WAGO-I/O-SYSTEM 750
Use in Hazardous Environments
85
750-484 2 AI 4-20 mA HART Ex i
Manual
V 1.2.0 HW-Version 04, SW-Version 03
Figure 44: Text Detail – Marking Example for Approved Ex i I/O Modules According to CEC 18
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Table 47: 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