VEGA VEGASON 51K…53K - Manual (Page 15)

VEGASON 51K … 53K 15
2
- +
4 … 20 mA
2
2
2
4
Measuring system with VEGASON 51K … 53K in four-wire technology
• Four-wire technology, supply and output signal via two separate two-wire lines
• Output signal 4 … 20 mA active
• Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
• Adjustment with PC, HART ® -handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
• Max. resistance on the signal output (load) 500
Ω
Types and versions
(active) 2)
VEGADIS 50
1 )
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 active means that the sensor delivers
a current of 4 … 20 mA (source) depending on the
level. The sensor, therefore, reacts electrically
against a processing system (e.g. indication) like a
current source.
HART ® -handheld
VEGA-
CONNECT 2
>
200
Ω