Wiring the NSE | 29
• Certain Simrad products have two SimNet connectors, which can be made to be part
of the backbone. This daisy chaining cannot be part of a NMEA2000 backbone
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• NMEA2000 devices can be connected to the SimNet Network providing they:
- are NMEA2000 certified
- meet the CE, FCC regulations with a SimNet adapter cable
- do not exceed the SimNet load specification (please refer to separate document
Simrad SimNet Installation Manual (20222006)
Planning and installing a SimNet backbone
Plan the SimNet backbone carefully
For part numbers. (see “SimNet accessories” on page 77)
The SimNet backbone needs to run between the locations of all SimNet products you
want to install, and be less than a 5.5 m (18 ft) cable run from a SimNet device.
Choose from the following components to make up your SimNet backbone
• SimNet cables: 0.3 m (1 ft), 2 m (6,6 ft), 5 m (16.6 ft), and 10 m (33 ft) cables
• SimNet power cables with or without termination
• SimNet in-line joiner with or without termination
• T-Joiner. Use at locations where you want to connect a single SimNet device or join
lengths of SimNet cable
• 7 way joiner. Use to connect up to 5 devices at one location
• Wind transducer. If using a wind sensor, plan to connect this to one end of the
backbone as this has a terminator built in
Power the SimNet network
A SimNet network requires its own 12 V DC power supply protected by a 5 amp fuse or
breaker. For 24 V use a DC-DC converter
Connect power at one end of the backbone for smaller systems using a SimNet power
cable with termination (red cap).
For larger systems introduce power at central point in the backbone to “balance”
the voltage drop of the network. Use SimNet cable without termination (yellow cap)
(24005910)
If joining to an existing NMEA2000 network or similar CAN bus network that has it’s own
power supply, do not connect to another power supply.
Do not connect the SimNet power cable to the same terminals as the start batteries,
Autopilot Computer, Radar, thruster or other high current products
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