Dear Bob,
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?
Sincerely
K.Balasubramanian
Project Leader - Hardware.
[email protected]
Sent by:
[email protected] To
[email protected]
cc
04/10/2006 02:22
PM Subject
Fw: FCC equipment authorization:
Have RFID devices operating @ 13.56
MHz been exempted from conducted
emission testing?
They must be talking about the reader. It would not be subjected to line
conducted tests because it is running off a 12 volt DC supply (just like
any other PC board, etc.). The physical access control panel would be
subjected to line conducted emission tests. Whether a device is battery
backed up or not has no significance on whether it is subjected to line
conducted tests.
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=========================
----- Forwarded by Robert E. Heller/US-Corporate/3M/US on 04/10/2006 03:46
AM -----
Kbalasubramanian@
scmmicro.co.in
Sent by: To
[email protected] [email protected]
cc
04/10/2006 01:50 Subject
AM FCC equipment authorisation: Have
RFID devices operating @ 13.56 MHz
been exempted from conducted
emission testing?
Dear Experts,
Recently I have down loaded a test report of an intentional radiator
type RFID device from the FCC website. In the report it is mentioned that
line conducted emission test is not applicable due to product type. This is
a physical access control reader device operating at 13.56 MHz drawing 12
volts D.C. power from a physical access control panel. The control panel
is drawing power from the mains and have a battery back up too.
Are devices with battery back up exempted from line conducted
emission?
Sincerely
K.Balasubramanian
Project Leader - Hardware.
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