11. OPTIONS AND AUXILIARY EQUIPMENT
11 - 44
(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, and GRFC-13 by Kitagawa
Industries 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 [ȍ]
10MHz to 100MHz 100MHz to 500MHz
80 150
[Unit: mm]
Outline drawing (ZCAT3035-1330)
Loop for fixing the
cable band
Lot number
Product name
TDK
39 ± 1
34 ± 1
(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
Voltage
AC [V]
C
[μF ±
20%]
R
[ȍ ±
30%]
Test voltage Dimensions [Unit: mm]
250 0.5
50 (1/2
W)
Between terminals: 625 V AC,
50/60 Hz 60 s
Between terminal and case:
2000 V AC
50/60 Hz 60 s
6 ± 1
300 mim 300 mim
Soldered
Band (clear) AWG18 Twisted wire
15 ± 1
48 ± 1.5
CR-10201
6 ± 1
16 ± 1
(18.5 + 5) max.
Note that a diode should be installed to a DC relay or the like.
Maximum voltage: Not less than 4 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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