• A single drop cable has a maximum length of 6 meters (20 ft). The total length of all drop
cables combined should not exceed 78 meters (256 ft)
• The backbone needs to have a terminator at each end of the backbone. The terminator
can be a terminator plug or a unit with built-in terminator
A NMEA 2000 device
B Drop-cable
C Terminator
D Power supply
E Backbone
Powering the network
The network requires its own 12 V DC power supply, protected by a 3 amp fuse.
For smaller systems: connect power at any location in the backbone.
For larger systems: connect power at a central point in the backbone to balance the voltage
drop of the network. Make the installation such that the load/current draw on each side of
the power node is equal.
Ú
Note: 1 LEN (Load Equivalency Number) equals 50 mA current draw.
Ú
Note: Do not connect the NMEA 2000 power cable to the same terminals as the engine
start batteries, autopilot computer, bow thruster or other high current devices.
NMEA 0183
The unit has a built in NMEA 0183 serial interface, providing both input and output. The
port(s) uses the NMEA 0183 (serial balanced) standard, and can be configured in the software
for different baud rates up to 38,400 baud.
Wiring | NSO evo3S Installation Manual
17
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