Omron OMNUC R88D-WT15HF User Manual page 239

System Design and Installation
Maker
Matsushita Electric
Ishizuka Electronics Co.
Note 1. The (W) for the Matsushita models indicates that they are UL and CSA certified.
Note 2. Refer to the manufacturers' documentation for operating details.
Note 3. The surge immunity is for a standard impulse current of 8/20 µs. If pulses are wide, either decrease the
current or change to a larger-capacity surge absorber.
Note 4. The energy resistance is the value for 2 ms. It may not be possible to retard high-energy pulses at less
than 700 V. In that case, absorb surges with an insulated transformer or reactor.
D Noise Filters for Power Supply Input
Use a noise filter to attenuate extraneous noise and to diminish noise radiation from the Servo Driver.
Select a noise filter with an effective load current of at least twice the rated current. The effective load
current is the total of the rated currents for the main circuit power supply input and the control circuit
power supply input given in 3-2-3 Terminal Block Wiring. The following table shows noise filters that
reduce by 40 dB noise between 200 kHz and 30 MHz.
Type
Single-phase g p
GT-2050
LF-210N
LF-215N
LF-220N
Three-phase p
LF-315K
LF-325K
LF-335K
LF-380K
ZCW2210-01
ZCW2220-01
ZCW2230-01
ZCW2240-01
ZACT2280-ME
Note 1. To attenuate noise at frequencies of 200 kHz or less, use an insulated transformer and a noise
filter. For high frequencies of 30 MHz or more, use a ferrite core and a high-frequency noise
filter with a through-type capacitor.
Note 2. If multiple Servo Drivers are to be 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 Drivers.
D 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 total rated current of the Servo Driver's continuous output current.
The following table shows the noise filters that are recommended for Servomotor output.
3-24
Model Varistor
voltage
ERZC20EK471(W) 470 V
ERZC25EK471(W) 470 V
ERZC32EK471(W) 470 V
Z25M471S 470 V
Z33M471S 470 V
Model Rated current
5 A
10 A
15 A
20 A
15 A
25 A
35 A
80 A
10 A
20 A
30 A
40 A
80 A
Max. limit Surge
voltage immunity
775 V 5,000 A
775 V 10,000 A
775 V 20,000 A
775 V 10,000A
775 V 20,000 A
Maker
NEC TOKIN
NEC TOKIN
TDK
Chapter 3
Energy Type
resistance
150 J Block
225 J
405 J
Block
235 J
385 J