Abbreviations; Declaration Of Conformity - ABB ACS580-01 Hardware Manual

246 Safe torque off function
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Abbreviations

Abbr. Reference
Cat. EN ISO 13849-1:2015 Classification of the safety-related parts of a control system
CCF EN ISO 13849-1:2015 Common cause failure (%)
DC EN ISO 13849-1:2015 Diagnostic coverage
FIT IEC 61508
HFT IEC 61508
MTTF EN ISO 13849-1:2015 Mean time to dangerous failure: (The total number of life
D
PFD IEC 61508
avg
PFH IEC 61508
PL EN ISO 13849-1:2015 Performance level. Levels a...e correspond to SIL
SC IEC 61508
SFF IEC 61508
SIL IEC 61508
SILCL IEC 62061:2015
EN 62061:2005+
AC:2010+A1:2013+
A2:2015
STO IEC 61800-5-2:2016
EN 61800-5-2:2007
T1 IEC 61508-6
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Declaration of conformity

Declaration of conformity (3AXD10000302783) is available on the Internet. See
section Document library on the Internet
Description
in respect of their resistance to faults and their subsequent
behavior in the fault condition, and which is achieved by the
structural arrangement of the parts, fault detection and/or by
their reliability. The categories are: B, 1, 2, 3 and 4.
Failure in time: 1E-9 hours
Hardware fault tolerance
units) / (the number of dangerous, undetected failures)
during a particular measurement interval under stated
conditions
Average probability of dangerous failure on demand
Average frequency of dangerous failures per hour
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 torque off
Proof test interval. Proof test interval. T1 is a parameter
used to define the probabilistic failure rate (PFH or PFD) for
the safety function or subsystem. Performing a proof test at
a maximum interval of T1 is required to keep the SIL
capability valid. The same interval must be followed to keep
the PL capability (EN ISO 13849) valid. Note that any T1
values given cannot be regarded as a guarantee or
warranty.
See also section Maintenance
on the inside of the back cover.
on page 242.