Mitsubishi Electric NZ2MF2S1-32D User Manual page 136

Others
■Ferrite core
A ferrite core has the effect of reducing radiated noise in the 30MHz to 100MHz band. It is recommended to attach ferrite
cores if shielded cables coming out of the control panel do 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.
For the FG terminal on a module that is connected to the external power supply, and the Ethernet cable, attach a ferrite core
4cm away from the module.
(Ferrite core used for the tests conducted by Mitsubishi Electric Corporation: NEC TOKIN ESD-SR-250, TDK ZCAT3035-
1330)
Ex.
Attachment
■Noise filter (power supply line filter)
A noise filter is a component which has an effect on conducted noise. Attaching the 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 the module. Use a noise filter with the damping characteristics
equivalent to those of RSEN-2006 (manufactured by TDK-Lambda Corporation). Note that a noise filter is not required if the
module is used in Zone A defined in EN61131-2.
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 filtered.
Filter
Input side (power supply side)
Filter
• Ground the noise filter ground terminal to the control panel with the shortest cable possible (approx. 10cm).
• The cable length between the noise filter and the module must be 3m or shorter.
APPX
134
Appendix 6 EMC and Low Voltage Directives
Input side (power supply side)
Induction
Output side (device side)
Output side (device side)
• Problematic example
Noise is induced when the input and output cables are bundled.
• Modification example
Install the input and output cables separately.