36
Use in Hazardous Environments
WAGO-I/O-SYSTEM 750
750-492 2AI 4-20mA Differential Input
Manual
Version 1.1.0
Table 15: Description of Marking Example for Approved Ex i I/O Modules According to ATEX and
IECEx
Gases
II
Equipment group: All except mining
3(1)G
Category 3 (Zone 2) equipment containing a safety
device for a category 1 (Zone 0) equipment
3(2)G
Category 3 (Zone 2) equipment containing a safety
device for a category 2 (Zone 1) equipment
Ex
Explosion protection mark
nA Gc
Type of protection and equipment protection level
(EPL): Non-sparking equipment
[ia Ga]
Type of protection and equipment protection level
(EPL): associated apparatus with intrinsic safety
circuits for use in Zone 0
[ia Gb]
Type of protection and equipment protection level
(EPL): associated apparatus with intrinsic safety
circuits for use in Zone 1
IIC
Explosion group of gas and vapours
T4
Temperature class: Max. surface temperature 135°C
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