Siemens S7-300 - Configuration with Isolated Modules

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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
5-23
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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 .
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