Vega VEGABAR 86 User manual

Operating Instructions
Submersible pressure transmitter with
ceramic measuring cell
VEGABAR 86
Foundation Fieldbus
Document ID: 45043

2
Contents
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
Contents
1 Zu diesem Dokument............................................................................................................... 4
1.1 Funktion ........................................................................................................................... 4
1.2 Zielgruppe........................................................................................................................ 4
1.3 Verwendete Symbolik....................................................................................................... 4
2 For your safety ......................................................................................................................... 5
2.1 Authorised personnel ....................................................................................................... 5
2.2 Appropriate use................................................................................................................ 5
2.3 Warning about incorrect use............................................................................................. 5
2.4 General safety instructions............................................................................................... 5
2.5 EU conformity................................................................................................................... 5
2.6 NAMUR recommendations .............................................................................................. 6
2.7 Installation and operation in the USA and Canada ........................................................... 6
2.8 Environmental instructions ............................................................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Packaging, transport and storage................................................................................... 11
3.4 Accessories.................................................................................................................... 12
4 Mounting................................................................................................................................. 13
4.1 General instructions ....................................................................................................... 13
4.2 Ventilation and pressure compensation.......................................................................... 15
4.3 Level measurement........................................................................................................ 18
4.4 External housing ............................................................................................................ 18
5 Connecting to the bus system.............................................................................................. 19
5.1 Preparing the connection ............................................................................................... 19
5.2 Connecting..................................................................................................................... 20
5.3 Single chamber housing................................................................................................. 21
5.4 Double chamber housing ............................................................................................... 21
5.5 Double chamber housing with VEGADIS-Adapter.......................................................... 23
5.6 Housing IP66/IP68 (1 bar) .............................................................................................. 24
5.7 External housing with version IP68 (25 bar) ................................................................... 24
5.8 Switch-on phase............................................................................................................. 26
6 Set up with the display and adjustment module ................................................................ 27
6.1 Insert display and adjustment module............................................................................ 27
6.2 Adjustment system......................................................................................................... 28
6.3 Measured value indication.............................................................................................. 29
6.4 Parameter adjustment - Quick setup .............................................................................. 30
6.5 Parameter adjustment - Extended adjustment................................................................ 30
6.6 Menu overview ............................................................................................................... 40
6.7 Saving the parameterisation data................................................................................... 42
7 Setup with PACTware............................................................................................................. 43
7.1 Connect the PC.............................................................................................................. 43
7.2 Parameter adjustment with PACTware............................................................................ 43
7.3 Saving the parameterisation data................................................................................... 44
8 Set up with other systems .................................................................................................... 45

3
Contents
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
8.1 DD adjustment programs ............................................................................................... 45
9 Diagnosis, asset management and service ........................................................................ 46
9.1 Maintenance .................................................................................................................. 46
9.2 Diagnosis memory ......................................................................................................... 46
9.3 Asset Management function........................................................................................... 47
9.4 Rectify faults................................................................................................................... 50
9.5 Exchange process module on version IP68 (25 bar) ...................................................... 50
9.6 Exchanging the electronics module................................................................................ 51
9.7 Software update ............................................................................................................. 52
9.8 How to proceed if a repair is necessary.......................................................................... 52
10 Dismount................................................................................................................................. 53
10.1 Dismounting steps.......................................................................................................... 53
10.2 Disposal ......................................................................................................................... 53
11 Supplement ............................................................................................................................ 54
11.1 Technical data ................................................................................................................ 54
11.2 Device communication Foundation Fieldbus.................................................................. 64
11.3 Calculation of the total deviation..................................................................................... 65
11.4 Practical example........................................................................................................... 66
11.5 Dimensions .................................................................................................................... 68
11.6 Gewerbliche Schutzrechte ............................................................................................. 79
11.7 Trademark ...................................................................................................................... 79
Safety instructions for Ex areas
TakenoteoftheExspecicsafetyinstructionsforExapplications.
These instructions are attached as documents to each instrument
with Ex approval and are part of the operating instructions.
Editing status: 2021-03-31

