I am looking for guidance on the failure criterion for the Automotive directive 2004/104/EC. We have a small device that falls under the immunity related functions description in the directive. The issue is the vehicular transients described in ISO 7637-2. The requirements of the directive are functional status B or C for devices with immunity related functions. I don’t see how we can meet these. Per 7637-2, functional status C means the device automatically returns to normal operation when the interference is removed. For test pulses 1(with a 200 ms dropout) and 2b(end at 0 VDC) that is just not possible for us.
How many devices are able to recover from a 200ms power drop? Even if we could, we would not return to normal operation, because automatically restarting is a safety issue. So I am looking for input as to how anyone can meet these requirements. Thanks David T - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
