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APPENDIX 9 EMC INSTALLATION GUIDELINES
Appendix 9.2 EMC Directives
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Appendix 9.2 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 not to malfunction due to obstructive noise from external source.
The details of each level are classified below in Table 1.
It is assumed that the Standards and test details required for a machine tool are the same as these.
Class Name Details EMC Standard
Radiated noise
Restriction of electromagnetic noise radiated
through the air
Emission
Conductive noise
Restriction of electromagnetic noise
discharged from power supply line
EN50081-2
EN61800-3
(Industrial
environment)
EN55011
(CLASS:A)
Static electricity
electrical discharge
Example)
Regulation of withstand level of static
electricity accumulated in human body
IEC61000-4-2
Radiation immunity
Simulation of immunity from digital wireless
telephones
IEC61000-4-3
Burst immunity
Example)
Regulation of withstand level of noise from
relay or live wire being inserted or removed
IEC61000-4-4
Conductive
immunity
Example)
Regulation of withstand level of noise
flowed from power supply wires, etc.
IEC61000-4-6
Power supply
frequency magnetic
field
Example)
Regulation of electromagnetic noise of
50/60Hz power supply frequency
IEC61000-4-8
Power supply dip
(fluctuation)
Example)
Regulation of power voltage drop
withstand level
IEC61000-4-11
Immunity
Surge
Example)
Regulation of withstand level of noise
caused by lightning
EN50082-2
EN61800-3
(Industrial
environment)
IEC61000-4-5