Siemens SIMATIC S7-400H - Supported Communication Services; Communications via Fault-tolerant S7 Connections

Using I/Os in S7–400H
13.4 Connecting redundant I/O to the PROFIBUS DP interface
S7-400H
178 System Manual, 03/2012, A5E00267695-11
Configurations
The following redundant I/O configurations are supported:
1. Redundant signal modules in the central and expansion devices
For this purpose, the signal modules are installed in pairs in the CPU 0 and CPU 1
subsystems. Redundant I/O in central and expansion devices
5HGXQGDQWPRGXOHSDLU
&HQWUDOGHYLFH
&HQWUDOGHYLFH
5HGXQGDQWPRGXOHSDLU
([SDQVLRQXQLW
([SDQVLRQXQLW
Figure 13-3 Redundant I/O in central and expansion devices