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

266 Models - HART
Hazardous Area considerations

Ex Safety aspects and IP Protection (Europe)

According to ATEX Directive (European Directive 94/9/EC of 23 March 1994) 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") EN 60079-26 (Equipment with equipment protection level -EPL- Ga) EN
61241-0 (General requirements) EN 61241-1 (Protection by enclosures "tD") EN 61241-11 (Protection by intrinsic safety"iD") the
pressure transmitters of the 2600T SERIES have been certified for the following group, categories, media of dangerous atmo-
sphere, temperature classes, types of protection.
Examples of application are also shown below by simple sketches.& Sohn GmbH & Co. KG, Münster, Germany).
a) Certificate ATEX II 1 G Ex ia IIC T4/T5/T6 and II 1 D Ex iaD 20 T85°C
FM Approvals certificate number FM09ATEX0024X (Lenno products) and FM09ATEX0069X (Minden 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.
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 (which corresponds to 135°C max) with a Ta from -50°C to +85°C
T5: Temperature class of the transmitter (which corresponds to 100°C max) with a Ta from -50°C to +40°C
T6: Temperature class of the transmitter (which corresponds 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 sketch:
Application for pressure transmitter Ex ia categories 1G and 1D
Application with Gas
66 OI/266/HART-EN Rev. D | 2600T Series Pressure transmitters
Zone 0
266 Tx Category 1G Ex ia
Note: the transmitter must be
connected to a supply
(associated apparatus)
certified [Ex ia]
Application with Dust
Zone 20
266 Tx Category 1D 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]