Yaskawa Sigma Mini - Manual (Page 113)

2.8Special Wiring
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2.8.2 Wiring for Noise Control
Example of Wiring for Noise Control
This Servopack uses high-speed switching elements in the main circuit. It may receive
“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 correct-
ly.
This Servopack has a built-in microprocessor (CPU). To protect the microprocessor from ex-
ternal noise, install a noise filter in place.
The following is an example of wiring for noise control.
Noise filter *
Servomotor
Servopack
(Casing)
• Operation relay sequence
• Signal generation circuit
(provided by customer)
Wire with a thickness of
3.5 mm 2 or more
Ground plate
Ground: One-line ground (ground to 100 Ω or less)
(Casing) (Casing)
(see note 2)
(Casing)
(Casing)
100 or
200 VAC
3.5 mm 2
or more
3.5 mm 2
or more CN2
CN1
AC/DC
power
supply
2 mm 2 or more
3.5 mm 2 or more
CN2
U
V
W
PG
M
* When using a noise filter, always observe the following wiring instructions:
Note 1) For a ground wire to be connected to the casing, use a thick wire with a thickness of at
least 3.5 mm 2 (preferably, plain stitch copper wire).
2) For wiring indicated by , use twisted-pair cable whenever possible.
2