Yaskawa Junma Series SERVOPACK - Manual (Page 22)

3.1 Precautions on Wiring
E-21
English
„ Noise Prevention
Example of Wiring for Noise Prevention
* 1. A 100 VAC power supply can be used with a SERVOPACK version 03404 or firmware version 0004 or later.
* 2. For the wires connected to the casings for installation purposes, use wires with a diameter of 3.5 mm
2
or larger.
Flat braided copper wires are recommended.
* 3. Use twisted pair wires for section P.
Correct Grounding
• Servomotor frame grounding:
Be sure to connect the FG grounding terminal on the frame of the servomotor to the grounding terminal on the
SERVOPACK.
• Be sure to ground the grounding terminal of the SERVOPACK.
• If the wires of the servomotor’s main circuit are laid in a metal conduit, ground the conduit and the grounding
box.
One-point grounding must be used.
M
(FG)
U
W
V
L2
L1
CN2
CN1
SERVOPACK
SJDE
Servomotor
Operation relay sequence
P
P P 1LF
AVR
(Ground
-ing)
*3
Casing
Casing
Casing
*2
*2
Casing
Grounding plate
Groudning: Ground to one point only.
Min. grounding resistance: 100
Ω
2LF
Min. wire size
: 3.5 mm
2
Min. wire size
: 3.5 mm
2
Min. wire size
: 3.5 mm
2
Min. wire size: 3.5 mm 2
Min. wire size: 3.5 mm 2
2 mm 2 or larger
Casing
PG
Noise filter
*2
User signal generating circuit
100 VAC
*1
200 VAC