fafnir TORRIX XTS Series, Техническая документация инструкция

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Electrical connection Page 12 / 47
5.1.2 Wiring diagram TORRIX Ex XTS
The level sensor TORRIX Ex XTS with Ex i approval (intrinsically safe) is installed in a poten-
tially explosive atmosphere according to the following wiring diagram:
Figure 8: Wiring diagram TORRIX Ex XTS
Maximum power supply U
max
= 30 V
DC
Minimum supply voltage U
min
= 12 V
DC
Permissible total resistance (incl. line resistances and load)
Σ R = (U - U
min
) / 0.0215 A
The TORRIX Ex level sensor may be connected in potentially explosive atmos-
pheres in the intrinsically safe version only to associated equipment that have
been certified by a recognised inspection authority and whose electrical output
data meets the following conditions:
U
o
≤
30 V
DC
I
o
≤
100 mA / 200 mA (depending on the ambient temperature T
a
)
P
o
≤
1 W
Always make sure that the permissible external capacitance (C
o
) and inductance
(L
o
) of the associated apparatus are not exceeded (refer to the electrical data in
the EU-Type Examination Certificate of the apparatus) if used in a potentially
explosive atmosphere.
The connecting cable to the associated apparatus must be marked if used in po-
tentially explosive atmosphere, preferably as blue cable for intrinsically safe elec-
tric circuits.
Further data of the EU Type Examination Certificate can be found in the ap-
pendix of this manual.
Y
I
+
-
R1
R2
TORRIX
(Ex-Ausführung)
Leitungswiderstände
Trennverstärker
(Beispiel)
Hilfsenergie
4...20 mA
+
-
4...20 mA
8...30 V
Isolating amplifier (example)
12 … 30 V
DC
4 … 20 mA
TORRIX Ex XTS
Power Supply
Line resistance
4 to 20 mA