84 Use in Hazardous Environments
WAGO I/O System 750 XTR
750-471/040-000 4AI U/I Diff Galv XTR
Manual
Version 1.0.2
Table 51: Description of the Marking Example of an Approved I/O Module Ex i
per ATEX and IECEx
Marking Text
Description
TUEV 12 ATEX 106032 X
IECEx TUN 12
0039 X
Approving authority or
certificate numbers
Dust
II
Device group: All except mining
3 (1) D
Device category 3 (Zone 22) that contain safety
devices for Category 1 (Zone 20) devices
Ex
Explosion protection mark
tc
Protection type: Protection by enclosure
[ia Da]
Protection type and equipment protection level
(EPL): Associated equipment with intrinsically safe
circuits for Zone 20
IIIC
Dust group: Explosive dust atmosphere
T135°C
Max. surface temperature of the enclosure
(no dust bin)
Dc
Level of equipment protection (EPL)
Mining
I
Device group: Mining
M2 (M1)
Device category: High level of safety with circuits
that offer a very high level of safety
Ex
Explosion protection mark
d
Protection type: Pressure-tight encapsulation
[ia Ma]
Protection type and equipment protection level
(EPL): Associated equipment with intrinsically safe
circuits
I
Electrical devices in potentially explosive mines
Mb
Level of equipment protection (EPL)
Gases
II
Device group: All except mining
3 (1) G
Device category 3 (Zone 2) that contain safety
devices for Category 1 (Zone 0) devices
Ex
Explosion protection mark
ec
Protection type: Increased safety
[ia Ga]
Protection type and equipment protection level
(EPL): Associated equipment with intrinsically safe
circuits for Zone 0
IIC
Gas group: Explosive gas atmosphere
T4
Temperature class: Max. surface temperature 135
°C
Gc
Level of equipment protection (EPL)
