Siemens SIMATIC ET 200S - Overall configuration of the ET 200 S

Wiring and Fitting
5-5
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
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 s tarters
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 s hields
FG FG
FG
FG FG FG FG FG
Rail
FE: Functional earth for direct discharge
of interference to the mounting rail by
means of spring-loaded contact.
120 VAC/230 VAC load circuit for
AC modules
AC
AC
¢
©
Figure 5-1 Configuring the ET 200S with grounded reference potential