It is always a good idea to have a copy of the standard.

If it is DC/DC converter, you might find some of the footnotes in
the generic immunity standards such as EN 61000-6-2 useful.

Example [paraphrased]:

Apparatus with a d.c. power input port intended for use with an
ac-dc power adaptor shall be tested on the ac power input of
the power adaptor specified by the manufacturer, or where none
is so specified, using a typical ac-dc power adaptor. The surge test
is not applicable to dc power input ports intended to be permanently
connected to cables less than 10m

There are other notes addressing testing of signal lines.

Regards

- Chris Chileshe
(own views etc etc)



From:   drcuthbert [SMTP:drcuthb...@micron.com]
Sent:   Thursday, March 20, 2003 5:15 PM
To:     'jrbar...@iglou.com'; drcuthbert; emc-p...@majordomo.ieee.org
Subject:        RE: surge Z?


Thanks to everyone for the numbers. To clarify, the device is a DC/DC 
converter. We will be applying the surge to the DC input and to the DC 
output. I have ordered EN 61000-4-5 to get the details.

   Dave


From: John Barnes [mailto:jrbar...@iglou.com]
Sent: Thursday, March 20, 2003 9:45 AM
To: drcuthbert; emc-p...@majordomo.ieee.org
Subject: Re: surge Z?


Dave,
Section 6.1 of EN 61000-4-5:1995 says "the generator has an effective
output impedance of 2 ohms".

                John Barnes KS4GL, PE, NCE, ESDC Eng., SM IEEE
                dBi Corporation
                http://www.dbicorporation.com/


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