Charlie - The immunity document for security systems, EN 50130-4, specifies a CDN for screened cable; we use the Fischer CDN on video cable. EN 55024 (ITE) does not specify a test procedure for screened cable. Our comparative results on the same 75-ohm cable link indicate that the CDN-75 provides a much more severe stress than the (Fischer) E-M clamp.
Outlook: Products that 'pass' using the E-M clamp on sccreened cables are very likely to fail if retested, i.e. by an agency or an OEM customer. E-M results on video products are likely to give one a false sense of security; image degradation will be more severe with the CDN. _ Honeywell David W. Sterner Quality Assurance Engineering 2 Corporate Center Drive Suite 100 P.O. Box 9040 Melville, NY 11747 Phone: (516) 577-2321 Fax: (516) 577-3540 david.ster...@honeywell.com <http://www.honeywell.com> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Charles Blackham Sent: Wednesday, January 07, 2009 1:49 AM To: emc-p...@ieee.org Subject: EN61000-4-6: coupling to shielded cable Group We have a unit with a 2-wire shielded signal cable that falls under EN61326-2-3 and also requirements of NAMUR (automation technology in process industries). We have been performing EN61000-4-6 Conducted Immunity tests on the shielded cable using a coupling clamp as the injection method, however client is requesting we use a CDN Does anyone perform such testing using a CDN? regards Charlie - 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...@ptcnh.net> 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...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
