15.107 (d) and 15.207 (c) are talking about AC line power and these
sections were clarified in the 2004 edition and it fully reads:
"Measurements to demonstrate compliance with the conducted limits are not
required for devices which only employ battery power for operation and
which do not operate from the AC power lines or contain provisions for
operation while connected to the AC power lines. Devices that include, or
make provisions for, the use of battery chargers, AC adaptors or battery
eliminators or that connect to the AC power lines indirectly, obtaining
their power through another device which is connected to the AC power
lines, shall be tested to demonstrate compliance with the conducted
limits."
According to the FCC, the AC line conducted emission test is necessary for
equipment that obtain their AC power through another piece of equipment.
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=========================
Kbalasubramanian@
scmmicro.co.in
Sent by: To
[email protected] John Woodgate
<[email protected]>
cc
04/10/2006 05:48 [email protected]
AM Subject
Re: Fw: FCC equipment
authorization: Have RFID devices
operating @ 13.56 MHz been exempted
from conducted emission testing?
Dear John,
Thanks for your expert opinion and guidance. After posting my
previous message I browsed through FCC Part 15 and found the below.
As per section 15.107 (d) and section 15.207 (c), "devices obtaining their
power through another device which is connected to the AC power lines,
shall be tested to demonstrate compliance with the conducted limits".
If my understanding is correct the physical access control reader
which draws power from the physical access control panel also should prove
compliance to conducted emissions tests. But the report listed in the FCC
website which I hope would have been reviewed by a TCB indicates the
otherway.......................
Sincerely
K.Balasubramanian
Project Leader - Hardware.
John Woodgate
<[email protected]
o.uk> To
Sent by: [email protected]
[email protected] cc
Subject
04/10/2006 03:35 Re: Fw: FCC equipment
PM authorization: Have RFID devices
operating @ 13.56 MHz been exempted
from conducted emission testing?
In message
<ofc16ca941.1e2334c5-on6525714c.003142c5-6525714c.00322...@scmmicro.co.in
>, dated Mon, 10 Apr 2006, [email protected] writes
>Thanks for the reply. So if a device is not drawing power from the a.c.
>mains it is exempted from line conducted emissions test.
> Similarly USB devices (such as USB mouse, USB keyboard, USB smart
>card reader etc.) which are drawing power from the USB port of the PC
>also are exempted from the line conducted emissions testing.
> Is my understanding correct?
It may be correct for FCC: the requirements in Europe are rather
different, and too complicated to explain here. See clause 9 of ***the
latest edition of*** EN 55022.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. Website: http://www.ieee-pses.org/
To post a message to the list, send your e-mail to [email protected]
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 [email protected]
Mike Cantwell [email protected]
For policy questions, send mail to:
Jim Bacher: [email protected]
David Heald: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. Website: http://www.ieee-pses.org/
To post a message to the list, send your e-mail to [email protected]
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 [email protected]
Mike Cantwell [email protected]
For policy questions, send mail to:
Jim Bacher: [email protected]
David Heald: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. Website: http://www.ieee-pses.org/
To post a message to the list, send your e-mail to [email protected]
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 [email protected]
Mike Cantwell [email protected]
For policy questions, send mail to:
Jim Bacher: [email protected]
David Heald: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
