11. OPTIONS AND AUXILIARY EQUIPMENT
11 - 37
(2) Noise reduction techniques
(a) Data line filter (recommended)
Noise can be prevented by installing a data line filter onto the encoder cable, etc.
For example, ZCAT3035-1330 by TDK, ESD-SR-250 by NEC TOKIN, GRFC-13 by Kitagawa
Industries, and E04SRM563218 by SEIWA ELECTRIC are available as data line filters.
As a reference example, the impedance specifications of the ZCAT3035-1330 (TDK) are indicated
below. This impedances are reference values and not guaranteed values.
Impedance [
Ω
]
[Unit: mm]
Outline drawing (ZCAT3035-1330)
Loop for fixing the
cable band
Lot number
Product name
TDK
39 ± 1
34 ± 1
13 ± 1
30 ± 1
10 MHz to 100 MHz 100 MHz to 500 MHz
80 150
(b) Surge killer (recommended)
Use of a surge killer is recommended for AC relay, magnetic contactor or the like near the servo
amplifier. Use the following surge killer or equivalent.
MC
SK
Surge killer
Relay
Surge killer
MC
ON
OFF
This distance should be short
(within 20 cm).
(Ex.) CR-50500 Okaya Electric Industries)
Rated
voltage
AC [V]
C
[µF ± 20%]
R
[
Ω
± 30%]
Test voltage
Dimensions [Unit: mm]
6 ± 1
300 or more
300 or more
Soldered
Band (clear)
AWG 18 Twisted wire
15 ± 1
48 ± 1.5
CR-50500
6 ± 1
16 ± 1
(18.5 + 5) or less
3.6
(18.
5 + 2) ± 1
250 0.5
50
(1/2 W)
Between terminals:
625 V AC, 50 Hz/60 Hz 60 s
Between terminal and case:
2000 V AC, 50 Hz/60 Hz 60 s
Note that a diode should be installed to a DC relay or the like.
Maximum voltage: Not less than four times the drive voltage of the relay or
the like.
Maximum current: Not less than twice the drive current of the relay or the
like.
-
+
Diode
RA
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