Analog Steering Gear Control - Simrad AP50 Installation Manual

Simrad AP50 Autopilot
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Analog Steering gear control

The JD53 Distribution Unit provides dual analog control of
rudder(s) in an AP50 system by either continuous voltage or
current signal.
The following description shows how to connect the various
analog control signals of JD53 to the steering gears.
Signal level and polarity are adjusted from the AP50 Control
Unit (Ref. AP50 Autopilot Manual, Software Setup Procedure).
Whenever autopilot control is selected, the analog signals will
give rudder commands in NFU, FU and AUTO mode. In STBY
mode the analog control line will be open (relay contacts located
inside JD53). Should the steering gear be of a kind that does not
give rudder stop for an open control line when autopilot control
is selected, the S5 (ref. Figure 2-22) can be used to keep the
control line always closed irrespective of mode and rudder
commands. Alternatively the Mode signal can be used to
prevent an open line (ref. page 24).
Make sure the DIP switch SW1-1 is set to OFF (ref. page 27).
Galvanic Isolated ±10 V control
The nominal 0±10 VDC control signals are available at TB20
and TB22 terminals 1 and 2, see Figure 2-17. This voltage is
galvanic isolated from the operating voltage for the autopilot (24
VDC). Rudder zero voltage and control range can be adjusted in
the Dockside setup (ref. page 55).
Jumpers S1 – S4 must be set to "INT", ref. Figure 2-22 to
identify the jumper locations.
Figure 2-17 Isolated ±10V output
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