Kenwood Pds-20 User manual

fhe

CTUWO

oot

PDS-20/20D

PD8S-30/30D

PD1

8-20/20D

PD1

8-30/30D

PD35-20/20D

REGULATED

DC

POWER

SUPPLY

INSTRUCTION

MANUAL

CONTENTS

GENERAL

siciasieisseisiecccesesistaccussccsanets

cence

seseeidcasnesnsevenweeseseventansuabancssenssineesenese'

3

FEATURES

i

scccivcscanecevsvncsdecsesutirscencecctcistawsscweneeviegecdebedsebassebeaastanesdevnacksewensyas

3

SPECIFICATIONS.

.........cccccccccesccccceccreccuascccsccnscssucssccenceeascensceaseenastsecereusenscccunes

4

PRECAUTION

FOR

USE..........cc.ccccsscecnceccccccneccneccceccnsnscenccecevensssaseessersasennaceeenes

7

CONTROLS

AND

INDICATORS

............ccccccececcececsensccnccscnsceasscereesenceneeneeasensnesees

8

FRONT

PANEL

....cccccceecccvescnencccencccesccccancrecnaceunnerenssseeeassnesseeesaneesuaseseesasneneaess

8

REAR

PANEL

.....ccescccesccscncccnscccsscressccssccsecccaceucceuccccecncceresscesnessenensatecssseenassaens

10

OPERATION.

......c:ccccscsscsccesaccncnscuseccsscccccccccccnccescusnscarsccanceasoesccensarsncesaseusasoucnas

12

AS

A

CONSTANT-VOLTAGE

POWER

SUPPLY

.....cccsecccesecctensseeeenereeseueeneneeeensoseenaass

12

AS

A

CONSTANT-CURRENT

POWER

SUPPLY

......:.cecececeecececesecnaecesesestseneneeensnanaeaes

12

HOW

TO

CHECK

VOLTAGE

AND

CURRENT

......cccccccceecctensceeessceeneceeensanereneuseuneaeees

13

HOW

TO

SET

OVERVOLTAGE

PROTECTION

(OVP)

LEVEL......sesecsesescesetsecescenactscsecees

13

APPLICATION

....:.:cscccsseecececscecscecscncncccsravstacsosesccsepnpenscersesussneatanavsenenseaneuseenacse

13

USE

OF

REAR-PANEL

TERMINALS.

........cccccceeccnceenaterenerennesennnerenenseenscerennasesenacaees

13

REMOTE

SENSING

......cccccccnecnsencncccucccvecceenanseencceeasasenseersnstenaneussesossunanseuscuseens

13

REMOTE

CONTROL

OF

CONSTANT

VOLTAGE

(RESISTANCE

-

VOLTAGE)

....-..+sesereeeees

14

REMOTE

CONTROL

OF

CONSTANT

CURRENT

(RESISANCE

-

VOLTAGE)

.....-.eeeeseeeeenes

16

SERIES/PARALLEL-CONNECTED

OPERATION

......csecccceesseessccenseesesaceeenneeeeseseeeenacoues

17

CONSTANT-CURRENT

CHARGING/DISCHARGING

OF

BATTERY

......escsesseeeeneneeeteneeeees

20

MAINTENANCE

AND

ADJUSTMENT.

............ccccceceeeeeeerereecencneseneeeeeenenaeeaeeneneeaes

21

MAINTENANCE

.....cccencncrsnsccscccccncccccccssaccnccssenensnnsnesuccccsensccesscsnucaasnenspescuseasace

21

ADJUSTMENT

....ccccccccccccccccsscccconccccsnsnensnsnsnnsnoneccccssccssnscosnasesseucenesuncarscusersenes

23

TROUBLESHOOTING.

.......2.2...2ccccecceccsccccnenceccreccscovcnnvancccccosseussenssscenansasensseasouace

25

DIMENSIONS.

........20ccccsccosessscnncennscntscnsesconsccuacceccnnsaenasnneessceeeensenesseuatsesesteccceces

26

*This

manual

covers

the

ten

models;

PD8-20,

PD8-20D,

PD8-30,

PD8-30D,

PD18-20,

PD18-20D,

PD18-30,

PD18-30D,

PD35-20

and

PD35-20D.

