Vega VEGASEL 643 User manual

Level and Pressure
in out
Operating Instruction
VEGASEL 643
12 43
56 78
9 1011121314
on
max.
min.
VEGASEL 643
––
++
6
5
––
++
3
5

2VEGASEL 643
Contents
Safety information
The described module must only be inserted and oper-
ated as described in this operating instruction. Please
note that other action can cause damage for which VEGA
does not take responsibility.
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
5 Diagnosis
5.1 Maintenance ..................................................................................... 13
5.2 Repair ............................................................................................... 13
5.3 Failure removal ................................................................................. 13

VEGASEL 643 3
Product description
1 Product description
1.1 Function and configuration
VEGASEL 643 auxiliary level switch is a build-in instru-
ment 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 addi-
tionally with an active current input. Hence VEGASEL
643 can be connected for control either with a
VEGAMET… or a sensor (4 … 20 mA).
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.
Fig. 1.2 VEGASEL 643 with sensor
p
p
Fig. 1.1 VEGASEL 643 on a VEGAMET
12 43
56 78
9 1011121314
on
VEGAMET 602EX
%
50
0
100
!
12 43
56 78
9 1011121314
on
max.
min.
VEGASEL 643
––
++
6
5
––
++
3
5
0/4 … 20 mA
or
0 … 10 V
12 43
56 78
9 1011121314
on
max.
min.
VEGASEL 643
––
++
6
5
––
++
3
5
Sensor
(4 … 20 mA)
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 switch-
ing command.
In both cases a relay output is available for process-
ing.
Configuration
With a VEGASEL 643 an available measuring system,
consisting of sensor and VEGAMET signal condition-
ing 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 measur-
ing 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“.

4VEGASEL 643
Product description
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
off
on
Level
Time t
Fig. 1.2 Two-point auxiliary level switch
VEGASEL 643
Min.
Max.
1.4 Technical data and dimensions
General data
Power supply
Operating voltage 20 … 250 V AC, 50/60 Hz
20 … 72 V DC
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
max. load 15 Ω
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

VEGASEL 643 5
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
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
Connection cable 2-wire (standard line)
Resistor per conductor max. 100 Ω
Electrical connection
Screw terminal max. 1,5 mm2
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.
transparent cover, cover of the sensor terminals,
coded pin, two connection bridges
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
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

6VEGASEL 643
Operating elements
Front plate 2 coded key
0 … 99 %
Laterally on top 1 DIL-switch for adjustment
- mode A/B (overfill protection/protection against dry
running of pumps)
- adjustment possibility of the inputs
0 … 20 mA or 4 … 20 mA
0 … 10 V or 2 … 10 V
Electrical separating measures
Reliable separation acc. to VDE 0106, part 1 between power supply, meas. data inputs
and level relais
- limit voltage 250 V
- isolation resistance 3 kV
CE-conformity
VEGASEL signal conditioning instruments meet the protective regulations of EMVG (89/336/EWG) and NSR
(73/23/EWG). The conformity has been judged acc. to the following standards:
EMVG Emission EN 50 081 - 1
Immission EN 50 082 - 2
NSR EN 61 010
12 4
56 78
9 1011121314
118,5
134
54,5
36
3
VEGA
Transparent cover
Carrier rail 35 x 7,5 or
35 x 15 acc. to EN 50 022
Product description

VEGASEL 643 7
Mounting
Each series 600 signal conditioning instrument con-
sists of a terminal socket for carrier rail mounting DIN
46 277 and a module instrument.
The supply voltage can be connected to terminals 9
and 10.
For neighbouring series 600 signal conditioning
instruments it is possible to provide and loop the
connection L1 and N directly via the supplied bridges.
The same is valid for the connection VEGAMET-
voltage output 0 … 10 V to VEGASEL-voltage input
0 … 10 V /terminals 7 and 8).
Note, danger!
Never use the bridges with single instrument or at the
end of an instrument row. They may come in touch
with the operating voltage or cause a shortcircuit.
Coding
The terminal socket must be provided with pins and
the signal conditioning instrument with appropriate
gaps (mechanical coding) to avoid interchanging of
the individual signal conditioning instruments.
An instrument coding ensures that interchanging
among the signal conditioning instruments is avoided
by differently positioned coded keys.
2 Mounting and installation instructions
Mounting and installation instructions
Instrument coding
VEGASEL 643 (pin 4)
12 4
56 78
9 1011121314
3
A o
B o
C o
1 o
2 o
3 o
o
o
o
7 o
8 o
9 o
o
o
o
N
L1
0…10 V
VEGA
Direct connection for
supply voltage
Direct connection for
voltage input 0 … 10 V

