System overview
5.1 What is the S7-1500R/H redundant system?
S7-1500R/H redundant system
82 System Manual, 01/2024, A5E41814787-AF
S7-1500H
You connect the CPUs to the Industrial Ethernet over a PROFINET interface or using an
additional switch.
S7-1500H supports the following number of PROFINET devices (switches, S7-1500H CPUs,
S7-1500 CPUs (V2.5 or later), HMI devices, and IO devices such as ET 200MP and ET 200SP):
max. 50 in PROFINET ring
S7-1500H supports the following number of IO devices on the H-CPUs: max. 256 in PROFINET
network (ring, line or combined topology)
The redundancy connections in S7-1500H are two duplex fiber-optic cables that connect the
CPUs directly with plug-in synchronization modules.
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