Siemens SIMATIC CPU 410

I/O configuration variants
6.7 Connection of two-channel I/O to the PROFIBUS DP interface
CPU 410 Process Automation/CPU 410 SMART
80 System Manual, 05/2017, A5E31622160-AC
6.7
Connection of two-channel I/O to the PROFIBUS DP interface
6.7.1
Connecting redundant I/O
Redundant I/O in the switched DP slave
To achieve this, the signal modules are installed in pairs in ET 200M distributed I/O devices
with active backplane bus.
Figure 6-13 Redundant I/O in the switched DP slave