Altronix LPS3AC Service manual

Overview:
LPS3AC linear power supply/charger converts a low voltage AC input to a 12VDC/24VDC output. This power supply is
specifically designed to provide the power needed by the most demanding security and access control applications.
Specifications:
Input:
• 16VACor28VAC(refer to Voltage Output/Transformer Selection Chart).
Output:
• 12VDC/24VDCselectableoutput.
• 2.5ampcontinuoussupplycurrent.
• Filteredandelectronicallyregulatedoutput.
• Thermaloverloadandshortcircuitprotection.
Battery Backup:
• Built-inchargerforsealedleadacidorgeltypebatteries.
• Maximumchargecurrent500mA.
• Automaticswitchovertostand-bybattery.
• Fusedbatteryprotection(circuitbreakeravailable).
• Includesbatteryleads.
Supervision:
• ProvidesACFailsupervision(Form“C”contacts).
Visual Indicators:
• ACinputandDCoutputLEDindicators.
Board Dimensions (W x L x H approximate):
4”x7”x2”(101.6mmx177.8mmx50.8mm).
Specifiedat25˚Cambient.
Voltage Output/Transformer Selection Table:
Output
Voltage
Switch
Position
Transformer Requirements
(Recommended Altronix Part #’s)
12VDC Closed 16VAC/56VA(T1656).
24VDC Open 24VACor28VAC/100VA
(AltronixmodelT2428100)
Note: Transformers with higher VA ratings may be used.
Installation Instructions:
TheLPS3ACshouldbeinstalledinaccordancewithTheNationalElectricalCodeandallapplicableLocalRegulations.
1. MountLPS3ACinthedesiredlocation/enclosure.
2. Set DC output voltage using switch SW2 (Fig. 1) (refer to Voltage Output/Transformer Selection Chart).
3. ConnectpropertransformertotheterminalsmarkedAC(refer to Voltage Output/Transformer Selection Chart).
4. Measureoutputvoltagebeforeconnectingdevices.Thishelpsavoidingpotentialdamage.
5. Connectdevicestobepoweredtotheterminalsmarked[----DC+].
6. Whentheuseofstand-bybatteriesisdesired,theymustbeleadacidorgeltype.
 Connectbatterytotheterminalsmarked[+BAT---]ontheunit(batteryleadsincluded).
 Usetwo(2)12VDCbatteriesconnectedinseriesfor24VDCoperation.
7. Whenbatteriesarenotused,alossofACwillresultinthelossofoutputvoltage.
8. Connectsupervisorytroublereportingdevicestotheoutputsmarked[ACFail].
LPS3AC - Linear Power Supply/Charger
OPEN SWITCH
CLOSED SWITCH
Switch Detail
AC DC
AC
AC FAIL
CONTACTS
AC -- DC + -- BAT +
NC C NO
SW1
12V-CLOSED
24V-OPEN
SW2
12V-CLOSED
24V-OPEN
Fig. 1

LED Diagnostics:
Red (DC) Green (AC) Power Supply Status
ON ON Normal operating condition.
ON OFF LossofAC.Stand-bybatterysupplyingpower.
OFF ON No DC output. Short circuit or thermal overload condition or defective unit.
OFF OFF No DC output. Loss of AC. Discharged or no battery present.
Terminal Identification:
Terminal Legend Function/Description
AC/AC Low voltage AC input (refer to Voltage Output/Transformer Selection Chart).
For12VDCoutputuse16VACwith56VApowerratingorhigher.
For24VDCoutputuse28VACwith85VApowerratingorhigher.
---DC+ 12VDC-24VDC@2.5ampcontinuousoutput.
---BAT+ Stand-bybatteryconnections.Maximumchargerate500mA.
ACFAIL
N.C.,C,N.O.
UsedtoreportlossofAC(e.g.connecttoaudibledeviceoralarmpanel).Relaynormally
energizedwhenACpowerispresent.Contactrating1amp@120VAC/28VDC.
Altronixisnotresponsibleforanytypographicalerrors.Productspecificationsaresubjecttochangewithoutnotice.
14058thStreet,Brooklyn,NewYork11220USA,718-567-8181,fax:718-567-9056
website:www.altronix.com,e-mail:[email protected],LifetimeWarranty,MadeinU.S.A.
IILPS3AC-Rev.112204 D24M MEMBER
AC DC
AC
AC FAIL
CONTACTS
AC -- DC + -- BAT +
NC C NO
SW1
12V-CLOSED
24V-OPEN
SW2
12V-CLOSED
24V-OPEN