Vega FIBERTRAC 31 User manual

Quick setup guide
Radiometric sensor for continuous level
and interface measurement
FIBERTRAC 31
Four-wire 4 … 20 mA/HART
Document ID: 62067

2
Contents
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Contents
1 For your safety ......................................................................................................................... 3
1.1 Authorised personnel ....................................................................................................... 3
1.2 Appropriate use................................................................................................................ 3
1.3 Warning about incorrect use............................................................................................. 3
1.4 General safety instructions............................................................................................... 3
1.5 EU conformity................................................................................................................... 4
1.6 NAMUR recommendations .............................................................................................. 4
1.7 Installation and operation in the USA and Canada ........................................................... 4
1.8 Environmental instructions ............................................................................................... 4
2 Product description ................................................................................................................. 5
2.1 Conguration.................................................................................................................... 5
2.2 Principle of operation........................................................................................................ 5
2.3 Corresponding source container...................................................................................... 6
3 Mounting................................................................................................................................... 8
3.1 General instructions ......................................................................................................... 8
3.2 Mounting instructions ....................................................................................................... 9
4 Connecting to power supply................................................................................................. 13
4.1 Preparing the connection ............................................................................................... 13
4.2 Connection - Level measurement................................................................................... 15
4.3 Connection - Level detection.......................................................................................... 17
4.4 Connection - Summation................................................................................................ 19
5 Set up with the display and adjustment module ................................................................ 21
5.1 Insert display and adjustment module............................................................................ 21
5.2 Parameter adjustment - Summation Secondary............................................................. 21
6 Supplement ............................................................................................................................ 24
6.1 Technical data ................................................................................................................ 24
Information:
This quick setup guide enables quick setup and commissioning of
your instrument.
Youcanndsupplementaryinformationinthecorresponding,more
detailed Operating Instructions Manual as well as the Safety Manual
thatcomeswithinstrumentswithSILqualication.Thesemanualsare
available on our homepage.
Operating instructions FiberTRAC 31 - Four-wire 4 … 20 mA/
HART: Document-ID 40446
Editing status of the quick setup guide: 2021-11-25

3
1 For your safety
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
1 For your safety
1.1 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.
1.2 Appropriate use
FIBERTRAC 31 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.
1.3 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.
1.4 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.
This measuring system uses gamma rays. Therefore take note of the
instructions for radiation protection in chapter " Product description".
Any work on the source container may only be carried out under the
supervisionofaqualiedradiationprotectionocer.

4
1 For your safety
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
1.5 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.
The EU conformity declaration can be found on our homepage.
Electromagnetic compatibility
Instrumentsinfour-wireorEx-d-iaversionaredesignedforuseinan
industrialenvironment.Nevertheless,electromagneticinterference
from electrical conductors and radiated emissions must be taken into
account,asisusualwithclassAinstrumentsaccordingtoEN61326-
1.Iftheinstrumentisusedinadierentenvironment,theelectromag-
netic compatibility to other instruments must be ensured by suitable
measures.
1.6 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 43 – Signal level for fault information from measuring transduc-
ers
• 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.
1.7 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.
1.8 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"

5
2 Product description
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
2 Product description
2.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
9
10
4
5
3
6
7
8
9
2
1
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Electronics
4 Protection rating
5 Ambient temperature
6 Measuring range
7 Hardware and software version
8 Order number
9 Serial number of the instrument
10 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)
• 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 QR-code on the type label of the device or
• Enter the serial number manually in the app
2.2 Principle of operation
The instrument is suitable for applications in liquids and bulk solids in
vesselsunderdicultprocessconditions.Thereareapplicationpos-
sibilities in nearly all areas of industry.
Type label
Serial number - Instru-
ment search
Application area

