Vega VEGABAR 54 User manual

Operating Instructions
Pressure transmitter with MINI-CERTEC®
measuring cell
VEGABAR 54
Foundation Fieldbus - climate compensated
Document ID: 36791

2
Contents
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
Contents
1 About this document
1.1 Function ........................................................................................................................... 4
1.2 Target group ..................................................................................................................... 4
1.3 Symbols used................................................................................................................... 4
2 For your safety
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 Safety label on the instrument .......................................................................................... 6
2.6 CE conformity................................................................................................................... 6
2.7 Measuring range - permissible process pressure............................................................. 6
2.8 FulllmentofNAMURrecommendations ......................................................................... 6
2.9 Safety instructions for Ex areas ........................................................................................ 6
2.10 Environmental instructions ............................................................................................... 6
3 Product description
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 9
3.3 Operation ....................................................................................................................... 10
3.4 Packaging, transport and storage................................................................................... 11
3.5 Accessories and replacement parts ............................................................................... 11
4 Mounting
4.1 General instructions ....................................................................................................... 13
4.2 Mounting steps............................................................................................................... 15
4.3 Mounting steps, external housing................................................................................... 15
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 16
5.2 Connection procedure.................................................................................................... 17
5.3 Wiring plan, single chamber housing.............................................................................. 19
5.4 Wiring plan, double chamber housing ............................................................................ 20
5.5 Wiring plan - version IP 66/IP 68, 1 bar........................................................................... 21
5.6 Wiring plan, external housing with version IP 68............................................................. 22
5.7 Switch-on phase............................................................................................................. 23
6 Set up with the display and adjustment module PLICSCOM
6.1 Short description ............................................................................................................ 25
6.2 Insert display and adjustment module............................................................................ 25
6.3 Adjustment system......................................................................................................... 26
6.4 Setup steps .................................................................................................................... 27
6.5 Menu schematic............................................................................................................. 35
6.10 Saving the parameter adjustment data........................................................................... 37
7 Set up with PACTware and other adjustment programs
7.1 Connect the PC.............................................................................................................. 38
7.2 Parameter adjustment with PACTware............................................................................ 39
7.3 Parameter adjustment with AMS™................................................................................. 39
7.4 Saving the parameter adjustment data........................................................................... 39

3
Contents
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
8 Maintenanceandfaultrectication
8.1 Maintenance .................................................................................................................. 40
8.2 Rectify faults................................................................................................................... 40
8.3 Calculation of total deviation (according to DIN 16086).................................................. 41
8.4 Exchanging the electronics module................................................................................ 43
8.5 Software update ............................................................................................................. 43
8.6 How to proceed if a repair is needed.............................................................................. 44
9 Dismounting
9.1 Dismounting steps.......................................................................................................... 45
9.2 Disposal ......................................................................................................................... 45
10 Supplement
10.1 Technical data ................................................................................................................ 46
10.2 Information on Foundation Fieldbus ............................................................................... 55
10.3 Dimensions .................................................................................................................... 58
Supplementary documentation
Information:
Supplementary documents appropriate to the ordered version come
withthedelivery.Youcanndthemlistedinchapter"Product descrip-
tion".
Editing status: 2014-04-24

4
1 About this document
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
1 About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important instruc-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
tion before putting the instrument into operation and keep this manual
accessible in the immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained specialist
personnel.The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbols used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
SIL applications
This symbol indicates instructions for functional safety which must be
particularly taken into account for safety-relevant applications.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

5
2 For your safety
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist 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
VEGABAR 54 is a pressure transmitter for measurement of gauge
pressure and vacuum.
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.
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.
2.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and guidelines. The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsible
for the trouble-free operation of the instrument.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
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.
The safety approval markings and safety tips on the device must also
be observed.

