Wiring For Noise Control; Noise Control - Estun pronet series User Manual

3.6 Wiring for Noise Control

3.6.1 Noise Control

The servo drive uses high-speed switching elements in the main circuit. It may receive "switching noise" from these
high-speed switching elements.
To prevent malfunction due to noise, take the following actions:
• Position the input reference device and noise filter as close to the servo drive as possible.
• Always install a surge absorber in the relay, solenoid and electromagnetic contactor coils.
• The distance between a power line (servomotor main circuit cable) and a signal line must be at least 30 cm. Do not put
the power and signal lines in the same duct or bundle them together.
• Do not share the power supply with an electric welder or electrical discharge machine. When the servo drive is placed
near a high-frequency generator, install a noise filter on the input side of the power supply line. As for the wiring of noise
filter, refer to (1) Noise Filter shown below.
• For proper grounding technique, refer to (2) Correct Grounding.
(1) Noise Filter
Please install a noise filter in the appropriate place to protect the servo drive from external noise interference.
Notice：
AC 200V
AC 400V
3.5mm min.
•For ground wires connected to the ground plate, use a thick wire with a thickness of at least 3.5 mm
stitch cooper wire)
• should be twisted-pair wires.
•When using a noise filter, follow the precautions in 3.6.2 Precautions on Connecting Noise Filter.
*
3
Noise filter
*
1
2
Operation relay sequence
Signal generation circuit
*
*
3
2
Noise
filter
(ground plate) (ground
(ground plate)
Wires of
*
1
3.5mm min. 2
ProNet Series AC Servo User' s Manual
Servo Drive
L1
L2
L3
CN2
CN1
DC
power
*
3.5mm min. 1
2
plate)
(ground plate)
(ground plate)
Ground: Ground to an independent ground
use ground resistor 100 Ω max.
- 50 -
Servomotor
M
(FG)
PG
2mm min. 2
3.5mm min. 2
2
(preferably, plain