Result When Using A 3Wl Circuit Breaker; Result When Using A Power Contactor - Siemens SINAMICS DCM User Manual

Evaluating the safety functions according to EN ISO 13849 when using one switching device
Determination of the PL E-Stop, channel 2
Parameter
MTTF
D
SINAMICS DCM E-Stop
DC
Measures against CCF
9.4

Result when using a 3WL circuit breaker

DETECT
EVALUATE
RESPOND
PL
Average probability of a dangerous
failure per hour
9.5

Result when using a power contactor

DETECT
EVALUATE
RESPOND
PL
Average probability of a dangerous
failure per hour
Application document for functional safety STO, SS1 (ISO 13849-1)
Compact User Manual, 09/2016, A5E34871844AM
Value
High
Low
Fulfilled
PL
e
e
d
Result
d
1.07 E-07
PL
e
e
d
Result
d
1.07 E-07
9.4 Result when using a 3WL circuit breaker
Reason
MTTF > 30 years (312 years)
D
DC = 67%
It is assumed that the user has taken the necessary
measures.
Average probability of a dangerous failure per hour
9.06 E-10
5.42 E-09
1.01 E-07
Reason
The PL of all tasks of the supplementary safety function is at
least d.
Average probability of a dangerous failure per hour
9.06 E-10
5.42 E-09
1.01 E-07
Reason
The PL of all tasks of the supplementary safety function is at
least d.
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