DOLD VARIMETER IMD RN 5897/321 User manual

112.07.22 en / 604A
0280968
Your Advantages
• SuitableforDCchargingstationsforelectricvehiclesacc.to
 IEC/EN61851-23:2014/AC:2016-06
• InsulationmonitoringaccordingtoIEC/EN61557-8
• Universalapplicationinnon-earthedAC-,DC-,AC/DCnetworks
 uptoACmax.250Vresp.DCmax.300V
• ConnectionofanexternalcouplingdeviceRL5898
forvoltagesuptoAC400V/DC500Vor
RP5898forvoltagesuptoAC690V/DC1000Vpossible
• Extendedoperatingtemperaturerangeof-40...+70°C
• Veryfastreactiontime≤1s
• Optimisedinsulationresistancemonitoringalsoduring
 mainsvoltagevariation
• Self-testeveryfulloperatinghours
• Preventivereandsystemprotection
• Detectionofsymmetricandasymmetricinsulationfaults
• EasyadjustmentofresponsevaluesandsettingparameterviaModbus
• Suitableforlargeleakagecapacitancesupto5µF
• Monitoringalsowithvoltage-freemains
• MeasuringcircuitL(+)/L(-)withbrokenwiredetection(canbeswitchedoff)
• ProtectiveconductorPE1/PE2withbrokenwiredetection
 (can'tbeswitchedoff)
• WithgalvanicseparatedModbusRTUinterface
Features
• 2separateadjustableresponsethresholds
 (usinge.g.forpre-alarmandAlarm)
• Settingrangeof1stresponsevalue(Pre-alarm):20kΩ…500kΩ
• Settingrangeof2ndresponsevalue(alarm):1kΩ…100kΩ
• 1changeovercontactseachforinsulationfailures-Pre-alarmand-alarm
• Energizedorde-energizedontripcanbeselectedforindicatorrelay
• WithmulticolourstatusLEDtoindicatethestateofoperation.
• Automaticandmanualdeviceself-test
• Alarmstorageselectable
• Protectionagainstmanipulationbysealabletransparentcover
• Externalcontrolinputforcombinedtest-/reset-button
 withadditionalStopofthemeasuringfunction
• 2widevoltageinputforauxiliaryvoltage
• Width52.5mm
Product Description
Approvals and Markings
Applications
Insulationmonitoringof:
• Non-earthedAC,DC,AC/DCnetworks
• DCchargingstationsforelectricvehicles
• UPSsystems
• Networkswithfrequencyinverters
• Batterynetworks
• Networkswithdirectcurrentdrives
• Hybridandbattery-poweredvehicles
• Mobilegeneratorsets
Monitoring Technique
VARIMETER IMD
Insulation monitor
RN 5897/321
RN5897/321 RP5898
Couplingdevices
RL5898
The insulation monitor RN 5897/321 of the VARIMETER IMD family
providesbestanduptodateinsulationmonitoringofmodernITsystems
inanoptimumandstateoftheart wayfulllingtherelevantstandards.
The device can be used in the most exible way for AC, DC and AC/
DCsystems. Mains areas ofapplicationsarenon-earthed DC charging
stationsforelectric vehicleswithmainsvoltagesuptoDC1000V,that
needanextendedtemperaturerange.Thesettingoftheparametersand
the switching values is done via Modbus. All measured values, device
statusesandparameterscanalsobereadoutviaModbus.Allfunctions
ofthedevicecanalsobeoperatedviaModbus.Theoperatingstatus is
indicateduserfriendlyviaamulticolourLED.Withasealabletransparent
coverthedeviceisprotectetagainstmanipulation.
AC/DC
Connection Terminals
Terminal designation Signal description
A1(+),A2 AuxiliarxvoltageACorDC
L(+),L(-),VSG1,VSG2 Connectionforcouplingdevice
PE1,PE2 Connectionforprotectiveconductor
X1,X2
Controlinput
(combinedexternalTest-andReset-input
withadditionalStopofthemeasuring
function)
11,12,14 AlarmsignalrelayK1(1changeovercontact)
21,22,24 PrewarningsignalrelayK2(1changeover
contact)
Circuit Diagram
X1 X2
11 12 14 21 22 24 PE1 PE2
A2
A1(+) L(+)VSG1 VSG2 L(-)
22
12
L(+) L(-)
24
14
21
PE2
11
PE1
UH
M11956_a
Translation
of the original instructions
AllTechnicalDatainthislistrelatetothestateatthemomentofedition.Wereservetheright
fortechnicalimprovementsandchangesatanytime.

