Creating a NMEA 2000 Network Simplified

9 Oct

Creating a NMEA 2000 Network Simplified

October 09, 2024

Embarking on the journey of setting up a NMEA 2000 network for your boat often seems like a daunting task. At BOE Marine, where we receive weekly inquiries about this very process, we've come to realize that it's much simpler than it's made out to be.

In today's world, a NMEA 2000 network has become needed, acting as the vital link connecting various marine electronics and data transfer. Whether it's integrating different devices with MFDs or chartplotters, this network streamlines operations with easy connectivity.

The beauty lies in its simplicity—no intricate wire splicing involved, just straightforward connection of cable wire ends.

You will need to start with a NMEA 2000 starter kit, a comprehensive package encompassing everything required for smooth sailing. This kit typically includes multiple T connectors, a duo of resistors, a couple of backbone cables, and the essential power cable. The Garmin power cable is often times Yellow.

Here's the breakdown of the setup:

Device Integration: Each device seamlessly connects directly to a single T connector, ensuring a direct and secure link.

Network Backbone: These T connectors form the backbone, either interlinked directly or through backbone cables. The beauty of this system lies in its adaptability, the backbone length can be tailored to suit your vessel's unique configuration.

Cable Connection: The heart of the network lies in the connection of devices to the backbone using drop cables, keeping lengths within the recommended 20ft range. This may necessitate strategic placement of T connectors, possibly bridged by backbone cables for optimal connectivity.

Installing Terminators: Each Starter kit comes with two resistors that are needed for every network. This is oftentimes the most confusing part for new installers. Simply cap the T on each side of the network with one resistor. If this is not done, the NMEA 2000 system will not function properly.

PRO TIP: It is recommended to have your power cable in the middle of your backbone. (Connect your power cable closest to the middle T on the network).

Still confused? Check out this diagram.