Piotr, You don't have to be an expert in 60950-1 to interpret the TUV report. You only need to know which section of 60950-1 defines the requirements and tests for SELV and then see that those clauses are marked as passed in the TUV report or otherwise Not Applicable if the manufacturer does not claim to meet SELV. Really only the parent SELV clause needs to be checked, all the subordinate clauses should have the same results of passed or not applicable.
-Dave -----Original Message----- From: Piotr Galka [mailto:piotr.ga...@micromade.pl] Sent: Thursday, November 23, 2017 7:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Safe powering 12V doorlock Hi Rich, Thanks for confirming that isolation in doorlock can be only functional. This eliminates me one conception that 12V can be ELV, but second isolation is in doorlock. So now, as I'm sure that 12V have to be SELV/PELV I have to ask them if it is. I know that for other supplies they specify that output is SELV but here not, but they write that application can be access control so doorlocks.... There are TUV certificates at this supply page, but not report. I don't know if I will be able to read with enough understanding the TUV report. I have never seen one. Best Regards Piotr W dniu 2017-11-23 o 02:28, Richard Nute pisze: > Hi Piotr: > > The easy way to answer your questions is to request a copy of the TUV report. > > 1. I suppose that 12 doorlock manufacturer can use only functional isolation > betwean 12V and its metal casing as he can assume (I think) that he gets safe > voltage. > If I'm wrong with it let me know. > > Yes, only functional insulation between the 12 volts and the metal casing. > > 2. Then as doorlock metal casing can be touched by user than 12V have to be > SELV circuit I think. > > Yes. SELV or PELV; makes no difference. > > 3. I'm not sure if the 12V output from this supply is SELV - is it enough to > test the isolation with 3kV. > > No, 3 kV alone is not sufficient. The isolation must also meet creepage and > clearance distances after being subject to a mechanical test of the isolation > means and the conductors. > > 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 <emc-p...@ieee.org> > > 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 <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
