Siemens SIMATIC RF600 Series System Manual page 374

Transponder
7.13 SIMATIC RF640T Gen 2
Ignitions of dust-air mixtures
Using the RF640T transponder with radiant power greater than 1280 mW ERP, requires
compliance with the reduced maximum ambient temperature (see diagram) for maintaining
the temperature value to a maximum of 135 °C.
Non-compliance with the permitted temperature ranges while using the transponder can
lead to ignitions of dust-air mixtures.
The respective temperature value and the maximum allowed ambient temperature in relation
to the radiated power of the antenna is shown in the diagram below:
Figure 7-33
374
WARNING
Temperature value
Ambient temperature
Temperature value and maximum permitted ambient temperature in relation to the
radiated power
System Manual, 10/2016, J31069-D0171-U001-A19-7618
SIMATIC RF600