4
1 Zu diesem Dokument
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1 Zu diesem Dokument
1.1 Funktion
Die vorliegende Anleitung liefert Ihnen die erforderlichen Informa-
tionen für Montage, Anschluss und Inbetriebnahme sowie wichtige
Hinweise für Wartung, Störungsbeseitigung, den Austausch von
Teilen und die Sicherheit des Anwenders. Lesen Sie diese deshalb
vor der Inbetriebnahme und bewahren Sie sie als Produktbestandteil
in unmittelbarer Nähe des Gerätes jederzeit zugänglich auf.
1.2 Zielgruppe
Diese Betriebsanleitung richtet sich an ausgebildetes Fachpersonal.
Der Inhalt dieser Anleitung muss dem Fachpersonal zugänglich
gemacht und umgesetzt werden.
1.3 Verwendete Symbolik
Document ID
Dieses Symbol auf der Titelseite dieser Anleitung weist auf die Docu-
ment ID hin. Durch Eingabe der Document ID auf www.vega.com
kommen Sie zum Dokumenten-Download.
Information, Hinweis, Tipp: Dieses Symbol kennzeichnet hilfreiche
Zusatzinformationen und Tipps für erfolgreiches Arbeiten.
Hinweis: Dieses Symbol kennzeichnet Hinweise zur Vermeidung von
Störungen, Fehlfunktionen, Geräte- oder Anlagenschäden.
Vorsicht: Nichtbeachten der mit diesem Symbol gekennzeichneten
Informationen kann einen Personenschaden zur Folge haben.
Warnung: Nichtbeachten der mit diesem Symbol gekennzeichneten
Informationen kann einen ernsthaften oder tödlichen Personen-
schaden zur Folge haben.
Gefahr: Nichtbeachten der mit diesem Symbol gekennzeichneten In-
formationen wird einen ernsthaften oder tödlichen Personenschaden
zur Folge haben.
Ex-Anwendungen
Dieses Symbol kennzeichnet besondere Hinweise für Ex-Anwendun-
gen.
• Liste
Der vorangestellte Punkt kennzeichnet eine Liste ohne zwingende
Reihenfolge.
1 Handlungsfolge
Vorangestellte Zahlen kennzeichnen aufeinander folgende Hand-
lungsschritte.
Batterieentsorgung
Dieses Symbol kennzeichnet besondere Hinweise zur Entsorgung
von Batterien und Akkus.

5
2 For your safety
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
2 For your safety
2.1 Authorised personnel
All operations described in this documentation must be carried out
onlybytrained,qualiedpersonnelauthorisedbytheplantoperator.
During work on and with the device, the required personal protective
equipment must always be worn.
2.2 Appropriate use
Model VEGABAR 86 is a pressure transmitter for level and gauge
measurement.
Youcannddetailedinformationabouttheareaofapplicationin
chapter " Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of this product can give rise to applica-
tion-specichazards,e.g.vesseloverllthroughincorrectmounting
or adjustment. Damage to property and persons or environmental
contamination can result. Also, the protective characteristics of the
instrument can be impaired.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and directives.The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsi-
ble for the trouble-free operation of the instrument. When measuring
aggressive or corrosive media that can cause a dangerous situation
if the instrument malfunctions, the operator has to implement suitable
measures to make sure the instrument is functioning properly.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.Forsafety
reasons,onlytheaccessoryspeciedbythemanufacturermustbe
used.
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed.
2.5 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUdirec-
tives.ByaxingtheCEmarking,weconrmtheconformityofthe
instrument with these directives.