6
2 For your safety
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
2.6 CE conformity
ThisdevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByattachingtheCEmark,VEGAprovidesaconrmationof
successfultesting.YoucanndtheCEconformitydeclarationinthe
downloadareaof"www.vega.com".
2.7 Measuring range - permissible process
pressure
Due to the application, a measuring cell with a measuring range
higherthanthepermissiblepressurerangeoftheprocessttingmay
have been integrated.The permissible process pressure is stated with
"Processpressure"onthetypelabel,seechapter3.1"Conguration".
For safety reasons, this range must not be exceeded.
2.8 FulllmentofNAMURrecommendations
Withrespecttocompatibility,theNAMURrecommendationNE53is
fullled.Thisappliesalsotothecorrespondingdisplayandadjust-
ment components.VEGA instruments are generally upward and
downward compatible.
• Sensor software for DTM VEGABAR 54 HART, PA or FF
• DTM VEGABAR 54 for adjustment software PACTware
• Display and adjustment module for sensor software
The parameter adjustment of the basic sensor functions is independ-
ent of the software version. The range of available functions depends
on the respective software version of the individual components.
2.9 Safety instructions for Ex areas
PleasenotetheEx-specicsafetyinformationforinstallationandop-
eration in Ex areas. These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.
2.10 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llthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter"Packaging, transport and storage"
• Chapter"Disposal"

7
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• VEGABAR 54 pressure transmitter
• Documentation
– this operating instructions manual
– Testcerticateforpressuretransmitters
– Testcerticate
– Exspecicsafetyinstructions(withExversions),ifnecessary
furthercerticates
– Operatinginstructionsmanual27835"Display and adjustment
module PLICSCOM"(optional)
– Supplementaryinstructionsmanual31708"Heating for display
and adjustment module"(optional)
– Supplementaryinstructionsmanual"Plug connector for con-
tinuously measuring sensors"(optional)
The VEGABAR 54 consists of the components:
• Processttingwithmeasuringcell
• Housing with electronics, optionally available with plug connector
• Housing cover, optionally available with display and adjustment
module
Thecomponentsareavailableindierentversions.
Scope of delivery
Constituent parts

8
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
1
2
3
Fig. 1: Example of a VEGABAR 54 with process tting G1 A and plastic housing
1 Housing cover with integrated PLICSCOM (optional)
2 Housing with electronics
3 Process tting with measuring cell
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
Type label

9
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
2
1
13
10
5
4
3
6
7
8
9
11
12
14
Fig. 2: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Measuring range
5 Process pressure
6 Process temperature
7 Electronics, voltage supply
8 Protection rating
9 Order number
10 Serial number
11 Data-Matrix-Code for Smartphone-App
12 Material, process seal
13 ID numbers, instrument documentation
14 Notied authority for CE marking
With the serial number, you can access the delivery data of the instru-
ment via www.vega.com,"VEGA Tools"and"serial number search".
Inadditiontothetypelabeloutside,youcanalsondtheserialnum-
ber on the inside of the instrument.
This operating instructions manual applies to the following instrument
versions:
• Software from 3.82
3.2 Principle of operation
VEGABAR 54 - climate compensated is a pressure transmitter for use
in the paper and food processing industries as well as in water/waste
waterapplicationsunderdicultconditions(coldmediumandwarm,
humid environment).
Depending on the version, the pressure transmitter is used for meas-
urement of level, gauge pressure or vacuum. Measured products
are gases, vapours and liquids, including those containing abrasive
substances.
The sensor element is an encapsulated CERTEC®absolute pressure
measuringcellwithrobust,front-ush(dependingontheprocess
tting),abrasionresistantceramicdiaphragm.Theprocesspressure
causes a capacitance change in the measuring cell via the ceramic
Scope of this operating
instructions manual
Application area
Functional principle

