Mitsubishi Electric MELFA CR800 Series Instruction Manual page 142

8 APPENDIX
8.4 Appendix 4: EMC installation guideline
Outlines
8.4.1
The EMC directive is coerced from January 1, 1996, and it is necessary to attach the CE mark which shows
that the product is in conformity to directive.
Since the industrial robot is the component of the automation system, it considers that the EMC directive is
not the target product of the direct. However, because it is one of the main components, introduces the
method and components of the measures for conforming the automation system to the EMC directive.
And also we are carrying out the qualification test about the conformity of the EMC directive under the environment
based on the contents of this document. However, the noise level is changed by the kind of equipment
to be used, the layout, the construction of the controlling board, the course of wiring, etc. Therefore,
please confirm by the customer eventually.
EMC directive
8.4.2
The Mitsubishi Electric industrial robot follows the European EMC directive. EMC can be broadly classified into
two categories: EMI and EMS.
(1) Emission (EMI: Electromagnetic Interference).......The capacity not to generate the disturbance noise
which has a bad influence outside.
(2) Immunity (EMS: Electromagnetic Susceptibility)....The capacity which does not malfunction for the
disturbance noise from the outside.
Each contents are shown below.
Item Name
Emission Radiative noise disturbance
(EMI)
Electrical-conduction noise disturbance
Immunity Electrostatic discharge immunity test
(EMS)
Radiated, radio-frequency,
electromagnetic field immunity test
susceptibility test
Electrical fast transient burst immunity test
Immunity
induced radio-frequency fields
Power frequency magnetic field immunity
test
Voltage dips, short interruptions and
voltage variations immunity test
Surge immunity test
EMC measures
8.4.3
There are mainly following items in the EMC measures.
(1) Store into the sealed metal board.
(2) Grounding all the conductor that have floated electrically (makes the impedance low).
(3) Wiring so that the power source wire and signal wire are separated.
(4) Use the shield cable for the cable which wired outside of the metal board.
(5) Install the noise filter.
To suppress the noise emitted out of the board, be careful of the following item.
(1) Ensure grounding of the equipment.
(2) Use the shield cable.
(3) Separate the metal board electrically. Narrows the distance/hole.
The strength of electromagnetic noise emitted to environment is changed a lot by the shielding efficiency
of cable and the distance of metal board, so it should be careful.
8-132 Appendix 4: EMC installation guideline
to conducted distrurbances
Contents
The electromagnetic noise etc. which are emitted
to environs.
The electromagnetism noise etc. which flow out
of the power-supply line.
The noise from the electrified human body.
The electromagnetism
transceiver, the broadcasting station, etc.
The relay noise or the electromagnetism noise
etc. which are caused in power-supply ON/OFF.
The electromagnetism noise etc. which flow in
through the power source wire and the grounding
wire.
The electromagnetism noise with a power supply
frequency of 50/60 Hz etc.
The noise in the variation of the source voltage of
the power dispatching, etc.
The electromagnetism noise by the thunderbolt,
etc.
noise from the