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3.ExternalVoltageControl

Note:Referencevoltageterminal,PSandPVareconnectedwhenshipping

4.CurrentSharing

(1)Paralleloperationisavailablebyconnectingtheunitsshownasbelow

(+S,-SandLSareconnectedmutuallyinparallel):

(2)Thevoltagedifferenceamongeachoutputshouldbeminimizedthatlessthan 2%isrequired

(3)Thetotaloutputcurrentmustnotexceedthevaluedeterminedbythefollowingequation

(4)Inparalleloperation3unitsisthemaximum,pleaseconsultthemanufacturerforother

applications

(5)Whenremotesensingisusedinparalleloperation,thesensingwiremustbeconnectedonly

tothemasterunit

(Outputcurrentatparalleloperation)=(Theratedcurrentperunit)x(Numberofunit)x0.9

2.AlarmSignalOutput

(1)Alarmsignalissentoutthrough"P OK"&"P OKGND"pins

(2)Anexternalvoltagesourceisrequiredforthisfunction. Themaximumappliedvoltage

is50Vandthemaximumsinkcurrentis10mA

(3)Table2.1explainsthealarmfunctionbuilt-inthepowersupply

Fig.2.2InternalcircuitofP OK(Opencollectormethod)

ExternalvoltageandR

(Themax.sinkis10mA and50V)

P OKGND

P OK

Function

P OK

Thesignalis"Low"whenthepowersupplyis

15%oftheratedoutputvoltage-PowerOK

above

Low

(0.5Vmaxat10mA)

Description

Outputofalarm(P OK)

Thesignalturnstobe"High"whenthepowersupply

isunder15%oftheratedoutputvoltage-PowerFail

Highoropen

(Externalappliedvoltage

10mA max.)

R

V

0.1uF

100K

+S

Load

V-

V+

-S

LS

LS

-S

+S

CN1

CN2

No.1(Master)

AC/L AC/N

No.2(Slave)

AC/L AC/N

LS

V-

+S

-S

LS

-S

+S

CN1

CN2

V+

AC/L AC/N

LS

V-

+S

-S

LS

-S

+S

CN1

CN2

V+

No.3(Slave)

+V

-V

+S

-S

Table2.1Explanationofalarmfunction

1

2

3

4

5

6

V

Vout

100

120

40

60

80

20

EXTERNAL VOLTAGE(DC)

Non-Linear

OVP 120%(Typ.)

40

60

80

100

120

V

100

40

60

80

20

OUTPUTVOLTAGE(%)

20

+S

+V

+V

-V

LOAD

-V

-S

PV

1~6V

-S

PS

Note:Inparallelconnection,maybeonlyoneunit(master)operateifthetotaloutputloadis

lessthan5%ofratedloadcondition.

TheotherPSUs(slaves)maygointostandbymodeandtheiroutputLEDswillnotturnon.

1500WSingleOutputPowerSupply