Siemens SIMATIC S7-1500 System Manual page 228

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②
Figure 6-61
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②
Figure 6-62
Maximum number of PROFINET devices, IO devices in the redundant system
The table below shows the maximum number of PROFINET devices, IO devices in the
redundant system.
Table 6- 6
Maximum number of devices
Maximum number of PROFINET devices in the
PROFINET ring of the R/H system
The maximum number includes configured switches,
S7-1500R/H CPUs, S7-1500 CPUs (as of V2.5), HMI
devices and IO devices. It does not include media
converters.
Maximum number of connectable IO devices at
the R/H CPUs
1)
2)
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
First R-CPU
Second R-CPU
Assignment of slot addresses in the R-CPUs (configuration example)
First H-CPU
Second H-CPU
Assignment of slot addresses in the H-CPUs (configuration example)
Number of PROFINET devices, IO devices in the redundant system
2)
Recommendation: The number of devices in the PROFINET ring affects the availability of the S7-
1500R system. The number of PROFINET devices including R-CPUs in the PROFINET ring should not
exceed 16. If you operate significantly more devices in the PROFINET ring, the availability is re-
duced.
The technical specifications in the documentation are based on the recommended maximum of 16
PROFINET devices in the ring in S7-1500R.
The maximum number includes connected DP Devices at the IE/PB LINK HA.
Application planning
6.6 Hardware configuration
Maximum number of Maximum number
S7-1500R of S7-1500H
50 (Recommendation 50
16)
1)
64 256
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