Same as always; where does the current go, and what does it do when it gets there? Of course, for ESD, it could be radiated, but the question is the same. If one can't keep it out, he must find and harden vulnerable devices/circuitry.
I've had some luck injecting short (and much lower energy) pulses directly to identify what needs to be done. And also looking hard at the schematics and layout. It's amazing the errors that can creep in. But for what it is worth, many I/O ports can tolerate a few bypass capacitors or clamping diodes. Good luck! Cortland KA5S > [Original Message] > From: Amund Westin <[email protected]> > To: <[email protected]> > Date: 5/25/2010 9:15:29 PM > Subject: ESD - some basic hints pls > > I have a 24VDC operated ITE / radio unit. > It fails on 6kV (contact discharge) applied to RX port. Microprocessor > restarts. > Any basic advice how to protect the unit? I have no ground in my system. > > Best regards > Amund - 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.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
