Configuring The Et 200S With Grounded Reference Potential - Siemens SIMATIC ET 200S Manual

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.
L1
L2
L3
N
PE
¡
Rail
©
©
AC
DC
©
AC
AC
Figure 5-1

Configuring the ET 200S with grounded reference potential

ET 200S Distributed I/O System
EWA-4NEB 780602402-12
ET 200S
AC
1L+
DC
1M
Ground bus
Low-voltage distribution -- TN-S
system, for example (3 × 400 V)
FE: Functional earth for direct discharge
of interference to the mounting rail by
means of spring-loaded contact.
FG FG FG FG FG FG FG
FG
Shield contact for cable shields
©
Load circuit
400 VAC for motor starters
¢
24 VDC load circuit for electronic modules and
motor starters
¢
120 VAC/230 VAC load circuit for
AC modules
Wiring and Fitting
PE (AUX1)
5-5