Siemens S7-400PLC Dokumentacja Strona 31

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General specifications
1.2 Electromagnetic compatibility
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
31
System perturbation
The S7-400 AC Power Supply Modules fulfill the requirements of the following standards for
system perturbation:
Harmonic current: EN 61000-3-2
Voltage fluctuations and flicker: EN 61000-3-3
Additional measures
If you want to connect an S7-400 system to the public network, you must ensure Limit Value
Class B in accordance with EN 55022.
Suitable additional measures must be taken if you need to enhance the noise immunity of
the system as a result of high external noise levels.
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