Elenco Electronics XP-581 Instruction Manual

Variable Regulated

Power Supply

Instruction

Manual

Model XP-581

ElencoTMElectronics, Inc.

150 W. Carpenter Ave.

Wheeling, IL 60090

[phone]

www.elenco.com

e-mail: [e-mail]

REV-A 753249

XP-581

SCHEMATIC DIAGRAM

INTRODUCTION

The Model XP-581 is a solid-state DC power supply. It contains
four fully regulated power supplies. Three fixed voltage supplies
are +5VDC @ 3A, +12VDC @ 1A and –12VDC @ 1A. A variable
voltage is capable of delivering 2.5 - 20V at up to 2A.

All four supplies are precisely held to the desired output voltage by
special regulating circuits. The +5V and the variable supplies are
protected from overload by a current foldback circuit. The +12V
and –12V supplies are protected by special thermal cutoff circuits.
These circuit are designed to protect the power

supplies against

shorts or excessive current demand. The

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

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 operated 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-581 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 120V
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 voltage at unexpected places.

SPECIFICATIONS

INPUT Input Voltage 120VAC 60Hz

Current Protection 2A Fuse

OUTPUT

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.

CAUTION: When replacing the fuse, always disconnect the
power cord from the AC socket. Service repair should be done
only by qualified personnel who are knowledgeable of elecrical
hazard.

OPERATING INSTRUCTIONS

Connect the power supply as follows:

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

2. Plug the line cord into a 120V 60Hz outlet.

3. With the power supply turned off, connect the load to the desired
voltage output. The two common (black) terminals are tied together
inside the supply. All four XP-581 supplies therefore share a common
ground and may be stacked. You can use the –12V and the +12V
terminals to get 24VDC @ 1A or use the –12 and variable output
terminals to get 14.5 to 32VDC @ 1A output.

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

Output Voltage

Fixed

+5V

Fixed
+12V

Fixed

12V

Variable

2.5 - 20V

Output Current

3A 1A 1A 1A @ 20V

2A @ 15V

1.5A @ 5V
Load Regulation .1V .1V .1V .1V
Line Regulation .1V .1V .1V .1V
Ripple rms .01V .01V .01V .01V
Current Protection Foldback Thermal Thermal Foldback