13
5 Connection examples
VEGACONNECT • Wired interface adapter with connection box
66081-EN-211221
3
4
2
1
Fig. 7: Insertion into VEGADIS 82
1 HART sensor
2 VEGADIS 82
3 USB cable for connection to the PC
4 Processing system/PLC/Voltage supply
5.2 Connection via HART interface
If the resistance of the connected processing system is less than
230 Ω, the digital adjustment signal is extremely damped or short-cir
-
cuited. Digital communication with the PC is then no longer possible.
With low impedance processing systems, a resistance of at least
230 Ω must be integrated into the 4 … 20 mA connection cable. The
connection of VEGACONNECT can be either carried out in parallel to
the sensor or via the resistor.
Note:
A HART resistor is already integrated in some controllers. These
devices have additional connection sockets for direct connection of
the 2 mm pins.
When using VEGAMET 624/625, VEGASCAN 693 controllers, the
connection cannot be carried out via the sensor cable. The parameter
adjustment of the controller as well as of the sensor can be carried
out via the I²C connection sockets.
HART sensor with
VEGADIS 82
HART communication
