Panel Structure; Measures For Control Panel Body - Mitsubishi Electric MELDAS 600 Series Connection Manual

4. Panel Structure

The design of the panel is a very important factor for the EMC measures, so take the following measures
into consideration.

4.1 Measures 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.
(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.
Control panel
CAUTION
• Using screws to fix the plates that have been painted is the same as an insulated state. Peel
the paint and fix the screws.
APPENDIX 3 EMC INSTALLATION GUIDELINES
4. Panel Structure
Painting mask
Joining clearance: approx. 20cm
Mesh cover
(conductive sponge)
Opening
121