•
The following temperature profile is used in safety value calculations:
•
670 on/off cycles per year with Δ
T = 71.66 °C
•
1340 on/off cycles per year with Δ
T = 61.66 °C
•
30 on/off cycles per year with Δ
T = 10.0 °C
•
32 °C board temperature at 2.0% of time
•
60 °C board temperature at 1.5% of time
•
85 °C board temperature at 2.3% of time.
•
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:
-
Frames R3 and R6: 2 ms (typical), 10 ms (maximum)
-
Frame R8: 2 ms (typical), 15 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
238 The Safe torque off function
Summary of Contents for ACH580-31
Page 1: ... ABB INDUSTRIAL DRIVES ACH580 31 drives Hardware manual ...
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Page 130: ...R3 Max 250 mA 130 Electrical installation North America NEC ...
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Page 166: ... Fan arrow must point up 166 Maintenance ...
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Page 214: ...R3 IP21 UL Type 1 3AXD50000028643 214 Dimension drawings ...
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Page 216: ...R6 IP21 UL Type 1 3AXD50000037446 216 Dimension drawings ...
Page 217: ...R6 Option B056 IP55 UL Type 12 3AXD50000045351 Dimension drawings 217 ...
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Page 275: ...CMOD 01 multifunction extension module external 24 V AC DC and digital I O 275 ...
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Page 282: ...282 CMOD 02 multifunction extension module external 24 V AC DC and isolated PTC interface ...