S7-300 Components; Example Of An S7-300 Configuration - Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual

S7-300 components

3.1

Example of an S7-300 configuration

The figure illustrates
the following
(1)
(2)
(3)
(4)
(5)
You use a programming device (PG) to program the S7­300 PLC. Use the PG cable to
interconnect the PG with the CPU.
To commission or program a CPU with PROFINET interface, you may also use an Ethernet
cable to interconnect the PG with the PROFINET connector of the CPU. Please note that
you need to adjust the Ethernet interface on your PG.
Several S7-300 CPUs communicate with one another and with other SIMATIC S7 PLCs via
the PROFIBUS cable. Several S7-300 are connected via the PROFIBUS bus cable.
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
5
the following S7-300 components
Power supply (PS) module
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
DC5 V
FRCE
RUN
ST OP
4
SF
BUSF
DC5 V
FRCE
RUN
ST OP
3
3
3-1