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Erik Malund
11/08/06 06:36
Read: 702 times
Mt Airy, Nc
USA


 
#127558 - so doesa EMI
Responding to: Ap Charles's previous message
But Celestial Lightning isnt noise it gives huge voltage impulses
Why do you think that the "EMI resistant" (not "lightning resistant") devices are rated at 15kV. If you get a direct hit from a lightning, NOTHING will save your box, with proper design (actual 'to the outside' drivers with 15kV rating for everyything that leaves the box, ferrites and capacitors all over etc) you can survive most any indirect hit.

If you have any plans of having a CMOS pin or similar leaving the box you are screwed (and so will many that never see lightning be).

So, read the noise recommendations and expand on them.

A few details of what you are making might lead to better suggestions.

Erik

List of 20 messages in thread
TopicAuthorDate
Lightning protection      Ap Charles      11/08/06 06:17      
   there is much to this      Erik Malund      11/08/06 06:19      
      Lightning protection      Ap Charles      11/08/06 06:24      
         so doesa EMI      Erik Malund      11/08/06 06:36      
            Mr. Faraday knew how...      Kai Klaas      11/08/06 08:13      
               THICK metal      Steve M. Taylor      11/08/06 09:45      
            Direct Hits      Russell Bull      11/08/06 17:06      
               Keep it out of the encosure!      Kai Klaas      11/08/06 20:08      
                  My pplication      Ap Charles      11/08/06 23:52      
                     Details?      Kai Klaas      11/11/06 08:33      
               I disagree      Erik Malund      11/09/06 06:07      
                  No, no...      Kai Klaas      11/09/06 20:32      
                     Disconnecting the shield at one end of the cables      Ap Charles      11/09/06 23:44      
                        a) and b)      Erik Malund      11/10/06 06:05      
                           Yes, crossed opinions...      Kai Klaas      11/10/06 09:18      
                              and the twain shall never meet      Erik Malund      11/10/06 10:52      
                        the Shield      Andy Peters      11/10/06 14:55      
                           The RS485 signal lines is galvanically...........      Ap Charles      11/10/06 23:01      
                              GND of RS485 bus, PROFIBUS      Kai Klaas      11/11/06 08:27      
   If you get this close        Jez Smith      11/09/06 01:28      

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