3 Wiring and Connection
3.8.1 Wiring for Noise Control
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3.8
Noise Control and Measures for Harmonic Suppression
This section describes the wiring for noise control and the DC reactor for harmonic suppression.
3.8.1
Wiring for Noise Control
The SERVOPACK uses microprocessors and so it is susceptible to noise from peripheral devices. To prevent
noise influence between the SERVOPACK and peripheral devices, take the following actions as required:
• Position the input reference device and noise filter as close to the SERVOPACK as possible.
• Always install a surge absorber in the relay, solenoid and electromagnetic contactor coils.
• The distance between a power line (linear 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-
PACK 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
.
• Take the grounding measures correctly. As for the grounding, refer to
(2) Correct Grounding.
• Because the SERVOPACK is designed as an industrial device, it provides no mecha-
nism to prevent noise interference.
• The SERVOPACK uses high-speed switching elements in the main circuit. It may
receive switching noise from these high-speed switching elements if wiring or ground-
ing around the SERVOPACK is not appropriate. Take measures against noise if the
equipment is to be used near private houses or if there is concern about radio interfer-
ence.
• Refer to
2.4 EMC Installation Conditions
in the
Σ
-V Series User’s Manual Setup Lin-
ear Motor (SIEP S800000 44) if installation conditions of the EMC directive must be
satisfied.
