Tüv Certificate - ABB ACS880-34 Series Hardware Manual

Abbr. Reference
MTTF EN ISO 13849-1
D
PFD IEC 61508
avg
PFH IEC 61508
PL EN ISO 13849-1
SC IEC 61508
SFF IEC 61508
SIL IEC 61508
SILCL IEC/EN 62061
STO IEC/EN 61800-5-2
T IEC 61508-6
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T EN ISO 13849-1
M
￭ TÜV certificate
The TÜV certificate is available on the Internet at www.abb.com/drives/documents.
Description
Mean time to dangerous failure: (Total number of life units) / (Number
of dangerous, undetected failures) during a particular measurement
interval under stated conditions
Average probability of dangerous failure on demand, that is, mean
unavailability of a safety-related system to perform the specified safety
function when a demand occurs
Average frequency of dangerous failures per hour, that is, average
frequency of a dangerous failure of a safety related system to perform
the specified safety function over a given period of time
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 torque off
Proof test interval. T is a parameter used to define the probabilistic
1
failure rate (PFH or PFD) for the safety function or subsystem. Per-
forming a proof test at a maximum interval of T
the SIL capability valid. The same interval must be followed to keep
the PL capability (EN ISO 13849) valid.
See also section Maintenance.
Mission time: the period of time covering the intended use of the safety
function/device. After the mission time elapses, the safety device must
be replaced. Note that any T
guarantee or warranty.
The Safe torque off function 225
is required to keep
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values given cannot be regarded as a
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