A.5
Connecting a fail-safe digital input
The following examples show the interconnection of a fail-safe digital input corresponding to
PL d according to EN 13849-1 and SIL2 according to IEC61508. You can find additional
examples and information in the "Safety Integrated" function manual.
Special requirements placed on EMC-compliant installation
Use shielded signal cables. Connect the shield at both conductor ends.
In order to connect two or more inverter terminals, use the shortest possible jumpers directly
at the terminals themselves.
PM-switching and PP-switching fail-safe digital outputs
The inverter allows a fail-safe PM-switching digital output as well as a PP-switching fail-safe
digital output to be connected.
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0
0
3
3
3
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0
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Figure A-9
Connecting a PM-switching and PP-switching fail-safe digital output
Connection examples
The following examples comply with PL d according to EN 13849-1 and SIL2 according to IEC
61508 for the case that all components are installed within one control cabinet.
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9RXW
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*1'
Figure A-10 Connecting a sensor, e.g. Emergency Stop mushroom pushbutton or limit switch
Appendix
A.5 Connecting a fail-safe digital input
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
451
