WAGO I/O SYSTEM 750 XTR
Use in Hazardous Environments
49
750-610/040-000 Power Supply 24 VDC Fuse Diagn XTR
Manual
Version 2.0.0
Figure 21: Text Detail
– Marking Example for Approved Ex i I/O Module According to NEC 505
Table 25: Description of Marking Example for Approved Ex i I/O Module According to NEC 505
Marking
Description
CI I,
Explosion protection group
Zn 2
Area of application
AEx
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 20
IIC
Group
T4
Temperature class
Gc
Equipment protection level (EPL)
Figure 22: Text Detail
– Marking Example for Approved Ex i I/O Module According to NEC 506
Table 26: Description of Marking Example for Approved Ex i I/O Modules According to NEC 506
Marking
Description
CI I,
Explosion protection group
Zn 2
Area of application
AEx
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)