Omron OMNUC 88D-UP20HA, Руководство пользователя

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D
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 Features Recommended products
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. Use a fast-recovery diode with a
short reverse recovery time.
Fuji Electric Co., ERB44-06 or equiv-
alent
Thyristor
or
Varistor Thyristor and varistor are used for loads when induction
coils are large, as in electromagnetic brakes, solenoids,
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. Select varistor voltage as follows:
24-VDC system varistor: 39 V
100-VDC system varistor: 200 V
100-VAC system varistor:
270 V
200-VAC system varistor: 470 V
Capacitor
+ resistor Use capacitors and resistors for vibration absorption of
surge when power is cut off. The reset time can be
shortened by proper selection of the capacitor or resis-
tor. Used for 100/200-VAC circuit contactors. Okaya Electric Ind.
CR-50500 0.5
µ
F-50
Ω
CRE-50500 0.5
µ
F-50
Ω
S2-A-0 0.2
µ
F-500
Ω
Note Thyristors and varistors are made by the following companies. Refer to manufacturers documentation for
operating details. Thyristors: Ishizuka Electronics Co.
Varistors:
Ishizuka Electronics Co., Matsushita Electric Parts
D
Contactors
When selecting contactors, take into consideration the circuit’s inrush current and the momentary maxi-
mum current. The Servo Driver inrush current is 50 A, and the momentary maximum current is approxi-
mately twice the rated current. The following table shows the recommended contactors.
Maker Model Rated current Momentary maxi-
mum current
Coil voltage
OMRON
G6C-2BND 10 A --- 24 VDC
LY2-D 10 A --- 24 VDC
G7L-2A-BUBJ 25 A --- 24 VDC, 200 to 240 VAC
J7AN-E3 15 A 120 A 24 VDC
LC1-D093A60 11 A 200 A 24 VDC, 200/220 VAC,
200 to 240 VAC
D
Leakage Breakers
Select leakage breakers designed for inverters.
Since switching operations take place inside the Servo Driver, high-frequency current leaks from the
armature of the Servomotor. With inverter leakage breakers, high-frequency current is not detected,
preventing the breaker from operating due to leakage current.
When selecting leakage breakers, remember to also add the leakage current from devices other than
the Servomotor, such as machines using a switching power supply, noise filters, inverters, and so on.
For detailed information about the selection methods of leakage breakers, refer to catalogs provided by
manufacturers.
The following table shows the Servomotor leakage currents for each Servo Driver.
System Design and Installation
Chapter 2