Siemens SIMATIC S7-1500 System Manual page 105

System overview
5.3 S7-1500 R/H-CPUs
The S7-1500R/H CPUs support MRP interconnection as of firmware version V2.9. Observe the
maximum number of devices that can be connected for R/H-CPUs. Additional information can
be found in the manuals for the R/H CPUs.
4 devices for MRP interconnection connections
2 MRP interconnection connections provide redundant coupling between 2 MRP rings. Four
devices are required for these 2 connections:
• One media redundancy interconnection manager (MIM)
• 3 media redundancy interconnection clients (MIC):
– Primary MIC
– Primary Coupled MIC
– Secondary Coupled MIC
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S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF