Hello,
I have a question about grounding according to code you are suppose to ground non-current carrying parts but we have some remote flow meters out in the field and we tie our grounds for the 110 vac to the ground bar which is tied to the ground grid but it seems we are popping electronics left an right so should we pull the ground of the backplate.

 

Steve,

It sounds like your electronics are being smoked by large potential difference between the field and the supply/input module, e.g. lightning. I would ground back to the supply as per code, but also provide a good solid ground strap from transmitter to the process line and perhaps some lightning protection and a signal isolator at the receiver. You might even consider a wireless link.

Which end are you having the problem, at the transmitter or receiver?

Roy