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APPENDIX 9 EMC INSTALLATION GUIDELINES
Appendix 9.4 Panel Structure
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Appendix 9.4 Panel Structure
The design of the panel is a very important factor for the EMC countermeasures, so take the following
countermeasures into consideration.
Appendix 9.4.1 Countermeasures for control panel body
(1) Use metal for all members configuring the panel.
(2) When joining the top plate and side plates, etc., treat the welded or contacting sections so that the
impedance is reduced, and then fix with screws.
[CAUTION]
• Using screws to fix the plates that have been painted is the same as an insulated state.
Peel off the paint and fix the screws.
Plating mask
Joining clearance : Approx. 20cm
(3) Note that if the plate warps due to the screw fixing, etc., by that creating a clearance, noise could
leak from that place.
(4) Plate (nickel, tin) the metal plate surface at the grounding plate, and connect the connections with
a low impedance.
(5) If there is a large opening, such as ventilation holes, make sure to close the hole.
Opening
Mesh cover
(conductive sponge)
Control panel