Yaskawa Large Capacity Sigma II Series - Manual (Page 177)

4.8 Special Wiring
4-101
4
4.8.2 Wiring for Noise Control
„ Wiring Example
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 SERVO-
PACK correctly.
This SERVOPACK has a built-in microprocessor (CPU), so it is necessary to protect it from
external noise as much as possible by installing a noise filter in the appropriate place.
The following is an example of wiring for noise control.
* 1. For ground wires connected to the casing, use a thick wire with a thick-
ness of at least 3.5 mm 2 (0.005 in 2 ) (preferably, plain stitch cooper
wire).
* 2. For wires indicated by use twisted-pair wires whenever possible.
* 3. When using a noise filter, follow the precautions in „ Using Noise Fil-
ters (page 4-102).
SERVOPACK
SGDH
Servomotor
Wires of 3.5mm
(0.005 in ) or more 2
2 *1
(Casing) (Casing) (Casing)
(Casing)
(Ground plate)
Ground: Ground to an independent ground
(100
Ω max.)
z Operation relay
sequence
z Signal generation
circuit (provided
by user)
(Ground)
*1
(Casing)
380 to
480 VAC
Noise filter *3
2
2
2.0 mm (0.003 in ) min. 2 2
3.5 mm
(0.005 in )
min. 2
2
2.0 mm
(0.003 in )
min. 2
2
*1 2 2
M
(FG)
U
W
V L2
L1
L3
CN2
1LF
AVR
*2
2LF
PG
*3
0V
+
-
24 VDC
DC24P
DC24N
380 to 480 V
3.5 mm (0.005 in ) min.
3.5 mm
(0.005 in )
min.