Please

read

the

descriptions

applicable

to

your

model.

GENERAL

The

PD

series

are

compact

DC

power

supplies

regulated

by

phase

control.

They

have

sufficient

reliability

and

accurate

electrical

characteristics

and

are

suitable

for

research,

ex-

periments,

aging

of

many

hours,

and

for

control,

etc.

They

are

provided

also

with

means

of

protection

and

remote

control.

They

are

designed

totally

for

the

ease

of

use.

FEATURES

The

size

is

compact

owing

to

the

built-in

phase-controlled

preregulator.

Characteristics

of

voltage

regulation

and

against

noises

in-

cluding

ripples

are

very

good.

Both

voltage

and

current

vary

little

with

temperature.

The

output

voltage

may

be

changeable

in

small

steps

with

a

potentiometer

turnable

as

many

as

ten

positions.

The

V/I

CHECK

switch

provided

permits

to

check

the

preset

values

of

voltage

and

current

even

during

operation.

The

OUTPUT

switch

turns

on

and

off

the

output.

Protection

is

complete

from

overvoltage,

overcurrent,

and

excessive

temperature

rise.

The

OVP

CHECK

funciton

pro-

vided

permits

to

preset

the

overvoltage

protection

level

and

check

the

preset

level

during

operation.

Master/slave

control

is

possible

by

series

and

parallel

con-

nections.

The

output

voltage

and

current

may

be

remote-controlled

using

an

external

resistance

or

external

signals.

Rapid

transient

characteristics

are

good.

SPECIFICATIONS

OIE

ge

aaa

ee

we

ee

Output

voltage

10-positions

Oto

18

V

Oto

36

V

Resolution

(theoretical)

45

mA

30

mA

With

input

changes

of

+

10%

Note

1)

0.005%

+1

mV

Ripples/noises

(10

Hz

to

1

MHz)

rms

Note

2)

Transient

response,

(standard

value)

Temperature

characteristic,

(standard

value)

100ppm/°C,

typical

Remote

control

resistance/voltage

approx.

O

to

10

kQ/O

to

10

V

Current

regulation

(CC)

Ripples/noises

(10

Hz

to

1

MHz)

rms

Note

2)

5

mArms

|

10mArms

|

10mArmms

|

10mArms

|

10

mArmms

Remote

control

resistance/voltage

approx.

O

to

10

kQ/O

to

10

V

a

>

Protection

Operation

Turns

off

power

switch

Temperature

detection

100°C

Overvoltage

protection

level

(standard

value)

15

to

110%

of

rated

output

voltage

Model

PD

8-20/20D

8-30/30D

18-20/20D

|

18-30/30D

|

35-20/20D

Meter

and

indications

Voltmeter

(class

2.5)

F.S

BV

8V

18

V

Ammeter

(class

2.5)

F.S

|

20a

|

30a

|

oA

|

BOA

|

OA

Current

at

digital

display

(Fix.

range)

Indication

of

constant

voltage

operation

Indication

of

constant

current

operation

Indication

of

output

|

Function

Turns

on

and

off

output

(preset

voltage

indicated

with

meter

during

off

time)

D

Output

switch

Model

PD

|

8-20/20D

|

8-30/30D

a

18-20/20D

18-30/30D

35-20/20D

Power

supply

Input

voltage

AC

100

V/120

V/200 V/220

V

10%,

216

V

—

250

V,

1

¢

selectable

internally

Power

consumption

(at

AC

100

V)

Approx.

420

W

|

Approx.

590

W

|

Approx.

620

W

Approx.

670

VA|Approx.

960

VA|

Approx.

1

kVA

jApprox.

1.4

kVA

Approx.

1

kW

pone

930

W

Dimensions

and

weight

(W)

208 208

208

Approx.

