AUTOPILOT
11.4.4 Safety switch
Important! An external safety switch or circuit breaker (relay) (not supplied) should be
installed in line with power input. Make sure it is rated greater than or equal to 25
Amps.
This switch will serve as your Autopilot ultimate safety OFF switch.
11.4.5 Dip switches
The main circuit board has 2 dip switches which must be pre-set during installation to
suit the installed configuration.
Important! With power turned off to the system, do the following:
a) Locate dip switch for 12 or 24/32 VDC voltage and make sure it is set to the voltage
supply connected. Right position for 12V and Left position for 24V
b) Locate dip switch for ”solenoid valve” or ”pumpset” and make sure it is set to the
type of drive you have installed. Down position for pumpset or integrated linear drive
and up position for Relay or Solenoid systems.
11.4.6 Trim potentiometers
If a non-Nexus brand rudder angle indicator is fitted, it can be calibrated with the 2 trim
potentiometers as indicated on drawing. Adjust VR3 labelled offset, for rudder centre
and VR2 labelled gain, for maximum deflection.
Note! This is just to calibrate any non-Nexus rudder angle instrument. The Nexus
instruments must be calibrated by changing the rudder angle transmitter arm length.
11.4.7 NMEA connections
NMEA input from GPS Navigators etc. can be connected to Servo Unit terminals 12
(data) and 13 (ground). For NMEA input, the overall shield should be terminated at the
external unit, and not at the Servo Unit.
NMEA output from Compass transducer can be taken from Servo Unit terminals 14
(data) and 15 (ground). For NMEA output, the overall shield should be terminated at
the Servo Unit, and not at the external unit.
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