Siemens SIMATIC ET 200SP System Manual page 280

The following figure shows an example configuration with fail-safe modules. Voltage is
supplied by one power supply unit. Note, however, that the total current of the modules fed
by the power supply unit must not exceed the permissible limits. You can also use multiple
power supply units.
Figure 14-1 External protective circuit (surge filter) for ET 200SP with failsafe modules
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
14.3 Electromagnetic compatibility of fail-safe modules
Technical specifications
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