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Appendix 2 EMC Installation Guidelines
MITSUBISHI CNC
162
For details of the drive section (servo/spindle drive unit), refer to the "EMC Installation Guidelines" of instruction manuals
for each drive unit.
Appendix 2.1 Introduction
EMC Directives became mandatory as of January 1, 1996. The subject products must have a CE mark attached
indicating that the product complies with the Directives.
As the NC unit is a component designed to control machine tools, it is believed that it is not a direct EMC Directives
subject. However, we would like to introduce the following measure plans to back up EMC Directives compliance of the
machine tool as the NC unit is a major component of the machine tools.
(1) Methods of installation in control/operation panel
(2) Methods of wiring cables to outside of panel
(3) Introduction of members for measures
Mitsubishi is carrying out tests to confirm the compliance to the EMC Directives under the environment described in this
manual. However, the level of the noise will differ according to the equipment type and layout, control panel structure and
wiring lead-in, etc.
Thus, we ask that the final noise level be confirmed by the machine manufacturer.
Appendix 2.2 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 Details EN Standards
Emission
Radiated noise
Restriction of electromagnetic noise radiated through
the air
EN61000-6-4 (General
industrial machine)
EN61800-3 (Motor
control unit)
EN55011
(CLASS: A)
Conductive noise
Restriction of electromagnetic noise discharged from
power supply line
Immunity
Static electricity
electrical discharge
(Example) Regulation of withstand level of static
electricity electrical discharge accumulated in human
body
EN61000-6-2 (General
industrial machine)
EN61800-3 (Motor
control unit)
EN61000-4-2
Radiation immunity
(Example) Simulation of immunity from digital
wireless telephones
EN61000-4-3
Burst immunity
(Example) Regulation of withstand level of noise from
relay or plug and play
EN61000-4-4
Conductive immunity
(Example) Regulation of withstand level of noise
flowed from power supply wires, etc.
EN61000-4-6
Power supply
frequency magnetic
field
(Example) Regulation of electromagnetic noise of 50/
60Hz power supply frequency
EN61000-4-8
Power supply dip
(fluctuation)
(Example) Regulation of power voltage drop
withstand level
EN61000-4-11
Surge
(Example) Regulation of withstand level of noise
caused by lightning
EN61000-4-5