6
2 For your safety
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
The EU conformity declaration can be found on our homepage.
2.6 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany. The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefullstherequirementsofthefollowingNAMURrecom-
mendations:
• NE 21 – Electromagnetic compatibility of equipment
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
• NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.7 Installation and operation in the USA and
Canada
This information is only valid for USA and Canada. Hence the follow-
ing text is only available in the English language.
Installations in the US shall comply with the relevant requirements of
the National Electrical Code (ANSI/NFPA 70).
Installations in Canada shall comply with the relevant requirements of
the Canadian Electrical Code.
2.8 Environmental instructions
Protection of the environment is one of our most important duties.
That is why we have introduced an environment management system
with the goal of continuously improving company environmental pro-
tection.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfullthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter "Packaging, transport and storage"
• Chapter "Disposal"

7
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• VEGABAR 86 pressure transmitter
• Ventilation valves, closing screws – depending on version (see
chapter "Dimensions")
The further scope of delivery encompasses:
• Documentation
– Quick setup guide VEGABAR 86
– Testcerticateforpressuretransmitters
– Instructions for optional instrument features
– Ex-specic"Safety instructions" (with Ex versions)
– Ifnecessary,furthercerticates
Information:
Optional instrument features are also described in this operating
instructions manual.The respective scope of delivery results from the
orderspecication.
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software version from 1.2.0
Note:
Youcanndthehardwareandsoftwareversionoftheinstrumentas
follows:
• On the type plate of the electronics module
• In the adjustment menu under "Info"
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
Scope of delivery
Scope of this operating
instructions
Type label

8
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
7
6
4
5
2
3
1
Fig. 1: Layout of the type label (example)
1 Product code
2 Field for approvals
3 Technical data
4 Serial number of the instrument
5 QR code
6 Symbol of the device protection class
7 ID numbers, instrument documentation
The type label contains the serial number of the instrument. With it
youcanndthefollowinginstrumentdataonourhomepage:
• Product code (HTML)
• Delivery date (HTML)
• Order-specicinstrumentfeatures(HTML)
• Operating instructions and quick setup guide at the time of ship-
ment (PDF)
• Order-specicsensordataforanelectronicsexchange(XML)
• Testcerticate(PDF)-optional
Move to "www.vega.com"andenterinthesearcheldtheserial
number of your instrument.
Alternatively, you can access the data via your smartphone:
• Download the VEGA Tools app from the "Apple App Store" or the
"Google Play Store"
• Scan the DataMatrix code on the type label of the instrument or
• Enter the serial number manually in the app
3.2 Principle of operation
The VEGABAR 86 is suitable for the measurement of the following
process variables:
• Level
Serial number - Instru-
ment search
Measured variables

9
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
Fig. 2: Level measurement with VEGABAR 86
Depending on the version, the VEGABAR 86 is also suitable for
electronicdierentialpressuremeasurement.Forthis,theinstrument
is combined with a Secondary Device.
Fig. 3: Electronic dierential pressure measurement via a Primary/Secondary
combination
Youcannddetailedinformationintheoperatinginstructionsofthe
respective Secondary Device.
The VEGABAR 86 is a submersible pressure transmitter for level
measurementinwells,basinsandopenvessels.Itsgreatexibility
Electronicdierential
pressure
Application area

