WAGO-I/O-SYSTEM 750
Use in Hazardous Environments 55
750-439 8DI NAMUR Ex i
Manual
Version 1.3.0, valid from HW Version 03, SW Version 03
Figure 27: Text Detail – Marking Example for Approved Ex i I/O Modules According to CEC 18
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Table 37: Description of Marking Example for Approved Ex i I/O Modules According to CEC 18
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Marking
Description
Dust
Ex
Explosion protection mark
nA
Type of protection
[ia IIIC]
Type of protection and equipment protection
level (EPL): Associated apparatus with intrinsic
safety circuits for use in Zone 20
IIC
Group
T4
Temperature class
Gc
Equipment protection level (EPL)
X
Symbol used to denote specific conditions of use
Gases
Ex
Explosion protection mark
nA
Type of protection
[ia Ga]
Type of protection and equipment protection
level (EPL): Associated apparatus with intrinsic
safety circuits for use in Zone 0
IIC
Group
T4
Temperature class
Gc
Equipment protection level (EPL)
X
Symbol used to denote specific conditions of use