Siemens Simatic S7-300 CPU 315-2-PN/DP - S7-300 components

S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
3-1
S7-300 components
3
3.1 Example of an S7-300 configuration
SF
BUSF
DC5 V
FRCE
RUN
ST OP
SF
BUSF
DC5 V
FRCE
RUN
ST OP
5
4
123
The figure illustrates
the following
the following S7-300 components
(1) Power supply (PS) module
(2) Central processing unit (CPU)
The example in the figure shows a CPU 31xC with integrated I/O.
(3) Signal module (SM)
(4) PROFIBUS bus cable
(5) Cable for connecting a programming device (PG)
You use a programming device (PG) to program the S7300 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.