Some good suggestions. Can you use shielded cable and terminate the shield well on both ends?
I don't know what your devices are or what the interface is or what it does but generally this test has a pass/fail criteria B, so if it can return the I/O to normal operation after the test then that would be a pass. Can your software recover operation to the I/O after the test? 90% of the failures we see are corrected by using shielded cable and/or improving the grounding between the EUT and AE. We would generally plan to use shielded cable on any communication I/O regardless of the speed unless it is designed to be extremely rf immune without shielding such as Ethernet. The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of ce-test, qualified testing bv - Gert Gremmen Sent: Wednesday, November 21, 2012 9:47 AM To: Amund Westin; [email protected] Subject: RE: Fast transients - burst - suppression components Small series R or alternate L (or CM-coil) and a suitable C to GND High off filter configured at 5 MHz approx. Not too low F (read: high inductance) as interwinding capacitance will spoil the effect. The essential factor here is if the ground plane is continuous, contains no slots (if PCB) If not, it won't work unless the CM coil is BBIIGG. If you cannot fix the PCB make a groundplane, or use metal enclosure. Regards, Ing. Gert Gremmen, BSc [email protected]<mailto:[email protected]> www.cetest.nl Kiotoweg 363 3047 BG Rotterdam T 31(0)104152426 F 31(0)104154953 Before printing, think about the environment. Van: [email protected]<mailto:[email protected]> [mailto:[email protected]] Namens Amund Westin Verzonden: Wednesday, November 21, 2012 1:41 PM Aan: [email protected]<mailto:[email protected]> Onderwerp: Fast transients - burst - suppression components When doing ±1kV burst (via capacitive coupling clamp) onto an unshielded signal cable, the EUT gets problems (fail operation). The communication signals on the cable are rather slow, below 1MHz. We are planning to make a burst filter and we have ground / chassis pins close by. Any recommendations for good burst suppression components? B.r. Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
