Parts Of Measure Against Noise - Mitsubishi Electric R64MTCPU User Manual

Parts of measure against noise

Ferrite core
A ferrite core has the effect of reducing 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.
■Ferrite core (Recommended product)
Manufacturer
TDK
Noise filter (power supply line filter)
A noise filter is a component which has an effect on conducted noise. The attachment of the noise filter to the power supply
line of the servo amplifier and Multiple CPU system's power supply is effective for the reducing noise. (The noise filter has the
effect of reducing conducted noise of 10 MHz or less.)
■Noise ferrite (Recommended product)
Manufacturer
Mitsubishi electric
Soshin Electric
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.
Noise filter
Bundled example
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. 10cm (3.94 inch)).
7 EMC DIRECTIVES
72
7.1 Requirements for Compliance with the EMC Directive
Input side Input side
(power supply side) (power supply side)
Induction
Output side
(device side)
Model name
ZCAT3035-1330
Model name
FR-BLF
HF3010A-UN
Noise filter
Non-bundled example
Separate and lay the input and output
wires.
Output side
(device side)