1.5

KvAl

208

Enclosure

dimensions}

(H)

147

(D)

348

457

420

(W)

——-

147

TC

147

457

208

Maximum

dimensions|

(H)

168

(D)

(including

power

input

connector

411

520

(523)

483

(486)

520

(523)

483

(486)

Instruction

manual

1 1

1

|

1

100

V,

120

V

area

Praga

Por

oan

Praserinae

eel

2

or

3-core

AC

cable

(2.5

m)

Input

power

cord

200

V,220

V,

240

V

area

3-core

AC

cable

(2

m)

3-core

AC

cable

(2.5

m)

;

100

V,

120

V

area

NONE

1 1 1 1

Connector

retainer

200

V,

220

V,

240

V

area

NONE NONE

NONE

1

Bisé

100

V,

120

V

area

10Ax2

15Ax2

15AXxX2

20

Ax2

20

Ax2

200

V,

220

V,

240

V

area

4Ax2

6AX2

8BAx2

10Ax2

Notes:

1.

Measured

via

the

sensing

terminal.

2.

Measured

with

plus

or

minus

grounded.

M@

Circuit

and

ratings

are

subject

to

change

without

notice

due

to

developments

in

technology.

6

PRECAUTION

FOR

USE

1)

CHECKING

INPUT

VOLTAGE

1)

Keep

the

permitted

range

of

input

voltage.

Single

phase,

100/120/200/220/240

V

AC,

+10%,

50/60

Hz

2)

The

adapted

input

voltage

is

indicated

at

the

AC

input

terminal

on

the

rear

panel.

3)

When

converted

the

line

voltage,

refer

to

the

section

of

MAINTENANCE.

2)

POWER

CORD

CONNECTION

Some

models

have

a

connector

retainer

on

the

AC

cord

connector

to

hold

the

cord

from

slipping

off.

For

safe

operation,

be

sure

the

retainer

is

locked.

3)

OUTPUT

CONNECTION

1)

Make

sure

that

the

rear-panel

output

terminals

and

control

terminals

are

connected

with

jumpers

as

shown

Fig.

2.

Output

terminals

of

rear

panel

§

3

—

-S

+

+5

Control

terminals

$e

oOo

OOO

Fig.

2

2)

The

output

lines

are

floating.

Connect

either

of

the

front-panel

output

terminals

to

GND

normally

with

short

bar.

4)

ENVIRONMENTAL

CONDITIONS

1)

Keep

the

operating

temperature

range

of

O°

to

40°C.

If

the

ambient

temperature

rises

excessively,

the

device’s

protection

system

works

and

cuts

off

power.

2)

Keep

clear

the

ventilation

openings

(at

sides

and

bot-

tom)

and

the

passage

of

fan

air.

Install

any

other

devices

more

than

30

cm

apart

from

those

openings.

3)

Avoid

to

install

the

power

supply

in

a

dusty

place

and

where

there

are

much

corrosive

gases.

4)

Avoid

to

install

sensitive

instruments

on

and

beside

the

power

supply.

<FRONT

PANEL

>

CONTROLS

AND

INDICATORS

PDIS-20

CUHRENT

@

©

© ®

@

POWER

switch

When

turned

on,

the

indicators

POWER

and

either

of

CC

and

CV

light.

The

power

switch

is

automatically

cut

off

when

pro-

tection

(overvoltage/overcurrnt/temperature)

has

operated.

@)

Voltmeter

Indicates

the

output

voltage

or

the

preset

voltage.

(3)

Ammeter

Indicates

the

output

current

or

the

preset

current.

@

VOLTAGE

Control

that

presets

voltage

for

constant-voltage

operation.

Turn

it

clockwise

to

raise

the

output

voltage.

©

CURRENT

7

Control

that

presets

current

for

constant-current

operation.

Turn

it

clockwise

to

increases

the

output

current.

©)

CV

indicator

Indicates

during

constant-voltage

operation.

@

CC

indicator

Indicates

during

constant-current

operation.

OUTPUT

indicator

Red

LED

indicates

when

the

output

is

on.

The

preset

voltage

is

available

at

the

output

terminals

when

this

indicator

is

on.

Q)

OUTPUT

swtich

Output

switch

(contactless)

that

turns

on

and

off

the

output

electrically.

When

the

output

is

on

(.m=),

the

OUTPUT

indicator

lights

and

the

voltage

the

voltmeter

is

reading

is

output

at

the

output

terminals

and

the

ammeter

reads

the

current.

qd)

V/I

CHECK

Voltage/current

check

switch.

