ComNav 2001 Autopilot System
P/N 29010017 V1.0 - 19-
6. SWITCHED PWR
The input voltage appears on this terminal when
the autopilot is in any mode except STANDBY
or OFF. It can supply up to 3 amps of current for
use as the power source for a solenoid operated 4-
Way Valve, or, to activate an electric steering
system. A yellow diagnostic LED is provided in
the distribution box to confirm the correct
operation of this output.
For 12V 4-Way Valve operation, it is
recommended that this output not be used. The
common lead from the solenoids should be
connected to UNSWITCH. PWR (term. 3).
7. SPEED CONTROL
This is a linear signal used with variable speed
drive systems. It is centred between +5 VOLTS
and COMMON (terminals 8 and 9) when no
change of rudder angle is required, and moves up
or down from that point by as much as 1.5 VDC
for maximum rudder position change to port or
starboard respectively.
8. +5V
9. COMMON (REFERENCE ONLY)
+5 volts appears across these terminals whenever
the autopilot is turned on. These terminals are
used by several of the Control Boxes
manufactured by ComNav Marine Ltd as a
reference for SPEED CONTROL (terminal 7). A
yellow LED is provided in the distribution box to
confirm the operation of the 5V power supply in
the autopilot.
10. JOG PORT
11. JOG STBD
12. JOG COMMON
If any jog levers are being used in the system,
they should be connected to these three terminals.
If the jog levers are to be active all the time,
whether the autopilot is turned on or off, connect
the common from the solenoid operated 4-way
valve to UNSWITCH PWR (terminal 3) rather
than SWITCHED PWR (terminal 6).
13. RUDDER PWR
14. RUDDER POS'N
15. RUDDER COM.
These three terminals connect to the rudder
follower. With the cable from the distribution box
unplugged from the rear of the autopilot, and the
rudder turned to dead ahead, the resistances
between RUDDER PWR and RUDDER POS'N,
and RUDDER POS'N and RUDDER COM.
should be equal, and each measure approximately
600 ohms.
16. RAI SIGNAL
17. RAI RETURN
These two terminals are used to run one or more
rudder angle indicators of the zero centre type (ie.
the needle should indicate zero degrees of rudder
with no power applied to the indicator). The total
current drain may not exceed +/- 2.0 milliamps.
ComNav supplied rudder angle indicators each
draw +\- 0.5 milliamps for full-scale deflection,
so up to four may be used.
Other manufacturer's rudder angle indicators may
require different amounts of current for full-scale
deflection. If more than one rudder angle
indicator is used, each should have the same
current requirements.
Multiple rudder angle indicator installations
should be wired in parallel. The RAI GAIN
potentiometer may need to be adjusted as
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