Mitsubishi Melsec-Q Series User Manual page 209

9.1.6 Others
(1) Ferrite core
A ferrite core has the effect of reducing radiated noise in the 30MHz to 100MHz band.
It is not required to fit ferrite cores to cables, but it is recommended to fit ferrite cores if shield cables pulled out of
the enclosure do not provide sufficient shielding effects.
Note that the ferrite cores must be fitted to the cables in the position immediately before they are pulled out of the
enclosure. If the fitting position is improper, the ferrite will not produce any effect.
(2) Noise filter (power supply line filter)
A noise filter is a component which has an effect on conducted noise.
It is not required to attach the noise filter to the power supply line except the A61PEU, A62PEU power supply
modules and some models, however, attaching it can suppress more noise.
(The noise filter has the effect of reducing conducted noise of 10 MHz or less.)
The precautions required when installing a noise filter are described below.
• Do not bundle the wires on the input side and output side of the noise filter. When bundled, the output side
noise will be induced into the input side wires from which the noise was filtered.
Filter
The noise will be included when the
input and output wires are bundled.
• Ground the noise filter grounding terminal to the control cabinet with the shortest wire possible (approx. 10
cm (3.94 inches)).
Remark
Noise filter model name
Manufacturer
Rated current
Rated voltage
Input side Input side
(power supply side) (power supply side)
Induction
Output side
(device side)
Figure 9.19 Precautions on noise filter
Table9.6 Noise filter specifications
FN343-3/01
SCHAFFNER
CHAPTER9 EMC AND LOW VOLTAGE DIRECTIVES
Filter
Output side
(device side)
Separate and lay the input
and output wires.
FN660-6/06
SCHAFFNER
3A 6A
250V
9
2
3
4
5
6
7
8
ZHC2203-11
TDK
3A
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