I/O For The S7-400H - Siemens SIMATIC S7-400H Manual

2.2

I/O for the S7-400H

For the S7-400H you can use virtually any of the input/output modules featured in
the SIMATIC S7 system range. The I/O can be used in
central racks
expansion units
distributed over PROFIBUS DP.
The function modules (FMs) and communication processors (CPs) that can be
used in the S7-400H will be found in Appendix E.
I/O configuration versions
In addition to the power supplies and central processing units that are always used
as redundant modules, there are the following configuration versions for the
input/output modules:
Single-channel, one-sided configuration with normal availability
With the single-channel, one-sided configuration single input/output modules
are present (single-channel). The input/output modules are located in just one
of the subsystems and are only addressed by that subsystem.
Single-channel, switched configuration with enhanced availability
With the single-channel switched (distributed) configuration single input/output
modules are present (single-channel) but can be addressed by either
subsystem.
Further information
You will find detailed information on the usage of I/O in Chapter 6.
S7-400H Programmable Controller Fault-Tolerant Systems
A5E00068197-04
S7-400H Installation Options
2-5