Vega VEGATRENN 149A Ex Manual De Instrucciones página 16

Connecting to power supply
In the voltage range of 90 ... 230 V AC, an easily
accessible switch marked as cut-off switch as well
as an overload protection device (nominal current
≤ 10 A) must be installed in the feed circuit near the
instrument.
L / +
Sensor circuit
The sensor must be connected to the blue
connection terminals I+ and I-. The sensor circuit of
the separator VEGATRENN 149A Ex is separated
from the processing circuit.
+I
I +
1
Ex area
2
Non-Ex area
Processing circuit
Processing systems such as e.g. an indicating
instrument or a PLC system are connected to
terminals O+/O-/O+H.
If a HART handheld or an interface adapter
VEGACONNECT is connected to the communica-
tion sockets in the front, the processing system
must be connected to terminals O+H and O-. The
resistance necessary for HART communication is
already integrated in VEGATRENN 149A Ex with
this version. Keep in mind that in this case the max.
connectable load or load resistance is reduced
(see "Technical data" in the "Supplement").
16
N / -
1
-I
2
I -
0+H
VEGADIS 175
Fig. 4: Connection example with HART communication
0+H 0+
VEGADIS 175
Fig. 5: Connection example without HART communication
0+ 0-
OK
0-
OK
VEGATRENN 149A Ex