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Maretron NMEA 2000®

Network Installation Guide

Installing an NMEA 2000® Network

Installing an NMEA 2000®network consists of interconnecting

NMEA 2000® electronic devices using plug-and-play

cables and connectors. The following pages provide a brief

description of how to set up a NMEA 2000® network using

five basic steps:

1. Cable and Connector Network Basics

2. Installing Terminators

3. Supplying Power

4. Grounding the Network

5. Checking the Network

Please note that this installation guide contains a brief

description of the basic concepts of installing an NMEA

2000® network and Maretron suggests that you consult

a trained professional for any installation. You can learn

more about installing NMEA 2000® networks by contacting

the National Marine Electronics Association (NMEA) at

www.nmea.org and consulting the following documents:

• NMEA 2000® Standard for Serial-Data Networking of

Marine Electronic Devices

• NMEA Installation Standards

1. Cable and Connector Network Basics

1.1 Network Topology

The NMEA 2000®cable system uses a trunk (sometimes

referred to as the backbone) and drop line topology as

shown in Figure 1.

The NMEA 2000®cable system includes five wires within a

single waterproof cable: two signal wires, power and ground

wires, and a drain wire. The drain wire shields the signal, power,

and ground wires from external Radio Frequency Interference

(RFI) and helps reduce RFI emission from the cable.

You can connect devices using one of three cable options:

Mini- This is commonly used for the trunk line on the network

because of its greater current carrying capacity (8 amps) as

Figure 1

NMEA 2000®

Network Topology

Multi

Port

Box

110

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