10
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
diaphragm.This capacitance change is converted into an electrical
signal, compared with an integrated reference pressure measurement
and outputted as measured value via the output signal.
The CERTEC®measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the display and
adjustment module or processed via the signal output.
As a standard feature, the CERTEC®measuring cell is equipped with
a lateral, recessed seal.
Instruments with double seal have an additional front seal.
Instrumentswithhygienicttingareequippedwithagap-freeform
seal.
Power is supplied via the H1 Fieldbus. A two-wire cable according to
Fieldbusspecicationservesascarrierofbothpoweranddigitaldata
for multiple sensors. This cable can be operated in two versions:
• via an H1 interface card in the control system and additional power
supply
• via a Linking device with HSE (High speed Ethernet) and addi-
tional power supply according to IEC 61158-2
TheDD(DeviceDescriptions)andCFF(capabilityles)necessary
forplanningandcongurationofyourFF(FoundationFieldbus)com-
munication network are available in the download area of the VEGA
homepage www.vega.comunder"Services - Downloads - Software
- Foundation Fieldbus".Theappropriatecerticatesarealsoavailable
there.ACDwiththeappropriatelesandcerticatescanbeordered
via e-mail under [e-mail] or by phone from one of the
VEGAagenciesundertheordernumber"DRIVER.S".
The backlight of the display and adjustment module is powered by the
sensor. Prerequisite is a certain level of operating voltage.
Thedataforpowersupplyarespeciedinchapter"Technical data".
Theoptionalheatingrequiresitsownoperatingvoltage.Youcannd
detailsinthesupplementaryinstructionsmanual"Heating for display
and adjustment module".
This function is generally not available for approved instruments.
3.3 Operation
The instrument can be adjusted with the following adjustment media:
• With the display and adjustment module
• with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
• acongurationtool
Seal concept
Power supply and bus
communication
DD/CFF

11
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
3.4 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 of standard instruments consists of environment-
friendly, recyclable cardboard. 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 %
3.5 Accessories and replacement parts
The display and adjustment module PLICSCOM is used for measured
value indication, adjustment and diagnosis. It can be inserted into the
sensor and removed at any time.
Youcanndfurtherinformationintheoperatinginstructions"Display
and adjustment module PLICSCOM"(Document-ID27835).
The interface adapter VEGACONNECT 4 enables the connection of
communication-capableinstrumentstotheUSBinterfaceofaPC.For
parameter adjustment of these instruments, an adjustment software
such as PACTware with VEGA-DTM is required.
Youcanndfurtherinformationintheoperatinginstructions"Interface
adapter VEGACONNECT"(Document-ID32628).
VEGADIS 61 is suitable for external measured value indication and
adjustment of plics® sensors. It is connected to the sensor with an up
to 25 m long, four-wire, screened standard cable.
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Display and adjustment
module
Interface adapter
External display and
adjustment unit

12
3 Product description
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
Youcanndfurtherinformationintheoperatinginstructions"VE-
GADIS 61"(Document-ID27720).
Flangesareavailableindierentversionsaccordingtothefollowing
standards: DIN 2501, EN 1092-1, ANSI B 16.5, JIS B 2210-1984,
GOST 12821-80.
Youcanndadditionalinformationinthesupplementaryinstructions
manual"Flanges according to DIN-EN-ASME-JIS"(Document-ID
31088).
The measuring instrument holder is used for wall/tube mounting of
VEGABAR series 80 pressure transmitters and VEGAWELL 52 sub-
mersible pressure transmitters. Supplied reducers enable the adapta-
tiontodierentinstrumentdiameters.Thematerialusedis316L.
Youcanndadditionalinformationintheoperatinginstructions
"Mounting accessory pressure"(Document-ID43478).
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
Youwillndadditionalinformationinthesupplementaryinstructions
manual"Protective cover"(Document-ID34296).
The electronics module is a replacement part for pressure transmitter
VEGABAR. One version is available for each type of signal output.
Youndfurtherinformationintheoperatinginstructions"Electronics
module VEGABAR series 50 and 60 "(Document-ID30175).
Flanges
Measuring instrument
holder
Protective cap
Electronics module

13
4 Mounting
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
4 Mounting
4.1 General instructions
Make sure that all parts of the instrument coming in direct contact
with the process, especially the sensor element, process seal and
processtting,aresuitablefortheexistingprocessconditions,such
as process pressure, process temperature as well as the chemical
properties of the medium.
Youcanndthespecicationsinchapter"Technical data"andonthe
nameplate.
Select an installation position you can easily reach for mounting and
connectingaswellaslaterretrottingofadisplayandadjustment
module.The housing can be rotated by 330° without the use of any
tools.You can also install the display and adjustment module in four
dierentpositions(eachdisplacedby90°).
Usetherecommendedcables(seechapter"Connecting to power
supply")andtightenthecablegland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cableentry.Rainandcondensationwatercanthusdraino.Thisap-
plies mainly to outdoor mounting as well as installation in areas where
high humidity is expected (e.g. through cleaning processes) or on
cooled or heated vessels.
Fig. 3: Measures against moisture penetration
The ventilation of the electronics housing as well as the atmospheric
pressurecompensationforthemeasuringcellarerealisedviaalter
element in the area of the cable gland.
Suitability for the process
conditions
Installation position
Moisture
Ventilation and pressure
compensation

