3-35
w Noise Filter for Brake Power Supply
Use the following noise filter for the brake power supply. (Refer to the SUP-PjH-EPR diagram above
for dimensions.)
Model Rated current Rated voltage Leakage current Maker
SUP-P5H-EPR 5 A 250 V 0.6 mA (at 250 Vrms, 60 Hz) Okaya Electric
Industries Co.,
Ltd.
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-V DC 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-V DC system: 39 V
100-V DC system: 200 V
100-V AC system: 270 V
200-V AC system: 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.
Okaya Electric Industries Co., Ltd.
CR-50500 0.5 µF-50 Ω
CRE-50500 0.5 µF-50 Ω
S2-A-0 0.2 µF-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 Industrial Co.
D Contactors
When selecting contactors, take into consideration the circuit’s inrush current and the maximum mo-
mentary current. The Servo Driver inrush current is covered in the preceding explanation of no-fuse-
breaker selection, and the maximum momentary current is approximately twice the rated current. The
following table shows the recommended contactors.
Maker Model Rated current Coil voltage
OMRON
LC1D09106 11 A
200 V AC
LC1D25106 26 A
LC1D40116 35 A
LC1D50116 50 A
LC1D80116 80 A
LC1D09106 11 A
24 V DC
LP1D25106 26 A
LP1D40116 35 A
LP1D50116 50 A
LP1D80116 80 A
System Design and Installation
Chapter 3
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