Simrad ROBERTSON AP45 manual Robertson AP45 Autopilot Installation, Screen termination

Robertson AP45 Autopilot	Page 5-17
Installation

Electrical installation

Electrical connection is shown in Fig. 5-21.The cables are carried through cable glands and connected to the terminal board. If required, to avoid any mechanical damage, the cables should be run in a conduit between the rudder feedback unit and the junction unit or rudder indicator. The cable screen must be connected to the internal ground terminal. Ref. picture below.

The feedback unit has an external ground terminal and 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).

Fig. 5-19

Screen termination

Scaling of rudder angle

The RF14XU is normally delivered for ±45 degrees rudder angle (violet, brown and pink leads are not connected). For ±60 degrees, connect brown lead to terminal 10, for ±70 degrees, connect pink to terminal 10 and for ±90 degrees, connect the violet lead to terminal 10. White lead must remain connected. To invert the indicator deflection, the brown lead to terminal 8 of the RF14XU terminal board must be connected to terminal 9. See Fig. 5-20.

Simrad Robertson AS

Egersund - Norway