3. Case studies

3.1 Case presentation

This example is inspired by the one presented in to illustrate the application of the PDS method. The system under consideration is a HIPPS (High Integrity Pressure Protection System) designed to protect equipment from pressure surges. The system consists of :

• three pressure transmitters (PT1, PT2 and PT3) with 2oo3 redundancy;

• a safety PLC with redundant input, CPU and output boards;

• two isolation valves...