S7-400H setup options
3.4 I/O modules for S7–400H
S7-400H
36 System Manual, 03/2012, A5E00267695-11
3.4 I/O modules for S7–400H
I/O modules of the SIMATIC S7 series can be used for the S7-400H. The I/O modules can
be used in the following devices:
● Central units
● Expansion units
● Distributed via PROFIBUS DP
● Distributed via PROFINET
You will find the function modules (FMs) and communications modules (CPs) suitable for
use in the S7-400H in Appendix Function modules and communication processors supported
by the S7-40
0H (Page 457).
I/O design versions
The following I/O module design versions are available:
● Single-channel, one-sided configuration with standard availability
With the single-channel, one-sided design, single input/output modules are available. The
I/O modules are located in only one subsystem, and are only addressed by this
subsystem.
However, in redundant mode, both CPUs are interconnected via the redundant link and
thus execute the user program identically.
● Single-channel, switched configuration with enhanced availability
Switched single-channel distributed configurations contain only single I/O modules, but
they can be addressed by both subsystems.
● Redundant dual-channel configuration with maximum availability
A redundant dual-channel configuration contains two sets of the I/O modules which can
be addressed by both subsystems.
Additional information
For detailed information on using the I/O, refer to section Using I/Os in S7–400H (Page 169).
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