6
2 Product description
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
The level is detected contactlessly right through the vessel wall.
Neitheraprocessttingnoravesselopeningarerequired.Theinstru-
ment is thus ideal for retro installation.
Inradiometricmeasurement,aCaesium-137orCobalt-60isotope
emits focussed gamma rays that are attenuated when penetrating
the vessel wall and the medium. The PVT detector on the opposite
sideofthetankreceivestheradiation,whosestrengthisdependent
on the level. The measuring principle has proven to be very reliable
inconjunctionwithextremeprocessconditionsbecauseitmeasures
contactlessly from outside through the vessel wall.The measuring
systemensuresmaximumsafety,reliabilityandplantavailability,
independently of the medium and its properties.
2.3 Corresponding source container
A radioactive isotope in a suitable source holder is the prerequisite for
a radiometric measurement setup.
The handling of radioactive substances is regulated by law. The radia-
tion protection rules of the country in which the system is operated
applyrstandforemost.
InGermany,forexample,thecurrentradiationprotectionordinance
(StrlSchV) based on the Atomic Energy Law (AtG) applies.
The following points are important for measurement with radiometric
methods:
A handling permit is required for operation of a system using gamma
rays.Thispermitisissuedbytherespectivegovernmentoceorthe
responsibleauthority(inGermany,forexample,ocesforenviron-
mentalprotection,tradesupervisoryboards,etc.)
Youcanndfurtherinstructionsintheoperatinginstructionsmanual
of the source container.
Whenhandlingradioactivesources,unnecessaryradiationexposure
mustbeavoided.Anunavoidableradiationexposuremustbekeptas
low as possible.Take note of the following three important measures:
1 2 3
Fig. 2: Measures for protection against radioactive radiation
1 Shielding
2 Time
3 Distance
Functional principle
Handling permit
General instructions for
radiation protection

7
2 Product description
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Shielding: Provide good shielding between the source and your-
self as well as all other persons. Special source containers (e.g.
VEGASOURCE)aswellasallmaterialswithhighdensity(e.g.lead,
iron,concrete,etc.)provideeectiveshielding.
Time:Stayasshortatimeaspossibleinradiationexposedareas.
Distance:Your distance to the source should be as large as possible.
The local dose rate of the radiation decreases in proportion to the
square of the distance to the radiation source.
Theplantoperatormustappointaradiationsafetyocerwiththe
necessaryexpertknowledge.Heisresponsibleforensuringthatthe
radiation protection ordinance is complied with and for implementing
all radiation protection measures.
Controlareasareareasinwhichthelocaldoserateexceedsacertain
value.Onlypersonswhoundergoocialdosemonitoringareallowed
intothesecontrolareas.Youcanndtherespectivelyvalidlimitvalues
for control areas in the guideline of the respective authority (in Ger-
many,forexample,theradiationprotectionordinance).
We are at your disposal for further information concerning radiation
protection and regulations in other countries.
Radiationsafetyocer
Control area

8
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
3 Mounting
3.1 General instructions
The source container is part of the measuring system. In case the
sourcecontainerisalreadyequippedwithanactiveisotope,the
source container must be locked before mounting.
Danger:
Before mounting; make sure that the source is securely closed. Use
a padlock to secure the source container in the closed condition and
prevent it from being inadvertently opened.
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.
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
Switchosource
Protection against mois-
ture
Process conditions

9
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
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.
The suitable cable glands and blind plugs come with the instrument.
3.2 Mounting instructions
Note:
Duringtheplanning,ourspecialistswillanalysetheconditionsofthe
measurement loop to dimension the isotope accordingly.
Yougeta"SourceSizing"documentspecifyingtherequiredsource
activity and containing all relevant mounting information for your
measuring point.
Youmustfollowtheinstructionsinthis"SourceSizing"documentin
addition to the following mounting instructions.
The following mounting information is applicable as long as there is
nothingelsespeciedinthe"SourceSizing"document.
L1
L2
h
Fig. 3: Level measurement in a storage tank
h Measuring range
L Measurement length (L1, L2)
Cable glands
Installation position