8VEGASEL 643
43
+–
12
910
+–
L1
+N 
–
VEGASEL 643
78
+–
10 V
11 12 13 14
3.2 Wiring plan
Electrical connection
3 Electrical connection
3.1 Wiring instruction
The following wiring plan and the extension examples
1 and 2 are valid for standard as well as for Ex-ver-
sions of the signal conditioning instruments. Please
note the following instructions:
- the relay contact is shown in unpressurized
condition
- if strong electromagnetic interferences are ex-
pected, we recommend to use screened cable for
the signal lines
- the screening must only be earthed at one sensor
side
- in case of overvoltages we recommend the use of
VEGA-overvoltage arresters
- the connection must be made according to the
appropriate national installation standards (e.g. in
Germany according to VDE-regulations).
passive voltage input for
connection to the voltage
output of a signal conditioning
instrument (VEGAMET…)
Relay output
Supply voltage
passive current input for
connection of a signal condi-
tioning instrument
(VEGAMET…)
active current input for connec-
tion of a sensor (4 … 20 mA)
Sensor

VEGASEL 643 9
Electrical connection
Extension example 1
Instrument 1: VEGASEL 643 actively switched
Instrument 2 up to max. instrument 5: VEGASEL 643 passively switched
Note:
The voltage inputs (7, 8) must not be used when the current inputs are switched.
Extension example 2
Instrument 1: VEGAMET 601 or 602 Ex
Instrument 2 up to max. instrument 10: VEGASEL 643 each switched to passive voltage input (parallel switching)
Note:
Current inputs (3, 4) must not be used when the voltage inputs are switched.
According to the extension examples it is possible to control several signal conditioning instruments with one
sensor and hence to detect different levels.
This kind of switching can be extended each up to 5 or 10 instruments.
12 43
+
–
12 12
VEGASEL
43 43
VEGASEL VEGASEL
+–+–
+–+–+–
12
+
–
12 12
VEGAMET
43 43
VEGASEL VEGASEL
87 87 87
+–+–
+–
10 V 10 V 10 V
+–+–+–+–
43
+–
Sensor (4 … 20 mA)
Instrument 1 Instrument 2 .................... up to max. . instrument 5
Sensor
Instrument 1 Instrument 2 .................... up to max. . instrument 10
active
passive passive
Current
inputs
Current
inputs Current
inputs
Voltage input
Voltage input
Voltage input

10 VEGASEL 643
Set-up
4 Set-up
4.1 Indicating and operating elements
1 Key for value falling
2 Coded key for max. switch point
3 Key for value raising
4 Coded key for min. switch point
5 Status indication of the output
6 LED-supply voltage
7 Separating wall
8 Terminals current input
9 Terminals voltage input
10 Terminals supply and relay output
11 Bar code, series number
12 DIL-switch block
13 Screws
14 Ventilation opening
15 Transparent cover
12 43
56 78
9 1011121314
on
6
7
8
10
max.
min.
VEGASEL 643
––
++
6
5
––
++
3
5
2
1
3
4
5
9


























11
12
13
14
15
Top view, laterally

VEGASEL 643 11
Set-up
• Mount the terminal socket.
• Wire the input terminals of the terminal socket acc.
to the above mentioned conditions.
• Cover the input terminals with the separating
chamber.
• Switch the output of the auxiliary level switch acc. to
the technical requirements.
• Adjust on the DIL-switch (11) the range of the
inputs.
• When connecting a sensor to the active current
input (terminals 1 and 2) set the DIL-switch to
4 … 20 mA.
• Select on the DIL-switch (11) the desired mode.
• Adjust the switch points acc. to “section 4.3”.
• Mount the module unit to the terminal socket.
• Switch on the supply voltage, the green LED (6)
lights.
4.3 Switch point adjustment
Single point control
With a single point control it is possible to generate at
one point of the input signal (0…10 V or 0/4…20 mA) a
switching signal.
Coded key
Coded keys (2 and 4) are located in the front plate by
which the switch point (with single point level
switches) as well as the switching hysteresis (with
double point level switches) can be adjusted.
The figures are given in % and relate to the current or
voltage input. By pushing the buttons „+“ or „–“ you
can adjust the requested values raising or falling in
1 % or 10 %-steps.
Signal lamps
Green (6)
- Supply voltage on, ready for operation
Yellow (5)
- Status indication of the relay output
(LED lights = relay energized,
LED extinguished = relay de-energized)
DIL-switch (13)
Laterally on top. When the signal conditioning instru-
ment is mounted, covered by the terminal socket.
Description of the individual functions
Adjustment possibility
- Current input 0 … 20 mA or 4 … 20 mA
voltage output 0 … 10 V or 2 … 10 V
- Mode A or B
A = overfill protection, B = protection against dry
running of pumps
12 13 14
t
12 13 14
79/80
%
100
0
Coded key
max. 80
Hysteresis
1 %
min. 79
Mode A
Mode B
0..
B
2..10V
4..20mA
A
4.2 Set-up sequence
The following list states the essential set-up steps in
short
Pre-requirement:
VEGASEL 643 auxiliary level switch is connected with
a measuring system (sensor and VEGAMET…) or
directly with a sensor (4 … 20 mA).
Procedure
• Adjust the switch point on both coded keys.
• As example min. = 79 %, max. = 80 %, with this
adjustment there is a hysteresis of 1 %.
• Possible adjustment range 1 % … 99 %.
• The auxiliary level switch is hence ready for opera-
tion. Please cover with the transparent cover (15).

