- 51 -
ADDENDUM FOR "EX SAFETY" ASPECTS (EUROPE)
According to ATEX Directive (European Directive 94/9/EC of 23 March 1994) and relative Standards which can assure compliance
with Essential Safety Requirements, i.e., EN 50014 (General requirements) EN 50021 (Specification for electrical apparatus
with type of protection "n") EN 50281 (Apparatus for use with combustible dusts), the pressure transmitters of the 2600T
SERIES have been certified for the following group, categories, media of dangerous atmosphere, temperature classes, types
of protection. Examples of application are also shown below by simple sketches.
d) Certificate ATEX II 3 GD T50
°
C, EEx nL IIC T6 (-40
°
C
≤
Ta
≤
+40
°
C)
respectively, GD T95
°
C, EEx nL IIC T4 (-40
°
C
≤
Ta
≤
+85
°
C)
ZELM "Conformity Statement" number ZELM 02 ATEX 3088
(Note: It is the technical support for the ABB Declaration of Conformity)
The meaning of ATEX code is as follows:
II :
Group for surface areas (not mines)
3 :
Category
G :
Gas (dangerous media)
D :
Dust (dangerous media)
T50
°
C:
Maximum surface temperature of the transmitter enclosure with a Ta (ambient temperature)
+40
°
C for Dust (not Gas) with a dust layer up to 50 mm depth.
T95
°
C:
As before for Dust for a Ta +85
°
C
The other marking refers to the protection type used according to the standards:
EEx nL :
Type of protection "n" with "energy limitation" technique
IIC :
Gas group
T6 :
Temperature class of the transmitter (which corresponds to 85
°
C max)
with a Ta (ambient temperature) +40
°
C
T4 :
Temperature class of the transmitter (which corresponds to 135
°
C max)
with a Ta (ambient temperature) +85
°
C
Note: when installed this transmitter must be supplied by a voltage limiting device which will prevent the rated voltage
of 42 V d.c. being exceeded.
About the applications, this transmitter can be used in “Zone 2” (Gas) and "Zone 22" (Dust) classified areas (unlikely/infrequent
hazard) as it is shown on the following sketch:
APPLICATION FOR PRESSURE TRANSMITTER EEx nL CATEGORY 3GD
Zone "2"
2600T Tx
category 3G
EEx nL
Note: the transmitter must be connected to a supply
with 42 V d.c. max output voltage as above indicated.
The Ii of the transmitter is less than 25 mA.
Zone "22"
2600T Tx
category 3D
IP6x
(EEx nL)
Application with Gas
Application with Dust
+
+
Note: the protection is mainly assured by the "IP degree"
associated to the low power from the supply.
Summary of Contents for Industrial IT enabled 2600T Series
Page 53: ... 53 ...
Page 54: ... 54 ...
