Operating Instructions
VEGASWING 71A and 75A
Level and Pressure
Contents
Safety information ........................................................................ 2
1 Product description
1.1 Function and configuration .................................................. 3
1.2 Principle of operation ........................................................... 3
1.3 Technical data ....................................................................... 4
1.4 Dimensions ........................................................................... 6
2 Mounting
2.1 Mounting instructions ........................................................... 8
3 Electrical connection
3.1 Connection instructions ..................................................... 10
3.2 Wiring plan .......................................................................... 11
4Setup
4.1 Switching status ................................................................. 13
4.3 Functions chart ................................................................... 13
4.2 Switching point ................................................................... 13
Contents
5 Diagnostics
5.1 Function test ....................................................................... 14
5.2 Replacement of the electronics ......................................... 15
5.3 Maintenance ....................................................................... 15
Safety information
Please read this manual carefully, and also take
note of country-specific installation standards
(e.g. the VDE regulations in Germany) as well
as prevailing safety regulations and accident
prevention rules.
For safety and warranty reasons, any internal
work on the instruments, apart from that involved in normal installation and electrical connection, must be carried out only by qualified
VEGA personnel.
2 VEGASWING 71A and 75A
Product description
1 Product description
1.1 Function and configuration
VEGASWING series 70 vibrating level
switches detect levels of liquids with a viscosity of 0.2 up to 10.000 mPa s and a density of ≥ 0.6 g/cm
enables their use in machines, plants, vessels and pipelines, even in applications severely limited in space. Typical applications
are overfill and dry run protection.
VEGASWING 71A is optionally available with
threads G 1 A and 1" NPT. The stainless steel
housing (1.4571) is in protection class IP 67.
VEGASWING 75A is mainly suitable for level
detection in the food processing and pharmaceutical industry. Due to the polished
sensor surface (R
bacteria have no chance to collect.
VEGASWING 75A is also suitable for CIP and
SIP cleaning. Many different hygienic fittings
such as conus with compression nut, TriClamp 11/2" and 2", bolting, Tuchenhagen
Varivent or special hygienic connections are
available.
Due to the simple and rugged measuring
system, VEGASWING is virtually unaffected
by the chemical and physical properties of
the liquid. They work even under unfavourable conditions such as turbulences, air
bubbles, foam generation, buildup or varying
products. An adjustment to the medium is not
necessary.
3
. Modular construction
≤ 0.5 µm or Ra ≤ 1.5 µm)
a
1.2 Principle of operation
The tuning fork is piezoelectrically energised
and vibrates at its mechanical resonance
frequency of approx. 400 Hz. This frequency
is transferred to the electronics of VEGASWING. When the tuning fork is submerged in
the product, the frequency changes. This
change is detected by the integrated oscillator and converted into a switching command.
By changing of poles of the supply voltage,
the switching condition can be defined (max.
detection/min. detection). With the transistor
version, PNP or NPN action can be preset by
a different connection of the consumer (load).
The integrated fault monitoring detects:
- interruption of the connection cable to the
piezo elements
- extreme wear on the tuning fork
- break of the tuning fork
- no vibration.
If one of the stated failures is determined or in
case of voltage loss, the electronics takes on
a defined switching condition, e.g. the output
transistor blocks.
The electronics can be exchanged without
problems. VEGASWING must not be removed.
VEGASWING has an integrated test switch
which can be activated magnetically. It tests
the sensor electronics and the connected
instruments.
