Wiring and Fitting
5-6
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
5.3 Electrical Design of the ET 200S
Isolation Between ...
The load circuits/process and all other circuit components of the ET 200S
The PROFIBUS-DP interface in the interface module and all other circuit
components
The following figure shows the potentials of the ET 200S. Only the most important
components are shown.
1 L+ 1M
IM 151
24 VDC M 24 VDC M
Bus interface
Isolation
Electronics,
backplane bus
Terminating module
Process
electronic
components
Process
electronic
components
Process
electronic
components
ET 200S backplane bus
Isolation Isolation Isolation Isolation
PE
Bus interface Bus interface Bus interface Bus interface
Rail
PE
Potential logic circuitry
Potential DP interface
Potential I/O
Isola-
tion
DP
interface
Power
module
Electronic
module
Electronic
module
Power
module
Electronic
module
Figure 5-2 Potentials of the ET 200S
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