Connection Procedure; Voltage Supply - VEGA VEGATRENN 149A Ex Betriebsanleitung

Connecting to power supply

5.2 Connection procedure

Voltage supply

Make sure that the voltage corresponds to the
specifications on the type label.
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 / +
Fig. 8: Connection voltage supply
Sensor circuit (Ex area)
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 +
Fig. 9: Connection sensor circuit
1
Ex area
2
Non-Ex area
Processing circuit (non-Ex area)
Processing systems such as e.g. an
indicating instrument or a PLC system are con-
nected 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
16
N / -
1
2
I -
this version. Keep in mind that in this case the max.
connectable load or load resistance is reduced
(see "Technical data" in the "Supplement").
0+
Hart
VEGADIS 175
Fig. 10: Connection example with HART communication
0+
VEGADIS 175
Fig. 11: Connection example without HART communication
0-
OK
0-
OK
VEGATRENN 149A Ex