S7-300 Modules Operated On A Grounded Incoming Supply - Siemens SIMATIC ET 200M Manual

ET 200M in the Overall Configuration
Figure 5-1 shows you the position of the ET 200M in the overall configuration (load
power supply and grounding concept) with power infeed from a TN-S system.
Note: The illustration of the power supply connections does not reflect the actual
physical arrangement; this has been done to improve clarity.
L1
L2
L3
N
PI


Rail

AC
AC
AC
DC
AC
DC
Figure 5-1

S7-300 modules operated on a grounded incoming supply

Distributed I/O Device ET 200M
EWA-4NEB780600602-06
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Low-voltage distribution
For example, TN-S system
(3 400 V)
Cabinet
PS IM 153-x SM/FM
mP
L1
L +
M
N
M
S7-300 modules
Ground bus in cabinet

Load circuit
24 to 230V AC for AC modules


5 to 60V DC load circuit for
non-isolated DC modules

5 to 60V DC load circuit for
isolated DC modules
Wiring
5-7