Safety Data (Sil, Pl) - ABB ACS880-07 Hardware Manual

222 Safe torque off function

Safety data (SIL, PL)

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Abbr. Reference
CCF EN ISO 13849-1
DC EN ISO 13849-1
FIT IEC 61508
HFT IEC 61508
MTTF EN ISO 13849-1
d
PFD IEC 61508
PFH IEC 61508
D
PL EN ISO 13849-1
SC IEC 61508
SFF IEC 61508
SIL IEC 61508
SILCL EN 62061
SS1 IEC/EN 61800-5-2
STO IEC/EN 61800-5-2
T1 IEC 61508
Description
Common cause failure (%)
Diagnostic coverage
Failure in time: 1E-9 hours
Hardware fault tolerance
Mean time to dangerous failure: (The total number of life units) / (the
number of dangerous, undetected failures) during a particular
measurement interval under stated conditions
Probability of failure on demand
Probability of dangerous failures per hour
Performance level. Levels a...e correspond to SIL
Systematic capability
Safe failure fraction (%)
Safety integrity level (1...3)
Maximum SIL (level 1...3) that can be claimed for a safety function or
subsystem
Safe stop 1
Safe torque off
Proof test interval