Figure 13-3 Redundant I/O In Central And Expansion Devices - Siemens SIMATIC S7-400H System Manual

Fault-tolerant systems

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Table of Contents

Using I/Os in S7–400H

13.4 Connecting redundant I/O to the PROFIBUS DP interface

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

Redundant I/O in central and expansion devices

System Manual, 03/2012, A5E00267695-11