Vega VEGATRENN 149A Ex Manual De Instrucciones página 17

5.3 Wiring plan
Terminal assignment
1
2
3 4
1
Sensor circuit
2
HART communication socket
3
Processing circuit
4
Power 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 +
I- Measuring signal -
VEGA- HART communication sock-
CON- ets
NECT
VEGATRENN 149A Ex
+I –I
I + I –
0 +
0 + H 0 – L / + N / –
Input and
output
Power supply
Power supply
Power supply
Measuring signal
(processing circuit)
"Non-Ex area"
Measuring signal
(sensor circuit) "Ex
area"
HART handheld or
VEGACONNECT
6 Set up
6.1 Operation
There are no adjustment elements on VEGA-
TRENN 149A Ex. Via the HART communication
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
1
LED: indication of the function
2
HART communication sockets
Set up
on
2
CONNECT
149A Ex
0 -
0 +
17