The certificate shows that a component/subsystem can be used in a specific application according to a requirement class (RC) or a integrity level (SIL). The system integrator and end user must always be aware of how to use certified components/subsystems in safety-related function, respectively a safety instrumented system. Because of the many different possibilities for how to configure a safety system, the end user must get the related information from the manufacturer of the certified component/subsystem. ISO 14001 is an international standard that specifies a process for controlling and improving a company's environmental performance.

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