General
7
ATEX Markings (if applicable)
When the equipment is suitable for use in potentially explosive atmospheres (ATEX) the type plate will
feature an Ex Marking specifying the specific device category and other criteria that the equipment
satisfies.
•
Code example:
II 1/2D c T120°C Da/Db
•
Explanation:
II
explosion group (I is underground mining, II is other)
1/2D
Equipment Category (Ignition protection level: 1 = very high, 2 = high, 3 = normal)
1D inside device / 2D outside device
c
Type of Ex protection
c = constructional safety
t = protection by enclosure
h = non-electrical equipment (protection method not specified further)
T120°C
Maximum surface temperature
Da/Db
Equipment Protection Level (EPL).
EPL
Da
Db
Dc
Suited for ATEX zone(s)
20 (21, & 22)
21 (22)
22
Da inside device / Db outside device
Ta
Ambient temperature range; only displayed when the range deviates from the standard
temperature range for ATEX of -20 … +40°C
If the device is externally certified, then the ATEX certificate number is added to the type plate. Next to
the CE mark the identification number of the Notified Body that certified our ATEX quality assurance
system is displayed.
In case the equipment contains no ‘own ignition sources’ and therefore is not under scope of the ATEX
Directive, then the equipment will not get an EX marking and wil be supplied with a Statement of
Exclusion, in which this is stated and also the EX zones are listed in which it can be safely used.
Equipment category
1D
2D
3D
Suited for ATEX zone(s)
20 (21, & 22)
21 (22)
22
