Siemens SIMATIC RF300 System Manual page 154

Readers
5.3 SIMATIC RF340R/RF350R
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.
Installation and operating conditions for hazardous areas:
NOTICE
Risk of explosion
Risk of explosion of dust-air mixtures or gas-air mixtures. Observe the following conditions
when installing and operating the device in a hazardous area in order to avoid a risk of
explosion and damage to the device:
• Making and breaking of circuits is permitted only in a de-energized state.
• The maximum surface temperature, corresponding to the marking, applies only for
• The device may only be operated in such a way that adequate protection against UV light is
• The device may not be operated in areas influenced by processes that generate high
• The device should only be cleaned with a damp cloth.
• The device must be set up and installed in such a way that it is mechanically protected.
• The grounding of the plug (8-pin) on the reader must be via its supply cable.
• The device may only be operated with accessories specified or supplied by the
• The device sockets incl. the metal parts of the connecting cable must have a shrink-on sleeve
• After removing the connections (antenna cable, signal/supply cable), the connectors must
154
WARNING
operation without a cover of dust.
ensured.
electrostatic charges.
manufacturer. All the points above also apply to the accessories (cables and connectors)
and to the antennas (exception: the housing of ANT 1 does not need to be installed with
impact protection).
pulled over them, in other words, all metal parts apart from the securing sockets of the
housing must be fully covered and be inaccessible.
be checked for contamination and, if necessary, cleaned before being inserted again.
Temperature value
T80 °C
System Manual, 02/2021, C79000-G8976-C345-09
SIMATIC RF300