Burkert 8696 User manual

8696
Burkert
Brand
Burkert
Model
8696
Type
User manual

Burkert 8696 is an electropneumatic position controller that can be used for process control tasks. It is designed for use with single-acting actuators and allows for precise positioning of pneumatic control valves. With its automatic adjustment feature, it can self-calibrate to the attached actuator, making it easy to set up and maintain. Additionally, the 8696 has safety positions that can be configured to fail-open or fail-closed in case of a power or air supply failure.

Burkert 8696 is an electropneumatic position controller that can be used for process control tasks. It is designed for use with single-acting actuators and allows for precise positioning of pneumatic control valves. With its automatic adjustment feature, it can self-calibrate to the attached actuator, making it easy to set up and maintain. Additionally, the 8696 has safety positions that can be configured to fail-open or fail-closed in case of a power or air supply failure.

Quickstart
English Deutsch Français
Type 8696
Positioner TopControl Basic
Electropneumatic Position Controller
Elektropneumatischer Stellungsregler
Positionneur électropneumatiques
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modications techniques.
© Bürkert Werke GmbH & Co. KG, 2007 - 2021
Quickstart 2106/08_EU-ML_00805654 / Original DE
3
1 QUICKSTART ........................................................................ 4
1.1 Denitionofterm/abbreviation .................................. 4
1.2 Symbols ....................................................................... 4
2 AUTHORIZED USE ............................................................... 5
3 BASIC SAFETY INSTRUCTIONS .......................................... 5
4 GENERAL INFORMATION .................................................... 7
4.1 Contact address .......................................................... 7
4.2 Warranty ...................................................................... 7
4.3 Informationontheinternet .......................................... 7
5 SYSTEM DESCRIPTION ....................................................... 7
5.1 Structureandfunction ................................................. 7
5.2 Modelforcontrolofthird-partydevices ...................... 8
6 TECHNICAL DATA ................................................................. 9
6.1 Conformity ................................................................... 9
6.2 Standards .................................................................... 9
6.3 Licenses ...................................................................... 9
6.4 Operating conditions ................................................... 9
6.5 Mechanical data ........................................................ 10
6.6 Typelabels ................................................................. 10
6.7 Pneumatic data ......................................................... 11
6.8 Electrical data ............................................................ 11
6.9 Factorysettingsofthepositioner .............................. 12
7 INSTALLATION .................................................................... 12
7.1 Safetyinstructions ..................................................... 12
7.2 Installationofthepositioneronprocessvalves
 ofseries2103and23xx ............................................ 13
8 PNEUMATIC INSTALLATION .............................................. 14
9 ELECTRICAL INSTALLATION ............................................. 15
9.1 Safetyinstructions ..................................................... 15
9.2 Electricalinstallationwithcircularplug-inconnector 15
10 START-UP ............................................................................ 16
10.1 Safetyinstructions ..................................................... 16
10.2 Automatic adjustment X.TUNE ................................. 16
10.3 Control and display elements .................................... 18
11 SAFETY POSITIONS ........................................................... 21
12 ACCESSORIES ................................................................... 22
12.1 Communicationssoftware......................................... 22
12.2 USBinterface ............................................................ 22
12.3 Download .................................................................. 22
13 PACKAGING, TRANSPORT, STORAGE ............................. 22
Table of Contents
english
Type 8696
4
Quickstart
1 QUICKSTART
TheQuickstartdescribetheentirelifecycleofthedevice.Keepthe
Quickstartinalocationwhichiseasilyaccessibletoeveryuserand
maketheQuickstartavailabletoeverynewownerofthedevice.
Important Safety Information.
ReadQuickstartcarefullyandthoroughly.Studyinparticular
the chapters entitled “Basicsafetyinstructions” and “Autho-
rizeduse”.
▶Quickstartmustbereadandunderstood.
Quickstartexplains,forexample,howtoinstallandstart-upthe
device.
