Siemens S7-300 - Connecting a PG to Multiple S7 Devices

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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
9-9
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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 figure shows you two S7-300 connected by means of PROFIBUS
bus cables. The bus cable connectors have integrated terminating resistors. These
must be energized on the CPUs for the outgoing bus cable connectors.
PG
SF
BUSF
DC5V
FRCE
RUN
ST OP
SIEM EN S
CPU
PS
2
SM
SM
2
1
CPU
PS
Figure 9-4 Connecting a PG to multiple S7 devices
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 PROFIBUS bus cable
 Cable connector with energized terminating resistors