Use Of The Transponder In Hazardous Areas For Gases - Siemens SIMATIC RF640T Gen 2 Operating Instructions Manual

SIMATIC RF640T Gen 2
1.3 Planning the use
1.3.7

Use of the transponder in hazardous areas for gases

Temperature class delineation for gases
The temperature class of the transponder for hazardous areas depends on the ambient
temperature range:
Ambient temperature range
-25 °C to +85 °C
-25 °C to +60 °C
-25 °C to +40 °C
-25 °C to +30 °C
Ignitions of gas-air mixtures
When using the RF640T transponder, check to ensure that the temperature class is
observed in respect of 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.
12
WARNING
WARNING
Temperature class
T3
T4
T5
T6
Operating Instructions, 05/2009, J31069-D0197-U001-A2-7618
SIMATIC RF640T Gen 2