ABB 266 HART Series Operating Instruction page 69

According to ATEX Directive (European Directive 2014/34/EU and
relative Standards which can assure compliance with Essential
Safety Requirements, i.e., EN 60079-0 (General requirements) EN
60079-15 (Specification for electrical apparatus with type of
protection "n"), 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.
d) Certificate ATEX II 3 G Ex ic IIC T4/T5/T6 Gc IP67 and II 3 D Ex
tc IIIC T85°C Dc
Ta = -50°C to +75°C - IP67
FM Approvals Certificate number
FM09ATEX0025X (Tremezzina, Minden, Bangalore and
Shanghai products)
The meaning of Atex code is as follows :
— II: Group for surface areas (not mines)
— 3: Category of equipment
— G: Gas (Dangerous media)
— Ex nL: type of protection "n" with "energy limitation"
— 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
Important. It is the technical support for the ABB Declaration of
Conformity.
Application for pressure transmitter Ex ic categories 3Gc and 3Dc
Application with Gas
Important - Note for pressure transmitter with combined approval. Before installation of the Transmitter, the customer should
permanently mark his chosen Protection Concept on the safety label. The transmitter can only be used with according to this Protection
Concept for the whole life. If two or more types of protection box (on safety label) are permanent marked, the pressure transmitter must be
removed from hazardous classified locations. The selected Type of Protection is allowed to be changed only by manufacturer after a new
satisfactory assessment.
Zone 2
266 Tx Category 3Gc Ex ic
Note: the transmitter must
be connected to a supply
with 42V d.c. max output
voltage as above indicated.
The Ii of the transmitter is
less than 25 mA.
11 Hazardous area considerations
Important. When installed this transmitter must be supplied by a
voltage limiting device which will prevent the rated voltage of 42 V
d.c. being exceeded.
About the applications, this transmitter can be used in Zone 2
(Gas) (unlikely/infrequent hazard) as it shown on the following
skecth (left side).
— II 3D Ex tD A22 IP67 T85°C
— II: Group for surface areas (not mines)
— 3: Category of equipment
— D: Gas (Dangerous media)
— Ex tc: type of protection "tc" means protection by enclosure
technique
— IP67: degree of protection of the transmitter acc. EN60529
— T85°C: Maximum surface temperature of the transmitter
enclosure with a Ta from -50°C to +40°C for Dust (not Gas)
About the applications, this transmitter can be used in Zone 22
(Dust) (unlikely/infrequent hazard) as it shown on the following
skecth (right side).
Application with Dust
2600T Series Pressure transmitters | OI/266/HART-EN Rev. M 69
Zone 22
266 Tx Category 3Dc IP6x
Ex tc
Note: the protection is mainly
assured by the "IP" degree
associated to the low power
from supply.