Transponder
7.12 SIMATIC RF680T
SIMATIC RF600
448
System Manual, 06/2019, J31069-D0171-U001-A22-7618
7.12.3.6
Use of the transponder in the hazardous area 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). The ignition temperature specified here
according to IEC 60079-0:2011 for ignition protection type ib in this case references the
smoldering temperature of a layer of combustible flyings (ib IIIA) or alternatively non-
conductive dusts (ib IIIB).
Temperature class delineation for dusts
WARNING
Ignitions of dust-air mixtures
When using the RF680T transponder, check to make sure that the temperature values are
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 dust-
air mixtures.
Temperature class assignment for dusts 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
Temperature value
-25 °C
≤
Ta
≤
+125
℃
T135 °C
Temperature class assignment for dusts and a radiated power less than 500 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 500 mW, the temperature class assignment is as follows:
Ambient temperature range
Temperature value
-25 °C
≤
Ta
≤
+108
℃
T135 °C
Temperature class assignment for dusts and a radiated power less than 1000 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 1000 mW, the temperature class assignment is as follows:
Ambient temperature range
Temperature value
-25 °C
≤
Ta
≤
+86
℃
T135 °C