10
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
throughdierentcableandtubeversionsallowstheinstrumenttobe
usedinmanydierentapplications.
Measured products are liquids.
Depending on the instrument version and measurement setup, meas-
ured products can also be viscous or contain abrasive substances.
The sensor element is the CERTEC®measuring cell with robust
ceramicdiaphragm.Theprocesspressuredeectstheceramic
diaphragm and causes a capacitance change in the measuring cell.
This capacitance change is converted into an electrical signal and
outputted as measured value via the output signal.
The measuring cell is available in two sizes:
• CERTEC®(ø 28 mm) with sensor 32 mm
• Mini-CERTEC®(ø 17.5 mm) with sensor 22 mm
A temperature sensor in the ceramic diaphragm of the CERTEC®or
on the ceramic base of the Mini-CERTEC®measuring cell detects the
actual process temperature.The temperature value is output via:
• The display and adjustment module
• The current output or the additional current output
• The digital signal output
Even extreme jumps in process temperature are immediately de-
tected by the CERTEC®measuring cell. The values in the ceramic
diaphragm are compared with those on the ceramic base body. Within
a few measuring cycles, the intelligent sensor electronics compen-
sates for otherwise unavoidable measurement deviations caused by
temperature shocks in the range. Depending on the adjusted damp-
ing, these cause only slight and brief changes in the output signal.
The measuring cell design depends on the selected pressure type.
Relative pressure: the measuring cell is open to the atmosphere.
The ambient pressure is detected in the measuring cell and compen-
sated.Itthushasnoinuenceonthemeasuredvalue.
Absolute pressure: the measuring cell contains vacuum and is
encapsulated. The ambient pressure is not compensated and does
henceinuencethemeasuredvalue.
Relative pressure, climate-compensated: the measuring cell is
evacuated and encapsulated. The ambient pressure is detected
through a reference sensor in the electronics and compensated. It
thushasnoinuenceonthemeasuredvalue.
The following illustration shows the installation of the ceramic measur-
ing cell in the sensor as well as the sealing concept.
Measured products
Measuring system pres-
sure
Measuring system tem-
perature
Pressure types
Seal concept

11
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1
2
3
4
5
Fig. 4: Front-ush installation of the ceramic measuring cell with double seal
1 Housing, sensor
2 Measuring cell
3 Lateral seal for measuring cell
4 Additional, front seal for measuring cell
5 Diaphragm
3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging consists of environment-friendly, recyclable card-
board. For special versions, PE foam or PE foil is also used. Dispose
of the packaging material via specialised recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Lifting and carrying

12
3 Product description
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
3.4 Accessories
The instructions for the listed accessories can be found in the down-
load area on our homepage.
The display and adjustment module is used for measured value indi-
cation, adjustment and diagnosis.
The integrated Bluetooth module (optional) enables wireless adjust-
ment via standard adjustment devices.
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC.
Secondary sensors of VEGABAR series 80 enable in conjunction with
VEGABAR86anelectronicdierentialpressuremeasurement.
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
The VEGADIS adapter is an accessory part for sensors with double
chamber housings. It enables the connection of VEGADIS 81 to the
sensor housing via an M12 x 1 plug.
The overvoltage arrester B81-35 is used instead of the terminals in
the single or double chamber housing.
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
Screwedangesareavailableindierentversionsaccordingtothe
following standards: DIN 2501, EN 1092-1, BS 10, ASME B 16.5,
JIS B 2210-1984, GOST 12821-80.
Welded sockets are used to connect the devices to the process,
threaded and hygienic adapters for easy adaptation of devices with
standardthreadedttings,e.g.tohygienicconnectionsonthepro-
cess side.
PLICSCOM
VEGACONNECT
Secondary sensors
VEGADIS 81
VEGADIS adapter
Overvoltage protection
Protective cover
Flanges
Welded socket, threaded
and hygienic adapter

13
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
4 Mounting
4.1 General instructions
Note:
For safety reasons, the instrument must only be operated within the
permissibleprocessconditions.Youcannddetailedinformationon
the process conditions in chapter "Technical data" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts of the instrument ex-
posed to the process are suitable for the existing process conditions.
These are mainly:
• Active measuring component
• Processtting
• Process seal
Process conditions in particular are:
• Process pressure
• Process temperature
• Chemical properties of the medium
• Abrasionandmechanicalinuences
Protect your instrument against moisture ingress through the following
measures:
• Use a suitable connection cable (see chapter "Connecting to
power supply")
• Tighten the cable gland or plug connector
• Lead the connection cable downward in front of the cable entry or
plug connector
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Note:
Make sure that during installation or maintenance no moisture or dirt
can get inside the instrument.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Deviceswiththreadedttingarescrewedintotheprocessttingwith
a suitable wrench via the hexagon.
See chapter "Dimensions" for wrench size.
Warning:
The housing or the electrical connection may not be used for screw-
ing in! Depending on the device version, tightening can cause dam-
age, e. g. to the rotation mechanism of the housing.
Avoid damages on the device by lateral forces, for example by vibra-
tions.Itisthusrecommendedtoxthedeviceswithprocesstting
Process conditions
Protection against mois-
ture
Screwing in
Vibrations

