Gert and Hans, In Hans's e-mail he specifies dc-dc convertors. In your e-mail, you specify ac-dc convertor. I assume you mean mains ac - dc.
For dc-dc there you need not purchase a medical grade convertor since I assume you will have reinforced insulation between the patient aplied part and the ac mains. For ac-dc, most convertors in the market are encapsulated and approved to ITE requirements. Some are approved for operational insulation between input and output, others for basic insulation between input and output and most for reinforced insulation between input and output. Per IEC 60 601-1 there are no internal creepage requirements and no long term aging tests for the encapsulation like in IEC 60 950. If you choose a regular ITE ac-dc which meets 4000 Vac dielectric strength betwen input and output and make sure you have the clearance/creepage requirements for reinforced insulation between input and output (8.0 mm clearance/creepage), then you have nothing to worry about for isolation between patient applied parts and the mains. Of course, leakage current is also an issue you have to take into consideration. This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -----Original Message----- From: Gert Gremmen [mailto:[email protected]] Sent: Saturday, September 14, 2002 12:07 PM To: Hans Mellberg; [email protected] Subject: RE: PCI low profile dc-dc May I add: Looking for a low profile ac-dc on board converter having a decent medical approval i.e. more then basic insulation between primary and secundary. Any suggestions for a manufacturer ? My client is located in Malaysia . Gert Gremmen ce-test -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Hans Mellberg Sent: vrijdag 13 september 2002 21:22 To: [email protected] Subject: PCI low profile dc-dc I am designing a PCI card that requires the use of several on-board dc-dc converters for 24V, 48V and a varialble V. Any suggestions to sources are greatly appreciated, Thanks in advance ===== Best Regards Hans Mellberg Regulatory Compliance & EMC Design Services Consultant By the Pacific Coast next to Silicon Valley, Santa Cruz, CA, USA office:831-454-9450, cell:408-507-9694, fax:831-454-0755 __________________________________________________ Do you Yahoo!? Yahoo! News - Today's headlines http://news.yahoo.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc 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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc 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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc 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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