As

long

as

this

switch

is

depressed,

the

voltmeter

reads

the

preset

voltage

and

the

am-

meter

the

preset

current

so

that

you

may

preset

voltage

and

current.

To

check

the

preset

voltage

and

current,

depress

this

switch

when

the

OUTPUT

switch

is

on.

(@

OVP

CHECK

Overvoltage

protection

level

check

switch.

Depress

this

switch

and

the

voltmeter

reads

the

preset

overvoltage

pro-

teciton

level

so

that

you

may

preset

the

level

with

the

OVP

ad-

juster

12.

(2

OVP

adj.

control

Semi-fixed

adjustment

control

permitting

to

preset

the

over-

voltage

protection

level.

(3

Output

terminal

(+)

Positive

output

terminal

(red).

(4.

Output

terminal

(—)

Negative

output

terminal

(white).

@

GND

Ground

terminal

connected

to

the

frame.

This

is

connected

also

to

the

output

terminal

(—)

normally.

(§

Voltmeter

zero

adjuster

Adjuster

of

the

voltmeter

zero

point.

(Not

for

D

type)

(2)

Ammeter

zero

adjsuter

Adjuster

of

the

ammeter

zero

point.

(Not

for

D

type)

<REAR

PANEL

>

MADE

IN

JAPAN

J

Fig.

4

10

Qs

Output

terminal

+

output

terminals

and

+

sensor

termianls.

Control

terminals

Terminals

for

remote

control

and

series/parallel

operation.

Q0)

Fan

Forced

air

cooled

fan.

Keep

it

apart

from

walls

more

than

30

cm.

@)

Cap

of

the

fuse

holder.

@2

AC

input

terminals

Input

terminals

of

power

supply.

Connect

the

AC

cord

provided.

3

Fuse

holder

Input

fuse

holder

of

power

supply.

@4

Hole

for

mounting

the

retainer

of

power

input

connector.

@)

Cap

for

concealing

optional-connector

mounting

hole.

11

OPERATION

AS

A

CONSTANT-VOLTAGE

POWER

SUPPLY

1)

Check

the

rated

input

voltage,

then

connect

the

power

cord.

2)

Turn

the

voltage

adjuster

knob

(VOLTAGE)

fully

counter-

clockwise.

3)

Turn

on

the

power

switch.

The

POWER

(red)

indicator

light

and

the

device

is

operated.

Make

sure

that

the

OUTPUT

switch

is

off

(the

indicator

is

out).

4)

Set

a

desired

voltage

with

the

voltage

adjuster

knob

(VOLTAGE).

No

voltage

develops

at

the

output

terminals

still.

5)

Set

a

current

limit.

Keeping

the

V/I

CHECK

switch

depressed,

set

a

desired

limit

of

output

current

with

the

current

adjuster

knob

(CUR-

RENT).

_6)

Turn

on

output.

Turn

on

the

OUTPUT

switch,

and

the

preset

voltage

is

out-

put

at

the

output

terminals

with

the

output

indicator

lit.

Notes:

(1)

If

excessive

current

flows

as

when

the

load

is

shorted,

the

device

performs

constant-current

operation

at

the

preset

limit

of

output

current

and

the

output

voltage

falls.

(2)

If

the

overvoltage

protection

level

is

set

lower

than

the

preset

level

of

output

voltage,

the

power

switch

will

be

turned

off

by

overvoltage

protection.

See

how

to

set

overvoltage

proteciton.

12

AS

A

CONSTANT-CURRENT

POWER

SUPPLY

1)

Check

the

rated

input

voltage,

then

connect

the

power

cord.

2)

Turn

the

current

adjuster

knob

(CURRENT)

fully

counter-

clockwise.

3)

Turn

on

the

power

switch.

The

POWER

(red)

indicator

lights

and

the

device

is

in

constant-current

mode.

Make

sure

that

the

OUTPUT

switch

is

off

(the

indicator

is

out).

4)

Set

a

desired

current.

