I worked for biggest flash based USB drive and SD, CF micro SD cards
manufacturer for long time.
Safety is very complicated. But simply said as the device operates less than
the lower limit specified in LVD, it is not required, However GPSD may ask
you for the report etc.
on EMC front, it is required and such devices radiate. It is quite a
challenge to isolate the emissions whether it is from USB drive or host
computer or it 's this combination.
It is also very interesting to study ESD immunity and pass/fail acceptance
criteria.
If you need further assistance Please reply me on this e-mail.
saloni95...@yahoo.com.
Thanks,
Sudhakar
--- On Tue, 8/18/09, Douglas Smith <d...@emcesd.com> wrote:
From: Douglas Smith <d...@emcesd.com>
Subject: Re: Approvals Required for USB Flash Drive or "Thumb Drive"
To: "Monrad Monsen" <monrad.mon...@sun.com>
Cc: emc-p...@ieee.org
Date: Tuesday, August 18, 2009, 7:36 PM
Hi Monrad and the group (from Austin, TX)
I have seen a USB flash drive radiate at several hundreds of MHz due to
a
resonance in its physical structure and helped the client fix the problem. So
I think the "company" you mention is not being diligent.
Duog
Monrad Monsen wrote:
What EMC and safety approvals are required for USB flash drives
or "thumb
drives"?
We are preparing to source for re-sell some USB flash drives
from another
company that tells us that they are exempt. They have a Declaration of
Conformity (DOC), but no supporting test reports. This seems flaky to me on
many levels.
Looking at the "USB flash drive" article in Wikipedia, the
devices would
have a 12 MHz clock oscillator, so I can't merely say it is passive memory.
However, could the USB flash drive still be excluded from the scope of the
European Union EMC Directive 2004/108/EC as inherently benign equipment? See
section 1.1.4 within the "Guide for the EMC Directive 2004/108/EC".
(http://ec.europa.eu/enterprise/electr_
quipment/emc/guides/emcguide_may2007.pdf) I would want the device tested for
radiated emissions, as well as the EN55024 enclosure port immunity tests like
RF radiated field immunity, ESD, and power frequency magnetic field immunity.
I see that the LVD Directive 2006/95/EC limits its cope to
equipment
operating in the range of 50-1000VAC and a range of 75-1500VDC. (Article 1 of
LVD Directive 2006/95/EC) However, "electrical components which are intended
to be incorporated into other equipment and for which a risk assessment can be
undertaken, such as transformers and electrical motors, are covered as such by
the Directive and must be CE marked." (Section 9, "Guidelines on the
Application of Directive 2006/95/EC") I would assume that this standard USB
flash drive would fit this description.
Please confirm what worldwide EMC and safety approvals and
testing is
required. I definitely plan to required some systems level EMC testing that
includes the USB Flash Drive mounted on a server or PC, but I need to confirm
what agency approvals are needed for the Flash Drive to be able to sell
worldwide including the frequently regulated countries like USA, Canada,
Europe (plus Turkey), Australia, Japan (VCCI), Taiwan, China, Russia,
Argentina and Mexico.
Thanks.
--
Monrad L. Monsen
Worldwide Compliance Officer
Sun Microsystems
monrad.mon...@sun.com
303.272.9612 Office
-
----------------------------------------------------------------
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.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be
posted to that
URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
--
--------------------------------------------------------------
___ _ Doug Smith
\ / ) P.O. Box 1457
========= Los Gatos, CA 95031-1457
_ / \ / \ _ TEL/FAX: 408-356-4186/358-3799
/ /\ \ ] / /\ \ Mobile: 408-858-4528
| q-----( ) | o | Email: d...@dsmith.org
\ _ / ] \ _ / Web: http://www.dsmith.org
--------------------------------------------------------------
-
----------------------------------------------------------------
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.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
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.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
