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Application document for functional safety STO, SS1 (ISO 13849-1)

Compact User Manual, 09/2016, A5E34871844AM

Table of contents

1 Introduction................................................................................................................................. 11

1.1 Important note ................................................................................................................... 11

1.2 Preliminary remarks........................................................................................................... 11

1.2.1 Safe Torque Off (STO) ...................................................................................................... 12

1.2.2 Safe Stop 1 (SS1, time-controlled) ..................................................................................... 12

1.2.3 Using EMERGENCY STOP ............................................................................................... 13

1.3 Application overview .......................................................................................................... 13

1.4 Armature circuit with one switching device ......................................................................... 14

1.5 Armature circuit with two switching devices ........................................................................ 14

1.6 Field circuit description ...................................................................................................... 15

1.7 Safety shutdown (E-STOP)................................................................................................ 16

1.8 Parameterizing the digital outputs ...................................................................................... 17

1.9 Parameterizing the digital input for SS1 OFF3 ................................................................... 18

1.10 Abbreviations and circuit diagram symbols ........................................................................ 19

2 Principle of the dual channel architecture ....................................................................................... 21

3 STO stop Category 0 with one switching device .............................................................................. 23

3.1 Description ........................................................................................................................ 23

3.2 STO circuit example with one 3WL circuit breaker ............................................................. 24

3.3 STO circuit example with one power contactor................................................................... 25

4 SS1 stop Category 1 with one switching device ............................................................................... 27

4.1 Description ........................................................................................................................ 27

4.2 SS1 circuit example with one 3WL circuit breaker .............................................................. 28

4.3 SS1 circuit example with one power contactor ................................................................... 29

5 STO, two switching devices in series ............................................................................................. 31

5.1 Description ........................................................................................................................ 31

5.2 STO circuit example with two 3WL circuit breakers connected in series ............................. 32

5.3 STO circuit example with two power contactors connected in series .................................. 33

6 SS1, two switching devices connected in series .............................................................................. 35

6.1 Description ........................................................................................................................ 35

6.2 SS1 circuit example with two 3WL circuit breakers connected in series .............................. 36

6.3 SS1 circuit example with two power contactors connected in series ................................... 37

Siemens SINAMICS DCM User Manual

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