VEGA VEGAPULS 56V - Manual (Page 15)

VEGAPULS 56V 15
2
2
4
4
VEGAMET
515V
2
Measuring system with 1 … 2 VEGAPULS 56V Ex, 56V Ex0 with pressure
tight encapsulated connection box on the signal conditioning instrument
VEGAMET 515V
• Two-wire technology, supply from the signal conditioning instrument for operation in Ex
zone 1 (VEGAPULS 56V Ex) or in Ex zone 0 applications (VEGAPULS 56V Ex0)
• Ex-area according to CENELEC and ATEX
• Digital output signal, two sensors on one line
• Optionally external indicating instrument with analogue and digital indication (can be
mounted up to 25 m separated from the sensor)
• Adjustment with PC, signal conditioning instrument or adjustment module MINICOM (can be
plugged into the sensor or into the external indicating instrument VEGADIS 50)
• Max. resistance of the signal line 15
Ω
per wire or 1000␣ m cable length (see also approval
certificates of the separators)
Types and versions
VEGADIS 50
VEGADIS 50
VEGACONNECT 2
Screened line in case of electromag-
netic interferences
1)
Signal conditioning
instrument VEGAMET
515V in housing type
505
Current outputs
Voltage outputs
Relays
Digital
connectability
Fault signals
Ex-area Non-Ex-area
EEx d ia
EEx e
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.
Note!
In Ex-systems earthing on both ends is not
allowed due to the potential difference.
Zone 1
Zone 0
Zone 1
Zone 0