VEGASWING 71A and 75A 3
1.3 Technical data
Housing
Housing material stainless steel 1.4571
Protection IP 67
Torque on the hexagon 80 Nm
Plug connection 4-pole plug
with status indication (illuminated ring)
Terminals max. 1 x 1.5 mm
Process connection
VEGASWING 71A
- thread G 1 A or 1" NPT
- material 1.4571 (stainless steel)
VEGASWING 75A
- thread G 1 A or 1" NPT
- conus DN 25
- Tri-Clamp 11/2" or 2"
- bolting DN 40 or DN 50
- Tuchenhagen Varivent
- hygienic connection with compression nut F40 PN 25
- hygienic connection with tension flange DN 32 PN 25
Tuning fork
Material 1.4581 (stainless steel)
Weight
Total weight approx. 0.4 kg
Product description
2
Ambient conditions
Ambient temperature on the housing -40°C … +70°C
Storage and transport temperature -40°C … +70°C
Product temperature -40°C … +150°C
Ambient temperature on
the housing
70°C
50°C
30°C
100°90°80°
110° 120° 130° 140° 150°C
Product
temperature
Operating pressure max. 40 bar
Product
Viscosity 0.2 … 10.000 mPa s
Density ≥ 0.6 g/cm
4 VEGASWING 71A and 75A
3
Product description
Electronics - General
Integration time approx. 0.5 s
Meas. frequency approx. 400 Hz
Hysteresis approx. 4 mm with vertical installation
Control lamp illuminated ring with two-colour LED for status
indication
green – output conductive
red – output blocks
Electronics - Transistor output (SWING E72 T)
Power supply 10 … 55 V DC
Power consumption max. 0.5 W
Output floating transistor output
NPN/PNP selectable
Load current max. 400 mA (output - overload and
permanently short-circuit proof)
Voltage loss max. 1 V
Turn-on voltage max. 55 V DC
Blocking current < 10 µA
Protection class II
Overvoltage category III
Mode A - max. detection or overfill protection
B - min. detection or dry run protection
A/B-mode by polarisation of the power
supply
Electronics - contactless electronic switch (SWING E72 C)
Power supply 20 … 250 V AC, 50/60 Hz or 20 … 250 V DC
Output contactless electronic switch
Internal current requirement approx. 3 mA (via the load circuit)
Load current min. 10 mA
max. 400 mA
(at I > 300 mA the ambient temperature can be
max. 60°C) max. 4 A up to 40 ms
Protection class I
Overvoltage category III
Modes A/B-mode by electrical connection
in the connection plug
A - max. detection, overfill protection
B - min. detection, dry run protection
CE conformity
VEGASWING 71A and 75A vibrating level switches meet the protective regulations of EMC
(89/336/EWG) and NSR (73/23/EWG). Conformity has been judged acc. to the following
standards:
EMC Emission EN 50 081 - 1: 1992
Susceptibility EN 50 082 - 2: 1995
NSR EN 61 010 - 1: 1993
VEGASWING 71A and 75A 5
1.4 Dimensions
VEGASWING 71A
Ø 40
SW41
265
Ø 29
129
100
25
G1A oder
1" NPT
Optional with weld
mark
Product description
30,5
Ø 60
Front side
O-ring seal
6 VEGASWING 71A and 75A
Product description
VEGASWING 75A
Ø 40
Housing IP 66/IP 67 of 1.4571 with
plug
125
265
129
100
Bolting
DN 40 / 50
DIN 11 851
153
113
25
Ø 29
30,5
100
25
Ø 60
Rd 65x
Ø 40
SW 41
G1A oder
1" NPT
Ø 29
1
/
6
Conus
DN 25
168
112
25
Compression nut
F40 PN 25
167
113
Ø 55
Ø 80
Rd 65x
Ø 29
Ø 29
1
/
6
TRI-Clamp
11/2" TRI-Clamp 2"
Ø 29
146
119
21,5
Ø 35,6
Tension
flange
F32 PN 25
Ø 38,6
Ø 29
167
113
Ø 90
Ø 72/6xM6
146
115
21,5
Tuchenhagen
Varivent
146
116
Ø 47,8
Ø 50,8
Ø 29
Switching point
Ø 29
Switching
point
33
Ø 38
Ø 43
1
/
Rd 77x
6
35
Ø 49
Ø 54
40
Ø 79,6 Ø 79,6
40
VEGASWING 71A and 75A 7
2 Mounting
Mounting
2.1 Mounting instructions
In principle, VEGASWING can be mounted in
any position. The instrument must be
mounted such that the tuning fork is at the
height of the required switching point. Note
the following installation instructions:
Switching point
The tuning fork is provided with lateral markings (notches, 25 mm from the fork tip),
marking the switching point with vertical installation for the medium water. When installing VEGASWING, note that the switching
point of the instrument shifts when the medium has a density differing from water (water = 1.0 g/cm3).
