Minimum Distance To Antenna In Accordance With Fcc (Usa) - Siemens SIMATIC RF600 System Manual

2.3.3

Minimum distance to antenna in accordance with FCC (USA)

Minimum distance to antenna in accordance with FCC (USA)
For the maximum permisisble transmission power in accordance with FCC (4W EIRP), the
"safety distance" d = 0.26 m. This means that personnel should not remain closer than 26cm
to the transmitter antenna for extended periods (more than several hours without
interruption). Remaining within the vicinity of the antenna for brief period, even repeated
periods (at a distance < 0.26 m) is harmless to health according to current knowledge.
The horizontal line at 41.25 V/m marks the "safety limit value".
Distance to transmitter antenna [m]
If the transmitter power is set lower than the highest permissible value (4 watts ERP), the
"safety distance" reduces correspondingly.
The values for this are as follows:
SIMATIC RF600
System Manual, 10/2009, J31069-D0171-U001-A8-7618
120
100
80
60
40
20
0
0.1 0.2 0.3
1
5
Transmitter power ERP [W]
2.0
0.5
2.3 Safety distance to transmitter antenna
0.4 0.5 0.6
Feld strength [V/m]
10,9
2,2
Safety distance to transmitter antenna [m]
Safety Information
0.7 0.8 0.9
% of limit value
26
5,3
0.185
0.13
1
19