, and GNX 21. It is intended for NMEA 0183 connections, so confirm your target device is an NMEA 0183 talker or listener and that you have access to its signal and ground wiring.

Installation and setup

Plan your routing so the 90-degree connector exits in the direction that best matches your available space behind the mounting surface. Leave enough slack to service the instrument later, and secure the harness so vibration does not work the connector loose over time.

In wet locations, route the cable with a drip loop and keep any splices or terminal blocks out of splash zones. Avoid running NMEA 0183 signal conductors alongside high-current DC runs for long distances to reduce the chance of noise getting into the data lines.

Electrical and system integration

This cable is used to bring vessel DC power to the instrument and to connect NMEA 0183 data lines to another device. Follow the wiring diagrams for both ends so polarity and talker/listener connections are correct, and protect the power feed with the fuse rating specified for the connected Garmin instrument.

Use cases on board

This is a good match for helm upgrades where you are keeping legacy NMEA 0183 gear and want a clean connection to a Garmin instrument head. It is also helpful on compact consoles and sailboat pods where the space behind the panel makes a straight connector hard to fit.

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