Adetaileddescriptionofthedevicecanbefoundintheoper-
atinginstructionsforpositionerType8696.
TheoperatinginstructionscanbefoundontheInternetat:
www.burkert.com
1.1 Denition of term / abbreviation
Theterm“device”usedintheseinstructionsalwaysstandsfor
the positioner Type 8696.
Intheseinstructions,theabbreviation“Ex”alwaysrefersto
“potentiallyexplosiveatmosphere”.
1.2 Symbols
Thefollowingsymbolsareusedintheseinstructions.
DANGER!
Warns of an immediate danger.
▶Failuretoobservethewarningmayresultinafatalorserious
injury.
WARNING!
Warns of a potentially dangerous situation.
▶Failuretoobservethewarningmayresultinseriousinjuries
or death.
CAUTION!
Warns of a possible danger.
▶Failuretoobservethiswarningmayresultinamediumor
minor injury.
NOTE!
Warns of damage to property.
indicatesimportantadditionalinformation,tipsand
recommendations.
referstoinformationintheseoperatinginstructionsorin
other documentation.
▶Designatesaninstructiontopreventrisks.
→designatesaprocedurethatmustbecarriedout.
english
Type 8696
5
Authorized use
2 AUTHORIZED USE
Non-authorized use of the positioner Type 8696 may be a
hazard to people, nearby equipment and the environment.
▶Thedeviceisdesignedtobemountedonpneumaticactua-
torsofprocessvalvesforthecontrolofmedia.
▶Donotexposethedevicetodirectsunlight.
▶Useaccordingtotheauthorizeddata,operatingconditions
andconditionsofusespeciedinthecontractdocuments
andoperatinginstructions.Thesearedescribedinthechap-
ter entitled
“6Technicaldata”.
▶Thedevicemaybeusedonlyinconjunctionwiththird-party
devicesandcomponentsrecommendedandauthorizedby
Bürkert.
▶Inviewofthelargenumberofoptionsforuse,beforeinstal-
lation,itisessentialtostudyandifnecessarytotestwhether
thepositionerissuitablefortheactualuseplanned.
▶Correcttransportation,correctstorageandinstallationand
carefuluseandmaintenanceareessentialforreliableand
faultlessoperation.
▶Use the positioner Type 8696 only as intended.
3 BASIC SAFETY INSTRUCTIONS
Thesesafetyinstructionsdonotmakeallowanceforany
•contingenciesandeventswhichmayariseduringtheinstallation,
operationandmaintenanceofthedevices.
•localsafetyregulations–theoperatorisresponsibleforobserving
theseregulations,alsowithreferencetotheinstallationpersonnel.
Risk of injury from high pressure in the equipment/device.
▶Beforeworkingonequipmentordevice,switchothepressure
anddeaerate/drainlines.
Risk of electric shock.
▶Beforeworkingonequipmentordevice,switchothepower
supplyandsecuretopreventreactivation.
▶Observeapplicableaccidentpreventionandsafetyregulations
forelectricalequipment.
english
Type 8696
6
Basic safety instructions
General hazardous situations.
Topreventinjury,ensure:
▶In the potentially explosive atmosphere the positioner Type
8696 may be used only according to the specication on
theseparateapprovalsticker.Foruseobservetheadditional
instructions enclosed with the device together with safety
instructionsforthepotentiallyexplosiveatmosphere.
▶Deviceswithoutaseparateapprovalstickermaynotbeused
in a potentiallyexplosiveatmosphere.
▶Installationandrepairworkmaybecarriedoutbyauthorized
technicians only and with the appropriate tools.
▶Afteraninterruptioninthepowersupplyorpneumatic
supply,ensurethattheprocessisrestartedinadenedor
controlled manner.
▶Thedevicemaybeoperatedonlywheninperfectcondition
andinconsiderationoftheoperatinginstructions.
▶Thegeneralrulesoftechnologyapplytoapplicationplanning
andoperationofthedevice.
