Siemens SIMATIC RS 485 Manual page 31

Sinusoidal disturbance
The table below shows the EMC compatibility of S7-300 modules in areas subject to
sinusoidal disturbance.
● HF radiation
HF radiation according to IEC 61000-4-3
Electromagnetic HF field, amplitude-modulated
80 MHz to 1,000 MHz; 1.4 GHz to 2 GHz
10 V/m
80% AM (1 kHz)
● HF coupling
HF coupling according to IEC 61000-4-6
0.15 MHz to 80 MHz
10 V
80% AM (1 kHz)
150 Ω source impedance
Emission of radio interference
Electromagnetic interference according to EN 55016: Limit Value Class A (measured at a
distance of 10 m).
Frequency
30 MHz to 230 MHz
230 MHz to 1000 MHz
Noise emission via AC mains to EN 55016: Limit value class A, Group 1.
Frequency
From 0.15 to 0.5 MHz
0.5 MHz to 5 MHz
5 MHz to 30 MHz
RS 485 Repeater
Manual, 02/2011, A5E03382072-01
unmodulated
rms
2.0 GHz to 2.7 GHz
1 V/m
Noise emission
< 40 dB (µV/m)Q
< 47 dB (µV/m)Q
Noise emission
< 79 dB (µV/m)Q
< 66 dB (µV/m)M
< 73 dB (µV/m)Q
< 60 dB (µV/m)M
< 73 dB (µV/m)Q
< 60 dB (µV/m)M
Technical data
6.1 General technical data
Corresponds with
degree of severity
3, 2, 1
Corresponds with
degree of severity
3
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