Appendix 1. EMC Installation Guidelines
1.1 Introduction
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Appendix 1. EMC Installation Guidelines
Refer to the "EMC Installation Guidelines BNP-B8582-45" for details related to the drive section
(servo/spindle drive unit).
1.1 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.
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
Details
EN
Standards
Emission
Radiated noise
Restriction of electromagnetic noise radiated through
the air
Conductive
noise
Restriction of electromagnetic noise discharged from
power supply line
EN61000-6-4
(General
industrial
machine)
EN61800-3
(Motor
control unit)
EN55011
(CLASS: A)
Immunity
Static electricity
electrical
discharge
(Example) Regulation of withstand level of static
electricity electrical discharge
accumulated in human body
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
EN61000-6-2
(General
industrial
machine)
EN61800-3
(Motor
control unit)
EN61000-4-5