Garmin 7-pin Data Cable with 90-degree Connector

The Garmin 7-Pin Data Cable with 90-degree Connector (Part Number 010-11129-00) is an essential accessory for networking compatible Garmin marine instruments with an existing NMEA 0183 system. This specialized cable provides both power and data connectivity, featuring a unique 90-degree connector that is designed for installation flexibility, particularly in tight spaces or for a clean flush-mount setup. It is the preferred cable for connecting devices such as the GMI 20 Marine Instrument, GHC 20 Marine Autopilot Control Unit, and the GNX 20/21 Marine Instruments to a NMEA 0183 data source or device. The opposite end of the cable includes bare wires, allowing for customized hard-wire installation into the vessel’s NMEA 0183 network and power supply.

Technical Specification

General Specifications

Garmin Part Number (PN): 010-11129-00
Type: Power/Data Cable (used primarily for NMEA 0183 data networking on modern compatible devices).
Device Connector Type: Circular, 7-pin male connector.
Connector Angle: 90-degree (right-angle), designed for flush mounting or installation in confined areas.
Termination End: Bare wires for connection to power and NMEA 0183 equipment.

Data and Compatibility

Protocol Support: NMEA 0183 (Input/Output).
Primary Compatibility: Garmin marine instruments that use a 7-pin port for data/power, including:
- GHC™ 20 Marine Autopilot Control Unit
- GMI™ 20 Marine Instrument
- GNX™ 20 Marine Instrument
- GNX™ 21 Marine Instrument

Pin/Wire Function	Typical Purpose	Note
Power (Red)	Primary Power Input ( $V_{in}$ )	Caution: Not used for power on NMEA 2000-powered devices (like the GHC 20).
Ground (Black)	Power and Data Ground (Shield)	Connects to system ground.
NMEA 0183 Tx/A (Out +)	Data Output Positive	Sends data from the Garmin device.
NMEA 0183 Tx/B (Out -)	Data Output Negative	Sends data from the Garmin device.
NMEA 0183 Rx/A (In +)	Data Input Positive	Receives data to the Garmin device.
NMEA 0183 Rx/B (In -)	Data Input Negative	Receives data to the Garmin device.
Alarm/Accessory	Alarm or Remote Accessory Switching	Functionality varies by connected device.