There is a whole "hygiene" relative to grounding and ESD protection. Is it in a metal box? Is the metal box grounded? Are all of your power supplies grounded? Did you actually measure it? (Most U.S. wall warts don't connect to safety ground, so the whole system is floating, and anything can happen.) Are there ground referenced ESD clamps on all I/O leaving the metal box? Is the bench or table it is sitting on grounded? ESD mat?
Without good grounding and protection "hygiene" all external wires, including the Ethernet cables, the external wires all act as antennas to pick up external noise and signals, including induced voltages from lightning. A wall-wart without a safety-ground pin connection is the worst thing you can run something from, from the aspect of ESD protection. --- Graham == On Tuesday, June 28, 2016 at 7:22:42 PM UTC-5, Gerald wrote: > > Well, I don't know where to start. A detailed diagram of the entire system > hookup would help. > > Gerald > > > On Tue, Jun 28, 2016 at 7:11 PM, Wally Bkg <[email protected] > <javascript:>> wrote: > >> It happened again, my Beaglebone White crashed as a thunderstorm moved >> through the area. It is on a UPS, the same UPS as my router ASUS RT-AC56 >> and Raspberry Pi2, neither of which glitched in any way. >> >> It does have a lot of interface wiring hooked up but these are very >> thoroughly EMP protected with Transorbs and have been in use for 20+ years >> surviving tropical storm Allison, Hurricane Ike, and many other national >> news worth storms in the Houston area -- this was a pitiful storm by our >> standards never even making the lights noticeably flicker, although the >> UPSes did "beep" once. This protection was added in a rebuild after EMP >> from Hurricane Alicia wiped out the initial system (pre-IBMPC CMOS logic). >> >> Why is the BBW far more sensitive to this than the RPi2 using similar 2A+ >> wall-wart power supplies plugged into the same UPS? >> >> My initial "work-around" would be a watchdog running on the RPi2 to >> active a normally closed relay to interrupt the BBW power supply so it'd >> restart after after the BBW dies. I've already have in place network >> monitoring of the BBW status and a "heartbeat" to detect when it stops. >> But I'd rather the BBW didn't crash :( >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/9305eb4a-be7e-4c4e-8985-404dc92fcc12%40googlegroups.com >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Gerald > > [email protected] <javascript:> > http://beagleboard.org/ > [email protected] <javascript:> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/cae943c7-6211-4796-9037-f37dcbe56cf8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
