Siemens SIMATIC PCS 7 System Manual page 68

I/O configuration variants
4.6 System and media redundancy at the PROFINET IO interface
Station numbers
The IO devices can be configured as one-sided or redundant. The station numbers must be
unique across both PROFINET IO interfaces and between 1 and 256.
PN/IO with system redundancy
The figure below shows the system-redundant connection of three IO devices using one
switch. Two additional IO devices are also connected in system redundancy.
Figure 4-13
The figure below shows the system-redundant connection of nine IO devices using three
switches. This configuration, for example, allows you to arrange IO devices in several
cabinets.
68
PN/IO with system redundancy
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB