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Jadu345 · Junior 2 Joined: 29 Oct 2018 Posts: 32

How do you do a fail-safe switch-off of standard modules?
https://support.industry.siemens.com/cs/document/39198632/
Only the modules listed in these tables may be used for applications in which you are to do a fail-safe switch-off of SIMATIC standard modules.

The listed modules have no safety function. The safety function is triggered by the higher-level safety relay. This puts or holds the system in a safe state. You should follow the safety notes of the safety relay used accordingly.
The following holds for a potential group in which the listed modules are located (except in the case of ET 200AL and ET 200eco PN M12-L):
You may not use any additional standard digital input modules, standard analog input modules, counter modules etc. You must establish a separate potential group for these.

The "Fail-safe switch-off of standard modules" function is enabled up to a maximum operating altitude of 2000m.
Requirements for the power supply:
For operation, you need a power supply to master overvoltages at P and M (24V). This also masters any possible common cause errors on the power supply side.
You should select the power supply unit according to the specifications in the corresponding operating instructions for the switch-off device or system concerned.
Detailed information about protective extra low voltages (SELV/PELV) is available in the data sheets of the power supplies to be used.
Plants with fail-safe features are subject to special requirements regarding operating safety on the operator's side.

ET 200SP
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200MP/S7-1500
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200eco PN
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200AL
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200pro
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200M/S7-300
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf
ET 200S
https://support.industry.siemens.com/cs/attachments/39198632/39198632_Wiring_Example_en.pdf

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