YASKAWA E-S Series User Manual

4.1 Wiring Precautions
4.1.2 Countermeasures against Noise
4-4
4.1.2 Countermeasures against Noise
The SERVOPACK uses microprocessors. Therefore, it may be affected by switching noise from
peripheral devices.
To prevent the noise from the SERVOPACK or the peripheral devices from causing malfunc-
tions of any devices, take the following countermeasures against noise as required.
• Install the input reference device and Noise Filter as close to the SERVOPACK as possible.
• Always install a Surge Absorber for relays, solenoids, and Magnetic Contactor coils.
• Do not bundle Power Supply Input Cables or Servomotor Power Cables together with I/O
Signal Cables or Encoder Cables or run them through the same duct. If you do not place the
above cables in separate ducts, separate them by at least 30 cm.
• Do not share the power supply with an electric welder or electrical discharge machine. If the
SERVOPACK is placed near a high-frequency generator, install a Noise Filter before the iso-
lated 24-V power supply even if the same power supply is not shared with the high-frequency
generator. Refer to the following section for information on connecting Noise Filters.
Noise Filters on page 4-4
• Implement suitable grounding measures. Refer to the following section for information on
grounding measures.
4.1.3 Grounding on page 4-6
Noise Filters
You must attach Noise Filters in appropriate places to protect the SERVOPACK from the
adverse effects of noise.
The following is an example of wiring for countermeasures against noise.
*1. For the ground wire, use a wire with a thickness of at least 2.0 mm
2
(preferably, flat braided copper wire).
*2. Whenever possible, use twisted-pair wires to wire all connections marked with .
• The SERVOPACK is designed as an industrial device. It therefore provides no measures to pre-
vent radio interference.
The SERVOPACK uses high-speed switching elements in the main circuit. Therefore peripheral
devices may be affected by switching noise. If the equipment is to be used near private houses
or if radio interference is a problem, take countermeasures against noise.
Important
SERVOPACK
1
2
3
4
U
V
W
FG
FG
M
(
FG
)
ENC
2
3
1
N
P
Insulated AC/DC converter
for main circuit power supply
Operation relay sequence
User signal generators
A
C power
supply
Noise Filter
*3
External ground: Use a dedicated ground.
(Grounding plate)
*1
AC/DC
converter
*2
*2
*2
2.0 mm
2
min.
2.0 mm
2
min.
2.0 mm
2
min.
2.0 mm
2
min.
Noise Filter
*3
FG
CN2
CN3 CN4
*4

YASKAWA E-S Series Specifications

General

Brand	YASKAWA
Model	E-S Series
Category	Servo Drives
Language	English