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Operation Manual Safety Module for b maXX 5000 BM5-O-SAF-000/-001
Document no.: 5.09013.07
APPENDIX A - ABBREVIATIONS
DC Diagnostic Coverage
EMC Electromagnetic compatibility
EN European standard
ESD Electrostatic sensitive device
EXT, ext External
I/O Input/Output
ISO International Organization for
Standardization
LED Light-emitting diode
MTTF
d
Mean Time To Failure
PFD Probability of Failure on Demand
(mean residual error probability of
a dangerous error on demand)
PFH Probability of Failure per Hour
SAF Safety module
SIL Safety Integrity Level
SFF Safe Failure Fraction (fraction of
failures which lead to safe status)
STO Safe Torque Off