Каталог Weidmuller: Electronics - Analogue Signal Conditioning

Labelling for ATEX approval of a signal converter
ATEX
Technical appendix/Glossary
II 3 G Ex nAnCnL IIC T4
II (1) D [Ex iaD]
II = Device group 2: devices for use in hazardous areas
(except for mines and above-ground mining facilities
that are exposed to flammable dusts or methane)
3 = Device category 3: the danger occurs rarely or only
for short periods. The requirement is for normal
security, suitable for use in zone 2.
G = Intended for the gas zone
Ex = Explosion protection
nA = Non-sparking equipment
nC = Enclosed facility (suitable protection)
nL = Equipment with limited power
IIC = Explosion groups: typical gas for C is hydrogen
T4 = Temperature class The max. permitted surface
temperature for T4 is 135 °C
II = Device group 2: devices for use in hazardous areas
(except for mines and above-ground mining facilities
that are exposed to flammable dusts or methane)
(1) = Device category (1): Equipment from category 1 can
be connected to this signal converter. The signal
converter must be operated in the safe zone or in
zone 2 (II 3 G …).
D = Designed for the dust zone.
[Ex iaD] = Explosion protection type: protected with intrinsic
safety. This signal converter, as accompanying
equipment, in intended to be used for the connection
of intrinsically safe circuits.
Zone 2 a zone for which during normal operations there is
at most only a short-term occurrence of dangerous
hazardous atmospheres (mixtures of air and flammables
gases, vapours or mists).
II (1) G [Ex ia] IIC/IIB/IIA
II = Device group 2: devices for use in hazardous areas
(except for mines and above-ground mining facilities
that are exposed to flammable dusts or methane)
(1) = Device category (1): Equipment from category 1 can
be connected to this signal converter. The signal
converter must be operated in the safe zone or in
zone 2 (II 3 G …).
G = Intended for the gas zone.
[Ex ia] = Explosion protection type: protected with intrinsic
safety. This signal converter, as accompanying
equipment, in intended to be used for the connection
of intrinsically safe circuits.
IIC/ = Explosion groups – typical gases: propane for A,
IIB/IIA Ethylene for B, and hydrogen for C.
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