SIL Interface Module
Calculated Values of the SIL * Interface Module (SIM)
|
Architecture |
SIM |
|||||
|---|---|---|---|---|---|---|
|
PFH* |
PFD* |
SFF* |
HFT* |
MTTFd (years) |
DC* |
|
|
Wiring Category 1* |
2.10 – 10 |
2.10 – 5 |
>90% |
1 |
17,459 |
Not relevant |
|
Wiring Category 2 |
>99% |
90% |
||||
|
Wiring Category 3 |
>99% |
90% |
||||
|
Wiring Category 4 |
99% |
99% |
||||
NOTE: PFD and PFH values are calculated with the following:
Architectural requirements defined in IEC 61508-2 Table 3 and EN 62061 Table 5 are met for levels up to SIL 3.