It appears that my copy of 60950-1 is a bit old. It was hand written on a 
vellum scroll. My company antiquities director prohibits me from cutting off a 
piece for spectrographic analysis.

Ted Eckert
Microsoft Corporation

The opinions expressed are my own and do not necessarily reflect those of my 
employer.

From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: Wednesday, December 6, 2017 12:55 PM
To: Ted Eckert <ted.eck...@microsoft.com>; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Was there ever a comparison between IEC 60950-1 and IEC 
62368-1 (current edition preferable)? And any rationale for any of the changes


And if you print the standards, they are both made of paper. But it doesn't 
help. Steep learning curve!

John Woodgate OOO-Own Opinions Only

J M Woodgate and Associates 
www.woodjohn.uk<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.woodjohn.uk&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=17EpA6VWQ%2BsodkqHfCSq0a584%2B%2Ffio9Tfv5vJmxLDlA%3D&reserved=0>

Rayleigh, Essex UK
On 2017-12-06 19:48, Ted Eckert wrote:
A spectrographic analysis of a plum and coconut might find them to be quite 
similar.
https://www.improbable.com/airchives/paperair/volume1/v1i3/air-1-3-apples.html<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.improbable.com%2Fairchives%2Fpaperair%2Fvolume1%2Fv1i3%2Fair-1-3-apples.html&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=HnSQLDqXVWS5Zeox6ZoLTttcxpAvOVO%2B9wuo1mYhnaE%3D&reserved=0>

Ted Eckert
Microsoft Corporation

The opinions expressed are my own and do not necessarily reflect those of my 
employer.

From: Doug Powell [mailto:doug...@gmail.com]
Sent: Wednesday, December 6, 2017 11:32 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] Was there ever a comparison between IEC 60950-1 and IEC 
62368-1 (current edition preferable)? And any rationale for any of the changes

Back in the day, the question was asked: "What's the difference between an 
elephant and a plum?"  Answer: "They're exactly the same, except the elephant."




On Wed, Dec 6, 2017 at 12:19 PM, Pete Perkins 
<00000061f3f32d0c-dmarc-requ...@ieee.org<mailto:00000061f3f32d0c-dmarc-requ...@ieee.org>>
 wrote:
Leo,

                The requirements in 62368-1 are supported by the rationale 
document 62368-2 which more fully explains the basis for the requirements in 
the standard.  It has been put together to help standards committees – such as 
yours – understand these.

                There was an early on comparison between 60950 and 62368 
(already discussed here) which could be generally helpful but has not been kept 
up to the latest changes.

                The ongoing intent in 62368-1 has been to ensure that present 
practices should be acceptable under the new standard as long as they meet the 
requirements of the new standard.

                Most generally it probably can be assumed that they provide 
equivalent safety protection under each standard (altho there are some 
significant differences – e.g. the 10 or 100 uA touch current limits in 60601-1 
which are lower than the allowed limits of 0.5 and 5mA in 62368-1); so it may 
not immediately fall out from some simple discussion since there are many 
details in each standard which need to be compared unless you accept the 
general assumption.

                TC108 is still struggling with the issues surrounding moving 
from 60950 to 62368 details, such as how to accept components designed to 60950 
in the context of the new standard.  TC108 has, in the past, invoked additional 
requirements on components when it appeared that the component standard did not 
meet the expected requirements of the standard.  It is not unreasonable to do 
so again.  Altho TC108 has worked with SC22E on their Low Voltage Switch Mode 
Power Supplies safety standard, IEC 61207-7, and have achieved considerable 
harmonization in the requirements the inclusion of that as a normative standard 
within 62368-1 certification is not yet automatically accepted; awaiting the 
outcome of the related issues discussed here.

                SC62A should request to work with TC108 in your process of 
review and change.  This probably won’t work out for this week’s meeting but 
should provide you with a path to understanding how to incorporate these 
devices in your medical systems.

                Good luck in working thru all of this.

:>)     br,      Pete

Peter E Perkins, PE
Principal Product Safety & Regulatory Affairs Consultant
PO Box 23427
Tigard, ORe  97281-3427

503/452-1201<tel:%28503%29%20452-1201>

p.perk...@ieee.org<mailto:p.perk...@ieee.org>

From: Leo Eisner [mailto:l...@eisnersafety.com<mailto:l...@eisnersafety.com>]
Sent: Tuesday, December 5, 2017 4:40 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: [PSES] Was there ever a comparison between IEC 60950-1 and IEC 62368-1 
(current edition preferable)? And any rationale for any of the changes

I am in IEC SC62A (60601-1 series of standards - Medical electrical equipment & 
systems) meetings this week and we are trying to id the differences between 
these 2 standards so we can figure out how to integrate IEC 62368-1 into IEC 
60601-1, 3rd ed. + A2, if we have the time and agreement with the National 
Committees is to be determined. We are working on A2 currently (at CD1 stage) 
and initially we decided not to include IEC 62368-1 in the A2 but wait for 4th 
ed. but that likely may be too late for power supplies as 60950 is ending in a 
couple years for at least EU.

Thx all,


Leonard (Leo) Eisner, P.E.
Principal Consultant, Eisner Safety Consultants
Phone: (503) 244-6151<tel:%28503%29%20244-6151>
Mobile: (503) 709-8328<tel:%28503%29%20709-8328>
Email: l...@eisnersafety.com<mailto:l...@eisnersafety.com>
Website: 
www.EisnerSafety.com<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eisnersafety.com%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=Uwp%2F4lAovOLFvH%2FmYkyejxjODxGYatVXF5svzYEKajI%3D&reserved=0>


*************** Internet E-mail Confidentiality Disclaimer ***************
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.

