Siemens SIMATIC ET 200X - Potentials Present in an ET 200 X-DESINA Configuration

Wiring
4-8
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
BM 143-DESINA FO or BM 143-DESINA RS485
Ground bus
Interface
Data
L1
L2
L3
N
PE
mP
Feed
DESINA
connection
AC
DC
A
B
DC 24 V-NS
M-NS
AC
DC
DC 24 V-S
M-S
Loop through
DESINA
connection
A
B
DC 24 V-NS
M-NS
DC 24 V-S
M-S
X1
X3
X5
X7
X2
X4
X6
X8
Figure 4-4 Potentials present in an ET 200X-DESINA configuration