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7 7 .10.3.5
Use of the transponder in hazardous areas for gases
Note
T T ransponder labeling
The labeling of the front of the transponder shown above is an example and can vary
between batches produced at different times.
This does not affect the hazardous area marking.
Temperature class grading for gases
The temperature class of the transponder for hazardous atmospheres (gases) depends on
the ambient temperature and the radiated power of an antenna in the 865 - 868 MHz
frequency band within the hazardous area.
Ignitions of gas- - air mixtures
When using the RF640T transponder, check that the temperature class is adhered to in
keeping with the requirements of the area of application.
Non-compliance with the permitted temperature ranges while using the transponder can
lead to ignitions of gas-air mixtures.
Ignitions of gas- - air mixtures
The maximum transmitting power of the transmitter used to operate the transponder must
not exceed 2 W.
Non-compliance with the permissible transmitting power can lead to ignitions of gas-air
mixtures.
SIMATIC RF600
System Manual, 06/2019, J31069-D0171-U001-A22-7618
WARNING
WARNING
Transponder
7.10 SIMATIC RF640T
425
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