If the 24V AC is generated via a Class II Direct Plug-In power pack, wouldn't the test be run 'through' the power pack - the power pack plugged into the outlet on the surge tester? The power pack runs off of AC Mains. For argument sake, what's the difference of that scenario as compared to having to test a product which is configured with an IEC 320 power entry module through which a 24V AC transformer inside the product receives it's AC Mains? The functional circuit operates off of 24V AC, but the primary power is AC Mains - whether it's supplied through a line cord/power entry module combo or a direct plug-in transformer.
My opinion only . . . John Juhasz Fiber Options Bohemia, NY -----Original Message----- From: Mavis, Robert [mailto:rma...@pelco.com] Sent: Friday, December 21, 2001 1:46 PM To: Jennifer Banh; emc-p...@majordomo.ieee.org Subject: RE: surges on 24VAC The AC Mains test is just that AC Mains. The Definition of AC mains is basically what comes out of the wall. Since the product is 24VAC it falls under low voltage/signal lines. Test is as a signal line. -----Original Message----- From: Jennifer Banh [mailto:jb...@bb-elec.com] Sent: Monday, December 17, 2001 11:44 AM To: emc-p...@majordomo.ieee.org Subject: surges on 24VAC Hello everyone, I am currently trying to test a product of ours that falls under 50082-1 generic standard for light industrial equipment. Our problem is that we have a 24VAC power input port. The generic standard calls out for EN 61000-4-5 on AC power input ports. After looking at EN 61000-4-5 it seems that it is intended for AC mains voltages, but I couldn't find anything that says a 24VAC input is exempt from this test. I am looking for outside opinions on whether this test is truly applicable. Thanks, Jennifer Banh BTW, we already tried just testing to the spec, and failed. Any suggestions on how to protect against this test would also be appreciated. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
