Wiring and Fitting
5-5
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Overall Configuration of the ET 200S
Figure 5-1 shows the overall configuration of the ET 200S distributed I/O system
(load voltage supply and grounding concept) with supply from a TN-S system.
Ground bus
L1
L2
L3
N
Load circuit
400 VAC for motor starters
24 VDC load circuit for electronic modules and
motor starters
AC
DC
Low-voltage distribution – TN-S
system, for example (3 400 V)
PE
AC
DC
1L+
1M
ET 200S
PE (AUX1)
Shield contact for cable shields
FG FG
FG
FG FG FG FG FG
Rail
FG: Functional ground to divert noise di-
rectly to the DIN rail by means of a spring
contact
120 VAC/230 VAC load circuit for AC modules
AC
AC
Figure 5-1 Configuring the ET 200S with Grounded Reference Potential
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