Are separate sets of SIS systems required for devices of the same type to be kept apart?
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Are separate sets of SIS systems required for devices of the same type to be kept apart?
The design of a SIS (Safety Instrumented System) depends on the safety requirements of the corresponding equipment. In some cases, using multiple independent SIS systems can improve the safety and reliability of the system ； In other cases, it may be chosen to integrate all security functions into a single system. There is no uniform rule regarding whether multiple SIS systems need to be separated. It entirely depends on the designer’s understanding of the system and their assessment of security requirements, as well as considerations such as the operating environment of the specific device, security needs, and **or regional regulations. It is recommended to consult the specific specifications or a professional SIS design engineer. .