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Emc Law And Ce Mark; Notes On The Emc Rule - Siemens SIROTEC Planning Manual

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10 EMC Law and CE Mark

10.1 Notes on the EMC rule

Validity of the EMC law
Compliance with the EMC law concerning the electromagnetic compatibility of
devices as an implementation of Guideline 89/336/EEC of the Council, dated May
rd
3
, 1989, is compulsory for devices which can cause electromagnetic failures or
whose operation can be impaired by such failures.
Marking
Devices which
can be operated independently or
are commonly available,
require the CE mark in conjunction with an EU declaration of conformity.
The CE mark is attached to the goods itself, to the packaging or in the
accompanying documents.
Devices which are supplied exclusively as vendor parts or spare parts for the
further processing by competent companies do not require any CE mark or EU
declaration of conformity in respect of the EMC law. In addition, CE mark is not
required for equipment which is assembled only on site (e.g. control cabinets).
Factory conformity
The radio interference and the noise immunity in equipment is dependent on
factors such as, e.g. factory assembly, device combination, cable laying, cable
length, etc., as well as product-specific factors. Checking the permissible EMC
thresholds with consideration of all these factors and their variations would result in
almost endless checking. Thus the EMC is ascertained on typical factory
configurations during factory assembly and confirmed by the appropriate
declaration of conformity.
!
Important
If the difference between the factory configuration of the machine and the factory
configuration in accordance with the CE declaration of conformity is so large that
more unfavourable EMC thresholds are to be expected when using the machine,
the EMC measurements must be repeated on site, if necessary. In this case,
please contact your local Siemens office.
© Siemens AG, 2004. All rights reserved
EMC Installation Guideline – Planning Guide (EMV) – 03.2004 Edition
10-55

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