Siemens SIMATIC S7-1500 System Manual page 75

System overview
5.1 What is the S7-1500R/H redundant system?
The figure below shows a configuration of the S7-1500H with R1 devices in a line topology
①
②
③
④
⑤
Figure 5-8
S7-1500H without additional devices at the X1 interface of the H-CPUs
The configuration with only 2 H-CPUs is suitable for all applications that do not require any
additional devices at the PROFINET interface X1 P1R/X1 P2R of the H-CPUs (e.g. Modbus, TCP,
OPC UA server, Open User Communication, Web API of the Web server):
①
②
Figure 5-9
74
H-CPU
Redundancy connections (fiber-optic cables)
PROFINET cable (line topology 1)
PROFINET cable (line topology 2)
IO device (with R1 system redundancy)
S7-1500H configuration with R1 devices in a line topology
H-CPU
Redundancy connections (fiber-optic cables)
S7-1500H configuration with additional devices
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF