Siemens SIMATIC ET 200SP System Manual page 22

Example of a configuration with fail-safe I/O modules
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Figure 3-4
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
3.3 How are SIMATIC Safety F-systems structured with ET 200SP?
Interface module
Light-colored BaseUnit BU..D with infeed of supply voltage
Dark-colored BaseUnits BU..B for conducting the potential group further
I/O module
Server module (ships with the interface module)
Fail-safe I/O modules
BusAdapter
Mounting rail
Reference identification label
Example of a configuration of the ET 200SP with fail-safe I/O modules
System overview
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