Measures For Panel Structure; Measures For Control Panel Unit - Mitsubishi Electric MDS-EX-CVP Series Technical Specification And Instruction Manual

MDS-EX-CVP Series Specifications and Instruction Manual
13. Appx.3: EMC Installation Guidelines

13.4 Measures for Panel Structure

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

13.4.1 Measures for Control Panel Unit

[1] Use metal for all materials configuring the panel.
[2] For the joining of the top plate and side plates, etc., mask the contact surface with paint, and fix with welding or screws
so that the impedance is reduced. In either case, keep the joining clearance to a max. of 20cm for a better effect.
Note that if the plate warps due to the screw fixing, etc., creating a clearance, noise could leak from that place.
[3] Plate the earth plate (with nickel, tin), and connect the connections with a low impedance.
[4] If there is an opening on the panel surface, such as the ventilation holes, cover it with a metal plate or expanded metal.
Make sure not to connect using metal or a conductor without peeling off the surface, which results in an insufficient
electrical connection. (ex. connection by putting painted surfaces together)
IB-1501587-A
Painting mask
Example
Opening
Max. joining clearance
20cm or less
Painting mask
Metal plate or
expanded metal
* Provide electrical conductance
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