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
ޓ
min.
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
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