Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 422

Noise reduction products
■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. These impedances
are reference values and not guaranteed values.
Impedance []
10 MHz to 100 MHz
80
39 ± 1
34 ± 1
TDK
Product name
Lot number
Outline drawing (ZCAT3035-1330)
■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.
OFF
ON
MC
Surge killer
Ex.
CR-50500 (Okaya Electric Industries)
C [F 
Rated
voltage 20%]
AC [V]
250 0.5
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.
+ -
RA
Diode
11 OPTIONS AND PERIPHERAL EQUIPMENT
420
11.14 Noise reduction techniques
[Unit: mm]
Loop for fixing the
cable band
MC
SK
Relay
This distance should be short
(within 20 cm).
R [ 
Test voltage Dimensions [Unit: mm]
30%]
50 (1/2W) Between
terminals: 625
V AC, 50 Hz/60
Soldered
Hz 60 s
Between
6 ± 1
terminal and
case: 2000 V
AC
50/60 Hz 60 s
100 MHz to 500 MHz
150
Surge killer
Band (clear) AWG 18 Twisted wire
15 ± 1
CR-50500
300 min. 48 ± 1.5
6 ± 1
300 min.
16 ± 1
3.6
(18.5 + 5) max.