Mounting Instructions; Connecting To Voltage Supply; Preparing The Connection; Connection Procedure - Vega TRENN 149A Ex Instrucción De Servicio

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4.1 Mounting instructions

VEGATRENN 149A Ex is constructed for carrier
rail mounting according to EN 50022. Through
protection IP 20, the instrument is suitable for
mounting in switching cabinets.
VEGATRENN 149A Ex is a corresponding,
intrinsically safe equipment and must not be
installed in hazardous areas. A safe oper-
ation is only ensured if the operating
instructions and EG type approval certifi-
cate are observed. VEGATRENN 149A Ex
must not be opened.
A distance of 50 mm to the intrinsically safe
terminals must be ensured when mounting.
5 Connecting to voltage
supply

5.1 Preparing the connection

Note safety instructions
Generally note the following safety instructions:
Nur in spannungslosem Zustand anschließen
l
If overvoltages or voltages peaks are ex-
l
pected, overvoltage arresters should be in-
stalled
Sicherheitshinweise für Ex-Anwendungen
beachten
In hazardous areas you should take note of
the appropriate regulations, conformity and
type approval certificates of the sensors
and power supply units.

5.2 Connection procedure

Voltage supply
Stellen Sie vor der Inbetriebnahme sicher, dass die
Spannungsversorgung mit den Angaben auf dem
Typschild übereinstimmen.
VEGATRENN 149A Ex
In the voltage range of 90 ... 250 V AC an easily
accessible switch marked as separating facility as
well as an overload protection (nominal current
≤10 A) must be located near the instrument in the
feed cable.
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
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
resistor 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 resistor reduces (see
"Technical data" in the "Supplement").
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N / -
1
-I -I
2
I -
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