4-31
4-3 Wiring Conforming to EMC Directives
4
System Design
Noise Filters for the Power Supply Input
Use a noise filter to attenuate external noise and reduce noise emitted from the Servo Drive.
Select a noise filter with a rated current that is at least two times greater than the effective load
current (the rated current of the main circuit power supply input given in
Note 1.
To attenuate noise at low frequencies below 200 kHz, use an isolation transformer and a
noise filter.
Note 2.
To attenuate noise at high frequencies over 30 MHz, use a ferrite core and a high-frequency
noise filter with a feed through capacitor.
Note 3.
If multiple Servo Drives are connected to a single noise filter, select a noise filter with a rated
current at least two times the total rated current of all the Servo Drives.
Noise Filters for Servomotor Output
Use noise filters without built-in capacitors on the Servomotor output lines.
Select a noise filter with a rated current at least two times the Servo Drive’s continuous output
current.
The following table shows the recommended noise filters for Servomotor output.
Note 1.
Servomotor output lines cannot use the same noise filters for power supplies.
Note 2.
Typical noise filters are made for power supply frequencies of 50/60 Hz. If these noise filters
are connected to the PWM output of the Servo Drive, an extremely large (about 100 times
larger) leakage current will flow through the noise filter’s condenser and the Servo Drive
could be damaged.
Maker
Model
Rated current
Applicable standards
Remarks
NEC TOKIN
GT-2050
5 A
UL, CSA, VDE, TUV
Single-phase
GT-2100
10 A
GT-2150
15 A
GT-2200
20 A
HFP-2153
15 A
UL, CSA, TUV
Three-phase
HFP-2303
30 A
Okaya Electric
Industries Co.,
ltd.
SUP-EW5-ER-6
5 A
UL, cUL, SEMKO
Single-phase
SUP-EW10-ER-6
10 A
SUP-EW15-ER-6
15 A
SUP-EW20-ER-6
20 A
SUP-EW30-ER-6
30 A
3SUP-HU10-ER-6
10 A
Three-phase
3SUP-HU20-ER-6
20 A
TDK
ZRCS2006-00S
6 A
UL, CSA, NEMKO
Single-phase
ZRCS2010-00S
10 A
ZRCS2020-00S
20 A
ZRCS2030-00S
30 A
Maker
Model
Rated current
Remarks
OMRON
3G3AX-NF001
6 A
For inverter output
3G3AX-NF002
12 A
