fafnir TORRIX XTS Series, Техническая документация инструкция

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Page 11/ 47 Electrical connection
5 Electrical connection
5.1 Connection Diagrams
5.1.1 Wiring diagram TORRIX XTS
The level sensor without Ex approval is installed according to the following wiring diagram:
Figure 7 : Wiring diagram TORRIX 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
Example:
Standard supply
voltage of 24 V
DC
with a negative tolerance value of - 5 %
Σ R = (24 V
DC
x 0.95 – 12 V
DC
) / 0.0215 A = 502 Ω
The permissible total resistance is about 500 Ω .
+
+
_
Y
I
R1
R2
R3
U
TORRIX
Spannungsquelle
Leitungswiderstände
Bürde
U = 30 V
max
U = 8 V
min
Line resistances
Power supply
Power supply
U
max
= 50 V
DC
Load
U
min
= 12 V
DC
Line resistances
TORRIX XTS