Download Siemens Simatic S7-300 Specifications

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The following illustration shows the operator control and display elements of a CPU
31xC.
SIM
AT
SF
IC
6 4 k Byte
MMC
M ic
M e ro
m
C a o ry
rd
CPU 31xC
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1
1
2
1
3
RUN
STOP
RUN
STOP
MRES
1
4
1
5
1
6
1
8
X2
X1
1
7
X11
X12
Figure 3-1 Elements and architecture of a CPU 31xC
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Slot for the Micro Memory Card (MMC)
Status and error displays
MMC ejector
Mode selector switch
Interface 2 X2 (PtP or DP)
Interface 1 X1 (MPI)
Power supply connection
Connection for the integrated inputs and outputs.
S7-300 Automation System CPU Specifications: CPU 31xC and CPU 31x
A5E00105475-03
3-1