Configuration With Isolated Modules - Siemens S7-300 Installation Manual

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The figure below shows a sample configuration of a CPU 312 IFM with isolated
modules.
The connection to ground of the reference potential is established automatically
with the CPU 312 IFM  .
L1
L1
N
N
PE
Ground bus in cabinet
L +
M
external
DC 24 V load power supply
Figure 5-9 Configuration with isolated modules
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
PS S7-300 CPU
1
µ P
L +
M
DO
DI
AC 230 V
load power supply
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U
internal
Data
M
internal
L1
N
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