Siemens PM330 - External Power Supply for 3 SK1 and PM330

Appendix
A.3 Application examples for functional safety (STO / SS1-t)
Power Module PM330
Hardware Installation Manual, 12/2018, A5E32844552B AF
125
A.3.2.3
External power supply for 3SK1 and PM330
Figure A-3 External power supply for 3SK1 and PM330
Information about the application example
● The 3SK1 is externally supplied with 24 V DC through an SELV/PELV power source.
● The PM330 control is externally supplied with 24 V DC through an SELV/PELV power
source.
-> parasitic voltages can occur and/or faults and disturbances can be coupled-in.