Pepperl+Fuchs SMART KCD2-STC-1 - List of Abbreviations

2020-04
20
Functional Safety KCD2-STC-(Ex)1(.SP), HiC2025(A)
List of Abbreviations
7 List of Abbreviations
ESD Emergency Shutdown
FIT Failure In Time in 10
-9
1/h
FMEDA Failure Mode, Effects, and Diagnostics Analysis

s
Probability of safe failure

dd
Probability of dangerous detected failure

du
Probability of dangerous undetected failure

no effect
Probability of failures of components in the safety loop that have
no effect on the safety function.

not part
Probability of failure of components that are not in the safety loop

total (safety function)
Probability of failure of components that are in the safety loop
HFT Hardware Fault Tolerance
MTBF Mean Time Between Failures
MTTR Mean Time To Restoration
PCS Process Control System
PFD
avg
Average Probability of dangerous Failure on Demand
PFH Average frequency of dangerous failure per hour
PLC Programmable Logic Controller
PTC Proof Test Coverage
SC Systematic Capability
SFF Safe Failure Fraction
SIF Safety Instrumented Function
SIL Safety Integrity Level
SIS Safety Instrumented System
T
1
Proof Test Interval