Siemens SIMATIC ET 200S - Electrical design of the ET 200 S

Wiring and Fitting
5-6
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
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 IM151-1 interface module and all other
circuit components
• The PROFIBUS DP interface in the IM151-3 PN interface module and all other
circuit components
The following figure shows the potentials of the ET 200S. Only the most important
components are shown.
1L+ 1MIM 151 24 VDC M 24 VDC M
Bus interface
Isolation
Electronics,
backplane bus
Terminating module
Process
electronic
component
s
Process
electronic
component
s
Process
electronic
component
s
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
Isolation
DP
interface
Power
module
Electronic
module
Electronic
module
Power
module
Electronic
module
Figure 5-2 Potentials of the ET 200S with IM151-1