Siemens Simatic RF300 System Manual page 148

Readers
5.3 SIMATIC RF310R - 2nd generation
5.3.11.1 Using the reader in hazardous area for gases
The temperature class of the reader for hazardous areas depends on the ambient
temperature range:
Ambient temperature range
-25 ℃ ... +70 ℃
Ignitions of gas-air mixtures
When using the reader, 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 reader can lead to
ignitions of gas-air mixtures.
5.3.11.2 Using the reader in hazardous area for dust
The equipment is suitable for dusts whose ignition temperatures for a dust layer of 5 mm are
higher than 80 °C (smoldering temperature).
Ambient temperature range
-25 °C < Ta < +70 °C
Ignitions of dust-air mixtures
When using the reader, 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 range while using the reader can lead to ignitions of dust-air mixtures.
148
WARNING
WARNING
Temperature class
T4
Temperature value
T80 °C
System Manual, 07/2017, C79000-G8976-C345-07
SIMATIC RF300