Simrad Robertson AP9 Mk3, Instruction Manual, Page: 60 / 202

Robertson AP9 MK3 Autopilot
3-2
20169223D
In Robertson terminology this is called "setting parameters", and it
will determine the performance of the autopilot.
I/O
INTERFACE
DRIVER
GYRO
COMPASS
MAGNETIC
COMPASS
COURSE
SELECTOR
DISPLAY
RUDDER
FEEDBACK
PROGRAM
CPU
KEYPAD
RUDDER
SOLENOID
VALVES
Fig. 3-2
Processor controlled autopilot
3.2 AP9 MK3 Control Unit
The AP9 MK3 Control Unit is made of sea water resistant aluminium
and has a polyester coating which gives good protection against
environmental exposure.
The unit contains three electronic boards (See Fig. 3-3), which are the
Front Board, Display Board and the Interface Board.
The Front Board contains the micro computing circuitry, together
with the electronics for the course selector. The alarm circuit is also
included on this board.
The Display Board consists of the back lighting- and the display
electronics.
All interface plugs for Heading Sensors, Distribution Unit,
Navigational Receiver, Remote Controls etc. are mounted on the
Interface Board.
The three boards are interconnected by plugs, and the
interconnection is executed by mounting the boards into the control
unit. (If the control unit is to be tested open with mains supplied,
special cables are required).
If the control unit is to be connected to gyros other than the serial
signal type, an optional AP9 MK3 Gyro Interface Board is required.
All connections to the autopilot are made through Amp CPC
connectors to facilitate easy maintenance.
All parameter settings and operation of the autopilot are made using
the push buttons on the AP9 MK3 Control Unit.