Redundancy scenario
① Primary CPU (S7-1500H)
② Backup CPU (S7-1500H)
③ Two fiber-optic cables (redundancy connections)
④ PROFINET cable (line topology 1)
⑤ PROFINET cable (line topology 2)
⑥ IO device ET 200SPHA
⑦ PROFINET lines → interrupted
⑧ IO device ET 200SP
Figure 5-33Failure of the two PROFINET lines between two R1 devices in a line topology
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Application planning
5.4 Redundancy scenarios
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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