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ThedeviceissuppliedwithDCauxiliaryvoltageviaterminalsA1(+)/A2.
Switchingontheauxiliaryvoltage(Power-On)isfollowedbyaninternal
self-testfor12s(see„Devicetestfunctions“).Thetestprocessisvisible
withthestatusLED.Afterthis,measurementoftheinsulationresistance
inthemeasuringcircuitsbeginsandthestatusLEDchangesintogreen.
Measuring circuit
(Insulation measurement between terminals L(+)/L(-) and PE)
TheinsulationmonitorRN5897/321canonlybeusedwithacoupling
d e v i c e . M a x . m a i n s v o l t a g e a n d c o n n e c t i o n d i a g r a m s h a ve t o b e o b s e r v e d !
To connecttheinsulationMonitorRN5897/320toacouplingdevicethe
terminalswithidenticaldesignationsareconnected(VSG1/L(+)andVSG2,
L(-)).ThevotagesystemtobemonitoredisconnectedtoL(+)andL(-)of
thecouplingdevice.
Thetypeofthevoltagesystemortheconnectionmethod(AC,DC,3NAC)
hastobecorrectlyadjustedviaModbus.
AlsotheterminalsPE1andPE2havetobeconnectedwith2separate
wirestotheprotectiveearth.Aninterruptionofawirealsocausesafault
signal(seesection”Behavioronfaultyconnection”).Themonitoringof
thePEconnectioncannotbede-activated.
Tomeasuretheinsulationresistanceanactivemeasuringvoltagewith
changingpolarityisconnectedbetweenL(+)/L(-)andPE1/PE2.
Attheendofameasuringcycletheactualinsulationresistanceisproduced
and indicated. Therelaysfor alarm K1 andpre-alarm K2switch when
droppingundertheadjustedresponsevalues.InadditionthestatusLED
changestoorangecoloronpre-alarmortoredcoloronalarm.
ThecurrentmeasuredvalueisoutputviaModbus.Anasymetricinsulation
r e s i s t a n c e a g a i n s t „ + “ o r „ - “ i sa l s o o u t p u t v i a M o d b u s ( o n l y w i t hD C n e t w o r k s 
resp.insulationfaultsontheDCside).
Manual reset of fault message
T h e m a n u a l r e s e t o f i n s u l a t i o n f a u l t m e s s a g e s c a n b e s e t v i a M o d b u s ( a l a r m 
memory).Ifthemanualresetisactivated,theinsulationfaultsignalsofthe
measuringcircuitremainsavedwhentheadjustedresponsevalueisnot
reached,eveniftheinsulationresistancelatergoesbacktohealthystate
again.Theminimumvalueoftheinsulationresistanceisstoredandcan
bereadoutviaModbus.Pressingthe„Reset“buttononthefrontsidefor
2s,thealarmsignalandthestoredminimumvalueareresetiftheactual
insulationresistanceisinhealthystate.
ThedevicecanalsoberesetwithaModbuscommand.
Indicator relay for insulation fault signal
FortheindicatorrelaysK1(contacts11-12-14,foralarm)andK2(contacts
21-22-24,forpre-alarm)thefunctioncanbesetviaModbustoenergized
ontriporde-energizedontrip.Whenenergisedontriptherelaysenergize
whenthevaluedropsbelowthesetting,whende-energisedontrip,the
relaysde-energizewhenthevaluedropsbelowthesetting.Thestatusof
theindicatorrelaysisalsoshownviaModbus.
Disable the measuring function
Using the external control input X1/X2 or via Modbus command the
measuringfunctionoftheRN5897/321canbedisabled.Thiscouldbe
used when several isolated voltage systems with individual insulation
monitorsneedtobecoupled.
Themeasuringvoltageissetto-90V(negativemeasuringphase)and
theevaluationofthemeasurementisstopped.Theoutputrelaysswitch
accordingtothecurrentmeasuredvalues.Ifthemeasurementisdisabled
thestatusLEDashescontinuouslyorange.Pleasebeaware, onlythe
evaluationofthemeasurementisstoppedandthemeasuringpulseis
interrupted! A high resistive disconnection to PE does not take place
(seeinternalresistance).
Broken wire detection
Asdescribedinsection"Measuringcircut",themeasuringcircuitsL(+)/
L(-)andtheprotectiveconductorsPE1/PE2areconstantlymonitoredfor
wirebreaks–notonlyatPower-Onoramanualoroccasionalautomatic
test.TheresponsetimeofPE1/PE2monitoringisonlyafewseconds.The
responsetimeofmonitoringofL(+)/L(-)canbeuptoapprox.2min.Broken
wire detection between L(+)/L(-) is performed via coupled alternating
voltage. This alternating voltage is short-circuited if the terminals are
connectedtotheconnectedmainsatlow-resistance.Thedevicedetects
thatthemainstobemonitoredisproperlyconnected.
S i n c e t h i s b r o k e n w i r e d e t e c t i o n i s c a r r i e d o u t w i t h a l t e r n a t i n g v o l t a g e , l a r g e
capacitancesshouldbeavoidedbetweenL(+)/L(-),sincethecapacitive
reactanceofthesecapacitancesalsoshort-circuitsthisalternatingvoltage.
ThedevicewouldnolongerdetectaconnectionfaultonL(+)/L(-).
Especiallyparallellinesshouldbepreventedoverlargerdistances.
I fl a r g er c a p a c i t an c e s b e t we e n L( + ) / L ( - ) c a nn o tb e av o i d e do r i ft h e co u p l e d
alternatingvoltageinterfereswiththesystem,thebrokenwiredetectioncan
bede-activatedviaModbus.Monitoringdeactivated,monitoringonlyduring
device test or continuous monitoring (every 2 minutes for 10 s) are the
possibleoptions.IfthebrokenwiredetectiononL(+)/L(-)isde-activated
noACvoltageisinjected.ThebrokenwiredetectiononPE1/PE2cannot
bede-activated.
Device test functions
Principally,2differenttestfunctionsareimplemented:The"self-test"and
the"expandedtest":
Theself-testofthedeviceisper formedautomaticallyafterPower-Onand
ev er y fu ll op er at in gh ou r s.Itc an al sob et ri gg er ed ma nu al ly at anyt im eb y
p r e s s i n g t h e" Te s t " b u t t o n a t t h ed e v i c e f r o n t fo r 2 s o rv i a M o d b u s c o m m a n d .
W it ht hes el f- te st ,c on tr ar yt ot he ex pa nd edt es t, th es ta tu so ft heI nd ic ato r
relaysisnotaffected;thesequenceisasfollows:
T h e s e l f t e s t i s i n d i c a t e d b y t h e s t a t u s L E D w i t h  a s h c o d e 1 i n o r a n g e c o l o u r. 
Additionally,itisoutputviaModbusthatthedeviceisintestmode.First
thenegativemeasuringpulesisactivatedforabout5sandtheinternal
measuring circuit is checked on failures. Then the positive measuring
pulseisactivatedforabout5sandmoreinternaltestsareperformed.Ifno
failuresaredetected,thenormalmeasurementcontinuous.Theextended
testisstarted, whenduringorat theendofaboveprocedure(12s) the
button"Test"ispressedagainfor2sortriggeredviaaModbuscommand.
Theproce dureisthesameasabove( 2measuringphaseswith5seceach)
butinadditiontheoutputrelaysK1andK2gointoalarmstate.TheStatus
LEDshowsashc ode2inorang ecolourandviaModbusitissignalledthat
thedeviceisinextendedtestmode.Thetestphaseswillbecontinuously
repeated. The extended test can be nished after the rst complete
sequence(approx.10sec)bypressingthe"reset"buttonfor2seconds.
Thedevicestartstheinsulationmonitoringagain.Theextendedtestcan
alsobeendedviaaModbuscommand.
Test signal 1)
Reset signal 2)
Relay state K1 and K2
Measuring voltage
Positive
Alarm
No Alarm
Insulation
measurement Insulation
measurement
Insulation
measurement
3)
4)
Self test (Test 1)
Duration: approx. 12s
Self test (Test 1)
Duration: approx. 12s
Duration: approx. 10s
Continuous extended
test (Test 2)
Negative
M12462
U
t
1)Testsignal:ButtonTest>2sorX1/X2>1.5sand<10sor
viaModbuscommand
2)Resetsignal:ButtonReset>2sorX1/X2<1.5sor
viaModbuscommand
3)Toinitiatetheextendedtest(Test2)thetestsignalmustbeoperated
withintheselftest(Test1)again.
4)Theresetsignalhasherenofunction,astherstcompletesequence
ofextendedtest(Test2)isnotnished.
FunctionFunction