Keeping

the

V/I

CHECK

switch

depressed,

set

a

desired

constant

current

with

the

current

adjuster

knob

(CUR-

RENT).

5)

Set

a

voltage.

limit.

Set

a

desired

voltage

limit

with

the

voltage

adjuster

knob

(VOLTAGE).

It

is

the

overvoltage

protection

level.

6)

Turn

on

output.

Turn

on

the

OUTPUT

switch,

and

the

output

indicator

lights

and

the

power

is

output

through

the

output

ter-

minals.

Note:

If

it

is

not

preferable

to

apply

current

suddenly

like

to

a

large

inductance

load,

turn

the

current

adjuster

knob

(CURRENT)

fully

counterclockwise

and

increase

current

gradually

after

turning

on

the

output.

APPLICATION

HOW

TO

CHECK

VOLTAGE

AND

CURRENT

1)

Voltage/Current

presetting

When

the

V/I

CHECK

switch

is

depressed,

the

constant-

voltage

is

indicated

on

the

voltmeter

and

constant

current

is

indicated

on

the

current

meter.

Hereupon,

it

is

possible

to

set

a

desired

voltage

or

current

with

the

voltage

adjuster

knob

(VOLTAGE)

or

current

adjuster

knob

(CURRENT).

2)

Voltage/Current

check

When

the

V/I

CHECK

switch

is

depressed

at

constant-

current

operation,

the

preset

current

and

the

preset

voltage

can

be

checked.

HOW

TO

SET

OVERVOLTAGE

PROTECTION

(OVP)

LEVEL

Keeping

the

OVP

CHECK

switch

depressed,

the

overvoltage

protection

level

indicated

on

the

voltmeter.

(1)

Turn

off

the

OUTPUT

switch.

(2)

Keeping

the

OVP

CHECK

switch

depressed,

screw

the

OVP

adjuster

with

a

screwdriver

and

set

an

overvoltage

protection

level.

(3)

Turn

on

the

OUTPUT

switch

with

no

load

connected

(the

indicator

lights).

Raising

the

output

voltage

gradually,

check

if

the

power

switch

turns

off

at

the

preset

over-

voltage

protection

level.

(4)

Set

the

overvoltage

protection

level

at

the

maximum

reading

of

the

output

voltmeter

if

overvoltage

protection

is

not

necessary.

USE

OF

REAR-PANEL

TERMINALS

Rear-panel

output

control

——-S

+

45S

Control

terminals

A060

505

000

Fig.

5

The

output

and

control

terminals

shown

above

are

equipped

on

the

rear

panel.

These

terminals

may

be

used

to

perform

remote

sensing,

remote

control

of

output

voltage

and

output

current,

master/slave

control

operation

with

power

supply

connected

in

series

or

parallel.

REMOTE

SENSING

When

the

device

is

connected

to

a

load,

voltage

drops

due

to

contact

resistance

at

the

output

terminals

and

resistance

of

conductors.

Remote

sensing

is

performed

to

compensate

for

the

voltage

drop.

1)

Turn

off

power.

2)

Remove

the

short

bars

@

—

GS)

andO

—

CS.

3)

Connect

@§)

and

CS)

to

the

load.

Use

a

two-core

shield

cable

for

these

sensing

lines

and

connect

the

shield

line

to

@

output.

13

4)

®

and

©

may

be

taken

out

from

the

output

terminals

on

the

panel

or

directly

connected

to

the

load

from

the

@

and

©

terminals

of

the

rear

panel.

Voltage

drop

of

up

to

1.2

V

per

way

of

the

output

line

may

be

compensated

for.

If

the

voltage

drop

is

larger

than

0.5

V,

the

maximum

-rated

voltage

drops

accordingly.

Note:

If

the

load

is

remote,

oscillation

might

happen

due

to

induc-

tance

and

capacitance

of

the

output

line.

In

such

a

case,

con-

nect

an

electrolytic

capacitor

of

some

100

pF

in

parallel

with

the

load

as

shown

above.

14

REMOTE

CONTROL

OF

CONSTANT-VOLTAGE

(Resistance,

voltage)

PRECAUTIONS

WHEN

USING

REMOTE

CONTROL

This

unit

adopts

the

floating

circuit

system.