14
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
thread G½ of plastic at the installation site via a suitable measuring
instrument holder.
If there is strong vibration at the mounting location, the instrument
version with external housing should be used. See chapter "External
housing".
Thepermissibleprocesspressurerangeisspeciedonthetypelabel
with "MWP" (Maximum Working Pressure), see chapter "Congura-
tion".This applies even if a measuring cell with a measuring range
(order-related) higher than the permissible pressure range of the
processttingisinstalled.
Inaddition,atemperaturederatingoftheprocesstting,e.g.with
anges,canlimitthepermissibleprocesspressurerangeaccording
to the respective standard.
The permissible process pressure range is stated on the type label.
The instrument should only be operated with these pressures if the
mountingaccessoryusedalsofullsthesevalues.Thisshouldbeen-
suredbysuitableanges,weldedsockets,tensionringswithClamp
connections, sealings, etc.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter "Technical data" for the environment of the electronics hous-
ing and connection cable are not exceeded.
2
1
Fig. 5: Temperature ranges
1 Process temperature
2 Ambient temperature
Depending on the transmitter, the VEGABAR 86 is supplied with a
protective cap or a transport and mounting protection.
Permissible process
pressure (MWP) - Device
Permissible process
pressure (MWP) - Mount-
ing accessory
Temperature limits
Transport and mounting
protection

15
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1
2
Fig. 6: VEGABAR 86, transport and mounting protection
1 Transmitter
2 Transport and mounting protection
Remove this protection after mounting and before setting up the
instrument.
In case of slightly contaminated measured media, the transport and
mounting protection can remain on the instrument as an impact pro-
tection during operation.
4.2 Ventilation and pressure compensation
Thelterelementintheelectronicshousinghasthefollowingfunc-
tions:
• Ventilation of the electronics housing
• Atmospheric pressure compensation (with relative pressure meas-
uring ranges)
Caution:
Thelterelementcausesatime-delayedpressurecompensation.
When quickly opening/closing the housing cover, the measured value
can change for approx. 5 s by up to 15 mbar.
Foraneectiveventilation,thelterelementmustbealwaysfreefrom
buildup. In case of horizontal mounting, turn the housing so that the
lterelementpointsdownwardaftertheinstrumentisinstalled.This
provides better protection against buildup.
Caution:
Donotuseahigh-pressurecleaner.Thelterelementcouldbedam-
aged, which would allow moisture into the housing.
Thefollowingparagraphsdescribehowthelterelementisarranged
inthedierentinstrumentversions.
Filter element - Function

16
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1 2 3
6
6
6 6
6
5
4
Fig. 7: Position of the lter element
1 Plastic, stainless steel single chamber (precision casting)
2 Aluminium - single chamber
3 Stainless steel single chamber (electropolished)
4 Plastic double chamber
5 Aluminium, stainless steel double chamber housing (precision casting)
6 Filter element
With the following instruments a blind plug is installed instead of the
lterelement:
• Instruments in protection IP66/IP68 (1 bar) - ventilation via capillar-
ies in non-detachable cable
• Instruments with absolute pressure
→ Turnthemetalringinsuchawaythatthelterelementpoints
downward after installation of the instrument.This provides better
protection against buildup.
Filter element - Position
Filter element - Position
Ex-d version

17
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1
2
Fig. 8: Position of the lter element - Ex-d version
1 Rotatable metal ring
2 Filter element
With absolute pressure measuring ranges, a blind plug is used
insteadofthelterelement.
The Second Line of Defense (SLOD) is a second level of the process
separation in form of a gas-tight leadthrough in the housing neck,
preventing products from penetrating into the housing.
With these instruments, the process assembly is completely en-
capsulated. An absolute pressure measuring cell is used so that no
ventilation is required.
With relative pressure measuring ranges, the ambient pressure is
detected and compensated by a reference sensor in the electronics.
1
2
1
2
Fig. 9: Position of the lter element - gastight leadthrough
1 Filter element
2 Gas-tight leadthrough
Filter element - Position
Second Line of Defense

