Interconnection Board; Fig. 3-8 Power Supply Pcb - Simplified Diagram; Fig. 3-9 Interconnection Pcb - Simplified Diagram - Simrad Robertson AP9 Mk3 Instruction Manual

Robertson AP9 MK3 Autopilot
DC voltage is coupled via the isolation transformer T1 to the rectifier
diode D2. The filtered 15V DC voltage is regulated by the feedback
line through the optocoupler to maintain isolation.
The green LD1 indicates presents of voltage.
TB1
FUSE
+
1
24V DC
_ 2.5A
2
1
24V DC
2
TO EXTRA
SUPPLY
TB3

INTERCONNECTION BOARD

(For detailed diagram, refer to SCHEMATICS)
The AP9 MK3 Control Unit is connected to the distribution unit via
one cable from J1, terminated to TB1, TB2 and TB3.
The Interconnection Board provides distribution of the signals to the
BUS plug.
AP9 MK3
CONTROL
UNIT J1
24V DC
ALARM
VOLTAGE
15V DC
REG. FROM
P.S.B.
The 24V DC alarm voltage is connected to TB3. Polarity of voltage is
not critical as the bridge rectifier DB1 rectifies the voltage. The 24V
3-8
FILTER
OSC.
Power supply PCB - Simplified diagram
TB1
TB2
TB3
DB1
R EG .
K2
ALARM
Interconnection PCB - Simplified diagram
T1
FEEDBACK
OPTO COUPLER
Fig. 3-8
LD1
K1
Fig. 3-9
D2
TB2
+
15V
_
LD1
BUS
PLUG
15V ALARM TO
AUTOPILOT
15V MAINS TO
AUTOPILOT
20169223D