VEGA VEGALOG 571 CPU and carrier User Manual
Page 21
EP card
The EP card (Eingang Profibus PA, i.e. input PROFIBUS PA)
is used as input card for Profibus PA sensors of VEGA or other
manufacturers. Up to max. 15 Profibus PA sensors (max. 10
with Ex version) can be connected.
The EP (Ex) card recognises VEGA sensors on their serial
number and assigns automatically a bus address. For instru-
ments of other manufacturers, the Profibus address must be
assigned separately for each instrument.
The power supply of the sensors, the transmission of the
sensor measuring signals as well as the parameter adjustmetn
commands are carried out via the same bus cable.
AA card
The AA card (Ausgang Analog, i.e. output analogue) provides
the processing results via up to ten analogue currents in the
range of 0 … 20 mA. The scaling as well as the definition as
rising or falling characteristics is carried out via the PC with
PACTware™.
Indicating instruments, recorders, controllers or PLC systems
are connected to these outputs.
AR card
The AR card (Ausgang Relais, i.e. output relay) provides ten
relay outputs with floating contacts. Connected are, for
example:
l
Acoustic or optical signalling systems
l
Magnet valves
l
Contactors for pump control, etc.
The AR card is used to output switching, single or sum fault
messages. The switching status of each relay is indicated via a
two-colour LED in the front plate. This LED lights depending on
the parameter adjustmetn of the relay (limit contact yellow or
fail safe relay red). Each fail safe relay can be individually
assigned to one or several measurement loops. The definition
of the relay function, the switching points as well as the LED
colour is carried out via the PC with PACTware™.
AT card
The AT card (Ausgang Transistor, i.e. output transistor)
provides ten floating outputs via NPN trransistors. Binary input
cards of PLC systems are connected.
The application possibilities and the signalling of the switching
condition correspond to those of the AR card.
Output cards
VEGALOG 571 - CPU and carrier
21
Set up
31947
-EN
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