Motor Control Unit familiarization
The purpose of the Motor Control Unit is to control the hoisting motor on the hull unit. When you make the appropriate commands on the CS90 sonar, the Motor Control Unit will start and stop the motor. It will also make sure that the motor rotates the correct way.
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•  A: Internal 24 Vdc power supply
•  B: Ethernet connector
•  C: Hand crank
•  D: Mains filter
•  E: Hull Unit Controller circuit board
•  F301: Fuse for internal power supply
•  E301: Terminal strip for AC mains input
•  K301: Hoisting contactor
•  K302: Lowering contactor
•  K303: Phase watch relay
•  L1: Yellow indicator light
•  L2: Green indicator light
•  S301: Motor protecting switch
•  S302: Hoist/lower switch
•  S303: Hand crank with safety switch
•  P302: Connector for hull unit limit switches and rotation sensor
During normal operational conditions, the L1 and L2 indicator LEDs are lit.
•  LED L1 indicates that the Phase Watch Relay K303 is activated. This mean that the 3-phase voltage is applied, and that the three phases are correctly connected with regard to the rotation direction of the hoisting motor.
•  LED L2 indicates that the internal +24 VDC power supply for the control electronic is operational.