Yaskawa Sigma II Series SGMVH - Manual (Page 143)

6 Wiring
6.4.2 Wiring for Noise Control
6-18
6.4.2 Wiring for Noise Control
(1) Wiring Example
The SERVOPACK uses high-speed switching elements in the main circuit. It may receive “switching noise”
from these high-speed switching elements if the processing of wiring or grounding around the SERVOPACK is
not appropriate. To prevent this, always wire and ground the SERVOPACK correctly.
The SGDH SERVOPACK has a built-in microprocessor (CPU), so protect it from external noise as much as pos-
sible by installing a noise filter in the appropriate place.
The following is an example of wiring for noise control.
When using a noise filter, follow the precautions in (3) Using Noise Filters.
* 1. For ground wires connected to the casing, use a thick wire with a thickness of
at least 3.5 mm (preferably, plain stitch copper wire).
* 2. : represents twisted-pair wires.
U
W
V L2/S
L1/R
L3/T
L3C/t
L1C/r CN2
SGDM/SGDH
SERVOPACK
Servomotor
Operation relay
sequence
Signal generation
circuit (provided by
customer)
1LF
AVR
(Ground)
(Casing)
(Casing)
(Casing) (Casing)
(Casing)
(Ground plate)
2LF
3.5 mm
min.
2
200 to 230
VAC
Noise filter
∗1
∗1
∗2
2 mm
2
min.
3.5 mm ޓmin. 2 ∗1
2.0 mm 2
min.
3.5 mm
min. 2
PG
(FG)
M
Wires of 3.5 mm
or more 2
Ground: Ground to an independent ground
(at least class-3 grounding (100
Ω max).)
2LF