Connection between the gate valve and the Motor Control Unit
This connection is only required if the optional hydraulic gate valve is installed. This interface prevents the transducer to be lowered while the gate valve is closed. It also prevents the gate valve from closing when the transducer is lowered.
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In the Motor Control Unit, the connection as made using socket P9 on the Hull Unit Control circuit board. The Hull Unit Control circuit board is located in the lower right corner of the Motor Control Unit. It is mounted upside down.
The following items and consumables are required:
•  Plug Phoenix Contact MCVW1.5/4-STF-3.81
(Kongsberg Maritime Part number: 370-097775)
•  Cable
•  Grommet
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A Motor Control Unit
B Hull Unit Control circuit board
C Power supply
D Gate Valve Control Unit
E Limit switch on gate valve
You may need to make a hole in the Motor Control Unit cabinet to pull the cable through. Make sure that the hole does not have any effect on its splash proof integrity. Use a suitable grommet to protect the cable from the sharp edges of the hole.
The gate valve is manufactured by Meson. For more detailed information about the gate valve and the Gate Valve Control Unit, refer to the technical documentation provided by the manufacturer.
How it works
When the gate valve is open, the limit switch "NC" on the is also open. Once the gate valve leaves the "open position" (starts to close) the "NC" limit switch is also closed. This makes optocoupler U7 close too, sending "Inhibit" to the CPU on the Hoist Control circuit board. The transducer can then not be lowered.
U2 is "closed" when the transducer is fully retracted. The ground level from pin 19 in the Gate Valve Control Unit is then passed to pin 3, and the relay between pins 2 and 3 (in the Gate Valve Control Unit) is then activated. Pin 6 is +24 VDC. When activated, this relay allows the gate valve to close. U2 is "open" when the transducer is not fully retracted up, this is anywhere between fully lowered and "almost up". The relay between pins 2 and 3 in the Gate Valve Control Unit is then deactivated. This prevents the gate valve from closing.
If you loose power in the Motor Control Unit while the transducer is lowered, U2 will be kept"open" due to the lack of power. This will cause the relay between pins 2 and 3 in the Gate Valve Control Unit to deactivate. This prevents the gate valve from closing.
Minimum cable requirements
•  Conductors4 x 0.75 mm2
•  ScreenNone
•  Voltage: 60 V
•  Maximum outer diameterNot applicable