Switching point with
lower density
25
Switching point
Switching point
with higher
density
Switching
point
75
Flow
(e.g. in pipes)
When mounting in pipes or in vessels with
certain flow direction, you should mount
VEGASWING such that the surfaces of the
tuning fork are aligned with the direction of
flow.
Adhesive products
In the case of adhesive and viscous products, the tuning fork should protrude into the
vessel to avoid buildup in the mounting boss.
A mounting boss should therefore not exceed a length of 30 mm.
30 mm
Fig. 2.2
In the case of horizontal mounting in adhesive
and viscous products, the surfaces of the
tuning fork should be vertical to reduce
buildup on the tuning fork. The position of the
tuning fork is marked by two notches on the
hexagon of VEGASWING. Therefore you can
check the position of the tuning fork when
screwing it in. One notch should be on top.
When the hexagon touches the seal, the
thread can be still turned by approx. half a
turn. This is sufficient to reach the recommended installation position.
Switching
point
Switching
point
Fig. 2.1
8 VEGASWING 71A and 75A
Top marking
Fig. 2.3
Mounting
Transport
Do not hold VEGASWING on the tuning fork.
The tuning fork can be damaged.
60°
Polished version
(VEGASWING 75A)
Treat instruments with polished tuning fork
(VEGASWING 75A) very carefully and do not
touch the polished surface.
Unpack VEGASWING 75A directly before
mounting. Insert VEGASWING carefully into
the provided opening and avoid contact with
vessel parts.
Cable entries
When mounting outside, on cooled vessels or
in humid areas in which e.g. cleaning is done
with steam or high pressure, the seal of the
cable entry is especially important. Use cable
with sufficient wire cross-section and tighten
the cable entry. For cables with too small wire
cross-section, a suitable reduction piece
must be used to ensure tightness of the
cable entry.
Two seal rings are attached to the instrument
to ensure tightness also of cables with
smaller diameter. Use the smallest possible
seal ring.
To avoid humidity ingress, the cable entry
should point downwards (see fig. 2.4).
60°
Fig. 2.5
Proceed as follows: Loosen the plug by unscrewing the knurled ring. Loosen the connection screw and remove the socket insert
out of the angular housing of the plug (see
also fig. 3.1 under "3.1 Connection instructions").
You can turn the angle housing of the plug in
60° steps (see fig. 2.5).
With vertically mounted VEGASWING, loop
the connection cable to the instrument housing downwards so that rain and condensation
water can drain off.
Welded socket G 1 A
VEGASWING’s thread start is defined. This
means that each VEGASWING is in the same
position after screwing in. Therefore remove
the supplied seal from the thread of VEGASWING. This seal is not required when using a
welded socket (G 1 A). Screw VEGASWING
into the welded socket.
You can determine the subsequent position
of VEGASWING before welding (see also fig.
2.3). Mark the appropriate position of the
welded socket. Before welding, unscrew
VEGASWING and remove the rubber ring
from the socket.
An optional welded socket (G 1 A) is available which is already provided with a notch.
Weld this socket with a marking facing upwards (see fig. 2.6).
Marking
Fig. 2.4
Fig. 2.6
VEGASWING 71A and 75A 9
3 Electrical connection
Electrical connection
3.1 Connection instructions
Note
Switch off the power supply before starting
connection work.
Remove the plug. Loosen the screw (7) and
disassemble the plug. Lead the connection
cable through the cable entry and connect
the cables according to the following illustrations.
2
3
4
1
7
6
1 Socket insert
2 Angle housing
3 Seal ring (3 pcs. for different cable ø)
4 Clamping basket
5 Pressure screw
6 Illuminated ring with LED
7 Connection screw
5
Fig. 3.1
Plug connection
Terminals 1 - 4 are marked on the plug.
