ComNav P4 Installation and Operation System Overview
Document PN 29010100 V1r0 - 38 -
Rudder Drives and Interfaces
CT7 Thruster Interface
PN 20350008
The optional CT7 Interface is highly recommended when the P4 Autopilot System is being
used on a vessel equipped with bow and/or stern thrusters, or when the vessel is equipped
with Azimuth Drives (also known as Z-Drives) of various types.
The CT7 is specifically designed to be directly compatible with (and complementary to) the
P4 system, in features, operation, and appearance. It connects directly to the P4’s SPU with
a dedicated cable that carries power and all control/data signals.
The CT7 can operate a number of different solenoid valves, including on/off and proportional
types.
It has standard voltage outputs, current loop outputs and optically-isolated analog outputs.
The CT7 also contains circuitry for interfacing an Electric Wheel to the P4 system, and a
Rudder Simulator which is used when the CT7 is interfaced to Azimuth Drives.
The P4’s SPU has built-in setup and operational firmware support for the CT7; the firmware
activates automatically when a CT7 is plugged into the SPU at the J7 - THRUSTER INTERFACE
connector.
See the CT7 Installation and Operation Manual for full details, and setup and operating
instructions.
Figure 16 – CT7 Interface
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