VEGA VEGAPULS 56K - Manual (Page 42)

42 VEGAPULS 56K
22915-EN-041227
Set-up
5.4 Adjustment with HART ®
handheld
With any HART ® handheld you can set up the
VEGAPULS series 56K radar sensors like all
other HART
® compatible sensors. A special
DDD (Data Device Description) is not neces-
sary.
Just connect the HART ® handheld to the
signal cable, after having connected the
sensor to power supply.
Note:
If the resistance of the power supply is less
than 250 Ohm, a resistor must be connected
into the signal/connection loop during adjust-
ment.
The digital adjustment and communication
signals would otherwise be short-circuited
due to insufficient resistance of the supply
current source or the processing system,
and as a result, communication with the sen-
sor would not be ensured.
Ri < 250
Ω
+
-
250
Ω
Ri < 250
Ω
+
-