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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
5-21
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The figure below shows a sample configuration of a CPU 31xC with isolated
modules. The connection is automatically generated for the CPU 31xC (1).
N
L1
L+
M
PS
S7-300 CPU
µP
L1
N
M
external
L+
U
internal
M
internal
Data
L1
N
DI
DO
PE
Ground bus
in cabinet
AC 230 V load
power supply
DC 24 V load power supply
1
Figure 5-9 Configuration with isolated modules
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