Electrical Configuration - Siemens SIMATIC S7-1500/ET 200MP System Manual

Wiring

7.4 Electrical configuration

Note
In general, you need to connect the DC I/O modules of the S7-1500 automation system/
ET 200MP distributed I/O system to your own distribution (or batteries) via an upstream, local
power supply unit. If you connect the DC I/O modules directly to your own distribution, you
need to provide additional protective measures against overvoltages.
7.4 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.
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Automation system
System Manual, 01/2023, A5E03461182-AK