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NMEA 2000 Network
Installation Instructions
This instruction sheet covers the conguration and installation of a NMEA 2000
network.
HDS Units
If you have an HDS unit, you must make a one-time purchase of a NMEA 2000
Starter kit to create a NMEA 2000 network.
NMEA 2000 Starter kit (p/n: 000-0124-69)
2-ft extension cable 120 ohm male terminator
15-ft extension cable 120 ohm female terminator
2 T connectors Power node
Inline Terminator Cable
Some Lowrance LCX and LMS units and LGC-3000 antennas pack with an inline
terminator cable — a cable with a 120 ohm terminator built into each end. You must
discard the inline terminator cable and purchase a NMEA 2000 Starter Kit if you
want to add more devices to that type of network.
Network Construction
To add a power node, display unit or device to a NMEA 2000
network, you MUST connect it to the bottom of a T connector
as shown in the diagram on the right.
The top of a T connector can be connected to other T
connectors, a terminator or to an extension cable that runs to
other T connectors in a different part of the boat.
NMEA 2000 Network Components
Nodes T connector connected to a NMEA 2000 device
Terminators
Male and female 120 ohm terminators are connected to
network at opposite ends of the NMEA 2000 backbone
Backbone
Consists of network cabling, T connectors and two 120
ohm terminators
Top of T connector
Bottom of T connector