Справочник Пользователя для Mitsubishi Electronics MDS-R

 
 
 

 

 

A4 - 2

 
EMC Instructions became mandatory as of January 1, 1996. The subject products must have a CE mark 
attached indicating that the product complies with the Instructions. 
As the NC unit is a component designed to control machine tools, it is believed to be out of the direct 
EMC Instruction subject. However, we would like to introduce the following measure plans to backup 
EMC Instruction compliance of the machine tool as the NC unit is a major component of the machine 
tools. 
 
[1]  Methods for installation in control/operation panel 
[2]  Methods of wiring cable outside of panel 
[3]  Introduction of countermeasure parts 
 
Mitsubishi is carrying out tests to confirm the compliance to the EMC Standards 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. 
For measures for CNC, refer to "EMC INSTALLATION GUIDELINES" (BNP-B2230). 

 
 

 

The EMC Instructions regulate mainly the following two withstand levels. 

Emission .....  Capacity to prevent output of obstructive noise that adversely affects external 

sources. 

Immunity .....  Capacity not to malfunction due to obstructive noise from external sources. 

The details of each level are classified as Table 1. It is assumed that the Standards and test details 
required for a machine are about the same as these. 
 

Table 1 

Radiated noise 

Electromagnetic noise radiated through the air 

Conductive noise 

Electromagnetic noise discharged from power line

EN61000-6-4 

EN61800-3 

(Industrial 

environment) 

EN55011 

Static electricity 
electrical discharge 

Example)  Withstand level of discharge of 

electricity charged in a human body. 

IEC61000-4-2 

Radiated magnetic 
field 

Example)  Simulation of immunity from digital 

wireless transmitters 

IEC61000-4-3 

Burst immunity 

Example)  Withstand level of noise from relays or 

connecting/disconnecting live wires 

IEC61000-4-4 

Conductive 
immunity 

Example)  Withstand level of noise entering 

through power line, etc. 

IEC61000-4-6 

Power supply 
frequency field 

Example)  50/60Hz power frequency noise 

IEC61000-4-8 

Power dip 
(fluctuation) 

Example)  Power voltage drop withstand level 

IEC61000-4-11 

Surge 

Example)  Withstand level of noise caused by 

lightning 

EN61000-6-2 

EN61800-3 

(Industrial 

environment) 

IEC61000-4-5