The Basic System For Redundant Operation; Figure 2-3 Hardware Of The S7-400H Basic System - Siemens CPU 410-5H Process Automation System Manual

Power supply
You require a power supply module from the standard system range of the S7-400.
To increase availability of the power supply, you can also use two redundant power supplies.
In this case, you use the power supply modules PS 405 R / PS 407 R.
A combination of these can also be used in redundant configurations (PS 405 R with
PS 407 R).
Operation
The operation of a CPU 410-5H requires a system expansion card. The system expansion
card specifies the maximum number of process objects that can be loaded to the CPU and
saves the license information in case of a system expansion. The system expansion card
forms a hardware unit with the CPU 410-5H.
2.4

The basic system for redundant operation

Hardware of the basic system
The basic system consists of the hardware components required for a fault-tolerant
controller. The following figure shows the components in the configuration.
The basic system can be expanded with standard modules of the S7-400. There are
restrictions for the function modules and communication processors. See Appendix Function
and communication modules that can be used in a redundant configuration (Page 305).
Figure 2-3 Hardware of the S7-400H basic system
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Introduction to CPU 410-5H
2.4 The basic system for redundant operation
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