Siemens SIMATIC Distributed I/O ET 200eco PN Operating Instructions Manual page 263

Fail-safe shutdown of ET 200eco PN standard modules
G.1 Back-up oriented shutdown of ET 200eco PN standard modules
Limits of the higher-level safety circuit
The ET 200eco PN standard modules do not fulfill any safety functions. Safety functions are
performed by the safety relay or the F-switch to bring the system into a safe state.
Adjust the operation inspection interval of the safety relay with relay output according to the
safety class.
Take the following measures if energy that is not provided by the higher-level safety circuit is
used to control the safety function.
Cover critical errors in the safety function that are not detected by the higher-level safety
circuit (e.g. 3SK1, F-switch etc.) with suitable safety measures. The "diagnostics" must be
performed indirectly via the controlled process.
Specifications for safety-relevant process data:
• Functionally safe
• Read via fail-safe inputs (e.g. F-DI)
• Fail-safe processing unit (e.g. F-CPU) for issuing commands
• Output through fail-safe outputs (e.g. F-DQ) to control the safety function
Requirements on the power supply
Operation requires a SELV/PELV power supply to limit overvoltages to L+ and M (24 V). This
measure prevents possible errors from the power supply side at the same time.
Select the power supply according to the requirements of the respective operating
instructions for the shutdown device or for the ET 200eco PN system.
You can find more information on safe SELV/PELV in the data sheets of the power supplies
used.
FAQ
Read the latest information on safety-related shutdown in the FAQ
(https://support.industry.siemens.com/cs/ww/en/view/39198632).
In this FAQ, you will find the SIMATIC standard modules that are suitable for safety-related
shutdown.
Request German Technical Inspectorate report (Report no. SN95432T)
You can request copies of the German Technical Inspectorate report at the following address:
SIEMENS AG
Digital Industries
DI FA SEA SYS DE AMB
Postfach 1963
D-92209 Amberg
264
Operating Instructions, 06/2022, A5E01250250-AN
ET 200eco PN