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Proper Termination

You must install terminators at the ends of your NMEA 2000 backbone for it to function correctly. You have two options when installing

terminators on your NMEA 2000 network.

1. Typical Terminators

If your NMEA 2000 network is built with correct linear backbone construction, use one female terminator and one male terminator. Install

the terminators at opposite ends of your NMEA 2000 network.

Female

terminator

2. In-line Terminators

If one or both of the NMEA 2000 devices at opposite ends of your NMEA 2000 network are separated from the rest of the NMEA 2000

network by a length of backbone cable, and the typical T-connector/drop cable/terminator combination is not feasible or is too bulky for the

area, use an in-line terminator instead of the final T-connector on the backbone. Connect the final device to the in-line terminator with the

appropriate length of drop cable, or connect the final device directly to the in-line terminator, without a drop cable.

Standard Termination

To a NMEA

2000 device

Female

terminator

CautioN: Do not use more than two terminators in a NMEA 2000 network.

Note: The in-line terminator connects to the NMEA 2000 backbone with a male connector, and to the final NMEA 2000 device with a female

connector. Because of this, you can only use one in-line terminator on a NMEA 2000 network.

Technical Reference for Garmin NMEA 2000 Products

To NMEA 2000 devices

and power

Backbone extension cable

Using Standard Terminators

To power

Backbone

extension

cable

Using an Inline Terminator

Inline Termination

To the final NMEA 2000 device in the

backbone on this end. Connect the in-line

terminator directly to a NMEA 2000 device,

or use a drop cable up to 6 m (20 ft.) long.

Do not connect additional T-connectors or

terminators.

Inline

terminator

NMEA 2000 Fundamentals

Male

terminator