How To Configure Redundant I/O Modules - Siemens SIMATIC PCS 7 Function Manual

4.4.3

How to configure redundant I/O modules

Introduction
You configure the redundant I/O modules using HW Config.
Note
Redundant operation is possible only with certain S7-300 I/O modules of the ET 200M. For
additional information, please refer to the following documents:
● Documentation
● Manual
Note
Only input/output modules with the same article number and the same product version in
analog or digital version can be used.
Assigning redundant modules
Redundant modules can be assigned to each other for the ET 200M as follows:
● The modules are located in two different ET 200M stations on the same redundant
PROFIBUS DP (see sample configuration).
● The modules are located in two different ET 200M stations on different redundant
PROFIBUS DPs.
● The modules are located in the same ET 200M station.
Fault-tolerant Process Control Systems (V8.1)
Function Manual, 11/2014, A5E34878832-AA
PCS 7 - Released Modules
Automation System S7-400H; Fault-tolerant Systems
Advantages of fault-tolerant components
4.4 Distributed I/O
129