Vega VEGAPULS 66 User manual

Operating Instructions
Radar sensor for continuous level
measurement of liquids
VEGAPULS 66
Modbus and Levelmaster protocol
Standpipe version
Document ID: 41367

2
Contents
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Contents
1 About this document ............................................................................................................... 4
1.1 Function ........................................................................................................................... 4
1.2 Target group ..................................................................................................................... 4
1.3 Symbols used................................................................................................................... 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................................................................................................................... 6
2.6 NAMUR recommendations .............................................................................................. 6
2.7 Radio license for Europe .................................................................................................. 6
2.8 Radio license for USA ...................................................................................................... 6
2.9 Radio license for Canada ................................................................................................. 7
2.10 Installation and operation in the USA and Canada ........................................................... 8
2.11 Environmental instructions ............................................................................................... 8
3 Product description ................................................................................................................. 9
3.1 Conguration.................................................................................................................... 9
3.2 Principle of operation...................................................................................................... 10
3.3 Packaging, transport and storage................................................................................... 11
3.4 Accessories and replacement parts ............................................................................... 12
4 Mounting................................................................................................................................. 14
4.1 General instructions ....................................................................................................... 14
4.2 Mounting instructions ..................................................................................................... 15
5 Connecting to power supply and bus system .................................................................... 16
5.1 Preparing the connection ............................................................................................... 16
5.2 Connecting..................................................................................................................... 17
5.3 Wiring plan, double chamber housing ............................................................................ 18
5.4 Double chamber housing with VEGADIS-Adapter.......................................................... 20
5.5 Switch-on phase............................................................................................................. 20
6 Set up the sensor with the display and adjustment module............................................. 22
6.1 Adjustment volume......................................................................................................... 22
6.2 Insert display and adjustment module............................................................................ 22
6.3 Adjustment system......................................................................................................... 23
6.4 Measured value indication - Selection of national language........................................... 24
6.5 Parameter adjustment .................................................................................................... 25
6.6 Saving the parameterisation data................................................................................... 37
7 Setting up sensor and Modbus interface with PACTware.................................................. 38
7.1 Connect the PC.............................................................................................................. 38
7.2 Parameter adjustment .................................................................................................... 39
7.3 Set instrument address .................................................................................................. 40
7.4 Saving the parameterisation data................................................................................... 41
8 Diagnosis, asset management and service ........................................................................ 42
8.1 Maintenance .................................................................................................................. 42
8.2 Measured value and event memory ............................................................................... 42

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Contents
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
8.3 Asset Management function........................................................................................... 43
8.4 Rectify faults................................................................................................................... 46
8.5 Exchanging the electronics module................................................................................ 48
8.6 Software update ............................................................................................................. 49
8.7 How to proceed if a repair is necessary.......................................................................... 49
9 Dismount................................................................................................................................. 51
9.1 Dismounting steps.......................................................................................................... 51
9.2 Disposal ......................................................................................................................... 51
10 Supplement ............................................................................................................................ 52
10.1 Technical data ................................................................................................................ 52
10.2 Basics Modbus............................................................................................................... 58
10.3 Modbus register ............................................................................................................. 60
10.4 Modbus RTU commands ............................................................................................... 62
10.5 Levelmaster commands ................................................................................................. 65
10.6 CongurationoftypicalModbushosts ........................................................................... 68
10.7 Dimensions .................................................................................................................... 70
10.8 Industrial property rights................................................................................................. 72
10.9 Trademark ...................................................................................................................... 72
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: 2018-11-23

4
1 About this document
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
1 About this document
1.1 Function
This operating instructions provides all the information you need for
mounting, connection and setup as well as important instructions for
maintenance,faultrectication,theexchangeofpartsandthesafety
of the user. Please read this information 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 personnel.
Thecontentsofthismanualmustbemadeavailabletothequalied
personnel and implemented.
1.3 Symbols used
Document ID
This symbol on the front page of this instruction refers to the Docu-
ment ID. By entering the Document ID on www.vega.com you will
reach the document download.
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.
• 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.

