Elenco Electronics XP-770 Manuel utilisateur

Triple-output Regulated DC

Power upply

Instruction

Manual

Model XP-770

12 4

810 79 1112

131415

16171819 2021

COMPONENT OVERVIEW

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1. Voltage and current indication for master output

2. Voltage and current indication for slave output

3. Voltage adjustment of master output

4. Current adjustment of master output

5. Voltage adjustment of slave output

6. Current adjustment of slave output

7. Constant voltage mode indicator light for master output

8. Constant current mode indicator light for master output

9. Constant voltage mode indicator light for slave output

10. Constant current mode indicator light for slave output and

double current output indicator light in parallel mode

11. Independent, series and parallel selector switch

12. Independent, series and parallel selector switch

13. Positive output terminal of master output

14. Ground connection terminal of case

15. Negative output terminal of master output

16. Positive output terminal of slave output

17. Ground connection terminal of case

18. Negative output terminal of slave output

19. Main power on/off switch

20. ixed 5V positive output terminal

21. ixed 5V negative output terminal

22. AC input voltage switch

23. AC input

24. use holder

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INTRODUCTION

Congratulations on your selection of a top quality power supply! The XP-

770 is a triple-output regulated power supply providing two variable outputs

(0-20V@ 2A) and one fixed (5V @ 3A). our LCD displays allowing the

output voltages and currents to be displayed simultaneously. The variable

outputs can work independently, in series, or in parallel modes.The highest

output voltage is the sum of twice the voltage value in series mode and

the highest output current is the sum of twice the current value when in

parallel mode.

FEATURE

our LCD displays for voltage and current

Independent voltage and current controls

Constant voltage (CV) or constant current (CC) operation

LED indication for CV and CC for variable outputs

Series and parallel mode for variable outputs

Overload and short protected.

Selectable AC input voltage, 115 or 230VAC

AFETY PRECAUTION

Certain safety precautions must be observed when this power supply is

used with external circuits that are connected to AC power lines. There is

always some danger when working with electrical equipment or circuits

that operate at hazardous voltages. You should thoroughly familiarize

yourself with the equipment before using it. High voltage may appear at

unexpected points in defective equipment.

The XP-770 is equipped with a three-wire line cord which grounds the

chassis to power line ground. Do not cut off or disable the ground plug.

The power supply secondary circuits are isolated from the 115/230V

primary circuit via the power transformer. When working with other

equipment, this may not always be the case. Always be familiar with the

equipment rating. Keep in mind that defective equipment can have

dangerous voltages in unexpected places.

OPERATING IN TRUCTION

1. Set the AC input voltage switch on the back to the correct setting and

the correct fuse (4A - 115V, 2A - 230V) installed.

2. Set the power switch to the off position.

3. Plug the power cord into the power socket on the back of the unit.

4. Plug the power cord into an AC output. Note: Make sure enough space

is left for heat dissipation.

5. Check that the voltage rating of the equipment does not exceed the

power supply’s rating.

Dual Power upply Used in Independent Mode

Set the tracking switches 11 & 12 to the OUT position.

Constant Voltage Mode

1. Turn the master and slave output current adjustment control knobs (4

& 6) clockwise to the maximum position. Adjust the voltage adjustment

control knobs (3 & 5) counter clockwise to the minimum position.

2. Turn the power switch ON. Both CV LED’s should be lit.

3. Adjust the master and slave voltage adjustment control knobs (3 & 5)

to the desired voltage.

4. Connect the positive and negative output terminals to a load or similar

component.

Constant Current Mode

1. Turn the master and slave output voltage adjustment control knobs (3

& 5) clockwise to the maximum position. Adjust the current adjustment

control knobs (4 & 6) counter clockwise to the minimum position.

2. Turn the power switch ON. Both CC LED’s should be lit.

3. Connect the positive and negative output terminals to a load or similar

component.

4. Adjust the master and slave output current adjustment control knobs (4

& 6) to give the desired current.

Current Limit Protection Mode

(DC power supply: Output voltage less than 20V, or output current less than 2A)

Turn the master and slave output current adjustment control knobs (4 &

6) counter-clockwise to the minimum position. Turn the power switch ON.

2. Adjust the master and slave voltage adjustment control knobs (3 & 5)

to give the desired output voltage and then connect the output terminals

13 with 15 and 16 with 18 respectively.

3. Adjust the master and slave output current adjustment control knobs (4

& 6) to give the desired value or current limit. Remove the connection

between 13 & 15 and 16 & 18, and connect the load.

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Dual Power upply Used in Parallel Mode

1. Set the tracking switches 11 & 12 to the IN position. The master and

slave outputs will now be in parallel mode. Adjust control 3 to the

desired output voltage and the voltage of the master and slave outputs

should change identically.