12 VEGASEL 643
Set-up
Double point control
With a double point control it is possible to generate
switching signals at two different points of the input
signal (0/2 … 10 V or 0/4 … 20 mA).
Procedure
• Adjust the coded key with different values.
• Possible adjustment range 1 % … 99 %.
• As example min. = 20 %, max. = 60 %, with this
adjustment there is a hysteresis of 40 %.
• The auxiliary level switch is hence ready for opera-
tion. Please cover with the transparent cover (15).
Note:
Adjust the percentage values with the coded keys
which relate to the input signal.
Example 1
- Voltage input 0 … 10 V
- Two-point control
- Switch points min. = 20 %, max. = 60 %
0 … 10 V corresponds to 0 % … 100 %, ∆ = 10 V
20 % of 10 V = 2 V
60 % of 10 V = 6 V
Switch point 20 % corresponds to 2 V
Switch point 60 % corresponds to 6 V
Example 2
- Voltage input 2 … 10 V
- Two-point control
- Switch points min. = 20 %, max. = 60 %
2 … 10 V corresponds to 0 % … 100 %,
∆ = 10 V – 2 V = 8 V
20 % of 8 V = 1,6 V
60 % of 80 V = 4,8 V
Switch point 20 % corresponds to 1,6 V + 2 V = 3,6 V
Switch point 60 % corresponds to 4.8 V + 2 V = 6,8 V
Example 3
- Current input 0 … 20 mA
- Two-point control
- Switch points min. = 20 %, max. = 60 %
0 … 20 mA corresponds to 0 % … 100 %, ∆ = 20 mA
20 % of 20 mA = 4 mA
60 % of 20 mA = 12 mA
Switch point 20 % corresponds to 4 mA
Switch point 60 % corresponds to 12 mA
Example 4
- Current input 4 … 20 mA
- Two-point control
- Switch points min. = 20 %, max. = 60 %
4 … 20 mA corresponds to 0 % … 100 %,
∆ = 20 mA – 4 mA = 16 mA
20 % of 16 mA = 3,2 mA
60 % of 16 mA = 9,6 mA
Switch point 20 % corresponds to 3,2 mA + 4 mA =
7,2 mA
Switch point 60 % corresponds to 9,6 mA + 4 mA =
13,6 mA
The calculation and information examples are valid in
the same way for the single point control.
t
60
%
100
0
20
12 13 14
12 13 14
Coded key
max. 60
^ Hysteresis
40 %
min. 20
Mode A
Mode B

VEGASEL 643 13
5.3 Failure removal
Failure Removal / Measure
Instrument does not
function, the green
mains control lamp
extinguishes Check the supply voltage and the mains connection by means of the „Connection
instructions“. When the instrument still does not function, contact our service
department.
Instrument does not
switch correctly Check the position of the coded keys. The switch points for min. and max. must not
be set to the same values. Correct if necessary the values.
Instrument does not
switch when using the
active input Check the connected measuring data input
- Check wiring, see „3.3 Wiring plan and extension examples“
- Check voltage or current values on their nominal range, see „1.4 Technical data“.
- The auxiliary level switch is internally provided with an interlock diode. A measuring
instrument connected to terminal 2 and 3 is hence automatically switched into the
circuit of the measuring line (switching in series).
Hence it is possible to check the measuring line. The measuring instrument
indicates the actual current.
5 Diagnosis
5.1 Maintenance
The instrument is maintenancefree.
5.2 Repair
For safety and guarantee reasons repairs on the
instrument must only be carried out by VEGA-staff.
Diagnosis
In case of a defect please return the respective instru-
ment along with a short description of the fault to our
repair department.
Occurring faults, possible reasons and their removals
are stated under „5.3 Failure removal“.
mA
12 43
Load of the measuring
instrument
max. 15 Ω

14 VEGASEL 643
Notes

VEGASEL 643 15
Notes

VEGA Grieshaber KG
Am Hohenstein 113
D-77761 Schiltach
Phone [phone] - 0
Fax [phone] - 201
Fax [phone] - 203
ISO 9001
Technical data subject to alterations 2.19 955 / Sept. 1996