2 connect the pc with vegaconnect 4 – VEGA VEGABAR 75 4 … 20 mA_HART User Manual
Page 23
7
.2 Connect the PC with VEGACONNECT 4
2
4
3
1
OPEN
TW
IST
USB
LO
CK
Fig. 10: Connecting the PC via HART to the signal cable
1
VEGABAR 75
2
HART resistance 250 Ohm (optional depending on the processing)
3
Connection cable with 2 mm pins and terminals
4
Processing system/PLC/Voltage supply
N
ecessary components:
l
VEGABAR
75
l
PC
with PACTware™ and suitable VEGA DTM
l
VEGACONNECT
4
l
HART
resistance approx. 250 Ohm
l
P
ower supply unit or processing system
Note:
W
ith power supply units with integrated HART resistance
(
internal resistance approx. 250 Ohm), an additional external
resistance is not necessary. This applies, e.g. to the VEGA
instruments VEGATRENN 149A, VEGADIS 371, VEGAMET
381). A
lso usual Ex separators are most of the time equipped
with a sufficient current limitation resistor. In such cases,
VEGACONNECT
4
can be connected parallel to the 4 … 20 mA
cable.
Connection via HART
VEGABAR
75 - 4 … 20
mA/HART
23
S
etup with PACTware™
28433
-
EN
-070718