VEGA VVO VEGA Visual Operating - Manual (Page 6)

6 VEGA Visual Operating
+
-
VEGACONNECT 2
to sensor
R = 100 W
Instrument connection
3 Instrument connection
3.1 VVO directly on the sensor
VEGACONNECT
2
VEGACONNECT
2
For connection of the PC directly to the sen-
sor, a VEGACONNECT 2 should be con-
nected as adapter. 2 mm-sockets are
provided on all communication capable
VEGA-sensors, where the two-wire line of
VEGACONNECT 2 can be inserted.
3.2 VVO on the 4 … 20 mA-line
Connection possibility via VEGACONNECT 2
on HART
® -capable sensors on the
4 … 20 mA-line. It does not matter if the
power supply of the sensor is provided
separately or via the 4 … 20 mA-line.
A digital signal is additionally superimposed
to the 4 … 20 mA-output of the HART
® -capa-
ble sensor. Note the inner resistor of the
connected processing. If this resistor is
<100
W (e.g. with an indicating instrument),
the digital signal will be damped. In this case
a load resistor of R = 100
W should be looped
into the 4 … 20 mA-line.
With analogue inputs of DCS-systems, this
resistor is in general >100
W, so that there will
be no damping.
3.3 VVO on the VBUS-line
ESC OK
- +
1 2
on
100 %
CONNECT
514 V
4 … 20 mA-line with superim-
posed HART
® -signal
If several sensors are connected via one
BUS-line, VEGACONNECT 2 can be con-
nected to the BUS-line to adjust all other
sensors.