[foxboro] Short FBI Experience

Hi All,
 
We have a system with several of the old "Short" style Field Bus
Isolators (PN P0400VE-0F).  So far we have had good luck with these 1992
era FBIs, but we have had one fail recently.  What I'm fishing for here
is any experience with these old style FBIs, either good or bad, so we
can determine if we need to look at replacing these any time soon.  I
can't help the sneaking suspicion that there is something wrong with
these old short FBIs that caused the change to the new style long FBI.
I found a CAR #1000440 that suggests there were a few power problems
with some of the old FBIs.
 
Any information, insight, rumors, or outright speculation would be
appreciated.
 
Thanks,
Gaylon Hicks
TVA - Browns Ferry NP
 
 
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