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Simrad AP25 Autopilot
74 20221495F
PREVIOUS MODELS DRIVE OF UNITS
Model Autopilot
computer
Drive unit
voltage
Input
voltage
(Mains)
Drive output Interface to
steering
gear
RPU100 (1,0l)
RPU150 (1,5l)
RPU200 (2,0l)
(Reversible
hydraulic
pump)
AC20
AC20
AC20
12V
12V
24V
12,24,32V Proportional
rate
Hydraulic
plumbing
RPU1 (1,4/2,0l)
RPU3 (3,8/5,0l)
AC10
AC10
12V, 24V
24V, 24V
Solenoid
valves, on/off
Hydraulic
plumbing
MRD100
(Reversible
mechanical
drive)
AC40
AC20
12V
24V
12,24,32V
24,32V
12V to clutch
24V to clutch
Proportional
rate to motor
Chain/
sprockets
MRD150
(USA only)
AC20 12V
32V
12, 24V
32V
12V to clutch
32V to clutch
Proportional
rate to motor
Chain/
sprocket
Note ! When selecting DRIVE UNIT voltage in the Installation setup,
the clutch/bypass voltage is always set equal to the motor
voltage. If a retrofit installation where e.g. a HLD2000 has a
12V motor and a 24V bypass valve, the bypass valve solenoid
has to be changed back to standard 12V version.
Connecting a reversible pump
Simrad
reversible
pump
AUTOPILOT COMPUTER
POWER PCB
TB1
TB2 TB3 TB4
TB5
TB6
Sol. -Motor
Sol. -Motor
Figure 3-5 Connecting a reversible pump