54
Use in Hazardous Environments
WAGO I/O SYSTEM 750 XTR
750-606/040-000 Power Supply 24 VDC XTR for Ex i XTR Modules
Manual
Version 2.0.0
Figure 22: Text Detail
– Marking Example for Approved Ex i I/O Module According to NEC 505
Table 30: 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 23: Text Detail
– Marking Example for Approved Ex i I/O Module According to NEC 506
Table 31: 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)