Siemens SINAMICS DCM User Manual page 6

Table of contents
7 STO stop Category 0, several power units ..................................................................................... 39
7.1 Description .........................................................................................................................39
7.2 STO circuit example with two power units and circuit breakers............................................40
7.3 STO circuit example with two power units and power contactors .........................................41
8 SS1 stop Category 1 for several power units .................................................................................. 43
8.1 Description .........................................................................................................................43
8.2 SS1 circuit example with two power units and circuit breakers ............................................45
8.3 SS1 circuit example with two power units and circuit breakers ............................................46
9 Evaluating the safety functions according to EN ISO 13849 when using one switching device .............. 47
9.1 Evaluation of "Detect" .........................................................................................................48
9.2 Evaluation of "Evaluate" .....................................................................................................49
9.3 Evaluation of "Respond" .....................................................................................................50
9.3.1 Evaluation of "Respond" with one power switching device ..................................................50
9.3.1.1 Evaluation of an 3WL circuit breaker...................................................................................50
9.3.1.2 Evaluation of a power contactor ..........................................................................................52
9.4 Result when using a 3WL circuit breaker ............................................................................53
9.5 Result when using a power contactor .................................................................................53
10 Evaluating the safety functions according to EN ISO 13849 when using two switching devices............. 55
10.1 Evaluation of "Detect" .........................................................................................................56
10.2 Evaluation of "Evaluate" .....................................................................................................57
10.3 Evaluation of "Respond" .....................................................................................................58
10.3.1 Evaluation of "Respond" with two power switching devices .................................................58
10.3.1.1 Evaluation of two 3WL circuit breakers connected in series ................................................58
10.3.1.2 Evaluation of two power contactors connected in series......................................................59
10.3.2 Result of "Respond" with two 3WL circuit breakers .............................................................60
10.3.3 Result of "Respond" with two power contactors ..................................................................60
10.4 Result when using two 3WL circuit breakers .......................................................................60
10.5 Result when using two power contactors ............................................................................61
11 Evaluation of the safety function according to EN 62061 .................................................................. 63
11.1 Evaluation of "Detect" .........................................................................................................64
11.2 Evaluation of "Evaluate" .....................................................................................................65
11.3 Evaluation of "Respond" .....................................................................................................66
11.3.1 Evaluation of "Respond" with two power switching devices .................................................66
11.3.1.1 Evaluation of two 3WL circuit breakers ...............................................................................66
11.3.1.2 Evaluation of two power contactors ....................................................................................67
11.3.2 Result "Respond" when using two 3WL circuit breakers ......................................................67
11.3.3 Result "Respond" when using two power contactors ...........................................................68
11.4 Result when using two 3WL circuit breakers .......................................................................68
11.5 Result when using two power contactors ............................................................................69
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Application document for functional safety STO, SS1 (ISO 13849-1)
Compact User Manual, 09/2016, A5E34871844AM