Re: [PSES] Correct interpretation of EN 60950-1 or EN 62368-1

2020-11-24 Thread Douglas Powell 
It seems interesting to me that the IEC TR 62368-2 would have two bits of
text I actually don't mind seeing, but try to avoid nonetheless;
Daisy-Chain and Master-Slave. It turns out that from an electrical
engineering perspective, Daisy Chain translates well into
other languages and is understandable. However, I had thought that years
ago the master-slave term had been more or less banned by the
politically correct crowd

.

Best, -Doug

Douglas E Powell
Laporte, Colorado USA
doug...@gmail.com
http://www.linkedin.com/in/dougp01




On Tue, Nov 24, 2020 at 7:02 AM Charlie Blackham <
char...@sulisconsultants.com> wrote:

> Scott
>
>
>
> Quote from PD IEC/TR 62368-2:2015, “*Audio/video, information and
> communication technology equipment Part 2: Explanatory information related
> to*
>
> *IEC 62368-1*”
>
>
>
> *Annex F Equipment markings, instructions, and instructional safeguards*
>
> *F.3 Equipment markings*
>
> Source: EC Directives such as 98/37/EC Machinery Directive, Annex I clause
> 1.7.3 marking; NFPA79:2002, clause 17.4 nameplate data; CSA C22.1 Canadian
> Electric Code, clause 2-100 marking of equipment give organized
> requirements. The requirements here are principally taken from IEC 60065 and
>
> IEC 60950 series.
>
>
>
> *F.3.3.2 Equipment without direct connection to mains*
>
> Source: IEC 60950-1
>
> Purpose: To clarify that equipment powered by mains circuits, but not
> directly connected to the mains using standard plugs and connectors, need
> not have an electrical rating.
>
> Rationale: Only equipment that is directly connected to the mains supplied
> from the building installation needs to have an electrical rating that
> takes into account the full load that may be connected to the building
> supply outlet. For equipment that is daisy-chained or involves a
> master-slave configuration, only the master unit or the first unit in the
> daisy chain needs to be marked
>
>
>
>
>
> Best regards
>
> Charlie
>
>
>
> *Charlie Blackham*
>
> *Sulis Consultants Ltd*
>
> *Tel: +44 (0)7946 624317*
>
> *Web: https://sulisconsultants.com/  *
>
> Registered in England and Wales, number 05466247
>
>
>
> *From:* Scott Xe 
> *Sent:* 24 November 2020 13:46
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [PSES] Correct interpretation of EN 60950-1 or EN 62368-1
>
>
>
> Power rating under cl 1.7.1 of EN 60950-1 or cl F3.3 of EN 62368-1 states
> that "If a unit is not provided with a means for direct connection to a
> mains supply, it need not be marked with any electrical rating, such as its
> rated voltage, rated current or rated power."  In general, "input: 5 Vdc X
> A" is marked on the device.  We have a new USB device that does not have
> any rated marking on it and it comes with a conformity test report meeting
> EN 62368-1.  Doesn't a low voltage device have no potential safety issues?
> Can someone share any light of this interpretation or background.
>
>
>
> Thanks and regards,
>
>
>
> Scott
>
> -
> 
>
> 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 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher 
> David Heald 
> -
> 
>
> 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 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher 
> David Heald 
>


-- 

Douglas E Powell

doug...@gmail.com

Re: [PSES] Correct interpretation of EN 60950-1 or EN 62368-1

2020-11-24 Thread Scott Xe 
Dear Charlie,

Thanks for your reference and advice!  Obviously I did not notice this rule
existing for long.  Looking at USB external hard drives, printers, mobile
phones, card readers, scanners, etc. all do not have any power ratings.

Best regards,

Scott


On Tue, 24 Nov 2020 at 22:02, Charlie Blackham 
wrote:

