Centralized And Distributed Configuration - Siemens S5-135U/155U System Manual

Centralized and Distributed Configuration of a Programmable Controller
2.2

Centralized and Distributed Configuration

You can install a PLC in centralized or distributed configuration according to
your application.
IF ...
you wish to position the modules as closely as
possible to the CC and can accept longer cable runs to
the process,
you wish to position the I/O modules as closely as
possible to the process and can accept longer cable
runs to the CC,
With the centralized configuration, you can install the CC and EUs in the
same cabinet or in adjacent cabinets. Data transmission is parallel. Shown in
the following figure is a centralized configuration.
Figure 2-1
System Manual
C79000-G8576-C199-06
Load Power Supply
Centralized Configuration
THEN ...
choose the
centralized
configuration
choose the
distributed
configuration
EU
EU
CC
2-3