Measures For Door; Measures For Operation Board Panel; Shielding Of The Power Supply Input Section - 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

13.4.2 Measures for Door

[1] Use metal for all materials configuring the door.
[2] Use an EMI gasket or conductive packing for the contact between the door and control panel unit.
[3] The EMI gasket or conductive packing must contact at a uniform and correct position of the metal surface of the control
panel unit.
[4] The surface of the control panel unit contacted with the EMI gasket or conductive packing must have conductance
treatment.
(Example) Weld (or screw) a plate that is plated (with nickel, tin).
[5] As a method other than the above, the control panel unit and door can be connected with a plain braided wire. In this
case, the panel and door should be contacted at as many points as possible.

13.4.3 Measures for Operation Board Panel

[1] Always connect the operation board and indicator with an earthing wire.
[2] If the operation board panel has a door, use an EMI gasket or conductive packing between the door and panel to
provide electrical conductance in the same manner as the control panel.
[3] Connect the operation board panel and control panel with a sufficiently thick and short earthing wire.

13.4.4 Shielding of the Power Supply Input Section

[1] Separate the input power supply section from other parts in the control panel so that the input power supply cable will
not be contaminated by radiated noise.
[2] Do not lead the power line through the panel without passing it through a filter.
Drive unit
The power supply line noise is eliminated by the
filter, but cable contains noise again because of
the noise radiated in the control panel.
EMI gasket
Packing
Door
Control panel
Radiated
noise
Power line
AC input
Breaker AC 入力 AC 入力 AC 入力
filter
Control panel
Carry out conductance treatment on
sections that the EMI gasket contacts.
Drive unit
Use a metal plate, etc., for the shielding
partition. Make sure not to create a clearance.
55
Control panel
Radiated
noise
Shielding
plate
Power line
Breaker
AC input
filter
IB-1501587-A