Topreventdamagetopropertyofthedevice,ensure:
▶Donotfeedanyaggressiveorammablemediaintothepilot
air port.
▶Donotfeedanyliquidsintothepilotairport.
▶When unscrewing and screwing in the body casing or the
transparentcap,donotholdtheactuatoroftheprocessvalve
buttheconnectionhousingofType8696.
▶Donotputanyloadsonthehousing(e.g.byplacingobjects
on it or standing on it).
▶Donotmakeanyexternalmodicationstothedevice
housings.
NOTE!
Electrostatic sensitive components / modules.
The device contains electronic components which react sen-
sitively to electrostatic discharge (ESD). Contact with electro-
statically charged persons or objects is hazardous to these
components.Intheworstcasescenario,theywillbedestroyed
immediatelyorwillfailafterstart-up.
▶ObservetherequirementsinaccordancewithEN61340-5-1to
minimiseoravoidthepossibilityofdamagecausedbysudden
electrostatic discharge.
▶Also ensure that you do not touch electronic components when
thepowersupplyvoltageispresent.
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Type 8696
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General information
4 GENERAL INFORMATION
4.1 Contact address
Germany
Bürkert Fluid Control System
Sales Center
Chr.-Bürkert-Str.13-17
D-74653Ingelngen
Tel.+49(0)7940-1091111
Fax+49(0)7940-1091448
E-mail:[email protected]
International
Contactaddressescanbefoundonthenalpagesoftheprinted
operating instructions.
AndalsoontheInternetat:
www.burkert.com
4.2 Warranty
ThewarrantyisonlyvalidifthepositionerType8696isusedas
intendedinaccordancewiththespeciedapplicationconditions.
4.3 Information on the internet
TheoperatinginstructionsanddatasheetsforType8696canbe
foundontheInternetat:
www.burkert.com
5 SYSTEM DESCRIPTION
5.1 Structure and function
Positioner
Actuator
Valvebody
Processvalve
Fig. 1: Structure 1
PositionerType8696isanelectropneumaticpositioncontrollerfor
pneumaticallyactuatedcontrolvalveswithsingle-actingactuators.
Togetherwiththepneumaticactuator,thepositionerformsafunc-
tional unit.
Thecontrolvalvesystemscanbeusedforawiderangeofcontrol
tasksinuidtechnologyand,dependingontheapplicationcondi-
tions,dierentprocessvalvesfromtheBürkertrangecanbecom-
binedwiththepositioner.Angleseatvalves,straightseatvalvesor
diaphragmvalvesoftheType2300,2301or2103withanactuator
sizeof50mmaresuitable.
english
Type 8696
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System description
Pilotairport(label:1)
Exhaustairport(label:3)
Electrical connection
(circularplug-inconnector)
DIP Switches
Key 2
Key 1
LED 2
LED 1
Communications
interface
Transparent cap removed:
Pressurelimitingvalve
(forprotectionagainsttoo
high internal pressure in
caseoferror)
Connection housing
Fig. 2: Structure 2
Thepositionoftheactuatorisregulatedaccordingtotheposition
set-point value. The nominal position value is specied by an
externalstandardsignal.
5.2 Model for control of third-party
devices
AspecialmodelenablesthepositionerType8696tobeattached
tothird-partydevices.
Thismodelhasadierentpneumaticconnectionhousingso
thatthepilotairportscanbeconnectedtotheoutsideofthe
actuator.
Electrical connection
(circularplug-inconnector)
Exhaustairport
(label:3)
Pilot air port
(label:1)
Fasteningscrews(2x)
Pilot air outlet 22
Pilot air outlet 21
Connection housing
Fig. 3: Model for third-party devices
NOTE!
Damage or malfunction due to ingress of dirt and moisture.
▶TocomplywithprotectionclassIP65/IP67,connectthe
pilot air outlet (onlyforCFAorCFB)whichisnotrequiredto
thefreepilotairportofthethird-partydeviceorsealwitha
plug.
