Siemens Simatic S7-300 - Module Rack with Eight Signal Modules

Configuring
S7-300 Programmable Controller Hardware and Installation
4-8 A5E00105492-01
Example:
The figure below shows the arrangement of eight signal modules in an S7-300
assembly.
PS
CPU
SMs
12345678
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEMENS
Figure 4-4 Module rack with eight signal modules