1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com
1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com
1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com
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Appendix ESample Probability of Failure onDemand (PFD) CalculationsProof Test Interval = 2 YearsTable E.1 shows PFD calculations for a proof test <strong>in</strong>terval of 2 years.Table E.1 <strong>ControlLogix</strong> Product Probability of Failure on Demand Calculations – Proof Test Interval of 2 YearsCatalogNumberDescription<strong>1756</strong>-Axx <strong>ControlLogix</strong> Chassis 40,143,919 (2)Mean Time λ (5) Calculated PFD:Between Failure(MTBF) (1) 1oo1 architecture 1oo2 architecture(average (3) )2.49E-081.10E-05<strong>1756</strong>-CNB ControlNet Bridge 3,596,087 (2) 2.78E-07 1.23E-04<strong>1756</strong>-CNBR Redundant ControlNet Bridge 3,385,813 (2) 2.95E-07 1.31E-04<strong>1756</strong>-IA16I AC Isolated Input 4,144,192 2.41E-07 8.70E-06<strong>1756</strong>-IA8D AC Diagnostic Input 3,856,320 2.59E-07 9.37E-06<strong>1756</strong>-IB16D DC Diagnostic Input 7,386,774 1.35E-07 4.83E-06<strong>1756</strong>-IB16I DC Isolated Input 3,562,624 2.81E-07 1.02E-05<strong>1756</strong>-IF8 Analog Input 1,690,694 5.91E-07 2.22E-05<strong>1756</strong>-IR6I RTD Input 3,456,960 2.89E-07 1.05E-05<strong>1756</strong>-IT6I Thermocouple Input 4,784,000 2.09E-07 7.51E-06<strong>1756</strong>-L55M16 <strong>ControlLogix</strong> 5555 Controller 2,855,348 (2) 3.50E-07 1.55E-04<strong>1756</strong>-OA16I AC Isolated Output 1,994,720 5.01E-07 1.86E-05<strong>1756</strong>-OA8D AC Diagnostic Output 3,839,680 2.60E-07 1.15E-04<strong>1756</strong>-OB16D DC Diagnostic Output 4,520,534 2.21E-07 9.80E-05<strong>1756</strong>-OB16I DC Isolated Output 1,703,520 5.87E-07 2.20E-05<strong>1756</strong>-OB8EI DC Fused Output 1,239,680 8.07E-07 3.09E-05<strong>1756</strong>-OF8 Analog Output 2,054,694 4.87E-07 1.80E-05<strong>1756</strong>-OX8I Contact Output 6,639,360 1.51E-07 5.38E-061 Publication <strong>1756</strong>-<strong>RM001B</strong>-<strong>EN</strong>-P - October 2003
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