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

1.3.8

Use of the transponder in hazardous areas for dusts

The equipment is suitable for dusts whose ignition temperatures for a dust layer of 5 mm are
higher than 210 °C (smoldering temperature). With the ignition temperature specified
according to IEC 61241-0 and IEC 61241-11 according to the type of ignition protection iD,
the smoldering temperature of the dust layer is referenced in this case.
Temperature class delineation for dusts
Ambient temperature range
-25 °C < Ta < +85 °C
Ignitions of dust-air mixtures
When using the RF640T transponder, check to ensure that the temperature values are
complied with in connection with the requirements of the application area.
Non-compliance with the permitted temperature ranges while using the transponder can
lead to ignitions of dust-air mixtures.
SIMATIC RF640T Gen 2
Operating Instructions, 05/2009, J31069-D0197-U001-A2-7618
WARNING
SIMATIC RF640T Gen 2
Temperature value
T140 °C
1.3 Planning the use
13