Example Applications; Applications For Ex Nl Transmitters Categories; And 3 D - ABB 2600T Series Operating Instruction

13.5 Applications for Ex nL transmitters Categories 3 G

and 3 D

ATEX II 3 G Ex nL IIC T4/T5/T6 (for T4 = -50 °C ≤ Ta ≤ 85 °C),
(for T5 and T6 = -50 °C ≤ Ta ≤ 40 °C) and II 3D Ex tD A22
IP67 T85°C
Electrical data:
Ui = 42 V DC Ii < 25 mA Ci < 13 nF Li < 0.22 mH
FM Approval "Conformity Statement" - FM09ATEX0070X
IMPORTANT (NOTICE)
— This provides the technical basis for the ABB
declaration of conformity.
— When installed, power must be supplied to
this transmitter by a voltage limiting device
which will prevent the up-scale of the nominal
voltage of 42 V DC.
The meaning of the ATEX code is as follows:
II: Equipment group for hazardous areas above
ground (not mines)
3: Category
G: Gas (dangerous media)
D: Dust (dangerous media)
T85°C: Maximum surface temperature of the transmitter
housing at an ambient temperature Ta of up to
40 °C for dust (not for gas) with a dust layer up to
50 mm thick.
The rest of the tag relates to the type of protection according
to the relevant EN standards:
Ex nL: Type of protection "n", energy-limited equipment
IIC: Explosion group gases
T4: Temperature class of the transmitter (corresponds
to a maximum surface temperature of 135 ) with a
Ta from -50 °C ... 85
T5: Temperature class of the transmitter (corresponds
to a maximum surface temperature of 100 °C) with
a Ta from -50 °C ... 40 °C
T6: Temperature class of the transmitter (corresponds
to a maximum surface temperature of 85 °C) with a
Ta from -50 °C ... 40 °C
This transmitter can be used in Zone 2 (gas) and Zone 22
(dust).
Change from two to one column

13.5.1 Example applications

Application with gas
Zone 2
266 Tx category 3G Ex nL
IMPORTANT (NOTICE)
The transmitter must be connected to a power
supply unit with a maximum output voltage of
42 V DC. The current Ii of the transmitter is less
than 25 mA.
Application with dust
Zone 22
266 Tx category 3D IP6x (Ex nL)
IMPORTANT (NOTICE)
Protection is afforded primarily by the IP degree
of protection; the low level of power consumed
from the power supply unit is also a contributing
factor.
IMPORTANT (NOTICE)
Transmitter with combined approval
Before the transmitter is installed, the selected
type of protection must be indelibly marked on
the explosion certification plate. The transmitter
can then only be operated with this type of
protection throughout its entire operating time. If
two or more types of protection are indelibly
marked on the explosion certification plate, the
transmitter must not be used in areas categorized
as hazardous. The selected type of protection
may only be changed by the manufacturer further
to repeat testing and assessment.
266CRx, 266JRx, 266CSx, 266JSx | OI/266CXX/266JXX/HART-EN Rev. B 71