Siemens SIMATIC S7-1500 System Manual page 195

Connecting line topology with R1 devices
Connect the devices of the line topology with the PROFINET cables as shown in the following
figure:
①
②
Figure 7-16 Connect line topology with R1 devices to S7-1500H
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
H-CPU with redundancy ID 1
H-CPU with redundancy ID 2
7.9 Connecting interfaces for communication with S7-1500H
Wiring
195