M800W/M80W Series Connection and Setup Manual
41 Appx.4: EMC Installation Guidelines
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IB-1501268-K
41.3 EMC Measures
The following items mainly need to be taken into account as a countermeasure for EMC.
(1) Store the device in a sealed metal panel.
(2) Ground all conductors that are floating electrically. Decrease the impedance.
(3) Increase the distance between the drive line and signal wire.
(4) Shield the cables wired outside of the panel.
(5) Install a noise filter.
Pay attention to the following items to suppress the noise radiated outside of the panel.
(1) Accurately ground the devices.
(2) Use shielded cables.
(3) Increase the electrical seal of the panel. Reduce the gaps and holes.
41.4 Panel Structure
The design of the panel is a very important factor for the EMC measures. Take the following measures sufficiently into
consideration when creating a panel.
41.4.1 Measures for Control Panel Body
(1) Use metal for all members configuring the panel.
(2) When joining the metal plate, treat the welded or contacting sections so that the impedance is reduced, and then fix
with screws.
(3) Be careful not to bend the plate by such as screwing work. If there is a gap, noise leaks out from that part.
(4) Plate (nickel tin) the metal plate surface at the grounding plate, and connect the connection parts with the low
impedance.
(5) If there is a large opening, such as ventilation holes, make sure to close the hole.
(Note 1) Using screws to fix the plates that have been painted is the same as an insulated state. Remove the paint and
fix the screws.
Painting mask
Joining interval: approximately 20 cm
Mesh cover
(conductive sponge)
Opening
Control panel
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