312.07.22 en / 604A
Function Diagram
Manual reset
Alarm
Alarm Pre-Alarm Pre-Alarm
Hysteresis function
Reset
21-24
21-24
21-24
21-24
11-14
11-14
11-14
11-14
11-12
11-12
11-12
11-12
Earth fault
E
R
A
RpA
R
21-22
21-22
21-22
21-22
t
t
Open circuit operation
Open circuit operation
Open circuit operation
Open circuit operation
De-energized on trip
De-energized on trip
De-energized on trip
De-energized on trip
UH
M11593
Behaviour with internal device faults
Ifinternaldevicefaultsweredetectedduringthetestfunction,thestatus
LEDasheswithashcode3.TheindicatorrelaysK1andK2switchto
thealarmstate.ThedevicefaultsarealsoindicatedviaModbus.
Behavior on faulty connection
WhendetectingbrokenwireonterminalsL(+)/L(-),themeasurementis
disabled.Thereactiontimecouldbeupto2min.Themonitoringrelays
K1andK2goinalarmstate,thestatusLEDshowsashcode1inred
colour. After removing the interruption the fault is automatically reset
(max.reactiontimeupto2min)andthemeasurementoftheinsulation
r e s i s t a n c e i s c o n t i n u e d . S t o r e d a l a r m v a l u e sr e m a i n s t o r e d . A n i n t er r u p t i o n 
oftheprotectiveearthconnectionsPE1/PE2causesthesamereactionas
interruptingthemeasuringcircuit,onlythestatusLEDshowsashcode
2inredcolour.BrokenwiredetectiononterminalsL(+)/L(-)andPE1/PE2
arealsoindicatedviaModbus.
External control input
To terminals X1/X2 an external combined Test-/Reset button can be
connected.IftheterminalsX1/X2arebridgedforapprox. >1,5sand<
10s thetestmodeisstarted.Thishasthesamefunctionaspressingthe
internaltestbutton.WhenbridgingX1/X2for <1,5s ,astoredalarmwill
bereset.Thishasthesamefunctionaspressingtheinternalresetbutton.
IfX1/X2isactivatedfor>10s,themeasuringfunctionisstopped.
Themeasuringfunctionremainssuspendedforthedurationofthecontrolof
X1/X2.ThemeasuringfunctioncanalsobestoppedviaModbuscommand.
Connection of an external coupling device
Anexternalcouplingdevice(VSG)RL5898orRP5898canbeconnected
to extend the input voltage range of the monitored voltage system on
RN5897/321.Theterminalswiththesamelegendoftheinsulationmonitor
andthecouplingdeviceRL5898orRP5898(VSG1,VSG2,L(+),L(-))are
connectedtogether.
ThenetworktobemonitoredisconnectedtoterminalsL1(+)undL2(-)onthe
couplingdevice.UsingthedisplaymenuinprogrammingmodeorviaModbus
theconnectionofthecouplingdevicehastobeselectedandactivated.The
brokenwiredetectionisactiveontheterminalsL1(+)/L2(-)onthecoupling
device.Abrokenwirebetweencouplingdeviceandinsulationmonitorcannot
bedetectedimmediatelybutthemeasuredvaluesoninterruptionof1or2
wiresbetweencouplingdeviceandinsulationmonitoraremuchlowerasthe
realvalues,whichwillcauseanearlyresponseofthedevice.
Programming/setting of parameters/set-up of the insulation monitor
A l l s e t t i n g s a r e m a d e v i a M a o d b u s . I t i s p o s s i b l e t o a d j u s t t h e r e s p o n s e v a l u e s 
foralarmandpre -alarm,therelayoperationprinc iple,thealarmmemor y,the
brokenwiredetection,thetypeofnetworkconnectionandtheactivation/
deactivationofthecouplingdevice.ThesettingoftheModbusaddressand
baudrateisdoneviathethreerotaryswitchesonthefrontofthedevice.
Thersttworotaryswitches("Adr10"and"Adr1")settheModbusaddress
between1and99instepsof10and1,thethirdrotaryswitch(“Baud”)sets
thebaudrate.
Possiblesettingvaluesare:
Position
potentiometer
Baud
123 4 5 678
Baudrate
kBaud 1.2 2.4 4.8 9.6 19.2 38.4 57.6 115.2
To avoidunauthorized manipulation,all three rotaryswitchesarelocated
behindasealabletransparentcover.
Function
For communication between motor controller and a supervising control
theModbusRTUprotocolaccordingtoSpecicationV1.1b3isused.
Modbus RTU

412.07.22 en / 604A
Indicators
RN5897/321
Indicators
Theoperationalstatusofthedeviceisindicatedona3-colourLED:
Off:   Noauxiliaryvoltageconnected
Green:   Normaloperation(Insulationresistanceinhealthy
state)
Red:   Alarm(measuredvaluebelowalarmresponsevalue)
Orange:  Warning(measuredvaluebelowpre-alarmresponse
value)
Orange flashing: Testmode/Measurementstoppedprocedure
(seetableashingcode)
Red flashing: Failurecode(seetableashingcode)
Flash code
orange
Status-LED
Description
1
Selftest
(measuringcircuit,measuringvoltage,
internaltests)
2AdvancedTest
(additionalcontrolofindicatorrelays)
continously
ashing Measuringfunctionstopped
Error Indication
Flash code
red
Status-LED
Failure cause Failure recovery
1Brokenwiredetection
onL(+)/L(-).
Check
measuringcircuit
L(+)andL(-)
2Brokenwiredetection
onPE1/PE2.
Check
protectiveearth
connections
PE1andPE2
3
Internalfailure
detectedin
testmode
Presstestbuttonagainorrestart
theunitbyinterruptingthe
auxiliarysupplytemporarily.Ifthe
faultremainspermanent,send
devicebacktomanufacturerfor
examination.
9Modbustimeout
detected
LockModbustimeout,
extendtimeouttime,oradjust
communicationwiththemaster.
10
Faultycalibration
valuesdetectedin
devicememory.
Senddevicebacktomanufacturer
forrecalobrationandexamination.
11
Internal
communicationerror
occured
Restarttheunitbyinterruptingthe
auxiliarysupplytemporarily.
Ifthefaultremainspermanent,
senddevicebacktomanufacturer
forexamination.
12 Internalsoftwareerror
occured
Restarttheunitbyinterruptingthe
auxiliarysupplytemporarily.
Ifthefaultremainspermanent,
senddevicebacktomanufacturer
forexamination.
Connection
measuring ciruit or
coupling device
Auxiliary
voltage
Indicator relay
alarm and system error
Protective
conductor
External
control input
M12498_c

