Hamilton Jet HTX30, Product Manual

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Appendix HTX30 Product Manual
8-24
GPS antenna weight (excluding mounting
adaptor): 0.75 kg.
Figure 28: GPS antenna dimensions
(without mounting adapter)
Module inputs and outputs
Refer to the appropriate vessel wiring schematics for wiring information.
Module inputs and outputs
Output - Throttle:

blue ARROW provides normal and backup throttles.

If the engine does not support a backup throttle, a changeover relay must be provided to select between
normal and backup throttle demand.

This is a voltage free contact that will short to ground when in normal mode, and float high when in
backup mode.

The relay coil is connected between battery and the normal/backup control line.

Normal throttle is connected to the NO contact.

Backup throttle is connected to the NC contact.
Output - Engine start interlock:

blue ARROW provides an engine start interlock.

This is a voltage free contact signal which is shorted to ground when blue Arrow is in control of the
vessel.

This signal will inhibit engine starting when it is floating.

A relay must be provided with the coil connected between battery and the engine start interlock
line

The NO contacts must be in series with the engine start solenoid.
In the unlikely event of a complete control system failure, the engine start interlock will
prevent the engine from starting.
This will leave a single jet vessel with no means of propulsion.
A bypass switch must be fitted across the engine start interlock relay to allow the engine to start.
Alternatively, a relay with a manually lockable test option (for example, Omron MY2IN ) can be used as the
engine start interlock relay.
Refer to the appropriate engine schematics for details.
This bypass switch is optional for twin jet vessels.