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Type 8696
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Technical data
“Inrestposition”meansthatthepilotvalvesoftheposi-
tioner Type 8696 are isolated or not actuated.
If the ambient air is humid, a hose can be connected
betweenpilotairoutlet22ofthepositionerandtheuncon-
nectedpilotairportofthethird-partydevice forcontrol
function A or control function B. As a result, the spring
chamberofthethird-partydevice is supplied with dry air
fromtheventductofthepositioner.
Control function
(CF)
Pneumatic connection
Type 8696 with third-party device
A
Processvalve
closed in rest
position
(byspringforce)
Pilot air outlet
21
22
1)
B
Processvalve
open in rest
position
(byspringforce)
Pilot air outlet
21
22
1)
Tab. 1: Pneumatic connection to third-party device
1) Connection optionally, see note.
6 TECHNICAL DATA
6.1 Conformity
InaccordancewiththeEUDeclarationofconformity,theposi-
tionerType8696iscompliantwiththeEUDirectives.
6.2 Standards
Theappliedstandards,whichverifyconformitywiththeEU
Directives,canbefoundontheEU-TypeExaminationCerticate
and/ortheEUDeclarationofConformity.
6.3 Licenses
Theproductisapprovedforuseinzone2and22inaccordance
withATEXdirective2014/34/EUcategory3GD.
Observeinstructionsonoperationinanpotentially
explosiveatmosphere(Exarea).ObservetheATEXaddi-
tional instructions.
TheproductiscULusapproved.InstructionsforuseintheUL
area see chapter “6.8Electricaldata”.
6.4 Operating conditions
WARNING!
Solar radiation and temperature uctuations may cause mal-
functions or leaks.
▶Ifthedeviceisusedoutdoors,donotexposeitunprotected
to the weather conditions.
▶Ensurethatthepermittedambienttemperaturedoesnot
exceedthemaximumvalueordropbelowtheminimum
value.
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Type 8696
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Technical data
Ambienttemperature seetypelabel
Degreeofprotection:
Evaluatedbythemanufacturer: EvaluatedbyUL:
IP65/IP67accordingtoEN
605292)
ULType4xRatingindoor
only2)
Operatingaltitude:  upto2000mabovesealevel
Relativeairhumidity  max.90%at55°C(noncondensing)
2) Only if cables, plugs and sockets have been connected correctly and
in compliance with the exhaust air concept, see chapter “8 Pneumatic
installation”.
6.5 Mechanical data
Dimensions See data sheet
Bodymaterial exterior:  PPS,PC,VA
interior:  PA6;ABS
Sealingmaterial  EPDM/FKM
Stroke range
ofvalvespindle  Series2103
and23xx  3–32mm
Third-partydevices
(modiedguide
elementrequired) 3–40mm
6.6 Type labels
6.6.1 Type label (example)
8696-E1-...-0PU02
Single act Pilot 0.6 24V
Pmax7bar
Tamb-10-+55°C
S/N1001
00123456
D-74653Ingelfingen
W15MA
CE
Identicationnumber;Date
ofmanufacture(encoded)
Max.operatingpressure
Type;Featuresofthetypecodeapplicable
to UL and ATEX Controlfunction;pilotvalve;
Supplyvoltagepilotvalve
Barcode
Serialnumber;CEmarking
Max.ambienttemperature
Fig. 4: Type label (example)
6.6.2 UL additional label (example)
E238179
Degreeofprotection
Circuit with limited power
Supplyvoltage
Type 4X enclosure
NECClass2only
PowerSupply:24V
max.3,5W
Power consumption
Fig. 5: UL additional label (example)
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Type 8696
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Technical data
6.7 Pneumatic data
Controlmedium:neutralgases,air
QualityclassesinaccordancewithISO8573-1
Dustcontent Class7: max.particlesize40µm,
  max.particledensity10mg/m³
Watercontent Class3: max.pressuredewpoint
-20°Cormin.10°Cbelowthe
lowest operating temperature
Oilcontent ClassX: max.25mg/m³
Temperature range
controlmedium:  -10–+50°C
Pressure range
controlmedium:  3–7bar
Airoutputofpilotvalve:  7lN/min(foraerationanddeaer-
ation)
(QNn-valueaccordingtodenition
forpressuredropfrom7to6bar
absolute)
Connections:
 23xx/2103(Element): Plug-inhoseconnector∅6mm/1/4“
SocketconnectionG1/8
Modelthird-partydevice: SocketconnectionG1/8
withM5connectionforconnecting
tothethird-partydevice
6.8 Electrical data
WARNING!
OnlycircuitswithlimitedpowermaybeusedforULapproved
componentsaccordingto“NECClass2”.
Connections   Circularplug-inconnector
(M12x1,8-pole)
Pilotvalve
 Supplyvoltage 24VDC±10%
  -max.residualripple10%
Powerinput  ≤3.5W
Input resistance
forset-pointvaluesignal 180Ωat0/4–20mA/
12bitresolution
Protectionclass  IIIasperDINEN61140(VDE0140-1)
Analoguepositionfeedback
max.loadforcurrentoutput
0/4–20mA  560Ω
Binaryinput   0–5V=log“0”,
12–30V=log“1”
invertedinputinreverseorder
Communications
interface     DirectconnectiontoPCviaUSB
adapterwithintegratedinterface
driver,communicationwithcommu-
nicationssoftware.
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Type 8696
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Installation
6.9 Factory settings of the positioner
FunctionscanbeactivatedviaDIPswitches:
Function Parameter Value
CUTOFF Sealingfunctionbelow
Sealingfunctionabove
2%
98%
CHARACT Select characteristic FREE3)
DIR.CMD Eectivedirectionset-point
value
rise
Tab. 2: Factory settings - functions
Additionalfunctionsaredescribedintheoperating
instructions Type 8696.
TheseinstructionscanbefoundontheInternetat
www.burkert.com.
3)
without change to the settings via the communications software a
linear characteristic is stored in FREE.
7 INSTALLATION
Onlyforpositionerwithoutpre-assembledprocessvalve.
7.1 Safety instructions
DANGER!
Risk of injury from high pressure in the equipment/device.
▶Beforeworkingonequipmentordevice,switchothepressure
anddeaerate/drainlines.
Risk of electric shock.
▶Beforeworkingonequipmentordevice,switchothepower
supplyandsecuretopreventreactivation.
▶Observeapplicableaccidentpreventionandsafetyregulations
forelectricalequipment.
WARNING!
Risk of injury from improper installation.
▶Installationmaybecarriedoutbyauthorizedtechnicians
only and with the appropriate tools.
Risk of injury from unintentional activation of the system and
an uncontrolled restart.
▶Securesystemfromunintentionalactivation.
▶Followingassembly,ensureacontrolledrestart.
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Type 8696
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Installation
7.2 Installation of the positioner on process
valves of series 2103 and 23xx
NOTE!
When mounting on process valves with a welded body,
follow the installation instructions in the operating instruc-
tions for the process valve.
Whenthepositionerisbeinginstalled,thecolletsofthe
pilotairportsmustnotbettedtotheactuator.
NOTE!
Damaged printed circuit board or malfunction.
▶Ensurethatthepuckissituatedatontheguiderail.
→Align the puck and the positioner until
1. thepuckcanbeinsertedintotheguiderailofthe
positioner (see “Fig.6”) and
2. theconnectionpiecesofthepositionercanbeinserted
intothepilotairportsoftheactuator(seealso“Fig.7”).
Guiderail
Puck
Connection
pieces
Fig. 6: Aligning the puck
→Pushthepositioner,withoutturningit,ontotheactuatoruntil
nogapisvisibleontheformseal.
NOTE!
Too high torque when screwing in the fastening screw does
not ensure protection class IP65 / IP67.