2. In Parallel Mode, the output current adjusted by the master output

current adjustment control knob (4) and the slave control (6) has no

effect. The maximum output current is the sum of the master and slave

output currents.

3. In Parallel Mode, terminals 13 & 16 and 15 & 18 should be connected

respectively with thick conductive wire to prevent damage to the unit in

the event of an overload.

CAUTION:

• In the event of a short circuit at the output, the current will limit at the

value set by the current controls. However, the unit should be turned

O and the short circuit removed before continuing use.

• The unit must be unplugged before servicing. Servicing should be

performed by a qualified repairperson with knowledge in electrical

hazards.

Dual Power upply Used in eries Mode

1. Set the tracking switch 12 to the IN position and tracking switch 11 to

the OUT position. Adjust the master and slave output current

adjustment control knobs (4 & 6) clockwise to the maximum position.

Adjust controls 3 and 5 to the desired output voltage.The voltage of the

master output should be tracked by the slave output. The highest output

voltage is the sum of the value of both master and slave outputs when

connecting the load to terminals 13 & 18.

2. In Series Mode, the current adjustment is independent. If the slave

control (6) is not at the maximum position but at a current limiting

position (CC LED lit), then the voltage of the slave output will not track

the master output.

3. In Series Mode, terminals 15 & 16 should be connected together with

a thick conductive wire to prevent damage to the unit in the event of an

overload.

4. In Series Mode, remove any connection between the master or slave

negative terminals and the ground connection terminals. Otherwise, it

is possible to short-circuit the slave output.

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PECIFICATION

Number of Outputs Three / two variable and one fixed.

Input Voltage 104 – 127VAC (60Hz) • 207 – 253VAC (50Hz)

Protection Current limit and short circuit protection.

Display Accuracy Voltage +1% +2 digits, Current +2% +2 digits

Environment: 32O- 104O(0O- +40OC), relative humidity <90%

Dimensions (WxHxD)

(10.2 x 6.5 x 14”), (25.9 x 16.5 x 35.6cm)

Weight 12.9 lbs. / 5.85 kg.

Output

Voltage

Output

Current

Line Regulation Load Regulation Ripple & Noise

CV CC CV CC CV CC

0-20V 0-2A

< 0.01% +2mV

< 0.2% +2mA

< 0.01% +3mV

< 0.2% +3mA

< 0.5mV rms

< 3mA rms

5V + 0.25V

3A < 1.5mV – < 15mV –

< 5mV rms

–

• The unit should be stored in a dry and well-ventilated place and the

power cord removed if storing for a long period of time.

• Never place any objects on the power supply.

• Do not obstruct the ventilation holes.

• Avoid contacting the heat sink of the power supply as it can become very

hot. Contacting the heat sink when it is hot could result in skin burns or

damage to the equipment in contact with them.

•

Never move or pull the power supply using the power cord or output lead.

• The XP-770 is designed for INDOOR USE ONLY.

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Elenco®Electronics, Inc.

150 Carpenter Avenue • Wheeling, IL 60090 • (847) 541-3800

Website: www.elenco.com • e-mail: elenco@elenco.com

TWO YEAR WARRANTY

All Elenco®models are guaranteed for two full years on all parts

and service. or the first 3 months, your power supply is covered at

absolutely no charge. or the remaining 21 months, a nominal

service charge is required to cover shipping and handling.

When returning merchandise for repair, please include proof

of purchase, a brief letter of explanation of problem, and

sufficient packing material. Before returning any

merchandise please call our service department at (847) 541-

3800 to obtain a return authorization number (RMA).

MAINTENANCE

Cleaning – Using a soft moistened cloth, remove any dirt on the outside of

the case. The power supply should be used in a normal working

environment.

Servicing – If the unit becomes inoperative or damage, Elenco®Electronics

or a qualified repairperson should only perform the repair and calibration.

Fuse Replacement

The power supply will not work if the fuse is blown or not installed. Check

and repair any existing problems before installing new fuse. Only use fuses

with same specification as original the one.

Warning - To prevent fire use only 250V or greater with the specified

current.

1. Disconnect the AC power before replacing the fuse.

2. Insert a small screwdriver into fuse holder slot (located between fuse

holder and receptacle) and pry fuse holder from receptacle.

3. Replace the blown fuse and insert holder into receptacle. Be sure that

the fuse is installed so that the correct line voltage is selected.

Elenco®fuse part numbers:

AC Power 230V 2A fuse 250V (5 x 20mm) Part #: 533020

AC Power 115V 4A fuse 250V (5 x 20mm) Part #: 531044

4. Plug line cord back into the AC output and test unit.

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