VEGA VEGASON 51K…53K - Manual (Page 11)

VEGASON 51K … 53K 11
4 … 20 mA
2
2
2
2
4
Measuring system with VEGASON 51K … 53K on active DCS
• Two-wire technology, supply on active DCS.
• Output signal 4 … 20 mA (passive).
• Measured value indication integrated in the sensor.
• Optional external indicating instrument (can be mounted up to 25 m away from the sensor
in Ex-area).
• Adjustment with PC, HART ® -handheld or adjustment module (can be plugged in the sensor
or in the external indicating instrument).
HART ® -handheld
VEGA-
CONNECT 2
Types and versions
1) If the resistors of the processing systems
connected to the 4 … 20 mA-signal output are less
than 200
Ω
, a resistor of 250
Ω
to 350
Ω
must be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.
2) 4 … 20 mA passive means that the sensor takes,
depending on the level a current of 4 … 20 mA.
The sensor therefore reacts electrically like a
resistor (consumer) on the DCS.
1 )
VEGADIS 50
passive 2)
DCS