It is important to minimise the overall cable length
between the solenoid valves and the vessel's
power distribution panel.
Having sited the course computer use the
following table to select the appropriate cable.
Course Computer Power Supply
Cable Length,
Power Supply
to Course
Computer
Cable
Type
Copper
Area
Cable
Gauge
Up to 7m 50/0.25 2.5mm
2
12 AWG
Up to 10m 56/0.3 4.0mm
2
10 AWG
2.3.5 Type CR Installations (Fig.40)
The Type CR Interface (Cat. No Z085) must be
used on all installations with constant running
hydraulic power packs. The power supply is led to
the course computer using the Interface Unit
which has connections for the power pack
solenoid valves, and the bypass valve if one is
required.
The Type CR Interface Unit may also be
connected to alternative constant running
hydraulic power packs providing:-
• The solenoid coils require less than 10 amps
•
The response time of the solenoid valve is less
than 80 milliseconds.
•
The operating voltage of the solenoid coils is the
same as the course computer supply
The supply cable must be protected by a fuse or
current overload trip switch as shown in Fig.40.
30
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