Rockwell Automation 5094-IA16 - FLEX 5000 I;O Safety Output Module Safety Data

Rockwell Automation Publication 5094-UM001E-EN-P - April 2020 193
Safety Data for I/O Modules Appendix D
FLEX 5000 I/O Safety
Output Module Safety Data
Tab le 69 lists the safety data for the 5094-OB16S and 5094-OB16SXT modules.
Table 69 - 5094-OB16S and 5094-OB16SXT Digital Safety Parameter Data
Attribute
Point Operation Type
Single Channel Dual Channel
Total Failure Rate (λ (safety related)) 2.0565E-06 2.5524E-06
Safe Failure Fraction (SFF) 99.977% 99.983%
Safe Failure Rate (λS) 1.3238E-06 1.5666E-06
Safe Detected Failure Rate (λSD) 1.32E-06 1.57E-06
Safe Undetected Failure Rate (λSU) 8.40E-10 6.86E-10
Diagnostic Coverage (DC) 99.937% 99.956%
Dangerous Failure Rate (λD) 7.3278E-07 9.8585E-07
Dangerous Detected Failure Rate (λDD) 7.3232E-07 9.8541E-07
Dangerous Undetected Failure Rate (λDU) 4.6523E-10 4.3173E-10
Diagnostic Test Interval (hours) 4 4
Hardware Fault Tolerance (HFT) 0 1
Spurious Trip Rate (STR) 5.68E-06 —
Mean Time to Failure, Spurious (MTTF-spurious), (hours) 176037 —
PFH (1/hours) 4.6523E-10 4.3173E-10
PFD
AVE
, at Mission Time of 20 years 4.0754E-05 3.7819E-05
Safety Reaction Time (SRT), (millisecond) 4.5 4.5