Motor Power Company DUET_FL 48/10, User Manual

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Connection between the DUET_FL and the motor
If the DUET_FL servo positioning controller is mounted directly on the motor, the cables are located
inside the housing. They are only a few cm long. In this case, shielding is not necessary.
If you want to mount the motor and the DUET_FL separately, please observe the following wiring
instructions:
 Use shielded cables only. The encoder cables should have an internal and an external shield.
 Use separate cables for the motor phases and the angle encoder.
Alternative: Use a combined cable for the motor and the angle encoder, but with separate
shields.
 Connect all (external) shields with the housing of the DUET_FL controller.
 Connect the shield of the motor cable with the motor housing.
 Connect the internal shield of the encoder cable to PIN 1 of [X2].
 Make sure to set up a "good" PE connection between the motor and the DUET_FL controller.
A "good" PE connection has only a low impedance even in the case of very high
interference frequencies. An optimum PE connection can be obtained by mounting the
DUET_FL controller directly on the motor. If you want to mount the DUET_FL controller
and the motor separately, make sure to mount them on the same (metal) part of the
machine. In this case, the surface of the machine part should be made of uncoated
aluminium or galvanized sheet metal!
11.20.2 Connection between the DUET_FL and the power supply unit
 Use cable with a sufficient cross-section, to reduce "ground bouncing" effects on the DC bus
supply (intermediate circuit supply):
2.5 mm² (AWG13) should be sufficient for a cable length of up to 5 m between the power
supply unit and the DUET_FL controller.
 Use a star-shaped cable layout (see chapter Connection to Power Supply and control in
system) if you want to connect several DUET_FL controllers to one power supply unit. The star
point of the reference potential should be as close as possible to the power supply unit.
 The power supply unit should have a Y-capacitor of at least 100 nF between the DC bus
voltage (intermediate circuit voltage) and PE as well as between GND and PE.
 Make sure to set up a "good" PE connection between the DUET_FL controller and the power
supply unit. It is important to ensure a good feedback of the high-frequency leakage currents
generated by the clocked power stage in the DUET_FL controller combined with the winding
capacity between the motor phase and PE in the motor.
 To make sure that the radiation limits are complied with, use a shielded cable.
User Manual DUET_FL „DUET_FL 48/10“ Version 1.1 Motor Power Company