Overview

This Garmin NMEA 2000 backbone/drop and power cable is used to extend a NMEA 2000 network, either by adding length to the backbone between T-connectors or by making a drop connection from a device to a T-connector. Cable lengths in this range cover short jumpers for a crowded helm as well as longer runs across the boat, including 1 ft (0.3 m), 2 m (6.5 ft), 13 ft (4 m), 19 ft (6 m), and 32 ft (10 m) options.

If you are adding network power, the dedicated power-cable option connects the NMEA 2000 backbone to a 12 Vdc source and includes a 3 A fuse. NMEA 2000 devices run on 9 to 16 Vdc (12 V nominal), so the network should not be fed from 24 V. Powering the network through an ignition or other external switch helps prevent battery drain when electronics are off.

Key features

• NMEA 2000 micro connectors for standard NMEA 2000 network cabling and T-connectors
• Backbone/drop cable lengths available from 1 ft (0.3 m) up to 32 ft (10 m)
• Right-angle drop options available for tight clearance behind displays and other devices
• Cables up to 6 m can be used as backbone or drop; the 10 m option is intended for backbone runs
• Power-cable option is 2 m (6.5 ft) and includes a 3 A fuse with bare-wire leads for connection to 12 Vdc
• Network power is meant to be connected through a switch; avoid powering the backbone in more than one location unless a power isolator is used

Variants

This listing covers multiple configurations that vary by cable type (Backbone/Drop or Power), connector style (straight or right-angle on drop cables), and length.

Backbone/Drop lengths in this range include 1 ft (0.3 m), 2 m (6.5 ft), 13 ft (4 m), 19 ft (6 m), and 32 ft (10 m). Right-angle drop versions are offered in 1 ft and 2 m lengths for installations where there is limited space behind the connector. The power-cable option is 2 m and is used to feed the network from a 12 Vdc source through a fused connection.

Compatibility and fit

These cables are for NMEA 2000 networks that use micro connectors. On a typical setup, backbone cables connect to the sides of T-connectors to keep the backbone linear, and drop cables connect devices to the top of a T-connector. If your boat has an older NMEA 2000 mini-connector backbone, an adapter system is required to mix connector types.

Installation and setup

Use a backbone cable when you need to span distance between sections of the network, such as from the helm to a sensor cluster, engine gateway, or a module mounted in a console or cabin. Use a drop cable when you need to reach from a device to its T-connector without putting strain on the connector or forcing a tight bend.

The right-angle drop option is helpful behind flush-mounted chartplotters, instrument displays, or black boxes where the back of the unit sits close to a bulkhead. It can also reduce the chance of the connector getting bumped when the boat is pounding in chop.

Electrical and system integration

When using the power cable, feed the NMEA 2000 backbone from a switched 12 Vdc source so the network is off when the boat is off. Keep the power connection at a single point in the network unless your installation includes a proper power-isolation method. This helps avoid unexpected behavior and protects network components.

Use cases on board

This cable range fits common network jobs like extending the backbone during a helm refit, adding an AIS transceiver, integrating an autopilot or sensors, or cleaning up short connections inside a console. It is a good match for owners who want a tidy NMEA 2000 layout with fewer stacked extensions and a connector style that works in the space available.