10
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Youcanndinformationonprotectivebarriersandthemounting
of the corresponding source container in the operating instructions
manualofthesourcecontainer,e.g.VEGASOURCE.
You can mount the FIBERTRAC 31 with the housing head upward or
downward.Whenthehousingheadismounteddownward,thehous-
ing itself is more easily accessible.
Fasten the sensor in such a way that it cannot fall out of the holder. If
necessary,providethesensorwithasupportfrombelow.
DirecttheexitangleofthesourcecontainertotheFIBERTRAC31.
Mount the source container as close as possible to the vessel. If there
aregaps,securetheareawithasafetyfenceandprotectivegrating
so that no one can reach into the dangerous area.
You can mount the sensor on your vessel with the enclosed mounting
clamps. A number of mounting clamps come with the FIBERTRAC 31
depending on the length of the sensor.
Useamountingclampapprox.every450mm(17.72in).During
mounting,adjustthedistancesbetweentheattachedmountingclips.
Takenoteoftheminimumbendingradiusofthesensor,whichis
305 mm (12 in).
X
Fig. 4: Mounting clamp
x Hole for screw M8
→ Determinetheexactmountingpositionofoneorseveralmounting
clamps and mark the holes.
Alignthemountingpositionsexactlyandaveragethedistances
between the enclosed mounting clamps.
Drillappropriateholes(max.M12)forfasteningthemounting
clamps.
Note:
The mounting clamps do not come with fastening screws. Use fasten-
ing elements that are appropriate for the situation in your plant.
Tomeasurethelevelinveryhighvessels,multipleinstrumentscanbe
cascaded.
Cascading means that two or several instruments are connected
which can together cover a longer measuring range.
YoucanndtheexactnumberofSecondariesinthe"Safety Manual".
Mounting clamps
Summation

11
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
L1L2
h
1
Fig. 5: Installation position - cascading arrangement
h Summed measuring range
L Measurement length (L1, L2)
1 Red marking line for designating the measuring range
Here,oneinstrumentactsasaPrimaryandallotherinstruments
operate as Summation Secondary. The pulse rates of all instruments
are summed in the Primary instrument and converted into a common
signal.
Ifseveralsensorsarecascaded,themeasuringrangesoftheindi-
vidual detectors must directly join each other. The detectors must also
slightly overlap.
Make sure that the red marking lines directly join the measuring range
ofthenextFIBERTRAC31.
Mount the FIBERTRAC 31 in such a way that the detector hose
is directly in the radiated area of the source container. Mount the
FIBERTRAC 31 preferably side by side and make sure that no detec-
tor hose is hidden by another sensor.
Onvesselswithtemperatureinsulation,thesensorandthesource
container should be preferably mounted outside of the tank insulation.
Vessel with heat insula-
tion

12
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Fig. 6: Level measurement on a heated vessel with heat insulation
Ifthisisnotpossible,makesurethatthereisasucientlylarge
cut-out in the tank insulation for mounting the sensor and the source
container.Makesurethatthemax.ambienttemperatureofthesensor
isnotexceeded.
Ifthemax.ambienttemperatureisexceeded,youmusttakesuitable
measures to protect the instrument against overheating.
You can protect the instrument by providing a suitable insulation
against the heat or mounting the instrument further away from the
heat source.
Make sure these measures are taken into account already in the plan-
ningstage.Ifyouwanttocarryoutsuchmeasureslateron,contact
our specialists to ensure that the accuracy of the application is not
impaired.
Ifthesemeasuresarenotsucienttomaintainthemax.ambient
temperature,youcouldconsiderusingthewateroraircoolingsystem
weoerforFIBERTRAC31.
The cooling system must also be included in the calculations for the
measuring point. Contact our specialists regarding the dimensioning
of the cooling.
Protection against heat

13
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
4 Connecting to power supply
4.1 Preparing the connection
Always keep in mind the following safety instructions:
• Theelectricalconnectionmustonlybecarriedout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.
Note:
Install a disconnecting device for the instrument which is easy to
access.The disconnecting device must be marked for the instrument
(IEC/EN 61010).
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.
Proceed as follows:
Theprocedureappliestoinstrumentswithoutexplosionprotection.
1. Unscrew the big housing cover
2. Loosen compression nut of the cable gland and remove blind
plug
3. 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
4. Insert the cable into the sensor through the cable entry
Safety instructions
Connection technology
Connection procedure

