Use in Hazardous Environments
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Classification
Meeting CENELEC and IEC
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
9.3.3 Unit
Categories
A further subdivision for device groups is made into categories according to
their area of use (zones).
Tab. 9-2: Unit categories
Device group Unit category Equipment or Area of use
I M1 Fire-damp
protection
I M2 Fire-damp
protection
II
1G
Zone 0 equipment
(Explosive environment by gas, fumes or mist)
II
2G
Zone 1 equipment
(Explosive environment by gas, fumes or mist)
II
3G
Zone 2 equipment
(Explosive environment by gas, fumes or mist)
II
1D
Zone 20 equipment
(Explosive environment by dust)
II
2D
Zone 21 equipment
(Explosive environment by dust)
II
3D
Zone 22 equipment
(Explosive environment by dust)