Mitsubishi Electric NZ2GF2S-60MD4 User Manual page 143

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 multiple input module that is connected to the external power supply and CC-Link IE Field Network
cables, attach a ferrite core 4cm apart from the module.
(Ferrite core used for the tests conducted by Mitsubishi Electric Corporation: NEC TOKIN ESD-SR-250, TDK ZCAT3035-
1330)
Ex.
Example
■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 a multiple input module. Use a noise filter with the damping
characteristics equivalent to those of MA1206 (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.
Input side
(power supply side)
Filter
Input side
(power supply side)
Filter
• Ground the noise filter grounding terminal to the control panel with the shortest cable possible (approx. 10cm).
Induction
Output side
(device side)
Output side
(device side)
• Defect example
When input wiring and output wiring are bundled, noise is induced.
• Improvement example
Carry out cable laying taking the distance between input wiring and output
wiring.
Appendix 7 EMC and Low Voltage Directives
A
APPENDICES
141