512.07.22 en / 604A
Notes
WARNING
Risk of electrocution!
Danger to life or risk of serious injuries.
• Disconnectthesystemanddevicefromthepowersupplyandensure
 theyremaindisconnectedduringelectricalinstallation.
• Thedisplayofthevoltageisnotinrealtime.TheValueonthedisplayis
updatedattheendofameasuringcycle.Theabsenceofvoltageofthe
systemandthedevicehavetobecheckedwithsuitablemeasuringdevices!
• TheterminalsofthecontrolinputX1-X2havenogalvanicseparationto
themeasuringcircuitL(+)/L(-)andareelectricallyconnectedtogether,
t h e r e f o r e t h e yh a ve t o b e c o n t r o l l e d by v o l tf r e e c o n t a c t s o rb r i d g e . T h e s e 
contactsorebridgesmustprovideasufcientseparationdepending
onthemainsvoltageonL(+)/L(-).
• PleasedonotconnectexternalvoltagetoterminalsX1/X2.Thecontrol
mustonlybemadebybridgingX1andX2.
• Thecouplingunit RL5898orRP5898 mustonlybeusedinconjunction
withtheRP5897/321onavoltagesystemandnotjustbyitself.
!
Attention!
• Beforecheckinginsulationandvoltage,disconnectthemonitoringdevice
 RN5897/321fromthepowersource!
• Inonevoltagesystemonlyoneinsulationmonitorcanbeused.Thishas
 tobeobservedwheninterconnectingtwoseparatesystems..
• DeviceterminalsPE1andPE2mustalwaysbeconnectedviaseparate
 linestodifferentterminalpointsoftheprotective-conductorsystem.
• ThedevicemustnotbeoperatedwithoutPE1/PE2connection!
• If telegrams fail in the bus communication due to EMC interference,
groundingthebuscablescreening onboth sidescould bea remedy.
Withthisearthing,attentionmustbepaidtopossiblyoccuringequalizing
currents,which could occur with largerpotential differencesbetween
thebusparticipants.
nfo
Attention!
• T h e m a i n m e a s ur i n g c i r c u i t c a n b e c o n n e c t e d w i t h i t st e r m i n a l s L (+ ) a n d 
L(-)bothtotheDCandalsoACsideofamixednetwork;itisdonemost
practicallywheretheprimaryincomingpowersupplytakesplacee.g.
withbatterynetworkswithconnectedinvertersontheDCside,with
Generators/TransformerswithconnectedRectiersorinvertersonthe
AC-side.Tomonitora3NACsystemthedevicecanbeconnectedsingle
pole,(L(+)andL(-)arebridged,totheneutralofthe3p4wsystem.The
3phaseshavealow-Ωic(approx.3–5Ω)connectionviathetransfor-
merwindingssoalsoinsulationfailuresofthenotdirectlyconnected
phasesaredetected.ViaModbusthecorrecttypeofnetworkmustbe
selected(see„ConnectionExamples“).
• IfamonitoredACsystemincludesgalvanicallyconnectedDCcircuits
(e.g.viaarectier),aninsulationfailureontheDCsidecanonlybe
detectedcorrectly,whenacurrentofmin10mAcanowviathesemi-
conductorconnections.
• IfamonitoredDCsystemincludesgalvanicallyconnectedACcircuits
(e.g.viaaninverter),aninsulationfailureontheACsidecanonlybe
detectedcorrectly,whenacurrentofmin10mAcanowviathesemi-
conductorconnections.
• FortheregisteroftheInsulatingresistancethevalue0xFFFFistransmitted
viaModbusifRE>2MΩ.Ifnovalidmainsvoltagevaluewasmeasured
orthemainsvoltageis<5V,thevalue0xFFFFistransmittedforthe
registerofthemeasuredmainsvoltageviaModbus.(SeeParametertable).

612.07.22 en / 604A
Auxiliary voltage input A1(+)/A2
Nom. Voltage Voltage range Frequency range
AC/DC24...60V AC19...68V 45…400Hz;DC48%W*)
DC19...96V W*)≤5%
AC/DC100...230V AC70...276V 45…400Hz;DC48%W*)
DC80...300V W*)≤5%
*)W=Permittedresidualrippleofauxiliarysupply
Nominal consumption:
DC12V,24V,48V: Max.3W
AC230V: Max.3.5VA
Control input X1/X2 for external combined Test-/Reset-Taste

Current flow: Approx.3mA
No-load operation voltage
X1 to X2: Approx.12V
Permissible wire length: <50m
Activat. time t for test signal: 1.5s<t<10s
Activat. time t for reset signal:t<1.5s
Activation time t for stop
of the measuring function: t>10s
Outputs
 
Indicator contact: 2x1changeovercontactforAlarm(K1)
 andPre-Alarm(K2)
 energizedorde-energizedontrip
 (programmable)
Thermal current Ith: Max.4A
 (seealsotemperaturerangeoperation)
Switching capacity
ToAC15:
NOcontact: 5A/AC230V IEC/EN60947-5-1
NCcontact: 2A/AC230V IEC/EN60947-5-1
ToDC13: 2A/DC24V IEC/EN60947-5-1
Electrical life
At5A,AC230V: 1x105switchingcycles
Short circuit strength
Max. fuse rating: 4AgG/gL  IEC/EN60947-5-1
Mechanical life: 50x106switchingcycles
General Data

Operating mode: Continuousoperation
Temperature range
Auxiliaryvoltage
AC/DC24...60V: -40...+60°C
  -40...+70°C(Devicemountedwith
min.1cmdistanceto
adjacentdevicesor
devicewithmax.2x
0.5Acontactcurrent)
Auxiliaryvoltage
AC/DC100...230V: -40...+60°C
  -40...+70°C(Devicemountedwith
min.1cmdistanceto
adjacentdevicesand
devicewithmax.2x
0.5Acontactcurrent)
Storage: -40...+70°C
Altitude:≤2000m IEC60664-1
Measuring ciruit L(+)/L(-) to PE1/PE2 (with coupling device)
Nominal voltage UN: AC/DC0...230V
Max. max. voltage range UN: AC0...250V
DC0...300V
Frequency range: DCoder40...1000Hz
Max. line capacitance: 5µF
Internal resistance (AC / DC): >90kΩ
Measuring voltage:  Ca.±90V
Max. mesured current (RE= 0):<1,10mA
Response inaccuracy:±15%±1,5kΩ IEC61557-8
Response value hysteresis: Approx.+25%;min.+1kΩ
On delay
AtCE=1µF,
responsevalue≤100kΩ,
REof∞to0.5*responsevalue: ≤1s
AtCE=1µF,
responsevalue>100kΩ,
REof∞to0.5*responsevalue: <2s
Measuring time:
AtCE=1…5µF <5s
Min. operate time: >0.2s
Response value
Adjustable via Modbus
Pre-warning"RpA": Intherangeof1...500kΩin1kΩsteps
Alarm"RA": Intherangeof1...500kΩin1kΩsteps
Response value broken
wire detection L(+)/L(-): >Approx.90kΩ
Response value broken
wire detection PE1/PE2: >Approx.0.5kΩ
Meas. ciruit L(+)/L(-) to PE1/PE2 (with coupling device RL / RP 5898)
RL 5898 RP 5898
Nominal voltage UN:AC0...400V AC0...690V
DC0...500V DC0...1000V
Max. max. voltage range UN:AC0...440V AC0...760V
DC0...550V DC0...1100V
Frequency range: DCor40...1000Hz
Max. line capacitance: 5µF
Internal resistance (AC / DC): >240kΩ
Measuring voltage:  Approx.±90V
Max. mesured current (RE= 0):<0.40mA
Response inaccuracy:±15%±1.5kΩ IEC61557-8
Response value hysteresis: Approx.+25%;min.+1kΩ
On delay
AtCE=1µF,
responsevalue≤100kΩ,
REof∞to0.5*responsevalue: ≤1s
AtCE=1µF,
responsevalue>100kΩ,
REof∞to0.5*responsevalue: <2s
Measuring time:
AtCE=1…5µF <5s
Min. operate time: >0.2s
Response value
Adjustable via Modbus
Pre-warning"RpA": Intherangeof1...500kΩin1kΩsteps
Alarm"RA": Intherangeof1...500kΩin1kΩsteps
Response value broken
wire detection L(+)/L(-): >Approx.500kΩ
Response value broken
wire detection PE1/PE2: >Approx.0.5kΩ
Max. wire length
between insulation monitor
and coupling device: <0.5m
Technical Data Technical Data

