Siemens SIMATIC ET 200S Manual page 319

Distributed i/o system
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Block diagram
P1
P2
Figure 12-6
ET 200S Distributed I/O System
EWA-4NEB780602402-09
1M
L+
Block diagram of the 2DI 24 VDC High Feature
Digital Electronic Modules
Input elec-
tronics
Input elec-
tronics
Short-circuit
protection
Reverse pola-
rity protection
1
5
3
7
2
6
12-23

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