ABB 2600T Series - Application for pressure transmitter Ex ia categories 1;2 Ga and 1;2 Da; Application for pressure transmitter Ex d categories 1;2 G and 1;2 D

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2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
b) Certificate ATEX II 1/2 G Ex ia IIC T4/T5/T6 Ga/Gb and
II 1/2 D Ex ia IIIC T85°C Da - FISCO
FM Approvals certificate number FM09ATEX0024X
(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 from -50°C to +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..
Application with Gas
Application for pressure transmitter Ex ia categories 1/2 Ga and 1/2 Da
Certificate IECEx Ex ia IIC T4/T5/T6 Ga/Gb and
Ex ia IIIC T85°C Da - FISCO
IECEx certificate number IECEx FME 16.0003X (Tremezzina,
Warminster, Bangalore, Shanghai products)
The other marking refers to the protection type used according
to relevant EN standards:
• Ex ia: Intrinsic safety, protection level “a”
• IIC: Gas group
• T4: Temperature class of the transmitter (corresponding to
135°C max) with a Ta from -50°C to +85°C
• T5: Temperature class of the transmitter (corresponding to
100°C max) with a Ta from -50°C to +40°C
• T6: Temperature class of the transmitter (corresponding to
85°C max) with a Ta from -50°C to +40°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 60079-0 and EN 60079-11 as it is shown on
the relevant part of the sketches.
Application with Dust
Note: the transmitter can be connected to either [ib] or [ia]
supply (associated apparatus)certified [Ex ia]
Note for “Primary transducer”: see the certification for
exceptions
Note: the protection is mainly assured by the “IP” degree
associated to the low power from supply. This can either be
[ia] or [ib]
Zone “0”
Zone “1”
Dangerous
medium
(process)
Tank
Zone “0” / Zone “1”
separation element
Primary
transducer
266 Tx
Category 1/2 G Ex ia
Zone “20”
Zone “21”
Dangerous
medium
(process)
Silo
266 Tx
Category 1/2 D Ex ia