VEGA VEGASEL 543, 544, 545, 546, 547 - Manual (Page 3)

VEGASEL 3
Product description
1 Product description
1.1 Function and configuration
Auxiliary level switches are used for additional level
signalling during continuous level measurement. The
auxiliary level switches VEGASEL 543 … 547 are each
provided with a current input 0/4 … 20 mA and a
voltage input 0/2 … 10 V. They are connected to the
current or voltage output of a signal conditioning
instrument VEGAMET or an instrument of other
manufacturers. The output signal must correspond to
the values of the technical data under 1.3 of this
instruction.
With two-point level switches determine the hysteresis
the switch points is set between 1 … 99 %. Two-point
level switches control e.g. the automatic filling or
emptying of a vessel, between two level values.
Magnetic valves, contactors as well as signals can be
connected to the outputs of VEGASEL.
The auxiliary level switches are designed for 19"-
carrier with 5 TE-width (1 TE = 5,08 mm) acc. to DIN
41 494 and can be inserted into carrier BGT 596 or
into housing type 505. The front plate can be covered
by a lockable transparent cover (attached to the
instrument) to protect against unauthorized use or
modification.
!
0/4…20 mA
Fig. 1.1 Continuous level measurement with auxiliary level
switch VEGASEL
The output signal is detected via the switching
amplifier in VEGASEL and converted into a switching
command which is available both as floating relay
contacts and transistors.
VEGASEL 543 … 547 consist of:
-
single point level switches
- two-point level switches
- combination of both
With single point level switches the switch point with
fixed hysteresis (1 % or 3 %) can be adjusted between
1 … 99 %. Single point level switches are normally
used as min. or max. switches for protection against
dry running of pump and overfill protection. The mode
is adjusted on VEGASEL.