VEGA VEGAPULS 56V - Manual (Page 16)

16 VEGAPULS 56V
VEGALOG
571 CPU
VEGALOG
571 EV
2
2
CPU
2 2
2
4
2
4
2
4
Measuring system with 15 VEGAPULS 56V via one two-wire line on the processing
system VEGALOG 571
• Two-wire technology, voltage supply and digital output signals via one two-wire line from the
processing system VEGALOG 571
• Up to 15 sensors on one two-wire line
• Measured value indication integrated in the sensor
• Optionally external indicating instrument with analogue and digital indication (can be
mounted up to 25 m separated from the sensor)
• Adjustment with PC or adjustment module MINICOM (can be plugged into the sensor or into
the external indicating instrument VEGADIS 50)
• Max. resistance per signal line 15
Ω
per wire or 1000␣ m cable length
Types and versions
VEGADIS 50
VEGADIS 50
VEGA-
CONNECT 2
Screened line in case of electromag-
netic interferences
1)
Processing system VEGA-
LOG 571 with input cards in
19“-rack. 15 sensors on one
module card and two-wire
line
Current outputs
Voltage outputs
Relays
Digital connectability
Fault signals
Connection to all
BUS-systems
Transistor outputs
VEGADIS 50
VEGAPULS 56V
(15 sensors per two-wire line
individual grouping)
1) Sensor lines should be looped in screened cables.
Earth the cable screens on the processing system
or better on the sensor. In case of stronger
electromagnetic interferences it is useful to earth
the cable screens on both ends. However it must
be noted that no earth compensation currents flow
via the screens. In case of earthing on both sides
earth compensation currents are avoided by
connecting the cable screen on one earth side
(e.g. in the switching cabinet) via a capacitor (e.g.
0,1␣
µ
F; 250␣ V) to the earth potential.