Terminal 1
Terminal 4
Terminal 3
1
4
2
3
Terminal 2
Fig. 3.2
10 VEGASWING 71A and 75A
Electrical connection
3.2 Wiring plan
Floating transistor output
(SWING E72 T)
Power supply: 10 … 55 V DC
(for further information see the following connection examples as well as technical data)
To determine the switching status of the transistor output (mode A/B), the supply cable
(terminals 1 and 4) must be polarised respectively.
Mode A
Max. detection or overfill protection:
- terminal 1: +
- terminal 4: –
Mode B
Min. detection or dry run protection:
- terminal 1: –
- terminal 4: +
Through different connections of the consumer (load), NPN or PNP action can be
preset. Take care that during connection,
terminal 2 has always a more positive voltage
potential than terminal 3.
Mode B
U
B
1
NPN action PNP action
U
B
2
3 4
–
+
U
B
1
U
B
2
3 4
–
+
The transistor switches a second voltage
source with the same reference potential to
the binary input of a PLC or to an electrical
load.
Mode A
U
B
1
U
B
2
3 4
U
B
1
U
B
2
3 4
Connection examples
The transistor switches the supply voltage of
the oscillator to the binary input of a PLC or to
an electrical load.
Mode A
U
B
1
NPN action PNP action
U
B
2
3 4
+
–
U
B
123 4
+
U
B
–
+
NPN action PNP action
–
+
+
Mode B
U
B
1
NPN action PNP action
U
B
2
3 4
–
+
+
U
B
1
–
–
+
U
B
2
3 4
+
+
VEGASWING 71A and 75A 11
Electrical connection
The transistor switches a second, galvanically isolated voltage source to the binary
input of a PLC or to an electrical load.
Mode A
For mode B you have to switch the polarity of
terminals 1 and 4.
U
B
1
NPN action PNP action
U
B
2
3 4
–
––
+
+
U
B
1
U
B
2
3 4
+
–
+
Control of alternating current loads
The transistor switches a galvanically separated alternating voltage 10 … 42 V AC to a
load.
Mode A
Contactless electrical switch
(SWING E72 C)
Power supply 20 … 250 V AC,
50/60 Hz or 20 … 250 V DC
(for further information see the following connection examples as well as the technical
data)
For direct control of relays, contactors, magnet valves, warning lights, horns etc. the
instrument must not be operated without
connected load (switching in series), as the
oscillator can be destroyed when connected
directly to mains. Not suitable for connection
to low voltage PLC inputs.
The domestic current is temporarily lowered
below 1 mA after switching off the load so
that contactors, the load current of which is
lower than the permanently flowing domestic
current of the electronics, are reliably
switched off.
A/B-mode
Mode A Mode B
Max. detection, Min. detection,
overfill protection dry run protection
U
B
123 4
+
U
B
1234
-
+
~
~
–
L1 N
1234
-
+
L1 N
In mode A, terminal 3 remains free. Therefore
Note
The transistor outputs of several VEGASWING 71A or 75A can be switched in series
do not connect a cable to terminal 3, not even
up to the next junction box, since the cable
can pick up interfering signals.
or in parallel to connect their signals logically.
The connection must be made such that
terminal 2 always has a higher voltage compared to terminal 3.
12 VEGASWING 71A and 75A
Setup
4 Setup
4.1 Switching status
The switching status can be checked with
closed instrument by means of the illuminated
ring in the upper part of the housing.
By interchanging of the connection cables,
you can modify the switching status of the
transistor output (T). For the electronics version contactless electronic switch (C) you
have to use a jumper in the plug between
terminal 2 and 3 to modify the switching status. You can adjust the requested mode acc.
to "4.3 Functions chart" (see "3.2 Connection
plan").
A = max. detection or overfill protection,
B = min. detection or dry run protection.
4.2 Switching point
The switching point of VEGASWING 71A and
75A is preadjusted and does not require
further modifications.
The statements on the position of the switching point (see also "2.1 Mounting instructions") relate to water (density 1.0 g/cm3). For
mediums with a different density, this switching point shifts, depending on the density
and the installation, in the direction of the
housing or tuning fork tip.
