ABB 266D Series - Ex Safety Aspects

14 SOI/266-XC | 2600T Series Pressure transmitters 266 models
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 certied 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) Certicate ATEX II 1 G Ex ia IIC T6 and II 1 D Ex iaD 20 T95°C
FM Approvals certicate numbers FM09ATEX0024X respectively FM09ATEX0069X
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)
T95°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.
The other marking refers to the protection type used according to relevant EN standards:
Ex ia : Intrinsic safety, protection level “a”
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) and "Zone 20" (Dust) classied areas (continuous hazard) as it
is shown on the following sketch:
"EX SAFETY" ASPECTS AND "IP" PROTECTION (EUROPE)
The number close to the CE marking of the transmitter safety label identies the Notied Body which has responsibility for
the surveillance of the production
APPLICATION FOR PRESSURE TRANSMITTER EX ia CATEGORIES 1G and 1D
Application with Gas
Application with Dust
Zone "0"
Zone "20"
266 Tx category
1G Ex ia
266 Tx category
1D IP6x (Ex ia)
Note: the transmitter must be connected to a supply (associated
apparatus) certied [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]