Figure 3: Redundant system with Safe ESD for Safe OPENING
4.5. Examples of applications
Safe OPENING of a pressure vessel using the Safe ESD function
The standard PLC controls the entire system. A system fault occurs if excessive
pressure is generated within the system. In this case, the safety PLC immediately
opens the valve for safe pressure relief.
Figure 4: Application example: Pressure vessel
13
Multi-turn actuators
SA 07.2 – SA 16.2/SAR 07.2 – SAR 16.2 Safety instrumented systems and safety functions
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