A density change of 0.1 g/cm3 results in a
shifting of the switching point by approx.
2.5 mm.
Switching point with
lower density
Switching point
Switching point with
higher density
25 mm
Fig. 4.1
4.3 Functions chart
The following chart provides an overview of the switching conditions dependent on the adjusted mode and level. To set the mode, please read the information in "3.2 Wiring plan".
Mode A Mode B Response Failure of the
Level
Transistor (T) conducts blocks conducts blocks blocks blocks
Contactless electrical
switch (C)
Signal lamp green red green red red
VEGASWING 71A and 75A 13
21
Switch Switch Switch Switch Switch Switch
closed open closed open open open
21
21
of the fault supply voltage
monitoring
individual individual
21 21
21
5 Diagnostics
5.1 Function test
VEGASWING 71A and 75A are equipped
with an integrated test switch which can be
activated magnetically. Proceed as follows to
test the instrument:
• Make sure that the tuning fork is uncov-
ered.
• Hold the test magnet (accessory) to the
magnet symbol on the instrument housing
(see fig. 5.1). The test magnet simulates a
covering of the tuning fork. If the tuning
fork is uncovered, the signal lamp of
VEGASWING changes status. The electronics and the switching output of VEGASWING are checked now.
Note that the connected instruments will be
activated during the test.
If, despite several tests with the test magnet,
VEGASWING 71A or 75A does not switch
over, check the plug connection and the
connection cable and test the instrument
again. If there is no switching function, the
electronics is defective. In this case you have
to replace the electronics (see "5.2 Replacement of electronics") or send the instrument
to our repair department.
Diagnostics
Note:
It is absolutely necessary that you remove
the test magnet after the test from the instrument housing.
Fig. 5.1
14 VEGASWING 71A and 75A
Diagnostics
5.2 Replacement of the electronics
The removal of the electronics unit will damage the housing seal. Therefore only open
the instrument if you want to insert a new
electronics unit.
To replace the electronics in case of failure,
the instrument must not be removed. Proceed as follows to replace the electronics
unit:
• Separate VEGASWING from operating
voltage.
• Loosen the plug (1), by screwing on the
knurled ring.
• Loosen the plug insert (2) with a screwdriver on the four slots (10) and pull it carefully out of the housing (6).
• Remove the plug of the two connection
cables (7) from the socket on the board
(8).
• Grease (thin layer) the seal ring (4) of the
new plug insert with an acid-free grease.
• Insert the connection cables (7) into socket
(8) on the board of the new oscillator.
• Lower the plug insert (2) into the housing.
Make sure that the locking tab (3) is approximately above the notch on the housing edge (5).
• Carefully push the plug insert (2) from
above into the housing (6). Push the four
snap-on hooks (9) with a screwdriver
inwards so that the plug insert can be
more easily inserted into the housing. Make
sure that the board does not get damaged.
• Push the plug insert (2) flush to the housing (6). Make sure that the locking tab (3)
snaps into the notch on the housing (5).
You can hear it when the snap-on hooks
(9) snap in the groove inside the housing.
It is not possible to loosen the parts without
damage.
• Now screw the plug (1) back onto the
housing.
1Plug
2 Plug insert
3 Locking tab
4 Seal ring
5 Notch
6 Housing
7 Connection plug
8 Socket
9 Snap-on hooks (4 pcs.)
10 Slots (4 pcs.)
Fig. 5.2
VEGASWING is again ready for use.
Note that the switching point may change
slightly because of the electronics replacement.
VEGASWING 71A and 75A 15
5.3 Maintenance
VEGASWING 71A and 75A are maintenancefree.
VEGA Grieshaber KG
Am Hohenstein 113
D-77761 Schiltach
Phone (0 78 36) 50 - 0
Fax (0 78 36) 50 - 201
E-mail info@de.vega.com
www.vega.com
ISO 9001
All statements concerning scope of delivery, application, practical
use and operating conditions of the sensors and processing systems correspond to the latest information at the time of printing.
Technical data subject to alterations
17783-EN-030715
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