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2 For your safety
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
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
VEGAPULS 66 is a sensor for continuous level 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.
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.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 and their meaning read in this oper-
ating instructions manual.

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2 For your safety
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Depending on the instrument version, the emitting frequencies are in
the C, K or W band range. The low emission power is far below the
internationally approved limit values. When used correctly, the device
poses no danger to health.
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.
YoucanndtheEUconformitydeclarationonourwebsiteunder
www.vega.com/downloads.
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 Radio license for Europe
The instrument was tested according to the latest issue of the follow-
ingharmonizedstandards:
• EN 302372 - Tank Level Probing Radar
It is hence approved for use inside closed vessels in countries of the
EU.
Use is also approved in EFTA countries, provided the respective
standards have been implemented.
For operation inside of closed vessels, points a to f in annex E of
EN302372mustbefullled.
2.8 Radio license for USA
This approval is only valid for USA. Hence the following text is only
available in the English language.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
• This device may not cause interference, and
• This device must accept any interference, including interference
that may cause undesired operation of the device
This device is approved for unrestricted use only inside closed, sta-
tionaryvesselsmadeofmetal,reinforcedberglassorconcrete.

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2 For your safety
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Changesormodicationsnotexpresslyapprovedbythemanufac-
turer could void the user’s authority to operate this equipment.
2.9 Radio license for Canada
This approval is only valid for Canada. Hence the following texts are
only available in the English/French language.
This device complies with Industry Canada's license-exempt RSS
standard(s). Operation is subject to the following conditions:
• This device may not cause interference, and
• This device must accept any interference, including interference
that may cause undesired operation of the device
This device has been approved for closed containers with the follow-
ing limitations:
• ClosedContainers:Forinstallationsutilizingatiltduringinstalla-
tion: This device is limited to installation in a completely enclosed
containermadeofmetal,reinforcedberglassorconcretetopre-
vent RF emissions, which can otherwise interfere with aeronauti-
cal navigation, the maximum approved tilt angle is 10°.
• The installation of the LPR/TLPR device shall be done by trained
installers, in strict compliance with the manufacturer's instructions.
• The use of this device is on a "no-interference, no-protection"
basis.That is, the user shall accept operations of high-powered
radar in the same frequency band which may interfere with or
damage this device.
• However, devices found to interfere with primary licensing opera-
tions will be required to be removed at the user's expense.
• The installer/user of this device shall ensure that it is at least 10
km from the Dominion Astrophysical Radio Observatory (DRAO)
near Penticton, British Columbia. The coordinates of the DRAO
arelatitude49°19′15″Nandlongitude119°37′12″W.Fordevices
not meeting this 10 km separation (e.g., those in the Okanagan
Valley, British Columbia,) the installer/user must coordinate with,
and obtain the written concurrence of, the Director of the DRAO
before the equipment can be installed or operated.The Director
of the DRAO may be contacted at 250-497-2300 (tel.)or 250-497-
2355 (fax). (Alternatively, the Manager, Regulatory Standards,
Industry Canada, may be contacted.)
Le présent appareil est conforme aux CNR d’Industrie Canada ap-
plicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux conditions suivantes:
• L’appareil ne doit pas produire de brouillage; et
• L’utilisateur de l’appareil doit accepter tout brouillage radioélect-
rique subi, même si le brouillage est susceptible d’en compromet-
tre le fonctionnement.
Cet appareil est homologué pour une utilisation dans les cuves fer-
mées avec les restrictions suivantes :
• Cuves fermées : Pour les installations impliquant une inclinaison
lors de l'installation : cet appareil ne doit être installé que dans une
cuve totalement fermée en métal ou en béton, pour empêcher les