712.07.22 en / 604A
Technical Data Standard Types
RN5897.12/321 AC/DC24…60V
Articlenumber: 0069399
• Auxiliaryvoltage: AC/DC24…60V
RN5897.12/321 AC/DC100…230V
Articlenumber: 0069400
• Auxiliaryvoltage: AC/DC100…230V
• Outputs: 1changeovercontactforpre-warning
  1changeovercontactforalarm
• Settingrangepre-warning: 1kΩ…500kΩ
• Settingrangealarm: 1kΩ…500kΩ
• WithconnectionfacilityofacouplingdeviceRL5898orRP5898
• Max.linecapacitance: 5µF
• Energizedorde-energizedontrip
• Selectionoftypeofnetwork
• Width: 52.5mm
Ordering Example for variants
Clearance and creepage
distances
Ratedinsulationvoltage: 300V
Overvoltagecategory: III
Ratedimpulsvoltage/
pollutiondegree:   IEC60664-1
MeasuringcircuitL(+)/L(-)to
auxiliaryvoltageA1(+)/A2and
indicatorrelaycontactsK1,K2: 4kV/2
AuxiliaryvoltageA1(+)/A2to
indicatorrelaycontactsK1,K2: 4kV/2
IndicatorrelaycontactK1to
indicatorrelaycontactsK2: 4kV/2
BusA,Bto
measuringcircuitL(+)/L(-)and
auxiliaryvoltageA1(+)/A2and
indicatorrelaycontactsK1,K2: 6kV/2
Insulationtestvoltage
Routinetest: AC2,5kV;1s
 AC4kV;1s
EMC IEC/EN61326-2-4
Electrostaticdischarge(ESD): 8kV(air)  IEC/EN61000-4-2
HFirradiation:
80MHz…1GHz: 20V/m  IEC/EN61000-4-3
1GHz…2.7GHz: 10V/m  IEC/EN61000-4-3
Fasttransients: 2kV  IEC/EN61000-4-4
Surgevoltage
Between
wiresforpowersupply: 1kV IEC/EN61000-4-5
Betweenwireandground: 2kV IEC/EN61000-4-5
HF-wireguided: 20V  IEC/EN61000-4-6
Interferencesuppression: LimitvalueclasseB EN55011
Degree of protection
Housing: IP30    IEC/EN60529
Terminals: IP20    IEC/EN60529
Housing: ThermpolasticwithV0behaviour
 accordingtoULsubject94
Vibration resistance: Amplitude0.35mm,

Frequency10...55Hz,IEC/EN60068-2-6
 frequency2...13.2Hz,13.2...100Hz,
 acceleration±0.7gnIEC/EN60068-2-6
Shock resistance:  10gn/11ms,3pulsesIEC/EN60068-2-27
Climate resistance: 40/070/04  IEC/EN60068-1
Terminal designation: EN50005
Wire connection DIN46228-1/-2/-3/-4
Crosssection: 0.5...4mm²(AWG20-10)solidor
 0.5...4mm²(AWG20-10)
 strandedwirewithoutferrules
 0.5...2.5mm²(AWG20-10)
 strandedwirewithferrules
Strippinglength: 6.5mm
Wire fixing:  Cross-headscrew/M3boxterminals
Wire connection Bus
pluggablecage-clampterminal:0,14...0,5mm2solidor
 0,14...0,25mm2strandedferruled
Insulationofwiresor
sleevelength: 7mm
Fixing torque:  0.5Nm
Mounting: DINrail  IEC/EN60715
Mounting position: Vertical
 (airowtroughventilationslots
 mustbeensured)
Weight: Approx.205g
Dimensions

Width x height x depth: 52.2x90x71mm
RN5897.12 /___AC/DC24…60V1kΩ...500kΩ1kΩ...500kΩ

SettingrangePre-warning
 Settingrangealarm
 Auxiliaryvoltage
 Variant,ifrequired
 Contacts
 Type
Vibration and
shock resistance: Category1,ClassB IEC/EN61373
Ambient temperature: OT1,OT2compliant
Protective coating of the PCB: No
Classification to DIN EN 50155

812.07.22 en / 604A
Accessories
RL5898/61
Articlenumber:  0068315
• CouplingdeviceforRN5897.12/320
• ExtensionofnominalvoltagerangeUNtoDC500V,AC400V
• Weight: Approx.60g
• Dimensions
- Widthxheightxdepth: 35x90x71mm
RP5898/61
Articlenumber:  0066944
• CouplingdeviceforRN5897.12/320
• ExtensionofnominalvoltagerangeUNtoDC1000V,AC690V
• Weight: Approx.110g
• Dimensions
- Widthxheightxdepth: 70x90x71mm
Accessories
Flush mounting kit
Orderreference:KU4087-150/0056598
Foruniversalusewith:
·R-seriesdevicesof
 17.5to105mmwidth
· Easymounting
Insulation monitor
connection
Measuring ciruit
M12054_b
Insulation monitor
connection
Measuring ciruit
M11599_b

912.07.22 en / 604A
*1)AuxiliaryvoltageUH(A1(+)/A2)canalsobesourcedfromthemonitoredvoltagesystem.
 Thevoltagerangeoftheauxiliarysupplyhastobetakenintoaccount.
*2) ControlinputX1/X2forexternalcombinedTest-/Reset-buttonwithStopofthemeasuringfunction:
 • Control1.5s<t<10s: Testfunction
 • Control<1.5s:  Resetfunction
 • Control>10s:  Stopofmeasuringfunction
Connection Examples
L1
L2
L3
N
L(+)VSG1
X1
L(-) VSG2
X2 11PE1 12PE2 14 21 22 24
M12480_a
*2)
A1(+) A2
UH
*1)
UN
PE
B
A
Ungrounded mains
3/N AC 400V/230V 40...1000Hz
External combined
Test/Reset button
Setting of type of network
3N AC
:
RN5897/321
VSG1
VSG1
L(+)
L(+)
L(-)
L(-)
PE
X1
VSG2
VSG2
X2 11PE1 12PE2 14 21 22 24
M12483_a
*2)
A1(+) A2
UH
*1)
L1
L2
L3 UN
L1(+) L2(-)
RL5898
RP5898
B
A
External combined
Test/Reset button
Setting of type of network:
AC
External coupling device:
ON
Ungrounded mains
RL5898: 3 AC 0...440V 40...1000Hz
RP5898: 3 AC 0...760V 40...1000Hz
RN5897/321

10 12.07.22 en / 604A
Connection Examples
L1
L2
VSG1
VSG1
L1(+)
L(+)
L(+)
L(-)
L(-)
PE
X1
VSG2
VSG2
L2(-)
X2 11PE1 12PE2 14 21 22 24
M12489_a
*2)
A1(+) A2
UH
*1)
UN
RL5898
RP5898
B
A
External combined
Test/Reset button
Setting of type of network:
DC
External coupling device:
ON
Single phase mains, isolated from earth
RL5898: AC 0...440V 40...1000Hz
RP5898: AC 0...760V 40...1000Hz
RN5897/321
L(+)VSG1
X1
L(-) VSG2
X2 11PE1 12PE2 14 21 22 24
M12492_a
*2)
A1(+) A2
UH
*1)
PE
L+
L-
UN
B
A
External combined
Test/Reset button
Ungrounded DC network
DC 0...300V
Setting of type of network
DC
coupling device:
OFF
:
External
RN5897/321
VSG1
VSG1
L(+)
L(+)
L(-)
L(-)
PE
X1
VSG2
VSG2
X2 11PE1 12PE2 14 21 22 24
M12495_a
*2)
A1(+) A2
UH
*1)
L+
L-
UN
L1(+) L2(-)
RL5898
RP5898
B
A
External combined
Test/Reset button
Setting of type of network:
DC
External coupling device:
ON
Ungrounded DC network
RL5898: DC 0...550V
RP5898: DC 0...1100V
RN5897/321
*1)AuxiliaryvoltageUH(A1(+)/A2)canalsobesourcedfromthemonitoredvoltagesystem.
 Thevoltagerangeoftheauxiliarysupplyhastobetakenintoaccount.
*2) ControlinputX1/X2forexternalcombinedTest-/Reset-buttonwithStopofthemeasuringfunction:
 • Control1.5s<t<10s: Testfunction
 • Control<1.5s:  Resetfunction
 • Control>10s:  Stopofmeasuringfunction
L1
L2
L(+)VSG1
X1
L(-) VSG2
X2 11PE1 12PE2 14 21 22 24
M12486_a
*2)
A1(+) A2
UH
*1)
UN
B
A
Single phase mains, isolated from earth
AC 0...250V 40...1000Hz
External combined
Test/Reset button
Setting of type of network
AC
coupling device:
OFF
:
External
RN5897/321

11 12.07.22 en / 604A
Bus Interface
Protocol ModbusSeriellRTU
Adress 1to99
Baudrate 1200,2400,4800,9600,19200,38400,57600,115200Baud
Databit 8
Stopbit 2
Parity None
Moreinformationabouttheinterface,wiringrules,deviceidentication
andcommunicationmonitoringcanbefoundintheModbususermanual.
Function-Codes
AtRN5897/321thefollowingfunctioncodesareimplemented:
Function-
Code
Name
0x01 ReadCoils
0x03 ReadHoldingRegister
0x04 ReadInputRegister
0x05 WriteSingleCoil
0x06 WriteSingleRegister
0x10 WriteMultipleRegister
Device conguration data (parameters and setting values from register
42001,aswellasthe"factorysetting"command)aredirectlystoredinthe
EEPROMinnon-volatilememorywhenwritingviaModbus.Asthewrite
cyclesofanEEPROMarelimited,thewriteoperationwiththeseregisters
orthiscommandmustnotbecyclic.
Device configuration

