Wiring
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
6-7
230V
DC 24 V
L1
N
L+
M
M
L+
I
SIEMENS
M
L+
strain-relief assembly
230 V/120 V
CPUs 31xC:
power supply connector
of CPU 31xC (removable)
connecting cables for the
CPU´s power supply
Other CPU´s besides
CPU 312 IFM:
strain-relief assembly
power connector
230 V/120 V
0.5 to 0.8 Nm
CPU 312 IFM: wire L+ and M via the front connector of CPU 312 IFM
Figure 6-3 Wiring the power supply module and the CPU
Note
The PS 307 power supply module is equipped with two additional DC 24 V
connections (L+ and M) for the supply of I/O modules.
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