Hi Folks, I'm trying to determine the appropriate ratings for optocouplers to meet PELV isolation requirements from non-PELV low voltage circuits. EN 60204-1:2006+A1:2009 6.4.1 c states "live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separation shall be not less than that required between the primary and secondary circuits of a safety isolating transformer (see IEC 61558-1 and IEC 61558-2-6 );" The IEC 61558 standards are written for transformers and I'm not sure how that translates into specifications available for optos or to UL 1577 or EN/IEC60747-5-5 that some optos are approved to. I have seen UL reports testing optos to UL 1577 "single protection" or and "double protection" isolators. UL 1577 itself doesn't clearly define "single" and "double protection" and I'm currently waiting to hear back from UL on that.
I am using optos to switch on a non-PELV circuit from a PELV circuit. Does anyone know if optos approved to UL 1577 Single protection and/or Double protection and/or EN/IEC60747-5-5 meet the EN 60204-1 requirements for PELV isolation from non-PELV circuits? Thanks -Dave David P. Nyffenegger, PMP, SM-IEEE Product Development Manager Bell and Howell 3791 South Alston Avenue Durham, NC 27713 Phone: 919.767.6419 Web: www.bellhowell.net<http://www.bellhowell.net/> - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 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]>
