System overview
5.1 What is the S7-1500R/H redundant system?
S7-1500R/H redundant system
74 System Manual, 01/2024, A5E41814787-AF
The figure below shows a configuration of the S7-1500H with R1 devices in a line topology
Redundancy connections (fiber-optic cables)
PROFINET cable (line topology 1)
PROFINET cable (line topology 2)
IO device (with R1 system redundancy)
Figure 5-8 S7-1500H configuration with R1 devices in a line topology
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):
Redundancy connections (fiber-optic cables)
Figure 5-9 S7-1500H configuration with additional devices
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