Introduction to the CPU 410
2.5 Rules for H station assembly
CPU 410 Process Automation/CPU 410 SMART
30 System Manual, 05/2017, A5E31622160-AC
Rules for H station assembly
The following rules have to be complied with for a fault-tolerant station, in addition to the
rules that generally apply to the arrangement of modules in the S7-400:
● The CPUs have to be inserted in the same slots.
● Redundantly used external CP443-5DX DP master interfaces or communication modules
must be inserted in the same slots in each case.
● External DP master interface modules for redundant DP master systems may only be
inserted in central controllers and not in expansion units.
● Redundantly used CPUs must be identical, which means they must have the same article
number, product version and firmware version. It is not the marking on the front side that
is decisive for the product version, but the revision of the "Hardware" component
("Module status" dialog mask) to be read using STEP 7.
● Redundantly used other modules must be identical, i.e. they must have the same article
number, product version and - if available - firmware version.
● Two CPU 410-5H must have system expansion cards with the same configuration size
and the same functional scope.
You can use SIMATIC S7 input/output modules with the CPU 410. The I/O modules can be
used in the following devices:
● Central controllers
● Expansion units
● Distributed via PROFIBUS DP
● Distributed via PROFINET IO
The function modules (FM) and communication modules (CP) that can be used with CPU
410 are listed in the appendix Function and communication modules that can be used in a
redundant configuration (Page 389).
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