> Scott
>
>
>
> Quote from PD IEC/TR 62368-2:2015, “*Audio/video, information and
> communication technology equipment Part 2: Explanatory information related
> to*
>
> *IEC 62368-1*”
>
>
>
> *Annex F Equipment markings, instructions, and instructional safeguards*
>
> *F.3 Equipment markings*
>
> Source: EC Directives such as 98/37/EC Machinery Directive, Annex I clause
> 1.7.3 marking; NFPA79:2002, clause 17.4 nameplate data; CSA C22.1 Canadian
> Electric Code, clause 2-100 marking of equipment give organized
> requirements. The requirements here are principally taken from IEC 60065 and
>
> IEC 60950 series.
>
>
>
> *F.3.3.2 Equipment without direct connection to mains*
>
> Source: IEC 60950-1
>
> Purpose: To clarify that equipment powered by mains circuits, but not
> directly connected to the mains using standard plugs and connectors, need
> not have an electrical rating.
>
> Rationale: Only equipment that is directly connected to the mains supplied
> from the building installation needs to have an electrical rating that
> takes into account the full load that may be connected to the building
> supply outlet. For equipment that is daisy-chained or involves a
> master-slave configuration, only the master unit or the first unit in the
> daisy chain needs to be marked
>
>
>
>
>
> Best regards
>
> Charlie
>
>
>
> *Charlie Blackham*
>
> *Sulis Consultants Ltd*
>
> *Tel: +44 (0)7946 624317*
>
> *Web: https://sulisconsultants.com/  *
>
> Registered in England and Wales, number 05466247
>
>
>
> *From:* Scott Xe 
> *Sent:* 24 November 2020 13:46
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [PSES] Correct interpretation of EN 60950-1 or EN 62368-1
>
>
>
> Power rating under cl 1.7.1 of EN 60950-1 or cl F3.3 of EN 62368-1 states
> that "If a unit is not provided with a means for direct connection to a
> mains supply, it need not be marked with any electrical rating, such as its
> rated voltage, rated current or rated power."  In general, "input: 5 Vdc X
> A" is marked on the device.  We have a new USB device that does not have
> any rated marking on it and it comes with a conformity test report meeting
> EN 62368-1.  Doesn't a low voltage device have no potential safety issues?
> Can someone share any light of this interpretation or background.
>
>
>
> Thanks and regards,
>
>
>
> Scott
>
> -
> 
>
> 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 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher 
> David Heald 
>

-

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discussion list. To post a message to the list, send your e-mail to 


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Attachments are not permitted but the IEEE PSES Online Communities site at 
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formats), large files, etc.

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List rules: http://www.ieee-pses.org/listrules.html

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Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald:

Re: [PSES] Correct interpretation of EN 60950-1 or EN 62368-1

2020-11-24 Thread Charlie Blackham 
Scott

Quote from PD IEC/TR 62368-2:2015, “Audio/video, information and communication 
technology equipment Part 2: Explanatory information related to
IEC 62368-1”

Annex F Equipment markings, instructions, and instructional safeguards
F.3 Equipment markings
Source: EC Directives such as 98/37/EC Machinery Directive, Annex I clause 
1.7.3 marking; NFPA79:2002, clause 17.4 nameplate data; CSA C22.1 Canadian 
Electric Code, clause 2-100 marking of equipment give organized requirements. 
The requirements here are principally taken from IEC 60065 and
IEC 60950 series.

F.3.3.2 Equipment without direct connection to mains
Source: IEC 60950-1
Purpose: To clarify that equipment powered by mains circuits, but not directly 
connected to the mains using standard plugs and connectors, need not have an 
electrical rating.
Rationale: Only equipment that is directly connected to the mains supplied from 
the building installation needs to have an electrical rating that takes into 
account the full load that may be connected to the building supply outlet. For 
equipment that is daisy-chained or involves a master-slave configuration, only 
the master unit or the first unit in the daisy chain needs to be marked


Best regards
Charlie

Charlie Blackham
Sulis Consultants Ltd
Tel: +44 (0)7946 624317
Web: https://sulisconsultants.com/
Registered in England and Wales, number 05466247

From: Scott Xe 
Sent: 24 November 2020 13:46
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Correct interpretation of EN 60950-1 or EN 62368-1

Power rating under cl 1.7.1 of EN 60950-1 or cl F3.3 of EN 62368-1 states that 
"If a unit is not provided with a means for direct connection to a mains 
supply, it need not be marked with any electrical rating, such as its rated 
voltage, rated current or rated power."  In general, "input: 5 Vdc X A" is 
marked on the device.  We have a new USB device that does not have any rated 
marking on it and it comes with a conformity test report meeting EN 62368-1.  
Doesn't a low voltage device have no potential safety issues?  Can someone 
share any light of this interpretation or background.

Thanks and regards,

Scott
-


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

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-

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 


All emc-pstc postings are archived and searchable on the web at:
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http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

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[PSES] Correct interpretation of EN 60950-1 or EN 62368-1

2020-11-24 Thread Scott Xe 
Power rating under cl 1.7.1 of EN 60950-1 or cl F3.3 of EN 62368-1 states
that "If a unit is not provided with a means for direct connection to a
mains supply, it need not be marked with any electrical rating, such as its
rated voltage, rated current or rated power."  In general, "input: 5 Vdc X
A" is marked on the device.  We have a new USB device that does not have
any rated marking on it and it comes with a conformity test report meeting
EN 62368-1.  Doesn't a low voltage device have no potential safety issues?
Can someone share any light of this interpretation or background.

Thanks and regards,

Scott

-

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 


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:
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Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: