Cristec Voltage Guard-70 User manual

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switchisopened.Normallyinthiscasethestatusledislidgreenandtheoutputis
switchedon.Dependingonthebatteryvoltagetheledstatuscanbedifferent.
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Withoutusingtheswitchinput,thevoltageguardwilljustfunctionasalowvoltage
protectionforyourbattery.
ExplanationstatusLED
Green: Thebatteryvoltageisok.Outputisswitchedon.
Greenblinking: Flashingfourtimesperminute,optionalpanelswitchisclosed
andtheconsumersareswitchedoff.
Orange: Thebatteryvoltageislowerthanthesetprealarm
Redblinking: Outputisswitchedoffbecauseofhighorlowvoltageoroverload.
Buzzer
Theinternalbuzzersoundsbyvariableintervalsbeforereachingtheshutoffpoint.
Theintervalbetweenthesoundswillbeshorterwitheveryrepetition.Pauses
betweenalarmpulses:600s‐300s‐150s‐75s‐38s‐19s‐9s.
Technicalspecifications
Ratedcurrent(constant): 70A
Maxcurrent(10s@20C°):  140A
Voltage:12and24VDC
Inputvoltagerange: 8‐31VDC
Consumption:   >2mA(LEDOff)
Presentation:  Plastichousingwithexternalfixings–IP51
Connection:  Onthreadedroads
Dimensions(lxhxe): 100mmx89.2mmx43mm
Weight:0,21Kg
Operatingtemperature: from‐10°Cto+60°C
Storagetemperature:  from‐20°Cto+85°C
12Vlowvoltageadjustment:9‐12VDC
12Vovervoltagethreshold: 15,5VDC
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24VLowvoltageadjustment:18‐24VDC
24Vovervoltagethreshold: 31VDC
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VoltageGuard–70
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Thebestsolutiontoprotectyourbatteryagainst:
 Deepdischarge 
Overvoltage
Overload
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Presentation
Thevoltageguardprotectsyourbatteryinordertoincreaseitsdurationlife.

Itprovidesaconstantlowvoltage,overvoltageandoverloadprotection.

Whenyoubatteryreachesthepre‐setlowvoltagethevoltageguardwill
disconnectautomaticallytheDCconsumers.
DCconsumerswillbeswitchedonagainautomaticallywhenbatteryvoltage
increasesandwhendefinedthresholdisreached.
Thesystemwilloperatethesamesaywayforover‐voltage.

LowvoltagethresholdcanbeselectedfromexternalDIPswitches.
Theover‐voltagevalueisfixed.

Thesystemcanbeusedasmanualmainswitch.Theoutputisturnedoff
whentheswitchisclosed.
Inthismodethevoltageguardwillonlyoperateasbatterylowvoltage
protector.

ThevoltageguardhasanintegratedbuzzerandLEDtomonitoritsoperating
state.
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ItiscomplaintwithallLeadbatterytypes:wet,sealed,gel,AGM,Calcium,
etc.
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Installation
Thevoltageguardhastobeinstalledonasolidsurfaceandinadryandwell
ventilatedplace.
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Neverusethevoltageguardwherethereisanydangerofexplosivegas.
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Connectionandpossibleadditionalprotectionsshallbemadeincompliancewith
localandconcernedapplicationregulations.
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Appropriateterminalshallbeusedtoavoidbadconnection.
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Fastentheboltstightlybutnotovertightenthem.
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Usewiringwiththeappropriatediameter.
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Makesurethebatteryisfusedwiththerightvalue.Thisfusecanbe70Amaximum,
limitedbythevoltageguard.
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Connectthevoltageguardaccordingthewiringdiagramasshownbelow.
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Standard:
Connectthe terminaltothegroundoftheinstallation.
Connectthe terminaltothepositivepoleofthebattery.
Connecttheterminaltotheconsumers+terminal.
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Optional:
Connectthe terminaltoaswitchtogroundtousemainswitchfunction.
Connectthe!terminaltoanexternalalarm.Thissignalswitchestogroundincase
ofalowbattery(maximumalarmload1A).
Connectthe terminalstoanexternalthreecolourLEDifdesired.
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Lowvoltagecut‐offsetting
Thelowvoltagesettingcanbeadjustedbythedipswitchesaccordingtothetable
below.ThevoltageguardispermanentlyswitchedonwhenDIPswitches1,2and3
areon.Inthiscasethelowvoltageprotectionisdisabled.Thevoltageguardworks
onlybetween8VDCand31VDC.UseDIPswitch4toenableordisabletheinternal
buzzer.
Powerup
Whenthepowerissuppliedtothevoltageguardaninternalself‐testisdone.Atthis
momentthevoltageguarddeterminesthenominalsystemvoltage.Inthissituation
thestatusLEDwillflashoncered‐greenandabeepcanbeheard.
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Atapowerupvoltagebelow16V,thevoltageguardsetsitselfto12Vsystemvoltage.
Ifthepowerupvoltageishigherthan16V,thevoltageguardsetsitselfto24Vsystem
voltage.
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Usingthevoltageguardasamainswitch
Ifapanelswitchisconnectedaccordingtothedrawing,themainswitchfunctioncan
beused.Theoutputisturnedoffwhentheswitchisclosed.ThestatusLEDisoffand
flashesfourtimesaminute.Thenormalvoltageguardfunctionisactivatedwhenthe