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Parameter Table
Coils
Register-
Adress
Protocol-
Adress Name Value range
Initial
value Description Data type Access rights
10Reset 0x0000
0xFF00
0x0000 NoFunction
Erroracknowledgem.deviceerror(relay2)
BIT Write/read
21Devicereset 0x0000
0xFF00
0x0000 NoFunction
Devicerestart
BIT Write/read
32Reserved 0x0000
0xFF00
0x0000 - BIT -
4 3 Factorysetting 0x0000
0xFF00
0x0000 NoFunction
Factorysettingoftheparameters
BIT Write/read
5 4 Deviceselftesting 0x0000
0xFF00
0x0000 NoFunction
Selftesting
BIT Write/read
65 Faultmemory
IndicatorrelayK1+K2
0x0000
0xFF00
0x0000 NoFunction
Faultmemoryacknowledgement
IndicatorrelayK1andK2
BIT Write/read
76Reserved 0x0000
0xFF00
0x0000 - BIT -
87 AdvancedTest 0x0000
0xFF00
0x0000 NoFunction
AdvancedTest
BIT Write/read
98Measuringfunction
stopped
0x0000
0xFF00
0x0000 Continuemeasuringfunction
Interruptmeasuringfunction
BIT Write/read

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Parameter Table
InputRegisters
Register-
Adress
Protocol-
Adress Name Value range Description Data type Access rights
30001 0Devicefailure 0…12 0:Nofailure
1:BrokenwiredetectionL(+)/L(-)
2:BrokenwiredetectionPE1/PE2
3:Internalfailuredetectedintestmode
4:Reserved
9:CommunicationfaultModbus
10:ChecksumfailureEEPROM
11:Internalcommunicationfault
12:Internalerror4
UINT16 Read
30002 1Stateofdevice 0…5 0:Deviceinitialize
1:Deviceisreadyandinmeasuringmode
2:Deviceinerrormode
3:Deviceinselftesting
4:Deviceinadvancedtest
5:Measuringfunctionstopped
UINT16 Read
30003 2Deviceags 0…3 Bit0:IndicatorrelayK2energized
Bit1:IndicatorrelayK1energized
UINT16 Read
Register-
Adress
Protocol-
Adress Name Value range Description Data type Access rights
32001 2000 Insulatingresistance 0…20000,
65535
in1/10kΩUINT16 Read
32002 2001 Asymmetrical
insulatingresistance
1,2,4 Bit0:Resistanceisasymmetrical
Bit1:AsymmetricalagainstL+
Bit2:AsymmetricalagainstL-
UINT16 Read
32003 2002 Measured
mainsvoltage
0…300
without
VSG
0…1000
withVSG
inV UINT16 Read
32004 2003 Storedmin.
insulatingresistance
0…20000,
65535
in1/10kΩUINT16 Read

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Parameter Table
HoldingRegisters
Register-
Adress
Protocol-
Adress Name Value range Initial value Description Data type Access rights
40001 0Controlword1 0…65535 0Bit0=Reset
Bit1=Devicereset
Bit2=Reserved
Bit3=Factorysettings
Bit4=Deviceselftesting
Bit5=Faultmemoryacknowledgement
indicatorrelayK1andK2
Bit6=Reserved
Bit7=Advancedtest
Bit8=Measuringfunctionstopped
UINT16 Write/read
40002 1Timeoutrelease 0…1 0Bit0=Enable UINT16 Write/Read
40003 2Timeout 100…10000
0…10000
1000 TimeoutValueinms(write)
TimeoutValueinms(read)
UINT16 Write/Read
Register-
Adress
Protocol-
Adress Name Value range Initial value Description Data type Access rights
42001 2000 Brokenwiredetectin
measuringcircuit
1,2,4 1Bit0=On
Bit1=Off
Bit2=Onlyduringthedeviceselftesting
UINT16 Write/Read
42002 2001 Storinginsulation
faultmessage
indicatorrelayK1+K2
0…1 00=Off
1=On
UINT16 Write/Read
42003 2002 Switchingmodeof
outputrelays
indicatorrelayK1+K2
0…1 00=De-energizedontrip
1=Energizedontrip
UINT16 Write/Read
42004 2003 Powersupplytype 1,2,4 1Bit0=ACmains
Bit1=DCmains
Bit2=3NACmains
UINT16 Write/Read
42005 2004 Reserved - 1UINT16 Write/Read
42006 2005 Responsevalue
indicatorrelayK1
1…500 500 ResponsevalueindicatorrelayK1inkΩUINT16 Write/Read
42007 2006 Responsevalue
indicatorrelayK2
1…500 500 ResponsevalueindicatorrelayK2inkΩUINT16 Write/Read
42008 2007 Couplingdevice 1,2 1Bit0=Off
Bit1=RL5898orRP5898
UINT16 Write/Read

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Notice

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E. Dold & Söhne GmbH & Co. KG • D-78120 Furtwangen
dold-relays @dold.com•www.dold.com
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