Siemens SIMATIC ET 200SP HA, System Manual

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4.8 Redundancy and changes during operation
Introduction
This section describes the possibilities for increasing the availability of a plant with an IO device
based on the ET 200SP HA distributed I/O.
Basic redundancy configurations
You can increase the availability of the distributed I/O by implementing redundancy
configurations in the plant. Multiple redundancy configurations can be combined.
The figure below shows an example of some of the possible redundancy configurations:
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Configuration
①
Media redundancy
②
System redundancy
③
IO redundancy
Brief information Use Media Redundancy Protocol
(MRP) Connection via redundant media
(2 subnets) and/or redundant in‐
terface modules Use of redundant I/O modules in
an IO device
Configuration ex‐
ample: See sec‐
tion: Connection of the IO device via
media redundancy (Page 47) Connection of the IO device via
system redundancy (Page 44) IO redundancy (Page 49)
Figure 4-2 Redundancy configurations of the distributed I/O with ET 200SP HA
Plant planning
4.8 Redundancy and changes during operation
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD
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