NSE8 NSE12 Installation manual

28 | Wiring the NSE

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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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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 refer to SimNet Accessories page 59

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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

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SimNet cables: 0.3 m (1 ft), 2 m (6,6 ft), 5 m (16.6 ft), and 10 m (33 ft) cables

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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) (See system drawings following)

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

The drawing below shows a small SimNet network. Power is introduced at one end using a SimNet power cable with termination ending with a second terminator.

F

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12 V DC

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A B C D

T

E

T

T

SimNet drop cable

SimNet power

SimNet terminator

A slightly larger system below. Power is connected at one end using terminated power cable. A second terminator is required at the end of the backbone.

F

T

SimNet drop cable

SimNet backbone

SimNet power

SimNet terminator

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12 V DC

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A B C D

T

E

M enu

G

M enu

H

T

D

E

F

G

H

A

B

C

Key Description

SimNet power source. Stable 12 V DC only

5 Amp fuse or breaker

Switch

SimNet power cable with termination (red disc) (24005902)

SimNet 7 way joiner

SimNet or NMEA 2000 GPS antenna

SimNet backbone daisy chained using instruments with two SimNet ports.

SimNet backbone

Wiring the NSE | 29

30 | Wiring the NSE

For a large systems or sailboats with a mast head wind sensor and long mast cable, it is recommended to use a SimNet noise filter (24006934). On sail boats the filter should be inserted at the mast junction. On larger systems without a mast head unit, the filter should be inserted centrally along the backbone.

G

T

M enu M enu

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12 V DC

A B C D

F

E

F

F

H

M enu

T

F

G

E

SimNet drop cable

SimNet backbone

SimNet power cable

C

D

E

A

B

F

G

H

Key Description

SimNet power source. Stable 12 V DC only

5 Amp fuse or breaker

Switch

SimNet power cable without termination (yellow disc) (24005910)

SimNet 7 way joiner

SimNet 3 way joiner

Terminator

Noise Filter