List Of Abbreviations - Pepperl+Fuchs SJ2-SN Manual

Functional Safety SJ2-SN, SJ3,5-S(1)N

List of Abbreviations

7 List of Abbreviations
d
DC
FIT
FMEDA

s

dd

du

no effect

not part

total (safety function)
HFT
MTBF
MTTF
D
MTTR
OSSD
PDDB
PFD
avg
PFH
PL
PLC
PTC
s
S
ao
S
ar
s
n
SC
SFF
SIL
T
1
18
Distance to the slot base
Diagnostic Coverage of dangerous faults
-9
Failure In Time in 10 1/h
Failure Mode, Effects, and Diagnostics Analysis
Probability of safe failure
Probability of dangerous detected failure
Probability of dangerous undetected failure
Probability of failures of components in the safety loop that have
no effect on the safety function.
Probability of failure of components that are not in the safety loop
Probability of failure of components that are in the safety loop
Hardware Fault Tolerance
Mean Time Between Failures
Mean Time To dangerous Failure
Mean Time To Restoration
Output Signal Switching Device
Proximity Device with Defined Behaviour under fault conditions
Average Probability of dangerous Failure on Demand
Average frequency of dangerous failure per hour
Performance Level
Programmable Logic Controller
Proof Test Coverage
Current operating distance (immersion depth)
Assured operating distance (immersion depth) of a PDDB
Assured release distance (immersion depth) of a PDDB
Rated immersion depth (lateral)
Systematic Capability
Safe Failure Fraction
Safety Integrity Level
Proof Test Interval