VEGA SEL643 User Manual
Operating Instruction
VEGASEL 643
12 43
Level and Pressure
–
–
max.
5
6
++
–
–
min.
5
3
++
on
VEGASEL 643
56 78
9 1011121314
out
in
Contents
Safety information ........................................................................................ 2
1 Product description
1.1 Function and configuration ................................................................. 3
1.2 Approvals ............................................................................................ 3
1.3 Types and versions ............................................................................. 4
1.4 Technical data and dimensions .......................................................... 4
2 Mounting and installation instructions .......................................... 7
3 Electrical connection
3.1 Wiring instruction ................................................................................ 8
3.2 Wiring plan .......................................................................................... 8
4 Set-up
4.1 Indicating and operating elements ................................................... 10
4.2 Set-up sequence .............................................................................. 11
4.3 Switch point adjustment.................................................................... 11
Contents
5 Diagnosis
5.1 Maintenance ..................................................................................... 13
5.2 Repair ............................................................................................... 13
5.3 Failure removal ................................................................................. 13
Safety information
The described module must only be inserted and operated as described in this operating instruction. Please
note that other action can cause damage for which VEGA
does not take responsibility.
2 VEGASEL 643
Product description
1 Product description
1.1 Function and configuration
VEGASEL 643 auxiliary level switch is a build-in instrument with terminal socket, suitable for carrier rail
mounting (DIN 46 277). Together with a sensor or a
VEGAMET… signal conditioning instrument it is used
for level detection.
Typical applications are two-point controls, e.g. pump
controls (ON/OFF) and monitoring functions such as
overfill protection and protection against dry running of
pumps.
The auxiliary level switch is provided with two passive
inputs, a current and a voltage input as well as additionally with an active current input. Hence VEGASEL
643 can be connected for control either with a
VEGAMET… or a sensor (4 … 20 mA).
12 43
–
–
max.
5
6
++
–
–
min.
5
3
++
on
VEGASEL 643
56 78
91011121314
Sensor
(4 … 20 mA)
Fig. 1.2 VEGASEL 643 with sensor
Function
VEGASEL 643, controlled by a VEGAMET…
- The continuous current or voltage course of the
VEGAMET… signal processing instrument is
processed into a switching command.
12 43
100
%
0/4 … 20 mA
50
0 … 10 V
0
!
on
VEGAMET 602EX
56 78
91011121314
Fig. 1.1 VEGASEL 643 on a VEGAMET
VEGASEL 643 with a 4 … 20 mA sensor
- VEGASEL 643 auxiliary level switch powers via the
active current input the sensors and processes its
continuous 4 … 20 mA current signal into a switching command.
12 43
–
–
max.
5
6
or
++
–
–
min.
5
3
++
on
VEGASEL 643
56 78
91011121314
p
p
In both cases a relay output is available for processing.
Configuration
With a VEGASEL 643 an available measuring system,
consisting of sensor and VEGAMET signal conditioning instrument can be extended by a level detection.
Or an own measuring system can be created with a
4 … 20 mA sensor.
1.2 Approvals
If measuring systems are created according to the
following approvals, the respective legal documents
and their regulations have to be observed. These
documents are supplied with the respective measuring system.
WHG-approval, VbF-approval
VEGASEL 643 auxiliary level switch together with a
measuring system (sensor and VEGAMET) as part of
an overfill protection acc. to WHG (test certificate
applied) or acc. to the regulations for combustible
liquids (test certificate applied).
CE-conformity
see „1.4 Technical data“.
VEGASEL 643 3
Product description
off
on
1.3 Types and versions
VEGASEL 643
Two-point auxiliary level switch with selectable mode; mode A (overfill
protection) or mode B (protection against dry running of pumps)
adjustable switching hysteresis
Inputs: - passive current input 0/4 … 20 mA
- active current input (connections of a sensor
4 … 20 mA)
- passive voltage input 0/2 … 10 V
Outputs: 1 relay (spdt)
Approvals: as part of an overfill protection acc. to WHG and
VbF
Application: level detection, overfill protection,
protection against dry running of pumps
Max.
Min.
Fig. 1.2 Two-point auxiliary level switch
VEGASEL 643
1.4 Technical data and dimensions
General data
Power supply
Operating voltage 20 … 250 V AC, 50/60 Hz
Power consumption max. 1,7 W (4,5 VA)
Fuse T 1 A, 250 V
Measuring data inputs
Input 1 1 current input
Kind of input active two-wire input analog
Range 4 … 20 mA
Application connection of sensors (4 … 20 mA)
Sensor supply voltage 16 … 24 V DC
Switching threshold adjustable via coded key
Min. hysteresis 1 %
Current limitation appr. 25 mA, permanently shortcircuit proof
Temperature error 0,05 %/10 K of range
Switch point error 0,5 % of adjusted switch point
Connection cable 2 wire (standard line)
Resistor per conductor max. 35 Ω
Interlock diode for connection of a measuring instrument
20 … 72 V DC
max. load 15 Ω
Level
Time t
Input 2 1 additional current input
Kind of input passive two-wire input analog
Range 0/4 … 20 mA
Inner resistor Ri = 50 Ω
Application direct connection to active current output of e.g.
VEGAMET 601, 602 Ex
Switching threshold adjustable via coded key
Min. hysteresis 1 %
Temperature error 0,05 %/10 K of range
Switch point error 0,5 % of adjusted switch point
4 VEGASEL 643
Product description
Input 3 1 voltage input
Kind of input passive two-wire input analog
Range 0/2 … 10 V DC
Inner resistor Ri ≥ 100 kΩ
Application direct connection to active voltage output of
Switching threshold adjustable via coded key
Min. hysteresis 1 %
Temperature error 0,05 %/10 K of range
Switch point error 0,5 % of adjusted switch point
Connection cable 2-wire (standard line)
Resistor per conductor max. 100 Ω
Electrical connection
Screw terminal max. 1,5 mm
Electrical protective measures
Protection
- instrument IP 30
- terminal socket IP 20
Protection II
Overvoltage category II
Mechanical data
Series module instrument with terminal socket incl.
Mounting carrier rail mounting acc. to DIN 46 277, Bl. 3
Dimensions unassembled W = 36 mm, H = 118,5 mm, D = 134 mm
Weight appr. 170 g
e.g. VEGAMET 601, 602 Ex
2
transparent cover, cover of the sensor terminals,
coded pin, two connection bridges
Ambient conditions
Permissible ambient temperature -20°C … +60°C
Storage and transport temperature -40°C … +70°C
Relay output
Number 1 output
Contact 1 spdt (open 12 - 13, closed 12 - 14)
AgCdO and Au plated
Turn-on voltage min. 10 mV DC
max. 250 V AC, 60 V DC
Switching current min. 10 µA DC
max. 2 A AC, 1 A DC
Breaking capacity max. 125 VA, 54 W
Indicating elements
LED in front plate green on: operating voltage on
yellow on: relay energized
Functions
Mode overfill protection (A)
protection against dry running of pumps (B)
Adjustments of the inputs 0 … 20 mA or 4 … 20 mA
0 … 10 V or 2 … 10 V
VEGASEL 643 5
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