----- Original Message ----- From: "John Woodgate" <[email protected]>
>>"This product is intended to be supplied by a Listed Power Unit, marked >>with “Limited Power Source,” “LPS” and “Class II” on the unit, and output >>rated ..." >> > > It isn't in either standard. The manufacturer is using his initiative to > provide important information to the user. So far, this is not prohibited. > (;-) According to EN60950-1:2006 4.7.2.2 device can have no fire enclosure if its components are mounted on V-1 class material and are "supplied by limited power sources complying with 2.5". If device is mounted that way what is the other way for the manufacturer to ensure powering by LPS than asking for it in instruction ? He can limit power for most of his PCB, but far beginning elements (like power connector) are powered by power supply connected by the user and it must be LPS (if you don't wont to use fire enclosure). I have asked here for it year or two ago and found no solution for it. I was told that power socket mounted on PCB is not "plugs and connectors forming part of a power supply cord" needing no fire enclosure. So what is better: to mount power connector not at PCB but at short cable (plus fuse) or to ask for LPS ? Fortunately since than I had no to write any instruction, but my decision was that when I'll be writing one I will ask for LPS in it. What is the other solution ? Best Regards Piotr Galka - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
