Hazardous Area Considerations; Ex Safety Aspects And Ip Protection (Europe) - ABB 266 HART Series Operating Instruction

11 Hazardous Area considerations

11.1 Ex Safety aspects and IP Protection (Europe)

According to ATEX Directive (European Directive 2014/34/EU
and relative European Standards which can assure compliance
with Essential Safety Requirements, i.e., EN 60079-0 (General
requirements) EN 60079-1 (Flameproof enclosures "d") EN
60079-11 (Equipment protection by intrinsic safety "i") the
pressure transmitters of the 2600T SERIES have been certified
for the following group, categories, media of dangerous
atmosphere, temperature classes, types of protection.
Examples of application are also shown below by simple
sketches.
a) Certificate ATEX II 1 G Ex ia IIC T4/T5/T6 Ga and II 1 D Ex ia
IIIC T85°C Da
FM Approvals certificate number
FM09ATEX0024X (Tremezzina, Minden, Bangalore and
Shangai products)
The meaning of ATEX code is as follows:
— II : Group for surface areas (not mines)
— 1 : Category
— G : Gas (dangerous media)
— D: Dust (dangerous media)
— T85°C: Maximum surface temperature of the transmitter
enclosure with a Ta (ambient temperature) +40°C for Dust
(not Gas) with a dust layer up to 50 mm depth.
Application for pressure transmitter Ex ia categories 1Ga and 1Da
Application with Gas
66 OI/266/HART-EN Rev. M | 2600T Series Pressure transmitters
Zone 0
266 Tx Category 1Ga Ex ia
Note: the transmitter must be
connected to a supply
(associated apparatus)
certified [Ex ia]
11 Hazardous area considerations
Certificate IECEx Ex ia IIC T4/T5/T6 and Ex ia IIIC T85°C Da
IECEx certificate number
IECEx FME 16.0003X (Tremezzina, Minden, Bangalore,
Shanghai products)
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.
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) and "Zone 20" (Dust) classified areas (continuous hazard)
as it is shown on the following sketches.
Application with Dust
Zone 20
266 Tx Category 1Da IP6x Ex ia
Note: the protection is mainly
assured by the "IP" degree
associated to the low power
from supply. This can either be
[ia] or [ib] certified [Ex ia]