Unit Categories - WAGO 750 Series Manual

11.3.3 Unit Categories

Moreover, the areas of use (zones) and the conditions of use (explosion
groups) are subdivided into categories for the electrical operating means:
Tab. 11-2: Unit categories
Unit
category
M1
M2
1G
2G
3G
1D
2D
3D
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
Classification Meeting CENELEC and IEC
Explosion Area of use
group
I Fire-damp protection
I Fire-damp protection
II Zone 0 Explosive environment by gas, fumes or mist
II Zone 1 Explosive environment by gas, fumes or mist
II Zone 2 Explosive environment by gas, fumes or mist
II Zone 20 Explosive environment by dust
II Zone 21 Explosive environment by dust
II Zone 22 Explosive environment by dust
Use in Hazardous Environments • 221