• Micro-C cables: 0.6 m (2 ft), 1.8 m (6 ft), 4.5 m (15 ft), and 7.6 m (25 ft) cables.
• T-connector or 4-way connector. Used to connect a drop cable to the backbone.
• Micro-C power cable. Connect to the backbone at a position that is central to the network
load using a T-connector or 4-way connector.
Power the network
The network requires its own 12 V DC power supply protected by a 5 amp fuse or breaker.
For vessels fitted with 24 V systems, use a DC-DC converter to supply 12 V.
Connect power at any location in the backbone for smaller systems.
For larger systems introduce power at a central point in the backbone to balance the voltage
drop of the network.
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Note: If joining to an existing NMEA 2000 network that already has its own power
supply, do not make another power connection elsewhere in the network, and ensure
the existing network is not powered by 24 V DC.
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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.
The following drawing demonstrates a typical small network. The backbone is made up of
directly interconnected T-connectors.
1 NMEA 2000 device
2 Connector to unit
3 Drop-cable, should not exceed 6 m (20 ft)
4 Terminators
5 Backbone
6 Power cable
NMEA 0183 device connection
The unit has a NMEA 0183 serial port, providing both an input and an output. The port uses
the NMEA 0183 (serial balanced) standard, and can be configured in the software for different
baud rates up to 38,400 baud.
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Note: The connector for NMEA 0183 is labelled VIDEO on rear of unit, as the cable is dual
purpose and carries both composite video and NMEA 0183 (on seperate wires)
20
Wiring | NSS evo3 Installation Manual
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