It

has

terminals

iso-

lated

from

the

frame

and

controls

output

power

on

the

basis

of

the

positive

(4+

|

cutput

terminal.

To

control

the

cUnstant

voltage

and

constant

current

settings

us-

ing

external

voltage,

connect

the positive

(+

)

output

terminal

and

GND

terminal

on

the

front

panel

as

follows:

The

GND

and

positive

(+)

terminals

should

be

connected

with

the

short

bar

(as

shown

above)

or

open

(as

shown

below):

Short

bar

a

Note:

When

the

constant

voltage

and

current

are

to

be

controlled

us-

ing

external

voltage,

the

short

bar

or

any

load

should

not

be

connected

between

the

negative

(—)

and

GND

terminals.

Control

by

resistance

(I)

It

is

possible

to

output

voltage

which

is

proportional

to

resistance.

1)

Turn

off

power.

2)

Remove

the

short

bar

()

-@).

3)

Connect

variable

resistor

R,

(10

k

ohms)

across

(@)

and

@)

as

shown

Fig.

7.

Note:

R,

must

be

10

k

ohms.

Use

a

two-core

shield

cable

and

con-

nect

the

shield

line

to

G).

For

R,

select

one

which

will

be

af-

fected

little

by

temperature

changes,

noises.

aging

effects,

and

Pass

obb

Shane

Two-core

shield

Vmax

Ouput

voltage

Vy

+

x

Ry

10

Vo

[VI]:

Output

voltage

Vmax

[V]:

Maximum

rated

output

voltage

R,

(kQ):

External

resistance

Control

by

resistance

(I)

It

is

possible

to

output

voltage

which

is

inversely

proportional

to

resistance.

Overshoot

does

not

occur

when

switching

resistance.

1)

Turn

off

power.

2)

Remove

the

short

bar

()

-

@)

and

connect

variable

resistor

R,

across

()

and

@)

as

shown

Fig.

8.

Use

a

two-core

shield

cable

and

connect

the

shield

line

to

©).

§

3

‘@

COROT

ET

Two-core

shield

Rr

Output

voltage

V>=

—>———

X

Veet

[V]

p

ge

Mo

Reh

Viet:

Reference

voltage

(approx.

O~10

V).

Set

with

the

voltage

control

of

the

panel.

R;:

OsR,

50

Rs,

Rt:

Constants

depending

on

model.

8-20/20D

|

8-30/30D

|

18-20/20D

|

18-30/30D

|

35-20/20D

15

Note:

The

output

voltage

is

determined

with

R,

and

Vret

as

given

above.

The

output

voltage

is

O

V

if

R,

is

infinite

(open).

Set

Viet

with

the

voltage

contro!

provided

on

the

panel.

To

fix

it

or

set

it

externally,

connect

a

10

k

ohm

resistor

which

has

a

good

temperature

characteristic

across

()

and

@

according

to

‘‘Control

by

resistance

(I)'’.

The

voltage

control

of

the

panel

is

now

ineffective.

Note:

Be

sure

to

adjust

the

output

voltage

at

OUTPUT

ON

mode.

In

OUTPUT

OFF

or

V/I

CHECK

mode,

there

is

a

slight

error

in

meter

reading.

Control

by

external

voltage

It

is

possible

to

output

voltage

which

is

proportional

to

voltage.

1)

Turn

off

power.

2)

Remove

the

short

bar

@)-@

and

connect

external

voltage

V,

across

@

and

()

as

shown

Fig.

9.

Be

very

careful

about

the

polarity.

Two-core

shield

cable

16

Note:

The

external

signal

voltage

should

be

0-10

V.

The

input

im-

pedance

across

@)

and

©)

is

approximately

10

k

ohms.

Use

a

two-core

shield

cable

and

connect

the

shield

line

to

©.

Vmax

V,[V]:

Output

voltage

Vo%

xVi

V,(V]:;

External

signal

voltage

10

Vmax

{V]:

Maximum

rated

output

voltage.

