4-42
SIGNALS AND WIRING
4-8 Remedying Noise and High Harmonics
- SV Series User’s Manual -
● Precautions on noise filter installation and wiring
Be sure to abide by the following precautions on noise filter installation and wiring.
■ Grounding
In order to prevent false operations because of noises, be sure to use proper grounding.
● Grounding of motor frame
When servo motor is installed on machines, switching noise current may flow through the servo amplifier. In order to prevent
the influence, be sure to connect the frame terminal (FG) of servo motor to the grounding terminal of servo amplifier.
In addition, the grounding terminal of servo amplifier must be connected to grounding.
● I/O cable
When there is noise in I/O cables, the GND of the I/O cable should be processed with single-point grounding. When
wires of motor main circuit are gathered in the metal control panel, the control panel and the connection box should be
processed with single-point grounding.
1 Wiring of I/O should be separated. The two cables
can not be inserted into one duct or bundled
together.
2
Grounding wire of noise filter should be far from
output wire. In addition, do not insert the grounding
wire and output wire of noise filter or other signal
lines into one duct or bundle them together.
3Grounding wire of noise filter should be connected
to grounding block separately.
4When there is noise filter inside control panel, be
sure to connect the grounding wire of noise filter
and grounding wires of other equipments in the
control panel to the grounding block of the control
panel, and then process grounding.
Noise
filter
Noise
filter
Noise
filter
Noise
filter
h
ƻ
Noise
filter
Noise
filter
Can be next to
the input wiring.
h
ƻ
Noise
filter
Noise
filter
Servo amplifier
Servo amplifier
Servo amplifier
Servo amplifier
Shield grounding
Thick <
Short <
○
×
Noise
filter
Servo amplifier
Servo amplifier
Control panel
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