fafnir HART TORRIX, Technical Documentation Manual

Page: 12 / 44

Page 9/37 Electrical connection
5 Electrical connection
5.1 Wiring diagram TORRIX
The level sensor without Ex approval is installed in accordance with the following wiring
diagram:
Figure 7: Wiring diagram TORRIX
Power supply: U
max
= 30 V DC
Minimum supply voltage: U
min
= 8 V
Total resistance (including cable resistance and load):
Σ
R = (U - U
min
) / 0.0215 A
To connect the cable, see chapter 5.4
5.2 Wiring diagram TORRIX Ex
The level sensor with Ex approval is installed in accordance with the following wiring dia-
gram:
Figure 8: Wiring diagram for TORRIX in a potentially explosive atmosphere
Power supply: U
max
= 30 V DC
Minimum supply voltage: U
min
= 8 V
Total resistance (including cable resistance and load):
Σ
R = (U - U
min
) / 0.0215 A
+
+
_
Y
I
R1
R2
R3
U
TORRIX
Spannungsquelle
Leitungswiderstände
Bürde
U = 30 V
max
U = 8 V
min
Y
I
+
-
R1
R2
TORRIX
(Ex-Ausführung)
Leitungswiderstände
Trennverstärker
(Beispiel)
Hilfsenergie
4...20 mA
+
-
4...20 mA
8...30 V
Power supply
Line resistance
Load
Isolation amplifier
(example)
Line resistance
Auxiliary power
(Ex version)