Simrad ROBERTSON AP45 manual Simrad Robertson AS Egersund Norway

Robertson AP45 Autopilot		Page 5-11
Installation
G45 Gyro Interface	The G45 is required when a gyrocompass with 1:1 ratio	synchro signal is
Unit	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 7-8to 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

Simrad Robertson AS

Egersund - Norway