•
The STO is a type A safety component as defined in IEC 61508-2.
•
Relevant failure modes:
•
The STO trips spuriously (safe failure)
•
The STO does not activate when requested
•
A fault exclusion on the failure mode “short circuit on printed circuit board”
has been made (EN 13849-2, table D.5). The analysis is based on an
assumption that one failure occurs at one time. No accumulated failures
have been analyzed.
•
STO response times:
•
STO reaction time (shortest detectable break): 1 ms
•
STO response time: 2 ms (typical), 5 ms (maximum)
•
Fault detection time: Channels in different states for longer than 200 ms
•
Fault reaction time: Fault detection time + 10 ms.
•
Indication delays:
•
STO fault indication (parameter
31.22
) delay: < 500 ms
•
STO warning indication (parameter
31.22
) delay: < 1000 ms.
■
Terms and abbreviations
Description
Reference
Term or
abbreviation
Classification of the safety-related parts of a control
system 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.
EN ISO 13849-1
Cat.
Common cause failure (%)
EN ISO 13849-1
CCF
Diagnostic coverage (%)
EN ISO 13849-1
DC
Hardware fault tolerance
IEC 61508
HFT
Mean time to dangerous failure: (Total number of life
units) / (Number of dangerous, undetected failures)
during a particular measurement interval under stated
conditions
EN ISO 13849-1
MTTFD
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
IEC 61508
PFDavg
The Safe torque off function 427
Summary of Contents for ACS580 Series
Page 1: ...ABB GENERAL PURPOSE DRIVES ACS580 01 drives Hardware manual...
Page 2: ......
Page 4: ......
Page 19: ...Further information Table of contents 19...
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Page 163: ...R5 4 6 11 11 10 4 3 5 7 8 9 0 5 0 6 N m 0 4 lbf ft 8 4 Electrical installation Global IEC 163...
Page 207: ...R6 R9 11 11 7 3 9 5 10 6 4 R6 R9 0 4 lbf ft Electrical installation North America 207...
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Page 258: ...3a 3b 3c 4 5 7 6 2d 2a 2b 2c 258 Maintenance...
Page 364: ...Frame R1 IP21 UL Type 1 3AXD10000601652 364 Dimension drawings...
Page 365: ...Frame R1 IP55 UL Type 12 3AXD10000601699 Dimension drawings 365...
Page 366: ...Frame R1 IP55 F278 UL Type 12 366 Dimension drawings...
Page 367: ...Frame R1 IP66 UL Type 4X B066 3AXD50001012694 Dimension drawings 367...
Page 368: ...Frame R1 IP66 UL Type 4X B063 3AXD50001012694 368 Dimension drawings...
Page 369: ...Frame R1 IP66 UL Type 4X C193 3AXD50001012694 Dimension drawings 369...
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Page 459: ...Optional I O extension and adapter modules 459...
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