14
4 Mounting
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
2
1
2
1
2
1
1
2
Fig. 4: Position of the lter element
1 Filter element
2 Blind plug
Caution:
Duetotheltereect,thepressurecompensationistimedelayed.
When opening/closing the housing cover quickly, the measured value
can change for a period of approx. 5 s by up to 15 mbar.
Information:
Makesurethatthelterelementisalwaysfreeofbuildupduring
operation. A high-pressure cleaner may not be used for cleaning.
With instrument versions in protection IP 66/IP 68, 1 bar, the ventila-
tion is realised via the capillaries in the permanently connected cable.
Thelterelementisreplacedbyablindplug.
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.
1
2
Fig. 5: Temperature ranges
1 Process temperature
2 Ambient temperature
Temperature limits

15
4 Mounting
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
4.2 Mounting steps
FormountingVEGABAR54,aweldedsocketisrequired.Youcannd
thesecomponentsinthesupplementaryinstructionsmanual"Welded
socket and seals".
Usethesealttingbelongingtotheinstrument,orincaseofNPT
connections, a high-resistance sealing material.
→ Screw VEGABAR 54 into the welded socket.Tighten the hexagon
ontheprocessttingwithasuitablewrench.Wrenchsize,see
chapter"Dimensions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
SealtheangeconnectionsaccordingtoDIN/ANSIwithasuitable,
resistant seal and mount VEGABAR 54 with suitable screws.
Usethesealcorrespondingtotheinstrument.
→ Shift VEGABAR 54 with PMC connection into the socket and
fasten with two screws M8x10.
4.3 Mounting steps, external housing
1. Mark the holes according to the following drilling template
2. Depending on the mounting surface, fasten the wall mounting
plate with 4 screws
90 mm
(3.54")
R 3,5 mm
(0.14")
3mm
(0.12")
70 mm
(2.76")
8 mm
(0.32")
93 mm
(3.66")
110 mm
(4.33")
Fig. 6: Drilling template - wall mounting plate
Tip:
Mount the wall mounting plate so that the cable entry of the socket
housing points downward.The socket housing can be displaced by
180° to the wall mounting plate.
Warning:
The four screws of the socket housing must only be hand screwed. A
torque > 5 Nm (3.688 lbf ft) can damage the wall mounting plate.
Welding the socket
Sealing/Screwing in
threaded versions
Sealing/Screwing in
angeversions
Mounting, socket ver-
sions
Wall mounting

16
5 Connecting to power supply
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
• Connect only in the complete absence of line voltage
• If overvoltage surges are expected, overvoltage arresters should
beinstalledaccordingtoFoundationFieldbusspecication
Tip:
We recommend VEGA overvoltage arrester B63-32.
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcerticatesofthesensorsandpower
supply units.
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 screened cable according to Fieldbus
specication.
Usecablewithroundcross-section.Acableouterdiameterof
5…9mm(0.2…0.35in)ensuresthesealeectofthecablegland.
Ifyouareusingcablewithadierentdiameterorcross-section,
exchange the seal or use a suitable cable gland.
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.
On the instrument with cable entry ½ NPT and plastic housing there is
ametallic½"threadedinsertmouldedintotheplastichousing.
Caution:
No grease should be used when screwing the NPT cable gland or
steel tube into the threaded insert. Standard grease can contain
additives that corrode the connection between threaded insert and
housing.Thiswouldinuencethestabilityoftheconnectionandthe
tightness of the housing.
In systems with potential equalisation, connect the cable screen
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).
In systems without potential equalisation, connect the cable screen
directly to ground potential at the power supply unit and at the sensor.
In the connection box or T-distributor, the screen of the short stub to
the sensor must not be connected to ground potential or to another
cable screen.The cable screens to the power supply unit and to the
next distributor must be connected to each other and also connected
to ground potential via a ceramic capacitor (e.g. 1 nF, 1500 V). The
Safety instructions
Voltage supply
Connection cable
Cablegland½NPT
Cable screening and
grounding

