Siemens CPU 410-5H Process Automation - Introduction to the I;O Link to Fault-Tolerant System

I/O configuration variants
4.4 Introduction to the I/O link to fault-tolerant system
CPU 410-5H Process Automation/CPU 410 SMART
56 System Manual, 10/2013, A5E32631667-AA
Figure 4-7 Example of redundancy in a 1-out-of-2 system with error
Failure of a redundancy node (total failure)
The following figure shows that the overall system is no longer operable, because both
subunits have failed in a 1-out-of-2 redundancy node (total failure).
Figure 4-8 Example of redundancy in a 1-out-of-2 system with total failure
4.4
Introduction to the I/O link to fault-tolerant system
I/O installation types
In addition to the power supply module and CPUs, which are always redundant, the
operating system supports the following I/O installation types. You specify the I/O installation
types in the configuration with HW Config.
Configuration
Availability
Single-channel switched
System-redundant
Two-channel redundant
Increased
Increased
High