ARLACON MC300
MC300MAE
Control system
User's manual
19
Product code 1003418
2.6.1 The European EMC directive
The European Union requirements for EMC are stated in the EMC directive 89/336/EEC. The
purpose of this directive is to ensure that all “Relevant Apparatus” marketed in the European
Union have the same EMC margin in the same type of environment. Relevant apparatus is
defined as a product or installation having an independent function and being delivered to the
end user as such in the European Union. Such apparatus must also be marked with the CE
mark to show the end user that the product complies with relevant parts of the regulations.
The Machine Directive containing regulations of machine safety and structure, demands that
the machine complies with the requirements of the EMC directive. This means that emissions
from the machine (conducted and radiated) must be under the levels stated in the appropriate
basic standards and the immunity of the machine for interference must be on the levels stated
in these standards. These basic standards are:
EN50081-1
emissions, domestic and light industry
EN50081-2
emissions, industrial
EN50082-1
immunity, domestic and light industry
EN50082-2
immunity, industrial
It is not necessary to maintain the same levels inside the application. Therefore the regulations
do not apply to components and materials used in the machines as such. Also, the amount of
emitted interference increases as the number of components increases. This increase varies
according to the nature of the source.
While it is always necessary to maintain a suitable EMC margin inside the electrical system of
a machine to ensure the proper operation of the machine, the cost effective way to build an
EMC directive compliant machine is to design for the external connections and protection of
the machine to comply with the necessary requirements.
Typical methods to achive this are common filtering of power signals, appropriate housing
structure for components and equipment and use of suitable screening and cable types
together with correct grounding in the wiring of the system.
2.6.2 General installation guidelines
To help the machine manufacturer achieve compliance, ARLACON MC products have been
measured in test installation to pass the requirements of EN50081-2 and EN50082-2.
These installations are described in ARLACON MC manuals. By following these installation
practices the ARLACON components in the electrical system of the machine generally do not
obstruct compliance. In complex cases, where it is difficult to install according to all
instructions, and when the influence of other components must be considered, additional
testing may be necessary to ensure compliance.
2.6.3 System grounding
The applicable regulations for protective earth of the system should be obeyed to ensure
electrical safety.
Earth conductors used should be as short and large as possible and the must be able to carry
the maximum short circuit current in a fault situation.
The control system, other electrical equipment and the machine must be interconnected to a
common earth reference, the machine chassis earth.
