ComNav 1101 Autopilot INSTALLATION 4 - 9
Port/Stbd Out
Terminal 4 and 5 are the two main steering outputs from the
Autopilot System. Each output line is driven by a solid state switch
that is capable of handling up to 3 amperes of current.
These switches, when “on”, make a closed connection to ground.
When they are “off’, the connection to ground is broken, and the
output line is effectively open circuit. Due to this configuration, the
solid state switches are said to be “open collector’ circuits.
These outputs can be used directly to operate a solenoid operated
hydraulic 4-way valve. They may also be used as inputs to a solid
state drive box for electric steering systems (either hydraulic or
mechanical).
Since these outputs are open collector, either of these output lines
can be overridden with an external switched connection to ground
(such as from a Jog Lever).
A pair of diagnostic light-emitting diodes (LEDs) are provided on the
Distribution Box Circuit Board to confirm the correct operation of the
PORT (red LED) and STBD OUT (green LED) lines.
Switched Power
The voltage at the Autopilot power terminals also appears on
terminal 6 whenever the Autopilot System is turned on and is not in
STANDBY mode.
The voltage at this terminal can be used to supply up to 3 amperes
of current to activate a clutch assembly steering system, such as a
Linear Actuator or Cable Drive.
A yellow diagnostic LED is provided on the Distribution Box Circuit
Board to confirm the correct operation of this output.
Speed Control
A linear signal on terminal 7 is used with variable speed drive
systems. It is centered between +5 VDC 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 2.5 VDC for maximum rudder
position change to port or starboard respectively.
+5 VDC/Common
+5 VDC appears across terminals 8 and 9 whenever the Autopilot
System is turned on. These terminals are used by several of the
drive boxes manufactured by ComNav as a reference for SPEED
CONTROL (terminal 7).
To Next Page
Loading...
