Safe Technical Specifications - Siemens SIMATIC ET 200SP Manual

Technical specifications

9.3 Safe technical specifications

9.3 Safe technical specifications
Safety characteristics
Table 9- 1 Maximum achievable safety class in safety mode
Standard
SIL according to IEC 61508
EN ISO 13849-1
1)
1) Performance Level
Table 9- 2 Safety characteristics
Characteristic
High Demand according to SIL 3
Total value for AS-i system with the F-CM AS-i Safety ST
module
2)
Individual value for F-CM AS-i Safety ST
Individual value for AS-Interface transfer procedure
Individual value for AS-Interface slave
Proof test interval
Low Demand according to SIL 3
Total value for AS-i system with the F-CM AS-i Safety ST
module
2)
Individual value for F-CM AS-i Safety ST
Individual value for AS-Interface transfer procedure
Individual value for AS-Interface slave
Mean Time To dangerous Failure
Diagnostic Coverage level
Common Cause Failure
1) Probability of a dangerous failure in the case of an operating mode with high or continuous demand rate
2) Value "0" as an approximation for the individual value for AS-Interface slave applies only under the assumption that the
PFH or PFD value of the AS-i slave is comparatively low and, thus, the PFH
D
contributed significantly to the PFH
the safe AS-i slaves and use the specific values of the manufacturer.
3) Probability of a dangerous failure in the case of an operating mode with lower demand rate
94
1)
2)
3)
2)
or PFD value of the total system. For this, observe the technical specifications of
D
Designation Value
SIL 3
PL e
Category 4
Designation Value
PFH 1.00 x 10
-9
D
1.89 x 10
-9
PFH 0.89 x 10
-9
D
PFH 1.00 x 10
-9
D
PFH 0
D
T1 20 years
PFD 2.00 x 10
-5
1.55 x 10
-5
PFD 0.55 x 10
-5
PFD 1.00 x 10
-5
PFD 0
MTTF ≥100 years
d
(37 000 years)
High (according to EN ISO 13849-1)
DC >99 %
CCF 75 points
(requirements met according to
EN ISO 13849-1)
or PFD value of the AS-i slave does not
D
Fail-safe Module F‑CM AS‑i Safety ST (3RK7136‑6SC00‑0BC1)
Manual, 03/2017, A5E03957059020A/RS-AB/002
x 1 / h
x 1 / h
x 1 / h
x 1 / h