Eisner Safety Consultants do not accept liability for any errors, omissions, 
corruption or virus in the contents of this message or any attachments that 
arise as a result of e-mail transmission.
*******************************************************************************

-
----------------------------------------------------------------

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<mailto:emc-p...@ieee.org>>

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=VERtLqFaa2Wa6b8bVDBV7WNBuVFMXEYO80qIl2IkZl8%3D&reserved=0>

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=5N2k3YHA9JKDUigFpSXo00kTXFtWarT0QpDZnTfEz1g%3D&reserved=0>
 can be used for graphics (in well-used formats), large files, etc.

Website: 
http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=vUyRsSbcrPO6n2uh1UcgRY08oOq9POOvCt0dKXKR1Jw%3D&reserved=0>
Instructions: http://www.ieee-pses.org/list.html (including how to 
unsubscribe)<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=8J5QV78%2Fwq4krsnRqpX4O9x0vy3%2BK00g5%2BLLSHkdsNo%3D&reserved=0>
List rules: 
http://www.ieee-pses.org/listrules.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=eTvHe6APW9fMpDApBVZUO%2FgfW%2BUrLvbGfS2Ke4tgVR0%3D&reserved=0>

For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>>
Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>>

For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>>
David Heald <dhe...@gmail.com<mailto: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 
&LT;emc-p...@ieee.org<mailto:emc-p...@ieee.org>&GT;

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=VERtLqFaa2Wa6b8bVDBV7WNBuVFMXEYO80qIl2IkZl8%3D&reserved=0>

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=5N2k3YHA9JKDUigFpSXo00kTXFtWarT0QpDZnTfEz1g%3D&reserved=0>
 can be used for graphics (in well-used formats), large files, etc.

Website: 
http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=vUyRsSbcrPO6n2uh1UcgRY08oOq9POOvCt0dKXKR1Jw%3D&reserved=0>
Instructions: http://www.ieee-pses.org/list.html (including how to 
unsubscribe)<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=8J5QV78%2Fwq4krsnRqpX4O9x0vy3%2BK00g5%2BLLSHkdsNo%3D&reserved=0>
List rules: 
http://www.ieee-pses.org/listrules.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=eTvHe6APW9fMpDApBVZUO%2FgfW%2BUrLvbGfS2Ke4tgVR0%3D&reserved=0>

For help, send mail to the list administrators:
Scott Douglas &LT;sdoug...@ieee.org<mailto:sdoug...@ieee.org>&GT;
Mike Cantwell &LT;mcantw...@ieee.org<mailto:mcantw...@ieee.org>&GT;

For policy questions, send mail to:
Jim Bacher &LT;j.bac...@ieee.org<mailto:j.bac...@ieee.org>&GT;
David Heald &LT;dhe...@gmail.com<mailto:dhe...@gmail.com>&GT;



--

Douglas E Powell

doug...@gmail.com<mailto:doug...@gmail.com>
http://www.linkedin.com/in/dougp01<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.linkedin.com%2Fin%2Fdougp01&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=vn1P3EWw0nPCZzUUxsE9Og0x8kOGvch0I57KKloujF4%3D&reserved=0>
-
----------------------------------------------------------------

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<mailto:emc-p...@ieee.org>>

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=VERtLqFaa2Wa6b8bVDBV7WNBuVFMXEYO80qIl2IkZl8%3D&reserved=0>

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=5N2k3YHA9JKDUigFpSXo00kTXFtWarT0QpDZnTfEz1g%3D&reserved=0>
 can be used for graphics (in well-used formats), large files, etc.

Website: 
http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=vUyRsSbcrPO6n2uh1UcgRY08oOq9POOvCt0dKXKR1Jw%3D&reserved=0>
Instructions: http://www.ieee-pses.org/list.html (including how to 
unsubscribe)<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=8J5QV78%2Fwq4krsnRqpX4O9x0vy3%2BK00g5%2BLLSHkdsNo%3D&reserved=0>
List rules: 
http://www.ieee-pses.org/listrules.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=02%7C01%7Cted.eckert%40microsoft.com%7Cf6de49b47fd04649e85608d53ce008dc%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481855278544230&sdata=eTvHe6APW9fMpDApBVZUO%2FgfW%2BUrLvbGfS2Ke4tgVR0%3D&reserved=0>

For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>>
Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>>

For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>>
David Heald <dhe...@gmail.com<mailto: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<mailto:emc-p...@ieee.org>>

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=Fp7dGXSs866%2Fg7d7twF3a5w1aLinS4Vj4OXPIyr3%2FjU%3D&reserved=0>

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=Dy0WAgqhSmvxjB6%2BhZjyLR0Z1iCJtQlU1AFSDkUmv9Y%3D&reserved=0>
 can be used for graphics (in well-used formats), large files, etc.

Website: 
http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=zHRGrvsRdqlOmdnu5WM2d1%2F7qQysx4xmQahInpMGbBA%3D&reserved=0>
Instructions: http://www.ieee-pses.org/list.html (including how to 
unsubscribe)<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=2pKEY1uk7I7FjFASXvzppEErleTMlSCP4p6zj%2BDLmH4%3D&reserved=0>
List rules: 
http://www.ieee-pses.org/listrules.html<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=02%7C01%7CTed.Eckert%40MICROSOFT.COM%7Cce8e095f37214927e60c08d53ceba4e8%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636481905162828554&sdata=7hTVg%2Fuq6XJpDYoauNV282%2FVIgBKd73S8MB2QHlPx4g%3D&reserved=0>

For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>>
Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>>

For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>>
David Heald <dhe...@gmail.com<mailto: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>

Reply via email to