Mitsubishi Electric NZ2GFSS2 32D S1 User Manual page 202

Others
■Ferrite core
A ferrite core is effective for reducing radiated noise in the 30MHz to 100MHz frequency band.
It is recommended to install a ferrite core if a shielded cable extended out of the control panel does not provide sufficient
shielding effects.
Note that the ferrite cores must be attached at the position closest to the cable hole inside the control panel. If attached at an
improper position, the ferrite core will not produce any effect.
Install a ferrite core to each power cable as shown below.
• Ferrite core used for the tests conducted by Mitsubishi: ESD-SR-250 (manufactured by TOKIN Corporation), ZCAT3035-
1330 (manufactured by TDK Corporation)
Ex.
■Noise filter (power supply line filter)
A noise filter is a component which has an effect on conducted noise. Using the noise filter can suppress more noise. The
noise filter has the effect of reducing conducted noise of 10MHz or less.
Connect a noise filter to the external power supply of a main module and the external power supply of an extension module.
The damping characteristics of the noise filter should be equivalent to those of the TDK-Lambda RSEN-2006. However, this is
not necessary for use in Zone A defined in EN61131-2 standard.
The precautions for attaching a noise filter are described below.
• Do not bundle the cables on the input side and output side of the noise filter. If bundled, the output side noise will be
induced into the input side cables from which the noise was removed.
Filter
Input side
(power supply side)
Filter
• Ground the ground terminal of the noise filter to the ground point of the control panel with the shortest cable possible
(approximately 10cm).
APPX
200
Appendix 5 EMC, Low Voltage, and Machinery Directives
Input side
(power supply side)
Induction
Output side
(device side)
Output side
(device side)
• Wrong example
Noise is induced when the input and output cables are bundled.
• Correct example
Install the input and output cables separately.