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Schedule EC-Type Examination Certificate No. TUV 14 ATEX 142076
Sensor communication interface
RS485 ....................................................... in type of protection Intrinsic Safety Ex ib 11B
(Terminals
X3, 1/2; X4, 1/2; X5, 1/2; X6, 1/2)
maximum values per circuit:
U
0
= 4.1 V
l
o
= 105 mA
P
0
= 108 mW
characteristic line: linear
The effective internal inductance and capacitance are
negligibly small.
max. permissible external
10 mH
2 mH
1 mH
0.5 mH
inductance
max. permissible external
14 µF
24 µF
29 µF
36 µF
capacitance
At connection of the sensor communication interface RS485 interface to active intrinsically safe
circuits, the rules for the interconnection of intrinsically safe circuits have to be observed.
Permissible values for the connected circuit:
Sensor supply ......................................... ..
(Terminals X3, 3/4; X4, 3/4; X5, 3/4;
X6, 3/4)
max. permissible external
119 µH
inductance
max. permissibl
.
e external
4.2 µF
capacitance
U
i
= 11
V
I
i
= 176 mA
P
i
= 482 mW
in type of protection Intrinsic Safety Ex ib 11B
Maximum values per circuit:
U
0
= 10.5 V
l
o
= 640 mA
P
0
= 6.72 W
characteristic line: rectangular
100 µH
50 µH
4.9 µF
8 µF
10 µH
14.8
µF
The specified external reactances L
0
and C
0
are valid for simultaneous occurrence. Permissible
combinations of the external reactances L
0
and C
0
have to be taken from the tables of the individual,
intrinsically safe circuits.
The intrinsically safe circuits are safe galvanically separated from the
non-intrinsically safe circuits up to a peak value of the voltage of 375 V.
(16) The test documents are listed in the test report no. 14 203 142076
(17) Special conditions for safe use
None
(18) Essential Health and Safety Requirements
no additional ones
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