VEGA VEGAPULS 81 - Manual (Page 10)

10 VEGAPULS 64 and 81
Types and versions: Configuration of measuring systems
Measuring system with one VEGAPULS 64 sensor (compact instrument)
• Analogue, standardized 0 … 20 mA-current signal as signal output. For adjustment, a digital
adjustment signal is superimposed to the 0 … 20 mA-sensor signal.
• Adjustment and parameter adjustment via a PC and the adjustment program VVO. For adjust-
ment the PC is connected via the adapter VEGACONNECT to the 0 … 20 mA-signal line.
• Optionally an external digital/analogue indication. The indication can be separated from the
sensor up to 25 m.
• The max. permissible resistance (load) of the 0 … 20 mA-signal output is 500 Ω .
In case the input resistors of the processing systems connected to the 0 … 20 mA-signal output
are less than 100 Ω , a resistor of more than 100 Ω must be switched into the 0 ... 20 mA signal
line for the adjustment period.
The digital adjustment signal is short-circuited or damped via too small input resistors so that the
digital communication with the PC would no more be ensured.
2
2
2
– +
0 … 20 mA signal
output and static
digital adjustment
signal
Resistor
≥ 100 Ω
VEGACONNECT
PC with adjustment
software VEGA Visual
Operating
VEGAPULS 64 FK
with integral
processing
2.3 Configuration of measuring systems
A measuring system of sensors with a 0 … 20 mA signal output (compact instrument) consists
only of one sensor. For sensors with digital signal output, the measuring system consists of one
sensor and one VEGAMET signal conditioning instrument or the VEGALOG Processing system.
On this page and the following ones you will see measuring systems with sensors providing a
level proportional 0 ... 20 mA current (compact instruments) as output signal.
On the following pages you will see measuring systems with sensors delivering a digital signal a
VEGAMET signal conditioning instrument or to the VEGALOG Processing system. Signal condi-
tioning instrument or Processing system deliver with these sensors various level proportional
output signals such as 0 … 20 mA currents, 0 … 10 V voltage or switching signals (relay) .