• Why is isolation required in fieldbus power conditioners ?

Why is isolation required in fieldbus power conditioners

Maintaining isolation between the Fieldbus pair and plant ground is critical to the reliability of FOUNDATION fieldbus™ systems.

Isolation has been a requirement of FOUNDATION fieldbus™ since its inception. It was written into the ISA S50.02 standard and later adopted into the IEC 61158-2 standard. The primary reason for this was to reduce the chance of an outside electrical interference affecting the FOUNDATION fieldbus™ signals.

As we have gained field experience, it has become apparent that there are other issues that can adversely affect a FOUNDATION fieldbus™ system when isolation is lost.