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2 For your safety
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
émissions RF susceptibles d'interférer avec la navigation aéronau-
tique. L'angle d'inclinaison maximum autorisé est de 10°.
• L’installationd’undispositifLPRouTLPRdoitêtreeectuée
pardesinstallateursqualiés,enpleineconformitéavecles
instructions du fabricant.
• Ce dispositif ne peut être exploité qu'en régime de non-brouillage
et de non-protection, c'est-à-dire que l'utilisateur doit accepter que
des radars de haute puissance de la même bande de fréquences
puissent brouiller ce dispositif ou même l'endommager. D'autre
part, les capteurs de niveau qui perturbent une exploitation autori-
sée par licence de fonctionnement principal doivent être enlevés
aux frais de leur utilisateur.
• La personne qui installe/utilise ce capteur de niveau doit s'assurer
qu'il se trouve à au moins 10 km de l'Observatoire fédéral de
radioastrophysique (OFR) de Penticton en Colombie-Britannique.
Lescoordonnéesdel'OFRsont:latitudeN49°19′15″,longitude
O119°37′12″.Lapersonnequiinstalle/utiliseundispositifne
pouvant respecter cette distance de 10km (p. ex. dans la vallée
de l'Okanagan [Colombie-Britannique]) doit se concerter avec le
directeurdel'OFRand’obtenirdesapartuneautorisationécrite
avant que l'équipement ne puisse être installé ou mis en marche.
Le directeur de l'OFR peut être contacté au 250-497-2300 (tél.) ou
au 250-497-2355 (fax). (Le Directeur des Normes réglementaires
d'Industrie Canada peut également être contacté).
2.10 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.
2.11 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"

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3 Product description
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
3 Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
2
1
15
13
14
12
11
5
3
6
4
7
8
10
9
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Power supply and signal output, electronics
5 Protection rating
6 Measuring range
7 Process and ambient temperature, process pressure
8 Material wetted parts
9 Hardware and software version
10 Order number
11 Serial number of the instrument
12 Data matrix code for VEGA Tools app
13 Symbol of the device protection class
14 ID numbers, instrument documentation
15 Reminder to observe the 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
Go to "www.vega.com", "Search". Enter the serial number.
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 Data Matrix code on the type label of the instrument or
• Enter the serial number manually in the app
Type label
Serial number - Instru-
ment search

10
3 Product description
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Theinstrumentcontainstwodierentelectronicsinitshousingcham-
bers:
• The Modbus electronics for power supply and communication with
the Modbus-RTU
• The sensor electronics for the actual measuring tasks
2
1
Fig. 2: Position of Modbus and sensor electronics
1 Modbus electronics
2 Sensor electronics
This operating instructions manual applies to the following instrument
versions:
• Hardware from 2.1.0
• Software from 4.5.3
Theinstrumentisavailableintwodierentsensorelectronicsver-
sions.The selection depends on the application area, see chapter
"Principle of operation".
This version can be determined via the product code on the type label
as well as on the electronics.
• Standard electronics type PS60HK.-
• Electronics with increased sensitivity type PS60HS.-
The scope of delivery encompasses:
• Radar sensor
• Documentation
– Quick setup guide VEGAPULS 66
– Instructions for optional instrument features
– Ex-specic"Safety instructions" (with Ex versions)
– Ifnecessary,furthercerticates
Information:
The optional instrument features are described in the operating
instructions manual.The respective scope of delivery results from the
orderspecication.
3.2 Principle of operation
The instrument is suitable for the measurement of liquids under dif-
cultandextremeprocessconditions.Applicationpossibilitiescan
be found in the chemical industry, in environmental and recycling
technology as well as in the petrochemical industry.
Electronics design
Scope of this operating
instructions
Versions of the sensor
electronics
Scope of delivery
Application area

11
3 Product description
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
The version with standpipe antenna is particularly suitable for
measurement of solvents and liquid gases, for vessels with foam
generation or for measurement of products with low dielectric values
(DK > 1.6).
Measurement in a standpipe is not recommended for extremely
adhesive products.
Theinstrumentcanbeusedwithproductswithanεrvalue≥1.8.The
actually achievable value depends on the measuring conditions, the
antenna system, the standpipe or bypass.
The antenna of the radar sensor emits short radar pulses with a
durationofapprox.1ns.Thesepulsesarereectedbytheproduct
and received by the antenna as echoes.The transit time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level.The determined level is converted into an appropri-
ate output signal and outputted as measured value.
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 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 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
Functional principle
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Lifting and carrying

