IDEC FS1A-C11S, User Manual

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PRODUCT SPECIFICATIONS
2-6
Safety performance
In the case of using safety outputs as dual channel outputs, SafetyOne can be used in a system
for control category B to 4 and performance level a to e in accordance with EN ISO13849-1.
In the case of using safety outputs as single channel outputs, SafetyOne can be used in a
system for control category B to 3 and performance level a to d in accordance with EN
ISO13849-1.
Average probability of failure on demand (PFD) and Probability of a dangerous failure
per hour (PFH)
・
In the case of using safety outputs as dual channel outputs
The following table describes PFD and PFH in the case of dual channel outputs. They are
needed for calculation of safety integrity level (SIL) which is applied to a system with SafetyOne.
In this case SafetyOne can be used in a system for SIL 1 to 3 in accordance with IEC61508.
Proof test interval l Note
Average Probability of Failure
on Demand (PFD) Probability of a dangerous Failure per
Hour (PFH)
6 months < 2.1 x 10
-5
< 7.1 x 10
-9
1 year < 3.6 x 10
-5
2 years < 6.7 x 10 -5
5 years < 1.6 x 10
-4
(SIL2)
10 years < 3.2 x 10
-4
(SIL2)
In this case SafetyOne can be used in a system for SIL 1 to 3 in accordance with IEC/EN62061.
Proof test interval
Note
Probability of a dangerous Failure per Hour (PFH)
10 years < 1.4 x 10 -8
・
In the case of using safety outputs as single channel outputs
The following table describes PFD and PFH in the case of single channel outputs. They are
needed for calculation of safety integrity level (SIL) which is applied to a system with SafetyOne.
In this case SafetyOne can be used in a system for SIL 1 to 2 in accordance with IEC61508.
Proof test interval
Note
Average Probability of Failure
on Demand (PFD) Probability of a dangerous Failure per
Hour (PFH)
6 months < 4.1 x 10
-5
< 1.6 x 10 -8
1 year < 7.5 x 10 -5
2 years < 1.5 x 10
-4
5 years < 3.6 x 10
-4
10 years < 7.0 x 10
-4
In this case SafetyOne can be used in a system for SIL 1 to 2 in accordance with IEC/EN62061.
Proof test interval
Note
Probability of a dangerous Failure per Hour (PFH)
10 years < 2.0 x 10
-8
Note. Refer to Maintenance and Inspection in “APPENDIX” for proof test procedure.