ABB 2600T Series Operating Instruction page 43

. . . ADDENDUM FOR "EX SAFETY" ASPECTS AND "IP" PROTECTION (EUROPE)
Certificate ATEX II 1/2 G Ex d IIC T4/T5/T6
II 1/2 D Ex tD A21 IP67 T85
CESI Certificate number CESI 02 ATEX 027
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). For application with dust layer between 5 and 50 mm, maximum surface temperature must be
consider according to IEC 61241-14 chapter 6.3.3.3.
Note: the number close to the CE marking of the transmitter safety label identifies the Notified Body which carries
out the Surveillance for the production of the transmitter.
The other marking refers to the protection type used according to relevant EN Standards:
Ex d : Flameproof
Ex tD A21 : Construction with flameproof of protection method suitable for Dust - Zone 21
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
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 EN50284 and EN50018.
About Dust application, the transmitter is suitable for "Zone 21" according to the EN 50281 as it is shown on the relevant part of
the sketch:
Application with Gas
Zone "1"
2600T Tx
category
1/2G Ex d
Primary transducer
(Note: for exception
see the certificate)
Zone 0 / Zone 1
Separation elements
Note: the transmitter can be connected to either
[ib] or [ia] supply (associated apparatus)
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 (corresponding to IEC 529).
The first characteristic numeral indicates the protection of the inside electronics against ingress of solid forein 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.
° °
C (-40 C
Zone "0"
Tank
dangerous
medium
(process)
oppure
≤ °
Ta <+85 C)
Application with Dust
Zone "21"
2600T Tx
category 1/2D
IP6x Ex d
Primary
transducer
(Note: for
exception see
the certificate)
Zone 20 / Zone 21
Separation elements
Note: the protection is mainly assured by the "IP degree"
associated to the low power from the supply.
Zone "20"
Silo
dangerous
medium
(process)
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