YASKAWA iC9200 Series

HB700 | CPU | PMC921xEx | en | 24-04 157
iC9200 Series
Deployment CPU iC921xM-FSoE
Functional safety - safety relevant parameters
Safety relevant parameters The values specified here refer exclusively to the safety CPUs specified in this manual.
Safety-relevant parameters can always be found in the corresponding manuals of the
modules.
NOTICE
After expiry of the device life time, the safety CPU must be decommissioned
and returned to the vendor!
Parameters according to
DIN EN ISO 13849-1
Value Meaning
Performance level max. e Measure of the reliability of a safety function.
Category max 4 Measure of resistance to errors.
PFH
D
1 * 10-9/h Probability of Failure per Hour:
Probability of dangerous error per hour
.
DCavg 99% Diagnostic Coverage average:
Medium level of diagnostic coverage.
MTTF
D
> 80 years Mean Time To dangerous Failure:
A
verage time to a dangerous failure.
Parameters according to
IEC 62061
Value Meaning
SIL CL: max 3 Safety Integrity Level Claim Limit
Safety requirement level for classifying the functional safety of the subsystem.
PFH
D
1 * 10-9/h Probability of Failure per Hour:
Residual error rate of dangerous error per hour
.
HFT 1 Hardware Fault Tolerance
Number of faults that can result in a loss of the safety function.
Lifetime 300 month Device lifetime
No maintenance is required during the expected device lifetime.
SFF 99% Safe Failure Fraction:
Proportion of failures that result in the safety state.
Parameters according to
IEC 61508
Value Meaning
SIL max 3 Safety Integrity Level
Safety requirement level for the classification of functional safety
.
PFH
D
1 * 10-9/h Probability of Failure per Hour:
Residual error rate of dangerous error per hour
.
HFT 1 Hardware Fault Tolerance
Number of faults that can result in a loss of the safety function.
Lifetime 300 month Device lifetime
No maintenance is required during the expected device lifetime.