1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com

1-12 SIL PolicyCatalogNumberDescription1756-A-- ControlLogix Chassis 40,143,919 (2)Table 1.4ControlLogix Product Probability of Undetected Dangerous Failure per HourMean Time λ (5) Calculated PFH:Between Failure(MTBF) (1) 1oo1 architecture 1oo2 architecture(average (3) )2.49E-081.25E-091756-CNB ControlNet Bridge 3,596,087 (2) 2.78E-07 1.39E-081756-CNBR Redundant ControlNet Bridge 3,385,813 (2) 2.95E-07 1.48E-081756-IA16I AC Isolated Input 4,144,192 2.41E-07 1.74E-091756-IA8D AC Diagnostic Input 3,856,320 2.59E-07 1.87E-091756-IB16D DC Diagnostic Input 7,386,774 1.35E-07 9.63E-101756-IB16I DC Isolated Input 3,562,624 2.81E-07 2.03E-091756-IF8 Analog Input 1,690,694 5.91E-07 4.44E-091756-IR6I RTD Input 3,456,960 2.89E-07 2.10E-091756-IT6I Thermocouple Input 4,784,000 2.09E-07 1.50E-091756-L55M16 ControlLogix 5555 Processor 2,855,348 (2) 3.50E-07 1.75E-081756-OA16I AC Isolated Output 1,994,720 5.01E-07 3.72E-091756-OA8D AC Diagnostic Output 3,839,680 2.60E-07 1.30E-081756-OB16D DC Diagnostic Output 4,520,534 2.21E-07 1.11E-081756-OB16I DC Isolated Output 1,703,520 5.87E-07 4.40E-091756-OB8EI DC Fused Output 1,239,680 8.07E-07 6.20E-091756-OF8 Analog Output 2,054,694 4.87E-07 3.61E-091756-OX8I Contact Output 6,639,360 1.51E-07 1.07E-091756-PA75 AC Power Supply 7,301,935 (2) 1.37E-07 6.85E-091756-PA75R AC Redundant Power Supply 4,380,000,000 (2), (4) 2.28E-10 1.14E-111756-PB75 DC Power Supply 7,100,760 (2) 1.41E-07 7.04E-091756-PB75R DC Redundant Power Supply 4,380,000,000 (2), (4) 2.28E-10 1.14E-111756-PSCA Power Supply Chassis Adapter 45,146,727 (2) 2.21E-08 1.11E-09(1) MTBF measured in hours.(2) Calculated using field-based values for components.(3) Average = The arithmetic average of the MTBFs of all five Chassis (1756-A4, A7, A10, A13, and A17)(4)(5)Assumes that both power supplies fail simultaneously.λ = Failure Rate = 1/MTBFPublication 1756-RM001B-EN-P - October 2003