Siemens SIMATIC S7-1500 System Manual page 42

System overview
4.2 Configuration
Configuration example
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③
④
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Figure 4-16 Example configuration of redundant system with two CPUs 1518HF-4 PN in PROFINET ring
NOTE
Other configuration variants as of FW version V3.0 of the CPU 1518HF-4 PN
As of FW version V3.0, the HF system supports additional functions and configuration
variants:
• System redundancy R1
• HF CPUs do not have to be part of a PROFINET ring or MRP domain.
This makes additional topology variants possible, such as line topology, combined
topology, or setup without additional devices.
Reference
For more information on the configuration variants, refer to the section Specific configuration
variants for S7-1500H (Page 80).
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CPU 1518HF-4 PN
Redundancy connections (fiber-optic cables)
ET 200SP IO device
PROFINET cable (PROFINET ring)
ET 200MP IO device with fail-safe and non-fail-safe modules
ET 200SP IO device with fail-safe and non-fail-safe modules
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD