MDS-E/EH Series Instruction Manual
14 Appx. 5: EMC Installation Guidelines
504
IB-1501229-F
14.6 EMC Countermeasure Parts
14.6.1 Shield Clamp Fitting
The effect can be enhanced by connecting the cable directly to the earthing plate. Install an earthing plate near each panel's
outlet (within 10cm), and press the cable against the earthing plate with the clamp fitting. If the cables are thin, several can be
bundled and clamped together. Securely earth the earthing plate with the frame ground. Install directly on the cabinet or
connect with an earthing wire.
14.6.2 Ferrite Core
Noise can be suppressed by installing a ferrite core to the cable if the power cable and encoder cable, which are led from
outside of the control panel, are the noise sources.
Specify the frequency of radiated noise and select the ferrite with high impedance corresponding to the frequency.
By wrapping the cable around the ferrite core according to the cable diameter as shown in the example, the impedance rises,
obtaining a better effect.
< Example of use >
A B C Enclosed fittings
Ground Plate #D 100 86 30 Clamp fitting A x 2
Ground Plate #E 70 56 - Clamp fitting B x 1
L1
(maximum dimension when it is open)
L2
(reference dimension)
Clamp fitting A 25 (77)
Clamp fitting B 12 (54)
4
0
35
6
22
17.5
A
C
3
5
2
4
-
0
.
2
0
1
1
7
3
6
B
±
0
.
3
L1
3
0
L2
+
0
.
3
0
2
4
2- È
[Unit: mm]
(Note 1) Screw hole for wiring to earthing plate in cabinet.
(Note 2) The earthing plate thickness is 1.6mm.
hole
(Fitting A, B)
Installation hole
Clamp fittingEarthing plate
à£Outline drawing
5
M4 screw
1RWH
Shield sheath
Cable
Cable
Earthing plate
Peel the cable sheath at the
clamp section.
View of clamp section
Clamp fitting
Lead through one time
(one turn)
Lead through two times
(two turns)
Lead through three times
(three turns)
The clearance between the ferrite core and cable must be
as narrow as possible when winding a cable.
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