Danaher Motion Standalone MMC, Руководство по оборудованию

Страница: 161 / 182

Standalone MMC Hardware Manual 161
Danaher Motion
version 15.1
CE and EMC Guidelines
11 CE and EMC Guidelines
11.1 Background on EMC (Electromagnetic Compatibility) Compliance
In order to market products in the European Union after January 1, 1996, an
electromagnetic compatibility directive (EU Directive 89/336/ECC) must be met. All
products must be designed and manufactured in such a way that:
• Electromagnetic disturbances generated by the products do not cause interfer-
ence to other systems.
• The performance of the product is not affected by electromagnetic disturbances
within the environment in which the product is intended to operate.
The directive refers to relevant harmonized European EMC standards against which
product conformity can be assessed, although other methods of assessment, notably
the preparation of a Technical File, are permissible. The equipment manufacturer or
the manufacturer’s agent in the Community must make a Declaration of Conformity
and can place the CE mark on the product. Failure to conform with the requirements
of the directive can result in a total ban on sales throughout the Single Market and
legal action could be taken against the signatory of a false declaration of conformity.
11.2 Background on Low Voltage Compliance
In order to market products in the European Union after January 1, 1997, the low
voltage directive (EU Directive 73/23/EEC) must be met.
The intention of the directive is to assure user safety under normal operating and fault
conditions. The directive includes the use of certain warning labels and user
instructions. It establishes limits to prevent electrical shock hazard, overheating and
fire.
11.3 RFI Emission and Immunity
The EMC product characteristics are classified by the emission and immunity
performance.
Emissions not only include radiated noise from the product enclosure and cabling, but
also that which is conducted away from the product along the cables connected to it.
This may be subsequently radiated from the cable or conducted directly into another
product which shares this cable e.g. the main AC supply.
Immunity is how susceptible a product is (e.g. to the radiated and conducted
emissions from the product mounted next to it). To ensure compatibility, the immunity
of a product must always exceed the expected emissions in the environment in which
it operates as is shown in the diagram below. This is to ensure a margin of safety.
NOTE
The CE mark on PiC products assures compliance with both the EMC and
low voltage European directives. Prior to this CE mark, EMC on the product
label only assured compliance with the EMC directives.