Appendix 2.4.2 Measures For Door; Appendix 2.4.3 Measures For Power Supply - Mitsubishi Electric M70V Series Connection Manual

MITSUBISHI CNC
Appendix 2 EMC Installation Guidelines

Appendix 2.4.2 Measures for Door

(1) Use metal for all members configuring the panel.
(2) When joining the door, use a gasket to lower the impedance of the contacting sections, or use a structure with a
large contact area as shown below.
(3) The EMI gasket or conductive packing must contact the metal surface uniformly and at the correct position.
(a) Use of gasket
Door
EMI gasket
(Note 1) When not using a gasket, ground the control panel grounding with a grounding wire to lower the door's
impedance.
(Note 2) Using screws to fix the plates that have been painted (attachment of packing) is the same as an insulated
state. Peel the paint and fix the screws.

Appendix 2.4.3 Measures for Power Supply

(1) Shield the power supply section and insert a filter to prevent the noise from flowing in or out. Selection of the noise
filter capacity will differ according to the drive unit and devices being used. Refer to the "EMC Installation
Guidelines" (BNP-B8582-45).
Conductive
noise
(Note 1) The conductive noise can be suppressed by inserting a noise filter, but the radiated noise will flow out.
(Note 2) The conductive and radiated noise can both be suppressed by adding a partition plate to the noise filter.
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(b) Large contact area
Door
Control
panel
Device
Flow out
Radiated
noise
AC input
NF
Conductive
Noise
noise
filter
Control panel
Contact area
Cross-section drawing
Device
Radiated noise
Partition
AC input
NF
plate
Noise
filter