Hi Christine:
So the $64,0000 dollar question is can you use a non-LPS in place of a LPS if they have the same rating? The ratings do not tell you whether the power supply is LPS or not. The ratings reflect the maximum normal operation of the power supply. LPS is a measure of the output voltage, current, and power under power supply fault conditions. The LPS marking is optional. If the power supply has the LPS marking, then you KNOW the power supply is LPS. If the power supply does not have the LPS marking, then you don't know whether the power supply is LPS or not. To determine whether the power supply is LPS, you will need to review the third- party certification report. The report will include the LPS tests and indicate that the output is LPS. If your product requires a LPS power supply, then the issue IS a both a compliance and a safety issue -- even though the ratings are the same. If the power supply is not LPS, then your product will require a fire enclosure. By the way, LPS means "Limited Power Source." Best regards, Rich - 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]>
