40
Use in Hazardous Environments
WAGO-I/O-SYSTEM 750
750-531 4DO 24V DC 0.5A/ 2-conductor
Manual
Version 1.3.0
Table 18: Description of Marking Example for Approved I/O Modules According to ATEX and
IECEx
Printing on Text
Description
TÜV 07 ATEX 554086 X
IECEx TUN 09.0001 X
Approving authority and certificate numbers
Dust
II
Equipment group: All except mining
3D
Category 3 (Zone 22)
Ex
Explosion protection mark
tc Dc
Type of protection and equipment protection
level (EPL):protection by enclosure
IIIC
Explosion group of dust
T 135°C
Max. surface temperature of the enclosure
(without a dust layer)
Mining
I
Equipment group: Mining
M2
Category: High level of protection
Ex
Explosion protection mark
d Mb
Type of protection and equipment protection
level (EPL): Flameproof enclosure
I
Explosion group for electrical equipment for
mines susceptible to firedamp
Gases
II
Equipment group: All except mining
3G
Category 3 (Zone 2)
Ex
Explosion protection mark
nA Gc
Type of protection and equipment protection
level (EPL): Non-sparking equipment
nC Gc
Type of protection and equipment protection
level (EPL): Sparking apparatus with protected
contacts. A device which is so constructed that
the external atmosphere cannot gain access to the
interior
IIC
Explosion group of gas and vapours
T4
Temperature class: Max. surface temperature
135°C
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