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5.4.2 Wiring for Noise Control
(1) Wiring Example
The SGDS 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 appro-
priate. To prevent this, always wire and ground the SERVOPACK correctly.
The SGDS 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.
Noise filter ∗3
2LF
200 VAC
∗1
2
3.5 mm
2
(0.005 in
)
min.
∗1
For ground wires connected to the casing, use a thick wire with a thickness of
at least 3.5 mm (0.005 in ) (preferably, plain stitch cooper wire)
∗2
∗3
When using a noise filter, follow the precautions in (3) Using Noise Filter.
Operation relay
sequence circuit
∗3
∗2
AVR
1LF
(Ground)
2
2 mm
(0.003 in
(Casing)
(Casing)
(Casing)
3.5mm
2
Wires of 3.5 mm
∗1
2
(0.005 in
) or more
(Casing)
2
2
should be twisted-pair wires.
Ferrite core (two turns)
SGDS
SERVOPACK
L1
U
V
L2
W
L3
L1C
CN2
L2C
CN1
2
2.0 mm
2
(0.003 in
)
min .
2
3.5mm
2
(0.005 in
)
min.
2
) min.
∗ 1
2
2
(0.005 in
) min.
(Ground plate)
Ground: Ground to an independent ground
(at least class-3 grounding (100 Ω max.)
5.4 Special Wiring
Host controller
Servomotor
M
(FG)
PG
5-13
5
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