Let's take an example - a motor operated business machine that contains digital logic. In my opinion, it must be judged under the generic emissions standard because it produces both continuous and discontinuous interference. The applicable sections of EN55022 and EN55014 must be met. The same would apply if you had a motor operated ISM device except that EN55011 and EN55014 would apply.
> ---------- > From: F.Goto[SMTP:[email protected]] > Reply To: F.Goto > Sent: Friday, July 17, 1998 6:11 AM > To: [email protected] > Subject: EN61000-3-2, EN55022 and EN55011 > > Dear Group, > > Here are a couple of questions from our EMC department. > > 1) EN61000-3-2 Clause 7.4. states that "The limits given in table 3 are > valid for all applications having an active input power >75W. No limits > apply for equipment with an active input power up to and including 75W. > This lower limit of 75W will be reduced to 50W, four years after the > implementation date of this standard." Does anyone know when this 4 year > period starts? (from 1995 when the standard was issued, or from January > 1, > 2001 when the standard becomes mandatory? > > 2) Can someone make clear the discontinuous interference limits for > EN55022,EN55011? Generic standards (EN50081-1 and EN50081-2) has limits > for > discontinuous interference referencing EN55014, but EN55022 nor En55011 do > not. Another complication arises when there is a specific product > standard, > in which case we shouldn't use a generic one. > > Any help on the above will be appreciated. > > Sincerely, > Frank F. Goto > A-pex International Co., Ltd. > 1st Engineering Department > 248-1 Kusube-cho > Ise-shi, Mie-ke 516-0014 > Japan > Tel: +81-596-24-6717 > Fax:+81-596-27-5631 > [email protected] > http://a-pex.co.jp > >
