fafnir TORRIX XTS Series, Technical Documentation Manual

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Page 13/ 47 Electrical connection
5.1.3 Wiring diagram TORRIX Exd XTS
The TORRIX Exd XTS level sensor with Ex d approval is installed in a potentially explosive
atmosphere according to the following wiring diagram:
Figure 9: Wiring diagram TORRIX Exd XTS
Maximum power supply U
max
= 50 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 Exd XTS level sensor may be connected in potentially explosive at-
mospheres in this version to all associated equipment whose electrical output
data meets the following conditions:
U
≤
50 V
DC
U
m
= 253 V
I = 4 mA … 20 mA
In the event of an error, the current can also be 3.6 or 21.5 mA.
A certified Ex d or Ex t cable gland (depending on the application) must be
used for the TORRIX Exd XTS.
Further data of the EU Type Examination Certificate can be found in the ap-
pendix of this manual.
+
+
_
Y
I
R1
R2
R3
U
TORRIX
Spannungsquelle
Leitungswiderstände
Bürde
U = 30 V
max
U = 8 V
min
TORRIX Exd XTS
Power supply
U
max
= 50 V
DC
12 … 50 V
DC
4 … 20 mA
Line resistances
Load