Bently Nevada Card dropping out causing the 4 radial vibration probes on turbine to go into “Not OK”

Hi any help on this would be awesome!

Bently Nevada Card 3 is dropping out causing the 4 radial probes on the gas turbine generator to go into “Not OK” state which the PLC then see’s and issues first out 108117 – “Not safe to run to turbine with no vibration protection”
“Not Ok” clears within 30S (BN Timed OK Defeat) and unit can be put into a spin and restarted

what we have done so far:
  • Trip 1 – No change, reset restart
  • Trip 2 – Reseat Slot 3 card
  • Trip 3 – Replace Slot 3 blue card
  • Trip 4 – Replace Slot 3 IO card below
  • Trip 5 – Replace full backplane and a number of IS barriers
  • Trip 6 – Replacing a common cable from the BN rack to the isolators, replaced pepper fuchs power supply on the rail powering the isolators. Checked inside JB 6 and the junction boxes at the GG and looked fine.

Nuisance trips are still persisting :'(
 
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