I'm looking for some advice on changing a component within an Exd enclosure and I'm not sure if this change would mean the box needing to be recertified by the manufacturer. We want to change out a Pepperl & Fuchs barrier and replace this with a Pepperl & Fuchs trip amplifier. The power consumption of the identically sized unit would increase by aroun 1 watt. I seem to recall that no changes are permitted. Can anyone advise?
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