Enhance Plant Safety with ABB XV C768 AFC116 TMR Controller Board

In a coastal natural gas liquefaction (LNG) facility, protecting against overpressure in cryogenic heat exchangers is absolutely critical. A failure could lead to catastrophic loss of containment. The facility’s Safety Instrumented System (SIS) is built around a Triconex controller whose heart is the ABB XV C768 AFC116​ main processor board. It continuously monitors pressure transmitters and executes complex safety logic. In a real incident where two transmitters indicated a dangerous pressure rise while the third failed, the TMR architecture of the XV C768 AFC116​ performed 2oo3 voting, correctly identifying a genuine demand. It initiated a safe shutdown sequence, isolating the section. The system’s high availability, ensured by the XV C768 AFC116, allowed the failed transmitter channel to be repaired online without taking the safety system offline, maintaining continuous protection.