Use in Hazardous Environments
• 21
Marking Configuration Examples
WAGO-I/O-SYSTEM 750
I/O Modules
Table 2: Description of marking example for Ex i and IEC Ex i approved I/O modules according to
CENELEC and IEC
Inscription text
Description
TÜV 07 ATEX 554086 X
TUN 09.0001X
Approving authority or
certificate numbers
Dust
II
Device group: All except mining
3(1)D
Device category: Zone 22 device (Zone 20 subunit)
Ex
Explosion protection mark
tD
Protection by enclosure
[iaD]
Approved in accordance with "Dust intrinsic safety"
standard
A22
Surface temperature determined according to Proce-
dure A, use in Zone 22
IP6X
Dust-tight (totally protected against dust)
T 135°C
Max. surface temp. of the enclosure (no dust bin)
Mining
I
Device group: Mining
(M2)
Device category: High degree of safety
[Ex ia]
Explosion protection: Mark with category of type of
protection intrinsic safety: Even safe when two er-
rors occur
I
Device group: Mining
Gases
II
Device group: All except mining
3(1)G
Device category: Zone 2 device (Zone 0 subunit)
Ex
Explosion protection mark
nA
Type of protection: Non-sparking operating equip-
ment
[ia]
Category of type of protection intrinsic safety: Even
safe when two errors occur
IIC Explosion
Group
T4
Temperature class: Max. surface temperature 135°C
