2IEC.IEC61511-1~3Functional Safety-safety InstrumentedSystems for the Process Industry Sector[S].IEC,2004.
3IEC.IEC61508-1~6Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems,International Electrotechnical Commission[S].IEC,2000.
4ISA.ISA-TR84.00.0—2002Safety Instrumented Functions(SIF)-Safety Integrity Level(SIL)Evaluation Techniques[S].The Instrumentation System and AutomationSociety,2002.