Appendix 1.2 Emc Directives - Mitsubishi Electric C70 Connection Manual

Appendix 1.2 EMC Directives

The EMC Directives largely regulate the following two items.
• Emission:Capacity to prevent output of obstructive noise that adversely affects external devices.
Immunity:Capacity to not malfunction due to obstructive noise from external source.
•
The details of each level are classified in the table below.
It is assumed that the Standards and test details required for a machine tool are the same as these.
Class Name
Emission
Radiated noise
Conductive
noise
Immunity
Static electricity
electrical
discharge
Radiation
immunity
Burst immunity
Conductive
immunity
Power supply
frequency
magnetic field
Power supply
dip (fluctuation)
Surge
EMC immunity zone covers Zone B (and Zone A).
Install a power supply to the CNC control unit within Zone B.
Details
Restriction of electromagnetic noise radiated through
the air
Restriction of electromagnetic noise discharged from
power supply line
(Example) Regulation of withstand level of static
electricity electrical discharge
accumulated in human body
(Example) Simulation of immunity from digital
wireless telephones
(Example) Regulation of withstand level of noise
from relay or plug and play
(Example) Regulation of withstand level of noise
flowed from power supply wires, etc.
(Example) Regulation of electromagnetic noise of 50/
60Hz power supply frequency
(Example) Regulation of power voltage drop
withstand level
(Example) Regulation of withstand level of noise
caused by lightning
Zon e C Zone B
C70 Connection Manual
Appendix 1.2 EMC Directives
EN Standards
EN61000-6-4
(General
industrial
machine)
EN61800-3
(Motor
control unit)
EN61000-6-2
(General
industrial
machine)
EN61800-3
(Motor
control unit)
Zone B indicates the power
supply stepped down from
the public electrical power
distribution network by two
steps or more of the
insulation transformer.
Z one A
EN55011
(CLASS: A)
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-6
EN61000-4-8
EN61000-4-11
EN61000-4-5
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