Siemens SIMATIC RF610T ATEX System Manual page 445

N N ote
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.
T T emperature class delineation 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 RF680T transponder, check to make sure 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.
Temperature class assignment for gases and a radiated power less than 100 mW ERP
If the radiated power of an antenna radiating into the hazardous area or located in the
hazardous area and operating in the 865 - 868 MHz frequency band cannot exceed the
value 100 mW, the temperature class assignment is as follows:
Ambient temperature range
-25 °C ... +200 °C
-25 °C ... +190 °C
-25 °C ... +125 °C
-25 °C ... +90 °C
-25 °C ... +75 °C
SIMATIC RF600
System Manual, 06/2019, J31069-D0171-U001-A22-7618
WARNING
WARNING
Temperature class
T2
T3
T4
T5
T6
Transponder
7.12 SIMATIC RF680T
445