Chapter 4 Wiring of Servo System
Chapter 4 Wiring of Servo System
This chapter introduces the wiring and cable connection of servo drive, as well as the issues needing attention.
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Do not open the cover until the power supply of the servo drive is completely disconnected for at least
10 minutes.
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Even if the power is off, high voltage may remain inside the servo drive. To prevent electric shock, do
not touch the power terminals. After discharge is completed, charge LED will turn off. Make sure that the
internal wiring be conducted only when the charge LED inside the drive is off.
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Only the well-trained and authorized personnel are allowed to perform the internal wiring of the servo
drive.
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Check the wiring carefully when connecting the emergency stop or safety circuit.
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Check the voltage level of the drive before power-on, otherwise, human injury and death or equipment
damage may be caused.
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Check carefully whether the rated input voltage of the servo drive is consistent with the AC power
voltage before power-on.
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The servo drive has passed the dielectric strength test before delivery. Do not conduct this test again.
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Do not connect the AC supply cables to the output terminals U, V and W.
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The diameter of copper cable used as grounding wire should be bigger than 3.5mm and the grounding
resistance should be less than 10Ω.
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There is leakage current inside the servo drive and the value of the leakage current depends on the
operating conditions. To ensure the safety, the drive and the motor must be grounded and a Residual
Current Detector (i.e. RCD) is required. The type B RCD is recommended. The set value of the leakage
current is 300mA.
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To provide the over-current protection for the input side and facilitate the power-off maintenance, the
servo drive should be connected to the AC supply through a circuit breaker or a fuse.
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