Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 17)

CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
2-1
Operating and display elements
2
2.1 Operating and display elements: CPU 31xC
Operating and display elements of CPU 31xC
SF
BF
DC5V
RUN
STOP
RUN
STOP
MRES
FRCE
X1 X2
X11 X12
MMC
1 2 3
4
5
6
7
The figures show the following CPU elements
(1) Status and error displays
(2) Slot for the Micro Memory Card (MMC), incl. the ejector
(3) Connections of the integrated I/O.
(4) Power supply connection
(5) 2. Interface X2 (PtP or DP)
(6) 1. Interface X1 (MPI)
(7) Mode selector switch