Emerson Rosemount 5400 Series - References; Specifications; Failure Rate Data; Useful Lifetime

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Reference Manual
00809-0100-4026, Rev HA
Section 8: Safety Instrumented Systems (4-20 mA Only)
November 2014
Safety Instrumented Systems (4-20 mA Only)
8.7 References
8.7.1 Specifications
The Rosemount 5400 Series must be operated in accordance with the functional and
performance specifications provided in Appendix A: Reference Data.
8.7.2 Failure rate data
The FMEDA report includes failure rates and common cause Beta factor estimates. The full
report is accessible at www.emersonprocess.com/rosemount/safety/PriorUse.htm.
8.7.3 Useful lifetime
The established failure rates of electrical components apply within the useful lifetime, which
should be based on experience. According to IEC 61508-2, 7.4.7.4, note 3, the useful lifetime
often lies within a range of 8 to 12 years for transmitters.
8.8 Spare parts
Additional spare parts are available in Appendix A: Reference Data.
8.9 Terms and definitions
FMEDA
Failure Modes, Effects and Diagnostic Analysis
HART
Highway Addressable Remote Transducer
PFD
AVG
Average Probability of Failure on Demand
SFF
Safe Failure Fraction
SIF
Safety Instrumented Function
SIL
Safety Integrity Level, discrete level (one out of a possible four) for specifying the safety integrity
requirements of the safety functions to be allocated to the E/E/PE safety-related systems, where
Safety Integrity Level 4 has the highest level of safety integrity, and Safety Integrity Level 1 has
the lowest.