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

Figure 5-2 shows the overall setup of the ET 200S distributed I/O system (load
power supply and grounding concept) with the ET 200S Power Supply and an
incoming supply from a TN-S system.
L1
L2
L3
N
PE


Rail
Alternative*

AC
DC

AC
AC
* Connection to N:
Connection to L3:
Figure 5-2 Operating the ET 200S with grounded reference potential (with the ET 200S Power Supply)
ET 200S Distributed I/O System
EWA-4NEB780602402-09
ET 200S
SIMATIC
ET 200S
Power Supply
1L+
L1
N 1M
L3
PE
Ground bus
230 V power supply
400 V power supply
Low-voltage distribution – TN-S
system, for example (3
FG: Functional ground to divert noise
directly to the DIN rail by means of a
spring contact
FG FG FG FG FG FG FG
FG

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
400 V)
PE
(AUX1)
Shield contact for cable
shields
5-7