Application Precautions; Noise Control - YASKAWA SGM Series User Manual

5.7 Application Precautions

5.7.1 Noise Control

J Example of Wiring for Noise Control
This SERVOPACK uses high-speed switching elements in the main circuit. It may be subjected
to switching noise from these high-speed switching elements if wiring or grounding around the
SERVOPACK is not appropriate. To prevent this, always wire and ground the SERVOPACK
correctly.
The SERVOPACK also has a built-in microprocessor (CPU). Therefore install a noise filter to
protect the microprocessor from external noise.
The diagram below shows an example of wiring for noise control.
J Grounding
200 VAC
3.5 mm
(0.005 in
min.
*
When using a noise filter, always observe the wiring instructions given in the next section.
Note 1. Use a wire (preferably a plain stitch copper wire) at least 3.5 mm
2. Use twisted-pair wires whenever possible for wires indicated by
Noise filter
2
2
)
(Casing)
• Operation relay sequence
• Signal generator circuit
(provided by user)
P
*
(Casing)
(Casing)
(See 2.
2 2
3.5 mm (0.005 in ) min. wire thickness
3.5 mm
Figure 5.4 Grounding
5 -13
SGDB
SERVOPACK
1CN 4CN
2 2
2 mm (0.003 in )
min.
(Casing)
(Casing)
2 2
(0.005 in ) min.
(Ground plate)
Ground: Ground to one point only
(less than 100 Ω)
2
(0.005 in
P
5.7 Application Precautions
Servomotor
(FG)
FG
2
3.5 mm
2
(0.005 in )
min.
2
3.5 mm
2
(0.005 in )
min.
2
) thick to ground the casing.
.
5