12
3 Product description
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
3.4 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 or the external display and adjustment unit and removed at
any time.
The integrated Bluetooth module (optional) enables wireless adjust-
ment via standard adjustment devices:
• Smartphone/tablet (iOS or Android operating system)
• PC/notebook with Bluetooth USB adapter (Windows operating
system)
Youcanndfurtherinformationintheoperatinginstructions"Display
and adjustment module PLICSCOM" (Document-ID 36433).
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC. For
parameter adjustment of these instruments, the adjustment software
PACTware with VEGA-DTM is required.
Youcanndfurtherinformationintheoperatinginstructions"Interface
adapter VEGACONNECT" (Document-ID 32628).
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
For sensors with double chamber housing the interface adapter
"VEGADIS adapter" is also required for VEGADIS 81.
Youcanndfurtherinformationintheoperatinginstructions
"VEGADIS 81" (Document-ID 43814).
PLICSMOBILE T81 is an external GSM/GPRS/UMTS radio unit for
transmission of measured values and for remote parameter adjust-
ment of HART sensors.The adjustment is carried out via a PC with
PACTware and the corresponding DTM or via smartphone/tablet with
the VEGA Tools app.The connection is made via the Bluetooth inter-
face integrated in PLICSMOBILE.
Youcanndfurtherinformationintheoperatinginstructions
"PLICSMOBILE T81/B81/S81" (Document-ID 55234).
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.
Youcanndadditionalinformationinthesupplementaryinstructions
manual "Flanges according to DIN-EN-ASME-JIS".
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).
PLICSCOM
VEGACONNECT
VEGADIS 81
PLICSMOBILE T81
Flanges
Protective cover

13
3 Product description
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Electronics module "VEGAPULS series 60" is a replacement part for
radarsensorsofVEGAPULSseries60.Adierentversionisavailable
for each type of signal output.
Youcanndfurtherinformationintheoperatinginstructions"Elec-
tronics module VEGAPULS series 60" (Document-ID 36801).
The supplementary electronics is a replacement part for sensors with
signal output Modbus.
Youcanndfurtherinformationintheoperatinginstructions"Supple-
mentary electronics for Modbus" (Document-ID 41864).
Electronics module
Supplementary electron-
ics for Modbus

14
4 Mounting
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
4 Mounting
4.1 General instructions
Ondeviceswithathreadedtting,thehexagonontheprocesstting
must be tightened with a suitable wrench.
See chapter "Dimensions"forwrenchsize.
Warning:
The housing or the electrical connection may not be used for screw-
ing in! Tightening can cause damage, e. g. to the rotation mechanism
of the housing.
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
• Whenmountinghorizontally,turnthehousingsothatthecable
gland or plug connector point downward
• 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.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Makesurethatthedegreeofcontaminationspeciedinchapter
"Technical data" meets the existing ambient conditions.
Make sure before mounting that all parts of the instrument exposed 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
Youcannddetailedinformationontheprocessconditionsinchapter
"Technical data" as well as on the type label.
The instrument is suitable for standard and extended ambient condi-
tions acc. to IEC/EN 61010-1.
Screwing in
Protection against mois-
ture
Suitability for the process
conditions
Suitability for the ambient
conditions

15
4 Mounting
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
4.2 Mounting instructions
Byusingthestandpipeversion,theinuenceofturbulenceandves-
sel installations, such as e.g. heating spirals or agitators, is excluded.
If turbulence or vigorous product movement occurs in the vessel, long
standpipe antennas should be fastened to the vessel wall.
The standpipe antenna must extend all the way down to the request-
ed min. level, as measurement is only possible within the tube. If a
good mixing of the product is important, you should use a version with
perforated surge pipe.
Mounting

