Grounding Measures
- Mount the drive on metal shell(control cabinet)
- Please connect the ground terminal of servo motor to GND PE of servo drive, and ground PE terminal reliably
- Drive must be single-point ground
- Use thick cable(≥2.0mm2) for grounding cables as much as possible; Use thick cable(≥3.5mm2) for external grounding as braided copper wire as much as possible
- Type D or above ground(grounding resistance below 100Ω) is recommended.
- Ensure to connect ground terminal of drive and ground cable(PE) of control cabinet to avoid electric shock
- As there are two protective ground terminals, do not connect all cables together
Anti-interference measures
Due to different application of peripheral wiring, grounding and anti-interference devices, switching noise may affect normal operation of servo drives. Therefore, it must adopt the correct grounding method and anti-interference measure. The following figure is schematic diagram of anti-interference measure for servo drive.
The length of command input cable shall be less than 3m. That of encoder cable shall be below 20m and use twisted-pair shielded cable;
Separate strong current cable from weak current cable and keep a distance more than 30cm. Do not put in the same pipeline or tie together;
Cables, I/O lines and power lines of drive are equipped with ferrite magnetic rings;
Install surge suppressors on the coils of relay, solenoid and electromagnetic contactor;
Please install the noise filter at the input of power line, and do not share the power supply with welding machine, discharge processing equipment, etc.
Connect shielded wires of all cables to ground wire (PE).
Please ground both ends of shielded layer of motor encoder cable.