Siemens ET 200S Manual page 102

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