ABB 266D Series Short Form Instruction Manual page 17

... "EX SAFETY" ASPECTS AND "IP" PROTECTION (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 60079-0 (General requirements) EN 60079-15 (Specification for electrical apparatus with
type of protection "n") EN 61241-0 (General requirements), 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 G Ex nL IIC T4÷T6 (-50°C ≤ Ta ≤+85°C) ÷ (-50°C ≤ Ta ≤+40°C) and II 3D Ex tD A22 IP67 T85°C
Entities: Ui = 42V dc Ii < 25 mA Ci < 13 nF Li < 0,22 mH
FM Approvals "Conformity Statement" number FM09ATEX0025X respectively FM09ATEX0070X
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)
+40°C for Dust (not Gas) with a dust layer up to 50 mm depth.
T85°C: As before for Dust for a Ta +85°C
The other marking refers to the protection type used according to the standards:
Ex 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
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 ha-
zard) as it is shown on the following sketch:
APPLICATION FOR PRESSURE TRANSMITTER EX nL CATEGORIES 3G and 3D
Application with Gas
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.
WARNING
Before installation of the Transmitter, the customer should permanent mark his choosen Protection Concept on the safety label.
The transmitter can only be used with according to this Protection Concept for the whole life. If both types of protection box (on
safety label) are permanent marked, the pressure transmitter must be removed from hazardous classified locations. The selected
Type of Protection is allowed to be changed only by manufacturer after a new satisfactory assessment.
Zone "2"
266 Tx category
3G Ex nL
Note for pressure transmitter with combined approval
Application with Dust
Note: the protection is mainly assured by the "IP" degree associated
to the low power from supply.
2600T Series Pressure transmitters 266 models | SOI/266-XC 17
Zone "22"
266 Tx category
3D IP6x (Ex nL)