Pepperl+Fuchs KFD2-UT2 Series User Manual

Functional Safety KFD2-UT2-(Ex)*(-1)
List of Abbreviations
2019-10
25
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. The no effect failure is not used
for calculation of SFF.

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
T
service
Time from start of operation to putting the device out of service

Pepperl+Fuchs KFD2-UT2 Series Specifications

General

Brand	Pepperl+Fuchs
Model	KFD2-UT2 Series
Category	Media Converter
Language	English