http://www.ieee-pses.org/symposium http://www.emc2004.org/
Folks, I thought I had addressed the recent points in my Email which I shall repeat again lest it got lost in the ether. While John may think it would be a good idea for the LVD to include a "Declaration of Incorporation" the existing LVD does not and the proposed LVD does not either (not yet at any rate!). Some people have written about passive WDM systems, but that begs the question of what is meant by “passive”. Certainly such systems can be passive because there is no electrical power delivered to the components in question, but that does not make them passive safety-wise. The whole point of a WDM system is that there are multiple numbers of optical signals being transmitted down a single optical fibre and these wavelengths are spatially very close together in the wavelength domain. I do not know because it has not been said, but I presume that the device in question takes signals from multiple fibres as an input and then outputs them onto a single fibre. In simple terms, what the device is doing is “adding together” the power of these input sources to create an output which has a higher optical power – and hence it is (potentially) a higher optical hazard. IEC 60825-2 deals specifically with such situations, which is why I mentioned it below. Of course, IEC 60825-2 is primarily aimed at operators of Optical Fibre Communications Systems and manufacturers of equipment that generate (or amplify) optical signals. However, from the point of view of being helpful to your customers it would be useful to take a look at this standard and provide relevant information. Regards, Richard Hughes Ralph, If you are already in Europe then you are correct, because the question of importation does not arise, so perhaps someone from the EU told you this? However, if you need to bring your product from outside the EU then it will be inspected upon entry to determine whether it meets EU requirements, which is when customs look for the CE marking. Of course, if your product only arrives on EU soil because it is in transit (e.g from the USA to Switzerland) then customs will not look for the CE marking. Clear now? The CE marking signifies that all EU Directives that require the fitting of a CE marking have been complied with. If there are no applicable CE marking directives that apply, then do not fit the CE marking: an example is a CD. It sounds like the product in question falls into this category. But please not think that just because there are no applicable CE marking Directives that there is no other legislation and no standards that apply - this is not true. For the product in question I would expect the manufacturer of the passive optical component to take into account EN 60825-2 (which is identical to IEC 60825-2) and provide appropriate warnings or installation instructions. Regards, Richard Hughes This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to [email protected] Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
