VEGA VEGAPULS WL 61 4 … 20 mA_HART - two-wire - Manual (Page 28)

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7 Setup with PACTware
VEGAPULS WL 61 • 4 … 20 mA/HART - two-wire
38061-EN-121011
7 Setup with PACTware
7.1 Connect the PC
1
2 4
3
5
OPEN
TWIST USB
LOCK
Fig. 25: Connecting the PC to the signal cable
1 Sensor
2 HART resistance 250 Ω (optional depending on processing)
3 Connection cable with 2 mm pins and terminals
4 Processing system/PLC/Voltage supply
5 Interface adapter, for example VEGACONNECT 4
Note:
With power supply units with integrated HART resistance (internal
resistance approx. 250 Ω), an additional external resistance is not
necessary. This applies, e.g. to the VEGA instruments VEGATRENN
149A, VEGAMET 381, VEGAMET 391. Common Ex separators are
also usually equipped with a sufficient current limitation resistance. In
such cases, the interface converter can be connected parallel to the
4 … 20 mA cable (dashed line in the previous illustration).
Via interface adapter to
the signal cable