16
5 Connecting to power supply and bus system
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
5 Connecting to power supply and 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:
Connect only in the complete absence of line voltage.
The instrument requires an operating voltage of 8 … 30 V DC. Operat-
ing voltage and digital bus signal are carried on separate two-wire
connection cables.
The instrument is connected with standard two-wire, twisted cable
suitable for RS 485. If electromagnetic interference is expected which
is above the test values of EN 61326 for industrial areas, screened
cable should be used.
Make sure that the cable used has the required temperature resist-
anceandresafetyformax.occurringambienttemperature
Use cable with round cross section for instruments with housing and
cable gland. Use a cable gland suitable for the cable diameter to
ensurethesealeectofthecablegland(IPprotectionrating).
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.
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.
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.
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".
Safety instructions
Voltage supply
Connection cable
Cable glands

17
5 Connecting to power supply and bus system
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
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 and the sensor.
The cable screening 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).
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. Loosen compression nut of the cable gland and remove blind
plug
3. Remove approx. 10 cm (4 in) of the cable mantle (signal output),
strip approx. 1 cm (0.4 in) insulation from the ends of the indi-
vidual wires
4. Insert the cable into the sensor through the cable entry
Fig. 3: Connection steps 5 and 6
5. Insert the wire ends into the terminals according to the wiring plan
Cable screening and
grounding
Connection technology
Connection procedure

18
5 Connecting to power supply and bus system
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
Information:
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.
6. Check the hold of the wires in the terminals by lightly pulling on
them
7. Connect the cable screening to the internal ground terminal, con-
nect the outer ground terminal to potential equalisation in case of
power supply via low voltage
8. Connect the lead cable for voltage supply in the same way ac-
cording to the wiring plan, in addition connect the ground conduc-
tor to the inner ground terminal when powered with mains voltage.
9. Tighten the compression nut of the cable glands.The seal ring
must completely encircle the cables
10. Screw the housing lid back on
Theelectricalconnectionisnished.
Information:
The terminal blocks are pluggable and can be removed from the
housing insert. To do this, lift the terminal block with a small screwdriv-
er and pull it out. When inserting the terminal block again, you should
hear it snap in.
5.3 Wiring plan, double chamber housing
2
1
Fig. 4: Position of connection compartment (Modbus electronics) and electron-
ics compartment (sensor electronics)
1 Connection compartment
2 Electronics compartment
Overview

19
5 Connecting to power supply and bus system
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
5678
4...20mA
2
12
+
( ) (-)
11
Fig. 5: Electronics compartment - double chamber housing
1 Internal connection to the connection compartment
2 For display and adjustment module or interface adapter
+
+
power supply
MODBUS
D0
D1
IS GND
USB
1
2
4 3
1345
2off on
( )
(
)
(-)
(-)
Fig. 6: Connection compartment
1 USB interface
2 Slideswitchforintegratedterminationresistor(120Ω)
3 Modbus signal
4 Voltage supply
Terminal Function Polarity
1 Voltage supply +
2 Voltage supply -
3 Modbus signal D0 +
4 Modbus signal D1 -
5 Function ground when installing ac-
cording to CSA (Canadian Standards
Association)
Electronics compartment
Connection compartment

20
5 Connecting to power supply and bus system
VEGAPULS 66 • Modbus and Levelmaster protocol
41367-EN-181127
5.4 Double chamber housing with
VEGADIS-Adapter
3
4
1
2
Fig. 7: View to the electronics compartment with VEGADIS adapter for connec-
tion of the external display and adjustment unit
1 VEGADIS adapter
2 Internal plug connection
3 Plug connector M12 x 1
34
12
Fig. 8: View to the plug connector M12 x 1
1 Pin 1
2 Pin 2
3 Pin 3
4 Pin 4
Contact pin Colour, connection ca-
ble in the sensor
Terminal, electronics
module
Pin 1 Brown 5
Pin 2 White 6
Pin 3 Blue 7
Pin 4 Black 8
5.5 Switch-on phase
After VEGAPULS 66 is connected to the bus system, the instrument
carries out a self-test for approx. 30 seconds.The following steps are
carried out:
• Internal check of the electronics
• Indication of a status message, e.g. "F 105 Determine measured
value" on the display or PC
• Statusbytegoesbrieytofaultvalue
Electronics compartment
Assignment of the plug
connector