Brochure/Catalogue

ATEX
Labelling for ATEX approval of a signal converter
II 3 G Ex nAnCnL IIC T4
II = Device group 2: devices for use in hazardous
areas (except for mines and above-ground mining
facilities that are exposed to ammable 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
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 ammables 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 ammable 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.
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 ammable 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.
W
Technical appendix/Glossary
W.192729490000