ABB 2600T Serie Bedienungsanleitung Seite 20

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/T5/T6
(for T4 = -50°C ≤ Ta ≤+85°C),
(for T5 and T6 = -50°C ≤ Ta ≤+40°C) and II 3D Ex tD A22 IP67 T85°C.
FM Approvals Certificate number
FM09ATEX0025X (Tremezzina products)
FM09ATEX0070X (Minden products)
FM11ATEX0037X (Bangalore products)
FM11ATEX0048X (Shanghai products)
The meaning of Atex code is as follows :
− II 3G Ex nL IIC T4/T5/T6 (for T4 = -50°C < Ta < +85°C) (for T5
and T6 = -50°C < Ta < +40°C)
− II: Group for surface areas (not mines)
− 3: Category of equipment
− G: Gas (Dangerous media)
− Ex nL: type of protection "n" with "energy limitation" technique
− IIC: gas group
− T4: Temperature class of the transmitter
(which corresponds to 135°C max) with a Ta from -50°C to +85°C
− T5: Temperature class of the transmitter
(which corresponds to 100°C max) with a Ta from -50°C to +40°C
− T6: Temperature class of the transmitter
(which corresponds to 85°C max) with a Ta from -50°C to +40°C
Application for pressure transmitter Ex nL categories 3G and 3D
Application with Gas
Important - Note for pressure transmitter with combined approval.
chosen Protection Concept on the safety label. The transmitter can only be used with according to this Protection Concept for the whole life. If two
or more 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: the transmitter must
be connected to a supply
with 42V d.c. max output
voltage as above indicated.
The Ii of the transmitter is
less than 25 mA.
Important. It is the technical support for the ABB Declaration of
Conformity.
Important. 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)
(unlikely/infrequent hazard) as it shown on the following skecth (left
side)
− II 3D Ex tD A22 IP67 T85°C
− II: Group for surface areas (not mines)
− 3: Category of equipment
− D: Gas (Dangerous media)
− Ex tD: type of protection "tD" means protection by enclosure
technique
− A22: for zone 22 (tested acc. to method A of EN61241-0)
− IP67: degree of protection of the transmitter acc. EN60529
− T85°C: Maximum surface temperature of the transmitter
enclosure with a Ta from -50°C to +40°C for Dust (not Gas).
About the applications, this transmitter can be used in Zone 22 (Dust)
(unlikely/infrequent hazard) as it shown on the following skecth (right
side).
Application with Dust
Before installation of the Transmitter, the customer should permanent mark his
2600T Series Pressure transmitters | SOI/266-XC Rev. J 19
7 Hazardous area considerations
Zone 22
266 Tx Category 3D IP6x
(Ex nL)
Note: the protection is mainly
assured by the "IP" degree
associated to the low power
from supply.