Simrad NSS evo2 series Installation Manual page 21

Planning and installing a network backbone
The Micro-C backbone needs to run between the locations of all products to be installed -
typically in a bow to stern layout - and be no further than 6 m from a device to be connected.
Choose from the following components to make up the backbone:
•
Micro-C cables: 0.4 m (1.3 ft), 2 m (6,6 ft), 5 m (16.6 ft), and 9 m (29.5 ft) cables
•
T-connector. Used to connect a drop cable to the backbone
•
Micro-C power cables. Connected to backbone via a T-connector
¼ Note:
When using a wind sensor, the mast cable should be connected at one end of the
backbone, as the sensor is fitted with a termination resistor.
¼ Note:
Most NMEA 2000 devices can be connected directly to a Simrad SimNet backbone and
SimNet devices can be connected to a NMEA 2000 network by using adapter cables.
¼ Note:
Simrad devices with Micro-C NMEA 2000 connectors are fully compatible with a Sim-
Net network by using a Micro-C to SimNet adapter cable.
¼ Note:
IS40 displays have two Micro-C connectors, and can either be connected inline with
the backbone, or wired individually off a drop cable. Connecting from device to device is
known as 'daisy chaining'. This network topology is not officially NMEA 2000 compliant.
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 central point in the backbone to "balance" the voltage
drop of the network.
¼ 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 existing network
is not powered by 24 V DC.
¼ Note:
Do not connect the NMEA 2000 power cable to the same terminals as the engine start
batteries, autopilot computer, radar, bow thruster or other high current devices.
Wiring | NSS evo2 Installation Manual
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