(OsV,3810

V)

REMOTE

CONTROL

OF

CONSTANT

CURRENT

(Resistance,

voltage)

Refer

to

the

‘PRECAUTIONS

WHEN

USING

REMOTE

CONTROL”

under

‘REMOTE

CONTROL

OF

CONSTANT-VOLTAGE”

Control

by

resistance

Control

of

constant-current

is

possible

in

proportion

with

resistance.

1)

Turn

off

power.

2)

Remove

the

short

bar

@)-().

3)

Connect

variable

resistor

R3

(10

k

ohms)

across

(6)

and

as

shown

Fig.

10.

Two-core

shield

cable

Output

current

I)

=

+3

x

R;

[A]

I,

(A):

Output

current

Imax

[A]:

Maximum

rated

current

R;

[kQ]:

External

resistance

Note:

RV;

must

be

10

k

ohms

or

less

(R;

<

10

kQ).

Use

a

two-core

shield

cable

and

connect

the

shield

line

to

@)

.

Control

by

external

voltage

It

is

possible

to

control

constant

current

in

proportion

to

voltage.

1)

Turn

off

power.

2)

Remove

the

short

bar

(8)-@)

and

connect

external

voltage

V2

across

(@)

and

(i)

as

shown

Fig.

11.

Be

very

careful

about

the

polarity.

bb5b05b5

a

Two-core

shield

cable

Qo

@

V2

Fig.

11

lox

I,

[A]:

Output

current

o=

X

V2

TA]

Ime

[Al]:

Maximum

rated

current

V,([V]:

External

signal

voltage

(O<V,510

V)

Note:

The

external

signal

voltage

should

be

0-10

V.

The

input

im-

pedance

across

()

and

()

is

approximately

10

k

ohms.

Use

a

two-core

shield

cable

and

connect

the

shield

line

to

()

.

SERIES/PARALLEL

CONNECTED

OPERATION

With

some

units

connected

in

series

or

in

parallel,

it

is

possible

to

contro!

all

units

with

one

unit

taken

as

the

master

and

the

other

as

slaves.

Series

connection

The

output

voltage

is

the

sum

of

the

output

voltages

of

the

units.

The

output

voltage

and

current

of

each

slave

unit

are

controllable

with

the

constant-voltage

and

constant-current

controls

of

the

master

unit.

1)

Turn

off

power.

2)

Remove

the

short

bar

(8)-@

of

each

slave

unit.

3)

Connect

external

resistor

R

as

shown

Fig.

12.

4)

Ground

the

GND

terminal

either

of

the

master

unit

if

the

positive

line

is

grounded

or

of

the

last

slave

unit

if

the

negative

line

is

grounded.

(The

output

conneciton

diagram

shows

the

negative

line

grounded.)

17

Connect

of

control

terminals

babbebbdbane

x

sine

FY

oe

R2

Master

Slave

(1)

Slave

(2)

At

negative

ground

Ey

=

E,

+

E,

+

E,

*

Set

the

current

controls

of

all

slave

units

at

maximum

position.

Fig.

12

18

How

to

determine

external

resistance

R,

and

R,

:

E,

Rt

Rvs

le

x

Re]

—Rs[(kQ]

(R,

=

O

(kQ),

E,

s

af

E,

[VJ]:

Output

voltage

of

master

E,[V]:

Output

voltage

of

slave

@

when

master’s

output

voltage

is

E,

Rs,

Rr:

=

Slave

C's

constants

depending

on

model.

|

pp

8-20/20D

|

8-30/30D

|

18-20/20D

|

18-30/30D

|

35-20/20D

To

obtain

R,,

replace

E,

and

E,

with

E,

in

the

above

equation.

Now,

master

unit

controls

slave

unit

()

and

slave

unit

@

con-

trols

slave

unit

@.

Notes:

(1)

These

connection

conditions

are

not

satisfied

on

the

models

below

10

V

in

rated

output.

For

details,

contact

the

nearest

agent

or

our

distributor.

(2)

Maximum

voltage

during

series

operation

does

not

ex-

ceed

rating

of

the

withstand

voltage

to

ground.

Be

careful

about

the

power

ratings

of

R,

and

R,

and

use

ones

having

a

good

temperature

characteristic.