▶Thefasteningscrewsmaybetightenedtoamaximum
torqueof1.5Nmonly.
→Attachthepositionertotheactuatorusingthetwosidefas-
teningscrews.Indoingso,tightenthescrewsonlyhand-tight
(max.torque:1.5Nm).
Connection
pieces
Pilot air
ports
(actuator)
Fastening
screws
max.1.5Nm
Fig. 7: Installation of positioner, 2103 and 23xx series
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Type 8696
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Pneumatic installation
8 PNEUMATIC INSTALLATION
DANGER!
Risk of injury from high pressure in the equipment/device.
▶Beforeworkingonequipmentordevice,switchothepressure
anddeaerate/drainlines.
Procedure:
→Connect the control medium to the pilot air port (1)
(3–7bar;instrumentair,freeofoil,wateranddust).
→Attachtheexhaustairlineorasilencertotheexhaustairport
(3)
(see “Fig.8:Pneumaticconnection”).
Keeptheadjacentsupplypressurealways atleast0.5–
1barabovethepressurewhichisrequiredtomovethe
actuator to its end position. This ensures that the control
behaviorisnotextremelynegativelyaectedintheupper
strokerangeonaccountoftoolittlepressuredierence.
During operation keep the uctuations of the pressure
supplyaslowaspossible(max.±10%).Ifuctuationsare
greater,thecontrolparametersmeasuredwiththeX.TUNE
functionarenotoptimum.
Importantinformationfortheproblem-freefunctioningof
thedevice:
▶Theinstallationmustnotcausebackpressuretobuild
up.
▶Select a hose for the connection with an adequate
cross-section.
▶Theexhaustairlinemustbedesignedinsuchawaythat
nowaterorotherliquidcangetintothedevicethrough
theexhaustairport.
Pilot air port
(label:1)
Exhaustairport
(label:3)
Fig. 8: Pneumatic connection
Caution: (Exhaustairconcept):
IncompliancewithprotectionclassIP67,anexhaustair
linemustbeinstalledinthedryarea.
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Type 8696
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Electrical installation
9 ELECTRICAL INSTALLATION
Allelectricalinputsandoutputsofthedevicearenotgalvanically
isolatedfromthesupplyvoltage.
9.1 Safety instructions
DANGER!
Risk of electric shock.
▶Beforeworkingonequipmentordevice,switchothepower
supplyandsecuretopreventreactivation.
▶Observeapplicableaccidentpreventionandsafetyregulations
forelectricalequipment.
WARNING!
Risk of injury from improper installation.
▶Installationmaybecarriedoutbyauthorizedtechnicians
only and with the appropriate tools.
Risk of injury from unintentional activation of the system and
an uncontrolled restart.
▶Securesystemfromunintentionalactivation.
▶Followinginstallation,ensureacontrolledrestart.
Minimumtemperatureratingofthecabletobeconnectedtothe
eldwiringterminals:75°C
9.2 Electrical installation with circular
plug-in connector
→Connectthepositioneraccordingtothetable.
6
1
7
54
3
2
8
Fig. 9: Circular plug M12 x 1, 8-pole
Input signals of the control center (e.g. PLC)
Pin Wire
color3) Conguration External circuit / signal level
1
2
white
brown
Set-pointvalue
+
(0/4–20mA)
Set-pointvalue
GND
1
2
+(0/4–24mA)
GND
5
6
grey
pink
Binary input +
Binary input
GND
5+ 0–5V(log.0)
10–30V(log.1)
6GND
Tab. 3: Pin assignment - input signals of the control center
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Type 8696
16
Start-up
Operating voltage
Pin Wire
color4) Conguration External circuit
3
4
green
yellow
GND
+ 24 V
3
4
24VDC±10%
max.residual
ripple10%
Tab. 4: Pin assignment - operating voltage
Output signals to the control center (e.g. PLC) - (required for
analogue output option only)
Pin Wire
color4) Conguration External circuit / signal level
8
7
red
blue
Analogue
position
feedback+
Analogue
position
feedbackGND
+(0/4–24mA)
8
7GND
Tab. 5: Pin assignment - output signals of the control center - option
Whenthesupplyvoltageisapplied,thepositionerisoperating.
