ABB 266 HART Series Operating Instruction page 68

c) Certificate ATEX II 1/2 G Ex db IIC T6 Ga/Gb and II 1/2 D Ex
tb IIIC T85°C Db
Ta = -50°C to +75ºC – IP67
FM Approvals Certificate number
FM09ATEX0023X (Tremezzina, Minden, Bangalore and
Shanghai products)
The meaning of ATEX code is as follows:
— II: Group for surface areas (not mines)
— 1/2: Category - It means that only a part of the
transmitter complies with category 1 and a second part
complies with category 2 (see next application sketch).
— G: Gas (dangerous media)
— D: Dust (dangerous media)
— T85°C: Maximum surface temperature of the transmitter
enclosure with a Ta (ambient temperature) +75°C for Dust
(not Gas) with a dust layer up to 50 mm depth.
Important. The number close to the CE marking of the transmitter
safety label identifies the Notified Body which has responsibility for
the surveillance of the production.
Application for pressure transmitter Ex d categories 1/2G and 1/2D
Application with Gas
Tank
Zone "0"
Dangerous
medium
(process)
IP code
About the degree of protection provided by the enclosure of the pressure transmitter, the 2600T SERIES has been certified IP67
according to EN 60529 standard. The first characteristic numeral indicates the protection of the inside electronics against ingress
of solid foreign objects including dusts.
The assigned "6" means an enclosure dust-tight (no ingress of dust).
The second characteristic numeral indicates the protection of the inside electronics against ingress of water.
The assigned "7"means an enclosure water-protected against a temporary immersion in water under standardized conditions of
pressure and time.
68 OI/266/HART-EN Rev. M | 2600T Series Pressure transmitters
Zone "1"
Primary transducer
266 Tx
Category 1/2 Ga Ex d
Zone "0" / Zone "1"
separation element
11 Hazardous area considerations
Certificate IECEx Ex db IIC T6 Ga/Gb and Ex tb IIIC T85°C Db,
Ta= -50°C to +75°C - IP67
IECEx certificate number
IECEx FME 16.0002X (Tremezzina, Minden and Shanghai
products)
The other marking refers to the protection type used according
to relevant EN Standards:
— Ex d: Explosion proof
— IIC: Gas group
— T6: Temperature class of the transmitter (corresponding to
85°C max) with a Ta from -50°C to +75°C
About the applications, this transmitter can be used in Zone "0"
(Gas) classified areas (continuous hazard) with its "process
part" only, whereas the remaining part of the transmitter, i.e. its
enclosure, can be used in Zone 1 (Gas), only (see sketch
below). Reason of this is the process part of the transmitter
(normally called primary transducer) that provides inside
separation elements to seal off the electrical sensor from the
continuously hazardous process, according to the EN 60079-1.
About Dust application, the transmitter is suitable for "Zone 21"
according to the EN 60079-1 as it is shown on the relevant
part of the sketches.
Application with Dust
Zone "20"
Dangerous
medium
(process)
Silo
Zone "21"
266 Tx
Category 1/2 Db Ex tb