Wiring Plan; Setup; Operation; Indication Of The Function - Vega VEGATRENN 149A Ex Manuel De Mise En Service

5.3 Wiring plan

Terminal assignment
1
2
3 4
Fig. 12: Wiring plan VEGATRENN 149A Ex
1
Sensor circuit
2
HART communication socket
3
Processing circuit
4
Voltage supply
Desig- Terminal assignment
nation
L/+ L (AC), + (DC)
N/- N (AC), - (DC)
Grounding Protective conductor PE
O+ Measuring signal +
O- Measuring signal -
O+H Measuring signal + with
HART resistor
I+ Measuring signal intrinsically
I- safe +
Measuring signal intrinsically
safe -
VEGA- HART communication sock-
CON-
ets
NECT
VEGATRENN 149A Ex
I –
I +
0 +
0 +
0 – L / + N / –
H a r t
Input and
output
Voltage supply
Voltage supply
Voltage supply
Measuring signal
processing circuit
"Non-Ex area"
Measuring signal
sensor circuit "Ex-
area"
HART handheld or
VEGACONNECT

6 Setup

6.1 Operation

There are no adjustment elements on
VEGATRENN 149A Ex. Via the HART communi-
cation sockets in the front, a parameter adjustment
of the connected HART sensors can be carried out
without interrupting the measuring circuit. The
resistor (250 Ω) required for this purpose is already
integrated in VEGATRENN 149A Ex (only in case
of connection of O+H). The adjustment is carried
out via a Windows PC with a parameter adjustment
software such as e.g. PACTware and respective
DTM.

6.2 Indication of the function

The yellow LED in the front plate of VEGATRENN
149A Ex lights as soon as a signal conditioning
instrument is connected to the output.
1
0 + H
Fig. 13: Function indications and HART sockets
1
LED: indication of the function
2
HART communication sockets
on
2
CONNECT
149A Ex
0 -
0 +
Setup
17