Siemens CPU 312C

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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
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1. Use bus connectors to connect a stationary PG in the MPI subnet to the other
nodes of the MPI subnet.
The following picture illustrates two networked S7-300s which are connected to
one another using bus connectors.
PG
SF
BUSF
DC5V
FRCE
RUN
ST OP
SIEM EN S
CPU
PS
2
SM
SM
2
1
CPU
PS
Figure 9-2 Connecting a PG to multiple S7-300 PLCs
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 PROFIBUS bus cable
 Connector with inserted terminating resistor
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