E

2

pees

x

R,

R;

+

Rs

For

remote

sensing

during

series

operation,

use

the

(+S)

ter-

minal

of

the

master

with

the

@

sensor

or

the

(—S)

terminal

of

the

last

slave

with

the

©

sensor

(refer

to

the

section

of

remote

sensing).

Power

rating

[W]

=

Parallel

connection

The

output

current

is

the

sum

of

the

output

currents

of

the

units.

The

output

voltage

and

current

of

each

slave

unit

are

controllable

with

the

constant-voltage

and

constant-curent

controls

of

the

master

unit.

1)

Turn

off

power.

2)

Remove

the

short

bar

(8)-(9)

of

each

slave

unit.

3)

Connect

the

master

and

slave

units

as

shown

Fig.

14.

4)

Make

connection

between

each

unit

and

load

with

a

cable

of

the

same

length.

5)

Ground

the

GND

terminal

of

the

master

unit’s

panel.

(The

output

connection

diagram

shows

the

negative

line

grounded.)

The

master

unit

performs

constant-voltage

operation

(CV)

and

the

slave

units

constant-current

operation

(CC).

For

remote

sensing

during

parallel

operation,

make

connection

from

the

@S)

and

CS)

terminals

of

the

master

(refer

to

the

section

of

remote

sensing).

With

the

rated

output

voltage

is

less

than

10

V,

this

connec-

tion

is

not

possible.

Note:

For

connection

of

the

parallel

operation

with

different

models,

consult

agent

and

our

distributor.

Connect

of

control

terminal

Master

A

ee

Wee

as

om

boob

ob

bbb

ade

»4

mob

de

bobbbb

bb

0

Fig.

13

Output

connection

l

=

I,

+

L

+

I;

*

Set

the

voltage

controls

of

all

slave

units

at

maximum

position.

Fig.

14

19

CONSTANT-CURRENT

CHARGING/

DISCHARGING

OF

BATTERY

Constant-current

charging

It

is

possible

to

charge

a

battery

or

capacitor

automatically

with

a

charging

current

or

a

final

voltage

preset.

1)

Keeping

the

V/I

CHECK

switch

depressed,

set

the

final

charging

voltage

with

the

constant-voltage

control

and

the

charging

current

with

the

constant-current

control.

2)

Close

switch

S,,

and

constant-current

charging

starts

and

continues

until

the

final

voltage

is

reached.

Output

switch

+

|

S

Power

tnt

g

supply

|

=

|

ra

Notes:

(1)

Be

sure

to

equalize

the

polarity

of

the

supply

power

and

battery.

(2)

Current

would

flow

back

into

the

power

source

if

the

sup-

ply

voltage

is

lower

than

the

battery

voltage,

the

OUTPUT

switch

is

off,

or

power

supply

is

turned

off.

In

this

case

reconnect

diode

D,

in

the

forward

direction.

20

Constant-current

discharging

Connect

load

resistor

R

as

shown

Fig.

16.

We

assume

the

bat-

tery

terminal

voltage

as

E

and

discharging

current

as

I.

i~

°

£

9

Q

a

oO

P=Fx

R[W]

Fig.

16

1)

Keeping

the

V/I

CHECK

switch

depressed,

set

the

output

voltage

at

a

few

volts

higher

than

the

battery

voltage

with

the

constant-voltage

control

and

the

discharging

current

with

the

constant-current

control.

2)

Be

sure

to

connect

a

load

resistor

of

discharging.

(Direct

connection

of

battery

or

capacitor

may

cause

damage

to

this

unit)

3)

Close

switch

S,,

and

constant-current

discharging

starts

and

continues

until

the

final

voltage

is

reached.

Notes:

(1)

Use

switch

S,

to

turn

on

and

off

discharging.

(If

the

OUT-

PUT

switch

or

power

switch

is

off,

current

flows

in

this

unit

through

the

protecting

diode

connected

in

parallel

with

the

output

terminals.)

(2)

Be

careful

about

the

power

consumption

of

the

load

resistor

of

discharging.

(3)

Connect

the

blocking

diode

to

protect

the

battery.

Kenwood PDS-20 User manual

Popular Power Supply manuals by other brands