Omron OMNUC FND Series User Manual page 95

Design and Installation
Noise Filters for Servomotor Output
For Servomotor output lines, use a filter type without a built-in capacitor.
The following table shows recommended noise filters for Servomotor output lines.
Maker
Tokin
Fuji Electrochemical
Note The same noise filter cannot be used for Servomotor output lines as for the power supply.
Caution Ordinary noise filters are created for a power supply frequency of 50/60 Hz, so con-
!
necting an output of 10 kHz (the Position Driver's PWM frequency) can generate an
extremely high (approximately 100 time the normal) leakage current flow to the ca-
pacitor in the noise filter and cause damage to the Position Driver.
Surge Killers
Install surge killers for loads that have induction coils, such as relays, solenoids, brakes, clutches, etc.
The following table shows types of surge killers and recommended products.
Type
Diode Diodes are relatively small devices such as relays used
for loads when reset time is not an issue. The reset time
is increased because the surge voltage is the lowest
when power is cut OFF. Used for 24/48-VDC systems.
Thyristor Thyristor and varistor are used for loads when induction
or coils are large, as in electromagnetic brakes, solenoids,
Varistor etc., and when reset time is an issue. The surge voltage
when power is cut OFF is approximately 1.5 times that
of the varistor.
Capacitor Use capacitors and resistors for vibration absorption of
+ resistor surge when power is cut OFF. The reset time can be
shortened by proper selection of the capacitor or resis-
tor.
Note Thyristors and varistors are made by the following companies. Refer to manufacturers documen-
tation for operating details.
Thyristors: Ishizuka Electronics Co.
Varistors: Ishizuka Electronics Co., Matsushita Electric Industrial Co.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Model
LF-310KA
LF-320KA
ESD-R-47B
RN80UD
Features
Rated current
10 A
20 A
---
---
Recommended products
Use a fast-recovery diode with a
short reverse recovery time.
Fuji Electric Co., ERB44-06 or equiv-
alent
Select varistor voltage as follows:
24-VDC system varistor:
100-VDC system varistor:
100-VAC system varistor:
200-VAC system varistor:
Okaya Electric Industrial Co.
CR-50500
CRE-50500 0.5 µF-50 Ω
S2-A-0
Chapter 2
Remarks
3-phase block noise filter
EMI core for radiation
noise
10 turns for radiation
noise
39 V
200 V
270 V
470 V
0.5 µF-50 Ω
0.2 µF-500 Ω
2-71