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Robertson AP9 Mk3 Autopilot
If the RF14XU is mounted with the shaft pointing upwards, the yellow and
Note !
the blue lead to the potentiometer inside must be interchanged (See Fig.
5-20).
Electrical installation
The cables are carried through cable glands. If required, to avoid any
mechanical damage, the cables should be run in a conduit between
the rudder feedback unit and the Distribution unit or rudder angle
indicator. Electrical connection is shown in the cabling diagram and
the Connection list. The cable screen must be connected to the
internal ground terminal. Ref. Fig. 5-19.
The feedback unit has an external ground terminal an must have a
proper ground connection to the hull. The grounding wire should be
as short as possible and at least 10 mm wide.
The RF14XU can be powered either from the rudder angle indicator
supply (19-40V DC) or directly from the autopilot Distribution unit. If
a rudder angle indicator is connected, the RF14XU is powered from
the rudder angle indicator supply. If the rudder angle indicator
voltage disappears, or rudder angle indicator is not connected to the
RF14XU, the feedback unit is powered directly from the autopilot.
The change over is done automatically.
If RF14XU is connected to rudder angle indicators, and the indicators are
Note !
powered from an unfiltered 24V supply, the enclosed 470uF capacitor
should be connected across the supply. Without the capacitor, a deviation
5-16
Fig. 5-18
RF14XU - Mounting
20169223D
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