ComNav 11101 - Distribution Box Connections; Autopilot Power; Unswitched Power

ComNav 1101 Autopilot4 - 8 INSTALLATION
Distribution Box Connections
The functions of each set of connections to the Distribution Box (see
Figures 7 and 8) are as follows:
Autopilot Power
Terminals 1 and 2 should be connected to a source of DC power on
the vessel. The DC power can be 12 or 24 volts DC. The maximum
current requirement is less than 4 amps. The 1101 Autopilot
System is configured for negative ground only.
For vessels with positive ground, or with multiple power sources (i.e.
AC and DC power sources) the SPU should be electrically isolated
from the vessel. This can be accomplished by mounting it to a
nonconducting material, such as wood or fiberglass. This will
prevent any damage from ground currents.
Power to supply the Autopilot System should be taken directly from
a breaker or power distribution panel. The Autopilot should be wired
into its own circuit, however, this circuit can also send power to the
drive unit.
If the drive unit installed is for a Reversing Electric Motor, it should
be wired back to the breaker separately from the rest of the
Autopilot System (i.e. do NOT wire from the breaker to the drive unit,
and then from the drive unit to the Autopilot). The combined current
requirement of the Autopilot and any reversing electric drive unit
manufactured by ComNav will not exceed 30 amps.
Unswitched Power
Battery voltage is available on Terminal 3 whenever the Autopilot
circuit breaker is on.
If a solenoid-operated 4-way valve is being used, wire this terminal
to the common of the solenoid valve to ensure adequate voltage
supply (see Figure 8–A).
If Jog Levers are being used and are to be active even when the rest
of the Autopilot System is turned off, wire this line to the common of
the solenoid-operated 4-way valve.
WARNING!
When the UNSWITCHED POWER terminal is used, and if
there is a malfunction of the Autopilot or Jog Lever which
causes the 4-way valves to be continuously activated, the
only way to deactivate the 4-way valve is to turn off the
breaker which supplies power to the system.