I read in !emc-pstc that Gregg Kervill <gr...@test4safety.com> wrote (in
<004801c1955f$fe610f10$7e00a8c0@MENHADEN>) about 'EMC-related safety
issues', on Fri, 4 Jan 2002:
>    The semiconductor may switch the relay due to external EMC - but it is 
> more 
>    likely that the semiconductor or the relay will fail and produce an 
> 'unsafe' 
>    output.

What disturbance levels do you have in mind? Nearby lightning? I don't
see what else will pop a transistor, still less a relay.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
After swimming across the Hellespont, I felt like a Hero. 

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