7 Safety parameters
Note1: The 9113 contains no lifetime limiting components, therefore the PFH figures are valid
for up to 12 years, according to IEC 61508.
8 Hardware and software configuration
All configurations of software and hardware versions are fixed from factory, and cannot be
changed by end-user or reseller.
This manual only covers products labelled with the product version (or range of versions)
specified on the front page.
9 Failure category
Failure category Failure rates (1/h)
Fail Safe Detected 0.000E-0
Fail Safe Undetected 2.34E-7
Fail Dangerous Detected 3.67E-7
Fail Dangerous Undetected 6.10E-8
Probability of dangerous Failure per Hour (PFH) 6.10E-08
Note
1
Probability of failure on demand (PFD) -
1 year proof test interval
3.96E-04
Proof test interval (10% of loop PFD) 3 years
Safe Failure Fraction 90.7 %
Demand response time Signal input: < 0.5 seconds
Temperature input: < 1.1 seconds
Demand mode High
Demand rate 3000 seconds
Mean Time To Repair (MTTR) 24 hours
Diagnostic test interval 30 seconds
Hardware Fault Tolerance (HFT) 0
Component Type B
SIL capability SIL 2
Description of the “Safe State” Output ≤ 3.6 mA or
output ≥ 21 mA
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