Operating instructions

Safety instructions and approvals
2.4 Electromagnetic compatibility
MP 377, MP 377 PRO (WinCC flexible)
Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
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Sinusoidal interference
The following table shows the EMC behavior of the modules with respect to sinusoidal
interference. This requires the HMI device to meet the specifications and directives for
electrical installation.
Sinusoidal interference Test values Degree of
severity
HF radiation (in
electromagnetic fields) in
accordance with
IEC 61000-4-3
• 80% amplitude modulation at 1 kHz
with 10 V/m in the range of 80 MHz to 1 GHz
with 3 V/m in the range 1.4 GHz to 2 GHz
with 1 V/m the range 2 GHz to 2.7 GHz
• 10 V/m with 50% pulse modulation at 900 MHz
10 V/m with 50% pulse modulation at 1.89 GHz
3
RF interference current on
cables and cable shielding
conforming to IEC 61000-4-6
Test voltage 10 V, with 80% amplitude modulation
of 1 kHz in the 9 MHz to 80 MHz range
3
Emission of radio interference
The following table shows the unwanted emissions from electromagnetic fields in
accordance with EN 55011, Limit Value Class A, Group 1, measured at a distance of 10 m.
From 30 to 230 MHz < 40 dB (μV/m) quasi-peak
From 230 to 1000 MHz < 47 dB (μV/m) quasi-peak
Additional measures
If you want to connect an HMI device to the public power supply system, you must ensure
Limit Value Class B in accordance with EN 55022.