Siemens Simatic S7-400 - S7-400 - Configuration Variants

SIMATIC S7 - an Overview
1-8
Automation System S7-400 Configuration and Use
A5E0044271 1-02
1.4 S7-400 - Configuration Variants
Configuration Variants for various Automation Task
There is a suitable solution for every automation task. This means to cover a large
range of demands for quantity and connection with the process by choosing the
appropriate configuration variant.
Table 1-2 provides examples of configuration variants of the S7-400.
Table 1-2 Configuration variants of the S7-400
Selection criteria
Medium-sized
plant
Large plant Large plant with distributed signal
monitoring via PROFIBUS DP
Digital
input/outputs*
approx. 2000 approx. 11000 more than 11000
Analog
input/outputs*
approx. 1000 approx. 5500 more than 5500
Number of
modules
maximum 72 maximum 396 more than 396
Distance
(cable length)
3m
between first and
last rack
up to 605 m
between first and
last rack
up to 50 m
between 2 devices
up to 1000 m
with RS485
repeater
up to 23800 m
between 2 devices
The solution for
your task
Configuration with
4 racks and local
link
Configuration with
22 racks and
remote link
Communication via
MPI interface
Communication via
PROFIBUS DP
* The number only applies when only this type of module is used. This table is only intended to give you an
overview of the information. Mixed combinations are also possible, of course. The decision depends on
the type pf processes to be controlled and the local, on-site conditions.