Справочник Пользователя для Mitsubishi Electronics MDS-D-SPJ3

Appendix 4 - 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" of each NC Connection Manual.

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.

Radiated noise

Electromagnetic noise radiated through the air

EN61000-6-4
EN61800-3
(Industrial 
environment)

-----

Conductive noise

Electromagnetic noise discharged from power 
line

Static electricity electrical 
discharge immunity test

(Example) Withstand level of discharge of elec-
tricity charged in a human body.

EN61000-6-2
EN61800-3
(Industrial 
environment)

EN61000-4-2

Radiated radio-frequency magnetic 
field immunity test

(Example) Simulation of immunity from digital 
wireless transmitters

EN61000-4-3

Electrical fast transient/burst 
immunity test

(Example) Withstand level of noise from relays 
or connecting/disconnecting live wires

EN61000-4-4

Immunity to conducted disturbance 
induced by radio-frequency mag-
netic field

(Example) Withstand level of noise entering 
through power line, etc.

EN61000-4-6

Power supply frequency field 
immunity test

(Example) 50/60Hz power frequency noise

EN61000-4-8

Immunity test for voltage dip, short-
time power failure and voltage fluc-
tuation

(Example) Power voltage drop withstand level

EN61000-4-11

Surge immunity test

(Example) Withstand level of noise caused by 
lightning

EN61000-4-5