AUTOPILOT
Additional parts for installation: All parts needed for installation are included, for the
Autopilot instrument and compass. For the Servo Unit, Rudder Angle Transmitter,
Pumpset and Linear Drive, the following material is not supplied and need to be
sourced or made locally: safety switch, power cables, screws / bolts / nuts and support
bracket for mounting, hydraulic fittings, piping and oil. This is because most installations
differ.
11.2 Installation alternatives
This section covers installation of Autopilot instrument, Servo Unit and Rudder Angle
Transmitter. For the installation of compass transducer, pumpset, linear drive, see
separate instructions supplied with each product.
You can install the Nexus Autopilot for two different applications:
• Stand alone Autopilot application.
• Nexus Network application, by connecting it to the Nexus Network.
11.3 Wire thickness
Important! Use the following table to determine wire thickness. Total distance from
battery to Servo Unit and distance from Servo Unit to pumpset must be used to
determine the wire thickness from the table.
Cable Length
Max m (ft) Wire Size
(mm²) Wire Size
(AWG)
3 (10) 2.5 14
5 (16) 4 12
7.5 (25) 6 10
12 (40) 8 8
Make sure, that the wire size between the battery and the point where you will connect
the wire to the Servo Unit is big enough to secure power supply to all other connected
electrical units on board. If you are in doubt, ask your local electrician.
11.4 Servo Unit
11.4.1 Location of Servo Unit
The Servo Unit must be mounted on a dry, flat and vertical surface below deck, at least
500 mm (20") from radio receiving equipment. Since all wiring originates at the Servo
Unit, it should be centrally located to minimise lengths of wiring. It is most important to
minimise the runs of power and motor leads since voltage drop in these cables will
reduce steering capacity.
11.4.2 Installing Servo Unit
To mount the Servo Unit, remove its cover screws. The 4 inner mounting holes are now
exposed. Mount the Servo Unit with 4 screws (not supplied).
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