Elenco Quad 020V User Manual

Four Linear

Regulated Supplies

Instruction

Manual

Model XP-581A

Elenco®Electronics, Inc.

150 Carpenter Ave. • Wheeling, IL 60090

[phone] • www.elenco.com • e-mail: [e-mail]

REV-C 753249

XP-581A

SCHEMATIC DIAGRAM

WARRANTY POLICY

Your power supply has been tested and conforms to our rigid requirements on
performance and durability. It is guaranteed to be free of original factory defects for
a period of two years from the date of purchase. For the first three months, you get
full coverage at absolutely no charge. For the remaining 21 months, a nominal
service charge is required to cover mailing and handing.

INTRODUCTION

The Model XP-581A is a solid-state DC power supply. It contains four fully
regulated power supplies. Three fixed voltage supplies are +5VDC @ 3A,
+12VDC @ 1A, –12VDC @ 1A. A variable voltage power supply is capable of
delivering 0-20VDC at up to 2A.

All four supplies are precisely held to the desired output voltage by special
regulating circuits with thermal shutdown, current limiting and short circuit
protected.

The XP-581A is ideal for use in school, laboratories, service shops or anywhere
a precise DC voltage is required.

FEATURES

• Two analog meters for voltage and current (variable output)

• Operation –12V and +12V power supplies in series to get 24VDC @ 1A output

•

Operation –12V and variable power supplies in series to get 12-32VDC @ 1A output

• Operation with bulb load (12V up to 25W)

• Selectable AC input voltage, 115 or 230VAC

SAFETY PRECAUTIONS

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
working on it. High voltage may appear at unexpected points in defective equipment.

The XP-581A 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 at unexpected places.

FUSE REPLACEMENT

The power supply will not work if is 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 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 115V 2A fuse 250V (5x20mm) Part # 533020
AC Power 230V 1A fuse 250V (5x20mm) Part # 533010

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

CAUTION:

Service repair should be performed only by qualified personnel
who are knowledgeable of electrical hazards. The unit must be unplugged
before servicing. 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 with power cord or output lead.

The XP-581A is designed for INDOOR USE ONLY.

OPERATING INSTRUCTIONS

Precaution

Before connecting the power cord to an AC outlet, check that the AC input voltage
switch is in the correct position.

CAUTION: The unit may not operate properly or may be damaged if it is
connected to the wrong AC voltage line. If the input voltage is changed, the fuse
must also change. (Fuse 2A 250V for 115VAC, 1A 250V for 230VAC)

Connect the power supply as follows:

1. Check the voltage rating of the equipment to the powered. Care must be taken
not to exceed this rating.

2. Disconnect any load and turn OFF power switch.

3. Plug the line cord into an AC outlet.

4. Connect the load to the desired voltage output. The two common (black)
terminals are tied together inside the power supply. All four outputs therefore
share a common ground and may be stacked. You can use the –12V and +12V
terminals to get 24VDC @ 1A or use the –12V and variable output terminals to
get 12 to 32VDC @ 1A.

5.

Turn the power supply ON and adjust the variable voltage if necessary. The knob
on the front panel controls both of these functions. The variable output voltage
and current may be read with the voltmeter and ammeter on the front panel.

SPECIFICATIONS

Number of Outputs Four (one variable and three fixed)
Range 0-20VDC 2A 5V +

0.25V @ 3A

12V +

0.6V @ 1A –12V +0.6V @ 1A

Load Regulation Less than 100mV for each output

SPECIFICATIONS (continued)

Line Regulation Less than 100mV for each output
Ripple Less than 10mV rms for each output
Input Voltage 115/230VAC +

10% 50/60Hz

Protection Thermal, current limit, short circuit for each

output; fuse for primary AC voltage.

Operating Environment 32

O

F to 104OF (0OC to 40OC) 90% R.H.

Dimensions (W x H x D) 10.2” (25.9cm) x 3.7” (9.4cm) x 10” (25.4cm)
Weight 8.11 lbs. (3.7kg.)