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measured value goes beyond the measurement range, the transmitter enters saturation
mode.
The measurement signal used by the logic solver must be the analog 4-20 mA signal
proportional to the level or distance (ullage) generated. The HART
®
protocol can only be
used for setup, calibration, and diagnostic purposes, not for safety critical operation.
The Rosemount
™
5408:SIS Level Transmitter is IEC 61508 certified accordingly:
•
Low and high demand: Type B element
•
SIL 2 for random integrity @ HFT=0
•
SIL 3 for random integrity @ HFT=1
•
SIL 3 for systematic capability
Figure 8-1: SIF Configuration Examples
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A. Rosemount 5408:SIS Level Transmitter (sensor)
B. Logic-solver
C. Actuator
D. Single use 1oo1 (1-out-of-1) for SIL2 (SIL 2@ HFT=0)
E. Redundant use 1oo2 for SIL3 (SIL3@ HFT=1)
F. Redundant use 2oo3 for SIL3 (SIL3@ HFT=1)
Safety Instrumented Systems (SIS) requirements
Reference Manual
February 2020
00809-0100-4408
150
Reference Manual
Содержание Rosemount 5408
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Страница 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
Страница 10: ...Introduction Reference Manual February 2020 00809 0100 4408 10 Reference Manual ...
Страница 20: ...Transmitter overview Reference Manual February 2020 00809 0100 4408 20 Reference Manual ...
Страница 72: ...Mechanical installation Reference Manual February 2020 00809 0100 4408 72 Reference Manual ...
Страница 100: ...Operation Reference Manual February 2020 00809 0100 4408 100 Reference Manual ...
Страница 240: ...Product certifications Reference Manual February 2020 00809 0100 4408 240 Reference Manual ...
Страница 242: ...Product certifications Reference Manual February 2020 00809 0100 4408 242 Reference Manual ...
Страница 244: ...Product certifications Reference Manual February 2020 00809 0100 4408 244 Reference Manual ...
Страница 246: ...Product certifications Reference Manual February 2020 00809 0100 4408 246 Reference Manual ...
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