Modules In An S7-300 - Siemens CPU 313C Hardware And Installation Manual

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An S7-300 consists of several modules. The following diagram illustrates a
possible configuration:
Figure 4-1 Modules in an S7-300
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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
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Power supply (PS)
Central processing unit (CPU)
The example in the figure shows a CPU 31xC with integrated I/O.
Signal module (SM)
PROFIBUS bus cable
Cable for connecting a programming device (PG)
1 2
SF
BUSF
DC5V
FRCE
RUN
STOP
4
SF
BUSF
DC5V
FRCE
RUN
STOP

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