Sharp SD-AT1000W Dokumentacja Pobierz pdf (Strona 175)

Maxiva UAX

October 17, 2013

4‐11

888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.

ThePowerSupply’soutputtotheLPUisviaaribboncabletothesignalprocessorboard.Powertotheotherboards

issuppliedviathesignalprocessorboard.

Thebl

ockdiagramofthelowvoltagepowersupplysystemisshowninFigure4‐6onpage4‐11.

TheLPUmodul

atorsectionhasafilteredIEC320/C14ACinputconnector.TheLVPSDistributionboardacceptsAC

voltagesintherangeof100‐240VACat50‐60Hz.Theinputsar efusedbya4A,250Vslowblowfuse.Themaximum

powerforthemodulatorsectionoftheLPUis18

0W.

TheACinp

utforeachofthetwolowvoltagepowersuppliesis100‐240Vacat50‐60Hz.TheECM100UT32power

supplyiscapableofdelivering+5.0Vat10A,+24.0Vat2A,and‐12.0Vat0.8A.TheECM60US12powersupplyis

capableofdelivering+12.0Vat5A.

Bothpo

wersuppliesaremounteddirectlytothe LVPSDistributionboardbysnap‐topPEMstandoffs.TheLVPS

boardwillhaveprovisionsfortwo+12Vdcfans.Thefanswi llbefusedwithaPTCat1.35Aandthedcinputwillbe

filtered.

Figure 4-6 Low Voltage Power Supply Block Diagram

4.3.10 BatteryBackup971‐0035‐003G(optional)

ThebatterybackupboardinterfacesdirectlytotheLVPSboard.TheLVPSboardsupplies

amaximumof+12Vat1.3Atothebatterybackup.ThebatterybackupsuppliestheLVPS

boardwith+12Vbattat1Amaximum.TheboardismounteddirectlytotheLVPSboard

usingsnap‐topPEMstandoffs.Abl

ockdiagramofthebatterybackupmoduleisshownin

Figure4‐7.

Theba

tterybackupdaughterboardspecificationsareasfollows:

• Batterybackuppoweredoffoffour1.2volt2700mA‐hrNi‐MH(NickelMetalHydride)

batteries

• Includestricklechargertomaintainbatterycharge

• Allows30minutesofbackupat1amp(maximumbackupcurrent)

• Allows45minutesofbackupwhenpoweringmodulatorsystem

• TheBatteryBackupmaintainspowertothe10MHzand1PPSInputcircuitryontheSignal

ProcessingboardandtheFPGA,OCXOandGPScircuitryonthePFRU.Bypoweringthese

circuitstheexcitercanmaintainthe10MHzOCXOdisciplineloopwhentheexciterloses

power.TheOCXOcantakethreeminutestostab

ilizefromacoldstartandthediscipline

loopitselfcantakeanhourtoreachthemaximumprecision;havingthedisciplineloop

activeduringapoweroutageenablestheexcitertoreturntoairfasterwithgreater

frequencyaccuracy.Thebatterybackupisspecifiedtoholdthemodulatorupth

rough

fifteenminutepoweroutages.

J1, AC Input

100 to 240 VAC

50 to 60 Hz

+12 V

PS1

PS2

TP7

J1 - 31 - 34

+5 V

TP6

J1 - 21 - 28

+24 V

TP2

J1 - 39 - 40

-12 V

TP1

J1 - 35 - 36

J2-1

J2-2

J2-3

J4-1

J4-2

J4-3

Fan 1

Fan 2

+12 V

Fan Tach1, J1 - 8

Fan Tach2, J1 - 11

Grounds, J1 - 9, 10, 15-20, 29,

30, 37, 38

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 291 292

Sharp SD-AT1000W Dokumentacja Strona 175

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