Simrad AP50 Installation Manual download pdf (Page 22)

Installation

20222469 / B 13

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

junction 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.

Note ! If RF14XU is connected to rudder angle indicators, and the

indicators are powered from an unfiltered 24V supply, the

enclosed 470uF capacitor should be connected across the

supply. Without the capacitor, a deviation may occur between

the autopilot feedback midposition reference and that of the

rudder angle indicator(s). Scaling of rudder angle of indicators

may be required. Refer to Figure 2-9, note 2.

Cable screen

Figure 2-8

Screen termination

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Simrad AP50 Installation Manual Page 22