SMC Networks EX245-FPS1 - 22 Appendix F: Safety Characteristics

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No.EX##-OMY0004
22. Appendix F: Safety Characteristics
Operation
Item
Output with Two
Channel
Input
Outputs
(only)
Two Channel
Input (only)
Output with
Single Channel
Input
Single Channel
Input (only)
SFF
99.98%
99.98%
PFDAV (T)
Average Probability of
Dangerous Failure
1% of 10
-3
1% of 10
-2
PFH (T)
Probability of dangerous
failure per hour
1% of 10
-7
1% of10
-6
Achievable Safety Level
SIL3 / PL e
SIL2 / PL d
Comment:
The Outputs and internal Safety Logic always operate in Two-Channel Mode.
The Module achieves with or without Two-Channel-Inputs Safety Level SIL3 / PL e.
In combination with Single-Channel-Inputs the Module can only achieve SIL2 / PL d.