Connecting A Fail-Safe Digital Input - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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Appendix
A.5 Connecting a fail-safe digital input
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.
Figure A-9
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 in one control cabinet.
Figure A-10
496
Connecting a PM-switching and PP-switching fail-safe digital output
Connecting a sensor, e.g. Emergency Stop mushroom pushbutton or limit switch
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
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