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B.2 International Electrotechnical Commission (IEC)
Classification of Hazardous Locations,
Continued
IEC Temperature
Classification
Equipment intended for installation directly within the hazardous
location must also be classified for the maximum surface temperature
that can be generated under normal or fault conditions as referenced to
the maximum operating ambient of the equipment. The maximum
surface temperature must be less than the minimum autoignition
temperature of the hazardous atmosphere present. The temperature shall
be indicated in identification numbers as listed in the following table.
Maximum Temperature
Degrees C Degrees F
Identification Number
450 842
T1
300 572
T2
200 392
T3
135 275
T4
100 212
T5
85 185
T6
Certification and
Conformity Details
Table B-3 CENELEC / LCIE Certification
Code Description
3D
Flameproof, Supply ≤ 45 Vdc, IP 66/67EEx d IIC T6.
3A
Intrinsically Safe EEx ia IIC T5, −40 ≤ Ta ≤ 93°C.
Flameproof, Supply ≤ 45 Vdc, IP 66/67 EEx d IIC T6.
LCIE Intrinsic Safety Parameters
(1)
U
i
= 30 V
I
i
= 100 mA
P
i
= 1.2 W
C
i
= 4.2 nF
R
i
=0
L
i
= 0 With no integral indicator, or with
integral Smart Meter, option SM.
L
i
=
150 µH
With Analog Meter, option ME.
(1)
Install in accordance with Honeywell drawing 51204243.
2/05 ST 3000 Release 300 Installation Guide
91