WAGO Modular IO System INTERBUS S Servisní příručka Strana 204

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200 Use in Hazardous Environments
Classification meeting CENELEC and IEC
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Hydrogen being commonly encountered in chemical plants, frequently the
explosion group IIC is requested for maximum safety.
9.3.3 Unit categories
Moreover, the areas of use (zones) and the conditions of use (explosion
groups) are subdivided into categories for the electrical operating means:
Unit
categories
Explosion
group
Area of use
M1 I Fire-damp protection
M2 I Fire-damp protection
1G II Zone 0 Explosive environment by gas, fumes or mist
2G II Zone 1 Explosive environment by gas, fumes or mist
3G II Zone 2 Explosive environment by gas, fumes or mist
1D II Zone 20 Explosive environment by dust
2D II Zone 21 Explosive environment by dust
3D II Zone 22 Explosive environment by dust
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