Siemens Simatic S7-1500 - Terminal and Block Diagram of the Analog On-Board I;O

System overview
5.1 What is the S7-1500R/H redundant system?
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
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The following figure shows a configuration of the S7-1500H in a PROFINET ring.
①
H-CPU
②
PROFINET cable (PROFINET ring)
③
Redundancy connections (fiber-optic cables)
④
IO device
⑤
Switch
Figure 5-5 S7-1500H configuration with IO devices in the PROFINET ring