ABB 2600T Series Instruction Manual page 133

2 6 0 0 T S E R I E S | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6/ F F - E N R E V. E
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
FM Approvals Certificate number FM09ATEX0023X
(Tremezzina, Warminster, 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 1/2 G and 1/2 D
Application with Gas
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 IP66
and 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 "6" means an enclosure water-protected against powerful jets projected in powerful jets towards the enclosure from
any direction.
The assigned "7" means an enclosure water-protected against a temporary immersion in water under standardized conditions of
pressure and time.
Tank
Zone "1"
Primary
transducer
266 Tx
Category 1/2 G Ex db
Zone "0" / Zone "1"
separation element
Certificate IIECEx Ex db IIC T6 Ga/Gb and Ex tb IIIC T85°C Db,
Ta= -50°C to +75°C
IECEx certificate number IECEx FME 16.0002X (Tremezzina,
Warminster, Bangalore 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
Silo
Zone
"20"
Dangerous
medium
(process)
Zone "21"
266 Tx
Category 1/2 D Ex tb
133