→Actuatetheautomaticadjustmentofthepositioner,as
describedinthechapterentitled“10.2 Automatic adjustment
X.TUNE”.
4) The indicated colors refer to the connecting cable available as an
accessory (919061).
10 START-UP
10.1 Safety instructions
WARNING!
Risk of injury from improper operation.
Improper operation may result in injuries as well as damage to
thedeviceandtheareaaroundit.
▶Beforestart-up,ensurethattheoperatingpersonnelare
familiarwithandcompletelyunderstandthecontentsofthe
operating instructions.
▶Observethesafetyinstructionsandintendeduse.
▶Only adequately trained personnel may operate the equip-
ment/thedevice.
10.2 Automatic adjustment X.TUNE
Toadjustthepositionertolocalconditions, the X.TUNE
functionmustberunfollowinginstallation.
WARNING!
Danger due to the valve position changing when the X.TUNE
function is running.
When the X.TUNEisrunningunderoperatingpressure,thereis
anacuteriskofinjury.
▶NeverrunX.TUNE while a process is running.
▶Takeappropriatemeasurestopreventtheequipmentfrom
beingaccidentallyactuated.
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Type 8696
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Start-up
NOTE!
Avoid maladjustment of the controller due to an incorrect
pilot pressure or applied operating medium pressure.
▶Run X.TUNE wheneverthepilotpressure(=pneumaticaux-
iliaryenergy)isavailableduringsubsequentoperation.
•RuntheX.TUNEfunctionpreferablywithoutoperatingmedium
pressuretoexcludeinterferencecausedbyowforces.
To run X.TUNE,thepositionermustbeintheAUTOMATIC
operatingstatus(DIPswitch4=OFF).
NOTE!
Breakage of the pneumatic connection pieces due to rota-
tional impact.
▶When unscrewing and screwing in the transparent cap, do
notholdtheactuatoroftheprocessvalvebuttheconnection
housing.
Body casing
Connection housing
Actuator
Transparent cap
Fig. 10: Open positioner
→Screwothetransparentcapofthepositionertooperatethe
keys and DIP switches.
DIP Switches
Key2
Key1
LED 1
LED 2
Fig. 11: Starting X.TUNE
→Start the X.TUNEbypressingkey15)for5s.
While the X.TUNEisrunning,LED1ashesquickly(green).
Whentheautomaticadjustmentiscomplete,LED1ashesslowly
(green)6).
Thechangesareautomaticallytransferredtothememory(EEPROM)
providedtheX.TUNE functionissuccessful.
5) The X.TUNE can also be started via communications software.
6) if a fault occurs, LED 1 is lit red.
NOTE!
Breakage of the pneumatic connection pieces due to rota-
tional impact.
▶When unscrewing and screwing in the transparent cap, do
notholdtheactuatoroftheprocessvalvebuttheconnection
housing.
Damage or malfunction due to penetration of dirt and
humidity.
▶ToobservedegreeofprotectionIP65/IP67,screwthetrans-
parent cap in all the way.
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Type 8696
18
Start-up
→Closethedevice(assemblytool:6740787)).
7) The assembly tool (674078) is available from your Bürkert sales oce.
10.3 Control and display elements
Adetaileddescriptionoftheoperationandfunctionsof
thepositionerandthecommunicationsoftwarecanbe
foundintherespectiveoperatinginstructions.
NOTE!
Breakage of the pneumatic connection pieces due to rota-
tional impact.
▶When unscrewing and screwing in the transparent cap, do
notholdtheactuatoroftheprocessvalvebuttheconnection
housing.
Body casing
Connection housing
Actuator
Transparent cap
Fig. 12: Open positioner
→Screwothetransparentcapofthepositionertooperatethe
keys and DIP switches.
