Electrical Configuration - Siemens SIMATIC S7-1500 System Manual

Wiring

5.3 Electrical configuration

5.3 Electrical configuration
Galvanic isolation
With the S7-1500 automation system/ET 200MP distributed I/O system, there is galvanic
isolation between:
● The primary side of the system power supply (PS) and all other circuit components
● The (PROFIBUS/PROFINET) communication interfaces of the CPU/interface module and
all other circuit components
● The load circuits/process electronics and all other circuit parts of the S7-1500/ET 200MP
components
High-frequency interference currents are conducted and electrostatic charges are avoided
through integrated RC combinations or integrated capacitors.
S7-1500 potential relationships
The following figure shows a simplified representation of the potential relationships of the
S7-1500 automation system.
Figure 5-2 Potential relationships for S7-1500 using CPU 1516-3 PN/DP as an example
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Automation system
System Manual, 12/2014, A5E03461182-AC