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General NMEA 2000 Installation Rules
Only devices/sensors should be connected to the bottom of a T •
connector; the connectors at the top of the T connector are only used
for extension cables, terminators and other T connectors
Power the Network only once•
A terminator must be connected to each end of the network •
backbone
You can attach an extension cable between a device and the bottom •
of a T connector, but there should never be more than 18’ (6 meters)
of cable between a device and its T connector; likewise, the network
— including drop lengths — should never be more than 200’ (60
meters) long
Powering a NMEA 2000 Network
If you have an HDS unit, you MUST power the network with a power node.
If you have a LCX or LMS display unit, you can power the network with a power
node or with your display unit. It is very important to use only one of these
methods for powering your network.
Refer to your unit’s operation manual to power the network with your display unit.
120 ohm
terminator
120 ohm
terminator
Nodes
Network backbone
Fuel Flow
Power Node
Display Unit
Temp Sensor
Display Unit