3-6
ET 200L Distributed I/O Device
EWA-4NEB 780600902-05
Figure 3-1 shows the location of the ET 200L in the overall system (load cur-
rent voltage supply and grounding philosophy) for supply from a TN-S sys-
tem.
Remark: The arrangement of the power supply connections shown in the fig-
ure does not correspond to the actual arrangement but was chosen for the
sake of clarity.
Ground bus in cabinet
N
L1
L +
M
PS
ET 200L
Electronics
L1
L2
L3
N
Load circuit
24 to 230 VAC for AC modules
5 to 60 VDC load circuit for non-iso-
lated DC modules
5 to 60 VDC load circuit for floating DC
modules
Cabinet
AC
AC
AC
DC
AC
DC
Low-voltage distribution system
for example, TN-S system
(3 400 V)
PE
Rail
Figure 3-1 Operating the ET 200L from a Grounded Supply
ET 200L in Overall
Installation
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