the New CE Marking EMC Requirements
Cutler and Chris Zombolas
is essential that manufacturers assess their compliance
documentation against the requirements of the new standards.
the EMC Directive was first mandated back in 1996, the list of harmonized
standards was rather short. In the early days of the EMC Directive,
there were a number of emissions standards based on IEC CISPR standards.
However, except for the IEC 1000 series of basic EMC standards,
product-specific or product family immunity standards just did not
plays an important role in EMC compliance. Shielding courtesy
of Spira Manufacturing Corp. (North Hollywood, CA).
left European manufacturers, suppliers, and the European Commission
in a difficult position. With this mandate, it was very difficult
for manufacturers to demonstrate that their products would meet
the essential requirements of the directive when no immunity standards
had been harmonized. To overcome this problem, CENELEC introduced
generic emissions standards (EN 50081-1 and EN 50081-2) and immunity
standards (EN 50082-1 and EN 50082-2) covering two environments:
the residential, commercial, and light industry environment and
the heavy industry environment.
the generic immunity standards covered only a limited number of
tests (radiated immunity, electrostatic discharge, and electrical
fast transient bursts), but in 1997 the range was extended to include
all of the common immunity standards.
Mandatory Generic Standards
four generic standards have been updated and renumbered to conform
to the IEC numbering system. The old versions will be removed from
the list of European harmonized standards and will not be available
for CE marking purposes.
EN 50081 and EN 50082 range of standards reached their date of withdrawal
in July 2004. These standards can no longer be used to presume conformity
to the EMC Directive. Table I shows the new standards that must
now be used.
Generic Immunity, Residential etc.
Generic Immunity, Industrial etc.
Emissions, Residential etc.
Generic Emissions, Industrial etc.
I. The new standards as of July 2004.
does it mean if you have not modified your product since it was
originally tested and declared to the old EN 50081 or EN 50082 standards
back in 1999?
as of July 2004, the product could no longer be sold into Europe.
The presumption of conformity no longer exists. A new declaration
of conformity (DoC) will be required, declaring compliance with
the new standards. To continue selling the product, it would seem
that the product would need to be retested to the new versions of
the standards. This is one option—and it may be worth considering,
especially if the product has been modified over the years but never
sufficiently for a full test to be carried out.
no changes have been made to the product, the most prudent course
of action would be to compare the new standard with the old standard
and carry out difference testing to cover the clauses introduced
by the new standards. In many cases, extra testing will not be required,
but this will depend on the specific characteristics of the product.
no additional testing is required, then a note should be made in
the compliance file. The note should indicate that the evaluation
has been undertaken, that there are no differences, and that a presumption
of conformity to the new standard can be made based upon the existing
test report to the EN 50081 or EN 50082 versions. It will also be
necessary to update the DoC, especially if the original declaration
contained a reference to the old standards that were used as the
basis for making the declaration.
Versus New Generic Standards
are a number of important differences between the old and new versions
of the standards. Many minor changes have been made, so it is imperative
that manufacturers read the standards carefully to note less-obvious
changes. Some changes may only become apparent for specific products.
The major differences for each standard are noted below.
Immunity—Residential Environment: EN 61000-6-1 versus EN 50082-1.
electromagnetic keyed carrier tests are no longer required for the
radiated immunity tests.
voltage dips and interrupts timing is now in units of periods rather
Immunity—Heavy Industry Environment: EN 61000-6-2 versus EN
50082-2. Major changes:
new standard has no additional testing annex tables.
2 and 3 of EN 50082-2 have been combined into one table, which is
now known simply as signal ports.
electromagnetic keyed carrier tests are no longer required.
surge testing is now required on signal, dc, ac, and earth ports
fast transient bursts (EFT/B) testing on signal ports has been standardized
at ±1 kV.
testing on ac and earth ports is now required where applicable.
dips and interrupts testing is now required on ac ports.
Emissions—Residential Environment: EN 61000-6-3 versus EN
50081-1. Major changes:
new standard has no additional testing annex tables.
and harmonics testing is now carried out according to the EN 61000-3-2
and EN 61000-3-3 range of standards.
testing on signal, control, and dc power ports is now required.
Emissions—Heavy Industry Environment: EN 61000-6-4 versus
EN 50081-2. There are no significant differences between
the new and old standards.
of the four generic standards have changes that could significantly
affect the continued CE compliance of products being sold in Europe.
The changes have been in effect since July 2004, so manufacturers
should have checked the compliance of their products, including
those products already on the market. Many of the changes are not
merely editorial, and in some cases, changes may involve retesting
so that the presumption of conformity is maintained.
most important changes have been made to EN 50081-1 (replaced by
EN 61000-6-3) with the introduction of conducted-emissions limits
for external dc power ports and for signal ports. The limits and
method described introduce new test methods and procedures.
changes have also been made to EN 50082-2 (replaced by EN 61000-6-2)
where surge, EFT/B, and voltage dips and interrupts testing have
been introduced to ports that did not previously require testing.
doing nothing exposes manufacturers to the risk of noncompliance
and possible regulatory breaches. It is essential that manufacturers
review the existing test reports and compliance documentation and
assess them against the requirements of the new standards. If necessary,
difference testing should be performed and a new updated DoC must
Cutler is general manager of EMC Technologies NZ Ltd. (Auckland,
New Zealand). He can be reached at firstname.lastname@example.org.
Chris Zombolas is technical director of the EMC Technologies group
and is based in Melbourne, Australia. He can be reached at email@example.com.