Siemens SIMATIC RF685R - Page 23

Safety Information
2.3 Safety distance to transmitter antenna
SIMATIC RF600
System Manual, 11/2018, J31069-D0171-U001-A21-7618
23
The horizontal line at 41.25 V/m marks the "safety limit value".
Distance to transmitter antenna [m]
Feld strength [V/m]
% of limit value
1
10.9
26
5 2.2 5.3
If the transmit power is set lower than the highest permitted value (4 W EIRP), the "safety
distance" reduces correspondingly.
The values for this are as follows:
Radiated power EIRP [W]
Safety distance to transmitter antenna [m]
4.0
0.26
<2.5 >0.20
Generally a safety distance of at least 0.2 m should be maintained.
Note
Reduced maximum radiated power with RF600 readers
The SIMATIC RF615R (F
CC) reader has a maximum transmit power of 400 mW. The
radiated power depends on the antenna cable and
the antenna used, but must not exceed
2
W ERP.
The SIMATIC RF650R (FCC) reader has a maximum transmit power of 1
W. The radiated
power therefore depends
on the antenna cable and the antenna used, but must not exceed
4
W EIRP.
The SIMATIC RF680R (FCC) reader has a maximum transmit power of 2
W. The radiated
power therefore depends on the antenna cable and the antenna used, but must not exceed
4
W EIRP.
Th
e SIMATIC RF685R (CC) reader has a maximum transmit power of 2 W. This means that
the safety distance is at least 0.12 m.
When using Siemens products and with suitable configuration via the WBM, the high limits
cannot be exceeded.