ABB 2600T Série Mode D'emploi page 17

b) Certificate ATEX II 1/2 G Ex ia IIC T4/T5/T6 and
II 1/2 D Ex iaD 21 T85°C
FM Approvals certificate number
FM09ATEX0024X (Tremezzina products)
FM09ATEX0069X (Minden products)
FM11ATEX0035X (Bangalore products)
FM11ATEX0046X (Shanghai products)
Important. This ATEX Category depends on the application (see
below) and also on the intrinsic safety level of the transmitter supply
(associated apparatus) which can sometimes suitably be [ib] instead
of [ia]. As it is well known, the level of an intrinsic safety system is
determined by the lowest level of the various apparatus used, i.e., in
the case of [ib] supply, the system takes over this level of protection.
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 for pressure transmitter Ex ia categories 1/2G and 1/2D
Application with Gas
Tank
Zone "0"
Dangerous
medium
(process)
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
Zone "1"
Primary transducer
266 Tx
Category
1/2 G Ex ia
Zone "0" / Zone "1"
separation element
Certificate IECEx Ex ia IIC T4/T5/T6 and Ex iaD 21 T85°C, FISCO,
IP67
IECEx certificate number
IECEx FME 09.0003X (Tremezzina and Minden products)
IECEx FMG 11.0019X (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 60079-26 and EN 60079-1. About Dust application, the
transmitter is suitable for "Zone 21" according to the EN 61241-0 and
EN 61241-11 as it is shown on the relevant part of the sketches.
Application with Dust
Silo
Zone "20"
Dangerous
medium
(process)
Note: the protection is mainly assured by the "IP" degree
associated to the low power from supply. This can either be [ia]
or [ib]
2600T Series Pressure transmitters | SOI/266-XC Rev. J 17
7 Hazardous area considerations
Zone "21"
266 Tx
Category
1/2 D Ex ia