Electrical Design Guide
‑47‑
● Tighten the terminal screws with an angle not higher than 5°. Failure to comply
may damage the terminal screws.
3.5.3 Grounding and Wiring
Observe the following requirements to ensure a proper grounding of the servo drive.
● To prevent electric shocks, ground the grounding terminal properly. Observe
related national or regional regulations during grounding.
● To prevent electric shocks, ensure the protective grounding conductor complies
with technical specifications and local safety standards. Keep the length of the
grounding cable as short as possible. As the leakage current of the equipment may
exceed 3.5 mA, it is recommended to use a copper protective grounding conductor
with a cross‑sectional area of at least 10 mm
2
, or use two protective grounding
conductors with the same specification.
● The dimensions of the grounding cable must comply with the electrical device
technical standards. Keep the length of the grounding cable as short as possible.
Failure to comply will lead to unstable potential in the grounding terminals away
from the grounding point due to leakage current, resulting in an electric shock.
● For use of multiple servo drives, observe all the grounding instructions for the
drive. Improper grounding of the device will lead to malfunction of the drive and
the device.
● Do not share the same grounding cable with other devices (such as welding
machines or high‑current electrical devices). Improper grounding of the device will
lead to drive or device faults caused by electrical interference.
● For use of multiple servo drives, observe all the grounding instructions for the
drive. Improper grounding of the device will lead to malfunction of the drive and
the device.
● For drives equipped with optional VDR and insulation resistor grounding screws,
remove the grounding screw before voltage resistance test. Failure to comply may
cause the drive to fail the test.
Grounding requirements
Observe the following requirements to ensure a proper grounding of the drive.
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