14
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
1
Fig. 7: Connection steps 4 and 5
1 Locking of the terminal blocks
5. Insertasmallslottedscrewdriverrmlyintotherectangularlock
openings of the respective connection terminal
6. Insert the wire ends into the round openings of the terminals ac-
cording to the wiring plan
Information:
Solidcoresaswellasexiblecoreswithcableendsleevesare
inserteddirectlyintotheterminalopenings.Incaseofexiblecores
withoutendsleeves,presstherectangularlockopeningwithasmall
screwdriver; the terminal opening is freed. When the screwdriver is
released,theterminalopeningclosesagain.
7. Check the hold of the wires in the terminals by lightly pulling on
them
Toloosenaline,insertasmallslottedscrewdriverrmlyintothe
rectangular lock opening according to the illustration
8. Connecttheshieldingtotheinternalgroundterminal,connectthe
externalgroundterminaltopotentialequalisation
9. Tighten the compression nut of the cable entry gland. The seal
ring must completely encircle the cable
10. Screw the housing lid back on
Theelectricalconnectionisnished.
Information:
The terminal blocks are pluggable and can be detached from the
electronics.Todothis,loosenthetwolaterallockingleversofthe
terminalblockwithasmallscrewdriver.Whenlooseningthelocking,
theterminalblockisautomaticallysqueezedout.Itmustsnapinplace
when re-inserted.

15
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
4.2 Connection - Level measurement
Non-Ex instruments and instruments with non-intrinsically safe
current output
1
1
24
/L
/N
PE
56 91011
22
11
12
2122 1920 18 17 14 1316 15 12
2
7
3
1
45
6
8
9
10
Fig. 8: Electronics and connection compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal output 4 … 20 mA/HART active
4 Signal output 4 … 20 mA/HART passive
5 Signal input 4 … 20 mA
6 Switching input for NPN transistor
7 Switchinginputoating
8 Transistor output
9 Interface for sensor-sensor communication (MGC)
10 Setting the bus address for sensor-sensor communication (MGC) 1)
5678
2
1
Fig. 9: Adjustment and connection compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Terminals for the external display and adjustment unit
2 Contact pins for the display and adjustment module or interface adapter
Instruments with intrinsically safe current output
Youcannddetailedinformationontheexplosion-protectedversions
(Ex-ia,Ex-d)intheEx-specicsafetyinstructions.Thesesafety
Electronics and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
Adjustment and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
1) MGC = Multi Gauge Communication

16
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
instructionsarepartofthescopeofdeliveryandcomewiththeEx-
approved instruments.
1
1
24
/L
/N
PE
56
22
11
12
2122 1920 18 17 14 1316 15 12
2
5
1
3
4
6
7
8
Fig. 10: Electronics and connection compartment (Ex-d) with instruments with
intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal input 4 … 20 mA
4 Switching input for NPN transistor
5 Switchinginputoating
6 Transistor output
7 Interface for sensor-sensor communication (MGC)
8 Setting the bus address for sensor-sensor communication (MGC) 2)
5678
2
3
4
12
+
( ) (-)
1
Fig. 11: Adjustment and connection compartment (Ex-ia) with instruments with
intrinsically safe current output
1 Terminals for intrinsically safe signal output 4 … 20 mA/HART (active)
2 Contact pins for the display and adjustment module or interface adapter
3 Terminals for the external display and adjustment unit
4 Ground terminal
Electronics and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
Adjustment and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
2) MGC = Multi Gauge Communication

17
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
4.3 Connection - Level detection
Non-Ex instruments and instruments with non-intrinsically safe
current output
1
1
24
/L
/N
PE
56 91011
22
11
12
2122 1920 18 17 14 1316 15 12
2
7
3
1
45
6
8
9
10
Fig. 12: Electronics and connection compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal output 8/16 mA/HART active
4 Signal output 8/16 mA/HART Multidrop passive
5 Signal input 4 … 20 mA
6 Switching input for NPN transistor
7 Switchinginputoating
8 Transistor output
9 Interface for sensor-sensor communication (MGC)
10 Setting the bus address for sensor-sensor communication (MGC) 3)
5678
2
1
Fig. 13: Adjustment and connection compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Terminals for the external display and adjustment unit
2 Contact pins for the display and adjustment module or interface adapter
Ifinductiveloadsorstrongercurrentsareswitchedthrough,thegold
plating on the relay contact surface will be permanently damaged.
The contact is then no longer suitable for switching low-voltage
circuits.
Electronics and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
Adjustment and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
Connection to a PLC
3) MGC = Multi Gauge Communication

