VEGA VEGAPULS 45 VBUS - Manual (Page 40)

40 VEGAPULS 42, 44 and 45 – VBUS
VEGALOG
571 CPU
VEGALOG
571 EV
CPU
2
2
2 2
2
4
2
2
4
4
Electrical connection
15 sensors via one two-wire cable on the VEGALOG 571 processing system
• 15 sensors with power supply and digital output signals via one two-wire cable on one input
card of the VEGALOG 571 processing system.
• Display of measured values integrated in the sensor.
• Optional external indicating instrument (can be mounted up to 25 m away from the sensor
also in Ex area).
• Adjustment with PC or adjustment module MINICOM (can be plugged into the sensor or into
the external indicating instrument VEGADIS 50).
• Max. resistance of the signal cable with 15 sensors on one two-wire cable 10
Ω
per wire
(instead of 15
Ω),
max. 1000 m cable length.
1) Sensor wiring should be looped in screened
cables. Please make sure that no earth
compensation currents flow via the screens.
You avoid earth compensation currents (when
grounding at both ends) by connecting the cable
screen on one end (e.g. in the switching cabinet)
via a capacitor (e.g. 10 nF; 1500 V) with the
ground potential.
Processings see also Product
Information "Signal conditio-
ning instruments series 500"
Current outputs
Voltage output
Relay outputs
Transistor output
Fault signals
Display outputs
Digital wiring
Connection to all
bus systems
Screened cable in case of electromag-
netic interferences
1)
VEGALOG 571 processing system
with input cards in 19" rack. 15
sensors on one module card and
cable
Interface cable RS 232
15 sensors per two-wire cable
individual grouping
VEGA-
CONNECT 2
VEGADIS 50
VEGADIS 50
VEGADIS 50