DIP switches
Key2
Key1
LED 1
LED 2
Communica-
tionsinterface
Fig. 13: Description of the control elements
NOTE!
Breakage of the pneumatic connection pieces due to rota-
tional impact.
▶When unscrewing and screwing in the transparent cap, do
notholdtheactuatoroftheprocessvalvebuttheconnection
housing.
Damage or malfunction due to penetration of dirt and
humidity.
▶ToobservedegreeofprotectionIP65/IP67,screwthetrans-
parent cap in all the way.
→Closethedevice(assemblytool:6740788)).
8) The assembly tool (674078) is available from your Bürkert sales oce.
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Type 8696
19
Start-up
10.3.1 Operating status
AUTOMATIC (AUTO)
NormalcontrollermodeisimplementedandmonitoredinAUTO-
MATIC operating state.
LED1ashesgreen.
MANUAL(MANU)
InMANUALoperatingstatethevalvecanbeopenedandclosed
manuallyviathekeys.
LED1ashesred/greenalternately.
ON DIP
12 3 4
The DIP switch 4 can be used to switch
betweenthetwooperatingstatesAUTOMATIC
andMANUAL.
DIP switches Function
4ON OperatingstatusMANUAL(MANU)
OFF Operating status AUTOMATIC (AUTO)
Tab. 6: DIP switches
10.3.2 Functions of the keys
Thecongurationofthe2keysontheboardvariesdependingon
theoperatingstatus(AUTOMATIC/MANUAL).
Key2
Key1
Fig. 14: Keys
MANUALoperatingstatus(DIPswitch4settoON):
Key Function9)
1Aerate(manuallyopen/closetheactuator)10)
2Deaerate(manuallyopen/closetheactuator)10)
Tab. 7: Conguration of the keys for MANUAL operating status
AUTOMATICoperatingstatus(DIPswitch4settoOFF):
Key Function
1Pressfor5stostarttheX.TUNEfunction
2-
Tab. 8: Conguration of the keys for AUTOMATIC operating status
9) No function if the binary input was activated with the “Manual/Auto
change-over” via the communications software.
10) depending on the operating principle of the actuator.
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Type 8696
20
Start-up
10.3.3 Function of the DIP switches
DIP
switches Function
ON DIP
12 3 4
1ON Reversaloftheeectivedirectionoftheset-point
value(set-pointvalue20–4mAcorrespondsto
position0–100%),descending(DIR.CMD)
OFF Normaleectivedirectionoftheset-pointvalue
(set-pointvalue4–20mAcorrespondsto
position0–100%),ascending
2ON Sealingfunctionactive.Thevalvecompletely
closesbelow2%10)andopensabove98%ofthe
set-pointvalue(CUTOFF)
OFF Nosealingfunction
3ON Correctioncharacteristicforadjustmentofthe
operatingcharacteristic(linearizationofthe
process characteristic CHARACT)11)
OFF Linear characteristic
4ON OperatingstatusMANUAL(MANU)
OFF Operating status AUTOMATIC (AUTO)
Tab. 9: DIP switches
11) Can be changed via communications software.
10.3.4 Display of the LEDs
LED 1
LED 2
Fig. 15: Display of the LEDs
LED 1
(green/red)
Displayof
AUTO,MANU,X.TUNE and FAULT
LED 2
(green/yellow)
Displayofstateofactuator
(open,closed,opensorcloses)
english
Type 8696
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Burkert 8696 User manual

8696
Burkert
Brand
Burkert
Model
8696
Type
User manual

Burkert 8696 is an electropneumatic position controller that can be used for process control tasks. It is designed for use with single-acting actuators and allows for precise positioning of pneumatic control valves. With its automatic adjustment feature, it can self-calibrate to the attached actuator, making it easy to set up and maintain. Additionally, the 8696 has safety positions that can be configured to fail-open or fail-closed in case of a power or air supply failure.

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