Siemens SIMATIC S7-1500 System Manual page 285

Wiring
8.9 Connecting interfaces for communication with S7-1500H
Connecting PROFINET ring with S2 devices
Plug the RJ45 connectors of the PROFINET cable of the PROFINET ring respectively into the
RJ45 sockets of the PROFINET interfaces X1 P1R/X1 P2R of the two H-CPUs.
Figure 8-13
284
Connecting PROFINET ring with S2 devices
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF