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Robertson AP45 Autopilot
Installation
Simrad Robertson AS
Egersund - Norway
Page 5-11
The G45 is required when a gyrocompass with 1:1 ratio synchro signal is
connected to AP45.
There is separate terminals for high voltage (80V L-L) and low voltage (11,6V L-L)
synchro input. Input terminals not used should be short circuited as shown in
connection diagrams.
G45 can also be used for excitation of a “dead” synchro transmitter.
The unit shall be mounted within the cable length (3 m) from the autopilot control
unit. In case the cable has to be extended, the 2.5V reference voltage must be
checked and eventually readjusted in accordance with “TROUBLE SHOOTING”,
page 7-8 to maintain the accuracy.
All cable conductors are terminated in screw terminals on the G45 PCB. For
cabling and connections see Fig. 5-11.
The PCB contains four trim potentiometers which are all factory set and should
normally need no readjustment.
Select “Gyrocompass” - “1:1 Synchro” in the AP45 Installation loop. See
“Installation loop”.
Fig. 5-11
Connection to G45 excitated synchro transmitter
Fig. 5-12
Connection to gyro excitated synchro transmitters
G45 Gyro Interface
Unit