18
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Inductive loads also result from the connection to a PLC input or
output and/or in combination with long cables. It is imperative that you
takemeasurestoextinguishsparkstoprotecttherelaycontact(e.g.Z
diode) or the transistor or 8/16 mA output.
Instruments with intrinsically safe current output
Youcannddetailedinformationontheexplosion-protectedversions
(Ex-ia,Ex-d)intheEx-specicsafetyinstructions.Thesesafety
instructionsarepartofthescopeofdeliveryandcomewiththeEx-
approved instruments.
1
1
24
/L
/N
PE
56
22
11
12
2122 1920 18 17 14 1316 15 12
2
5
1
3
4
6
7
8
Fig. 14: Electronics and connection compartment (Ex-d) with instruments with
intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal input 4 … 20 mA
4 Switching input for NPN transistor
5 Switchinginputoating
6 Transistor output
7 Interface for sensor-sensor communication (MGC)
8 Setting the bus address for sensor-sensor communication (MGC) 4)
Electronics and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
4) MGC = Multi Gauge Communication

19
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
5678
2
3
4
12
+
( ) (-)
1
Fig. 15: Adjustment and connection compartment (Ex-ia) with instruments with
intrinsically safe current output
1 Terminals for intrinsically safe signal output 8/16 mA/HART (Multidrop) ac-
tive
2 Contact pins for the display and adjustment module or interface adapter
3 Terminals for the external display and adjustment unit
4 Ground terminal
Ifinductiveloadsorstrongercurrentsareswitchedthrough,thegold
plating on the relay contact surface will be permanently damaged.
The contact is then no longer suitable for switching low-voltage
circuits.
Inductive loads also result from the connection to a PLC input or
output and/or in combination with long cables. It is imperative that you
takemeasurestoextinguishsparkstoprotecttherelaycontact(e.g.Z
diode) or the transistor or 8/16 mA output.
4.4 Connection - Summation
Tomeasurethelevelinveryhighvessels,multipleinstrumentscanbe
cascaded.
Cascading means that two or several instruments are connected
which can together cover a longer measuring range.
The instrument acts as Primary and all other instruments operate as
Secondaries.
The pulse rates of all instruments are summed in the Primary instru-
ment and converted into a common signal.
The Primary instrument must have the function "Level". For this pur-
pose,selectunderthemenuitem"Setup - Application" the function
"Level".
Set the address setting (MGC) on the Primary instrument to "99".
Forthis,theSecondaryinstrumentsmustbedenedas"Summation
Secondary". Select under the menu item " Setup - Application" the
function "Summation Secondary".
The address setting (MGC) on the Secondary instruments can be
freely selected. Only the address "99" is reserved for the Primary
instrument.
Adjustment and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
Connection to a PLC
Electronics and connec-
tion compartment - sum-
mation

20
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Note:
Make sure that all instruments are using the same software version.
Software version 2.0 is not downward-compatible.
Connect the instruments according to the following wiring plan:
1
1
2456 91011
22
11
12
2122 1920 18 17 14 1316 15 12
1
1
2456 91011
22
11
12
2122 1920 18 17 14 1316 15 12
1
1
2456 91011
22
11
12
2122 1920 18 17 14 1316 15 12
M
S
S
bus
bus
M
S
S
bus
bus
bus
bus
Fig. 16: Electronics and connection compartment with cascading of several
instruments.
M Primary instrument
S Secondary instrument
Information:
Forexample,aradialconnectionwouldbealsopossibleasanalter-
native. Take note of the polarity.
The selection of the two terminal pairs is individual.