Wiring
5-8
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
ET 200M with Load Power Supply from the PS 307
Figure 5-2 shows the ET 200M in the overall configuration (load power supply and
grounding concept) in a TN-S system.
In addition to supplying the IM 153-x, the PS 307 also supplies the load circuit for
the 24V DC modules.
Note: The illustration of the power supply connections does not reflect the actual
physical arrangement; this has been done to improve clarity.
IM 153-x
mP
S7-300 modules
SM/FM
N
M
L1
L +
M
PS
L1
L2
L3
N
24V DC load circuit for
DC modules
Ground bus in cabinet
Cabinet
Low-voltage distribution
For example, TN-S system (3 400 V)
PI
Rail
Figure 5-2 S7-300 modules operated from the PS 307
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