18
4 Mounting
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
1
Fig. 10: Position of the lter element - IP69K version
1 Filter element
Instruments with absolute pressure have a blind plug mounted
insteadofthelterelement.
4.3 Level measurement
Keep the following in mind when setting up the measuring system:
• Donotmounttheinstrumentclosetothellingstreamoremptying
area
• Mount the instrument so that it is protected against pressure
shocks from the stirrer
4.4 External housing
1
2
3
4
Fig. 11: Arrangement measurement loop, external housing
1 Sensor
2 Connection cable sensor, external housing
3 External housing
4 Signal cable
Filter element - Position
IP69K version
Measurement setup
Conguration

19
5 Connecting to the bus system
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
5 Connecting to the bus system
5.1 Preparing the connection
Always keep in mind the following safety instructions:
• Carryoutelectricalconnectionbytrained,qualiedpersonnel
authorised by the plant operator
• If overvoltage surges are expected, overvoltage arresters should
be installed
Warning:
Only connect or disconnect in de-energized state.
The instrument requires a operating voltage of 9 … 32 V DC. Operat-
ing voltage and the digital bus signal are carried on the same two-wire
connection cable. Power is supplied via the H1 power supply.
Connection is carried out with shielded cable according to Fieldbus
specication.
Use cable with round cross section for instruments with housing and
cablegland.Toensurethesealeectofthecablegland(IPprotection
rating),ndoutwhichcableouterdiameterthecableglandissuitable
for.
Useacableglandttingthecablediameter.
Make sure that the entire installation is carried out according to the
Fieldbusspecication.Inparticular,makesurethatthebusistermi-
nated with suitable terminating resistors.
Make sure that the cable screen and grounding are carried out ac-
cordingtoFieldbusspecication.Werecommendtoconnectthe
cable screening to ground potential on both ends.
In systems with potential equalisation, connect the cable screening
directly to ground potential at the power supply unit, in the connection
box and at the sensor.The screen in the sensor must be connected
directly to the internal ground terminal.The ground terminal outside
on the housing must be connected to the potential equalisation (low
impedance).
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
Note:
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Safety instructions
Voltage supply
Connection cable
Cable screening and
grounding
Cable glands

20
5 Connecting to the bus system
VEGABAR 86 • Foundation Fieldbus
45043-EN-210430
Note:
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
On plastic housings, the NPT cable gland or the Conduit steel tube
must be screwed into the threaded insert without grease.
Max. torque for all housings, see chapter "Technical data".
5.2 Connecting
The voltage supply and signal output are connected via the spring-
loaded terminals in the housing.
Connection to the display and adjustment module or to the interface
adapter is carried out via contact pins in the housing.
Information:
The terminal block is pluggable and can be removed from the
electronics.To do this, lift the terminal block with a small screwdriver
and pull it out. When reinserting the terminal block, you should hear it
snap in.
Proceed as follows:
1. Unscrew the housing lid
2. If a display and adjustment module is installed, remove it by turn-
ing it slightly to the left
3. Loosen compression nut of the cable gland and remove blind
plug
4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of the individual wires
5. Insert the cable into the sensor through the cable entry
1 2
Fig. 12: Connection steps 5 and 6
1 Single chamber housing
2 Double chamber housing
6. Insert the wire ends into the terminals according to the wiring plan
Note:
Solidcoresaswellasexiblecoreswithwireendsleevesareinsert-
eddirectlyintotheterminalopenings.Incaseofexiblecoreswithout
end sleeves, press the terminal from above with a small screwdriver,
the terminal opening is then free.When the screwdriver is released,
the terminal closes again.
Connection technology
Connection procedure