17
5 Connecting to power supply
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
low frequency potential equalisation currents are thus suppressed,
buttheprotectiveeectagainsthighfrequencyinterferencesignals
remains.
The total capacitance of the cable and of all capacitors must not
exceed 10 nF in Ex applications.
Take note of the corresponding installation regulations for Ex applica-
tions. In particular, make sure that no potential equalisation currents
owoverthecablescreen.Incaseofgroundingonbothsidesthis
can be achieved by the use of a capacitor or a separate potential
equalisation.
5.2 Connection procedure
Proceed as follows:
1. Unscrewthehousingcover
2. If a display and adjustment module is installed, remove it by turn-
ing it to the left.
3. Loosen compression nut of the cable entry gland
4. Remove approx. 10 cm of the cable mantle, strip approx. 1 cm
insulation from the individual wires
5. Insert the cable into the sensor through the cable entry
6. Lift the opening levers of the terminals with a screwdriver (see
following illustration)
7. Insert the wire ends into the open terminals according to the wir-
ing plan
8. Press down the opening levers of the terminals, you will hear the
terminal spring closing
9. Check the hold of the wires in the terminals by lightly pulling on
them
10. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation
11. Tighten the compression nut of the cable entry gland. The seal
ring must completely encircle the cable
12. Screw the housing cover back on
Theelectricalconnectionisnished.
Single/Double chamber
housing

18
5 Connecting to power supply
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
Fig. 7: Connection steps 6 and 7
Proceed as follows:
1. Loosen the four screws on the housing base with an Allen key
size4
2. Remove the mounting plate from the housing socket
3
2
1
Fig. 8: Components of the external housing
1 Screws
2 Wall mounting plate
3 Cable gland
IP 68 version with exter-
nal housing

19
5 Connecting to power supply
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
3. Loop the connection cable through the cable entry on the housing
base1)
Information:
The cable gland can be mounted in three positions each displaced
by 90°. Simply exchange the cable gland against the blind plug in the
suitable thread opening.
4. Connectthewireendsasdescribedunder"Single/Double cham-
ber housing"accordingtothenumbering
5. Connect the screen to the internal ground terminal, connect the
outer ground terminal above on the housing to potential equalisa-
tion
6. Tighten the compression nut of the cable entry gland. The seal
ring must completely encircle the cable
7. Attach the mounting plate again and tighten the screws
The electrical connection of the sensor to the external housing is
nished.
5.3 Wiring plan, single chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
I²C
3
4
51
2
Display
Typ:
12 5678
Bus
Sim.
Fig. 9: Electronics and terminal compartment, single chamber housing
1 Plug connector for VEGACONNECT (I²C interface)
2 Spring-loaded terminals for connection of the external indication VEGADIS
61
3 Ground terminal for connection of the cable screen
4 Spring-loaded terminals for Foundation Fieldbus connection
5 Simulation switch ("on" = simulation mode)
Electronics and terminal
compartment
1) The connection cable comes pre-assembled. If necessary, shorten it to the
requested length, cut the breather capillaries clean. Remove approx. 5 cm of
the cable mantle, strip approx. 1 cm insulation from the ends of the individual
wires. After shortening the cable, fasten the type plate with support back on
the cable.

20
5 Connecting to power supply
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-141001
I2C
Display
1
12 5678
Fig. 10: Wiring plan, single chamber housing
1 Voltage supply, signal output
5.4 Wiring plan, double chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
I²C
2
3
1
Display
Typ:
12 5678
Bus
Sim.
Fig. 11: Electronics compartment, double chamber housing
1 Simulation switch ("on" = simulation mode)
2 Connection for VEGACONNECT (I²C interface)
3 Internal connection cable to the connection compartment
Wiring plan
Electronics compartment