®
OWNER'S MANUAL
Model:PSV-40
3-Amp SWITCHING DC POWER SUPPLY
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FEATURES
Your PYRAMID Heavy-Duty 3-Amp Switching DC Power Supply is designed to
use AC power-to-power equipment that requires 12V DC automotive power.
The power supply converts standard 120V AC household power to 13.8V DC
power and can supply up to 3 amps of continuous power.
Note: Your vehicle's electrical system provides 13.8 Volts when the
engine is running.
If you are an electronic hobbyist or technician, you will appreciate the many uses
for the power supply at your workbench or in your house.
For example, use your CB mobile transceiver as a bass station, check the
operation of auto sound systems before you install them in your vehicle, or even
power marine equipment such as pumps.
Your power supply's features include:
Regulated Output Voltage-Makes it safe to use with mobile CBs, Ham radios, CD
players, tape players or anything you would power with a vehicle's DC electrical
system.
Combo Output Connectors-act as both binding posts and banana plug terminals.
This Unit Featured With A Car Cigarette Jack For The Convenience Of Your
Multiple Choices.
Not recommended for outdoor use.
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IMPORTANT SAFETY INSTRUCTIONS
DANGER: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
CAREFULLY FOLLOW THESE INSTRUCTIONS.
WARNING: This unit should not be directly connected to a battery for charging or
for battery back-up. Battery charging and battery back-up may be undertaken
only when the battery is connected through suitable external isolating diodes and
charge limiting resistor. The isolating didode will ensure that battery does not
back power the power supply. When a battery is deeply discharged, it will initially
draw a very large charging current and force the power supply into current limit
mode for prolonged periods. This is harmful for the power supply. The charge
limiting resistor will limit the charging current to ensure the maximum charging
current is well below the current limit value of the power supply.
This manual contains important safety and operating instructions for this power
supply. Before you use the power supply, read all the instructions and cautionary
markings in this manual, on the power supply, and on the product that you will
connect to the power supply, to reduce the risk of injury:
• Do not use the power supply near water(for example, a bathtub, washbowl,
kitchen sink, laundry tub, wet basement, or swimming pooi).
• Do not place the power supply on an unstable cart, stand or table. If the power
supply falls, it could injure a person or cause serious damage to the power
supply.
• Do not overload power outlets or extension cords. An overload can result in fire
or electric shock.
• Do not use an extension cord unless absolutely necessary. Using animproper
extension cord could result in a risk of fire and electric shock. If an extension
cord must be used, make sure:
a. The pins on the extension cord's plug are of the same number, size, and
shape as those of the plug on the charger.
b. The extension cord is properly wired and in good electricai condition.
c. The extension cord's wier size is at least 18 AWG.
• Do not disassemble the charger; take it to a qualified service technician when
service or repair is required. Improper reassembly may result in a risk of
electric shock or fire.
• Do not use an attachment not recommended, this could result in a risk of
fire,electric shock, or injury to persons.
• Never push any object into the slot in the power supply. It could touch
dangerous voltage points or short out parts resulting in a fire or electrical shock.
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Caution: To reduce the risk of damage:
• Do not expose the power supply to rain or excessive moisture.
• Do not operate the power supply if it has been dropped or damaged in any way.
Take it to a qualified service technician for repair.
• Slots and openings on the back and bottom of the power supply's cabinet are
for ventilation. To ensure the power supply's reliable operation and to protect it
from overheating,be sure these openings are not blocked or covered.
• The power supply should be operated only from a standard AC outlet that
provides 120V AC/60 Hz, as indicated on the label. If you are not sure of the
type of power supplied to your home, consult your local power company.
• For added safety, the power supply's polarized plug fits only into a polarized
outlet. If your AC outlet is not designed for the polarized plug, have an
electrician install the correct outlet, or use an adapter to ground the power
supply safeiy. Do not defeat the safety purpose of the plug.
• To protect the power supply during a lightning storm or when it is left
unattended and unused for long periods of time, unplug it from the AC outlet.
This will prevent damage to the power supply from lightning and power surges.
• Do not operate the power supply with a damaged cord or plug- replace them
immediately. To reduce the risk of damage to the electric plug an cord:
a. Make sure the cord is not located where it will be stepped on, tripped over, or
otherwise subjected to damage or stress.
b. Disconnect the power supply by pulling the cord's plug rather than the cord.
• Unplug the power supply from the outlet before attempting any maintenance or
cleaning. Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning
and then wipe it dry immediately.
• If your power supply dose not operate normally, in particular if any unusual
sounds or smells come from it, unplug it immediately and contact a qualified
service technician for repair.
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CONNECTIONS
Caution : Make all other connections before you connect the power
supply standard AC power.
1. Turn off the device requiring power.
2. Set the power supply's POWER switch to OFF.
3. Turn the sleeves of the red and black binding output posts counterclockwise to
expose the wire hole.
4. Insert the device's positive wire (usually red) into the red binding post's wire
hole, then tighten the binding post's sleeve to secure the wire in place.
5. Insert the device's negative wire (usually black) into the black binding post's
wire hole, then tighting the binding post's sleeve to secure the wire in place.
6. If you are using the banana plugs connection, insert the plugs into the
terminal's jack.
Warnings: To avoid damage to both the power supply and the device:
• Follow the correct polarity when connecting the power supply and the device.
• Do not let the ends of the positive and negative wires touch each other.
Note: The binding posts' wire holes can accommodate up to 16-
gauge wire.
7. Connect the power supply's AC cord to a standard 120V AC outlet.
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OPERATION
To use the power supply after you connect the device to it, set POWER to turn it
on with the red led light illuminated.
If the power supply's POWER switch does not light, check all connections and
confirm the wall AC outlet has power.
If the outlet has power, set POWER to OFF, reduce the load (by using a device
that does not require more that 3 amps), then set POWER to ON. Your power
supply's overload protection circuit automatically shuts down the power supply
when it is overload and resets by turning POWER to OFF.
Caution: Place your power suppply in a well ventilated open and cool
area. Do not block the openings at the fan suction on the
sides and the discharge openings on the bottoms.
Cauton: To reduce the risk of energy hazard, be careful not to short
the output terminal during operation. Remove the output
connections after use.
Caution: Your power supply might cause TV or radio interference
even when it is operating properly. To determine whether
your power supply is causing the interference, turn off your
power supply. If the interference goes away, your power
supply is causing it.
Try to liminate the interference by:
• moving your power supply away from the receiver.
• connecting your power supply to an outlet that is on a different electrical circuit
from the receiver.
• contacting a qualified service technician for help.
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SPECIFICATIONS
Input Voltage.......................................................................110 to 120V AC
Input Frequency .................................................................................60 Hz
Output Voltage .............................................................13.8V DC 0.5 Volts
Output Current ......................................3 Amps DC Continuous (Maximum)
Line Regulation...................................................................Less Than 5%
Load Regulation..................................................................Less Than 5%
Overload Protection ..............................................FUSE 2A/250V(PSV-40)
Output Ripple .........................................................................150 mV RMS
Design .................................................................................Switching Type
Operating Temperature............................................32 to 86 ºF (0 to 30 ºC)
Storage Temperature.........................................-13 to 158 ºF (-25 to 70 ºC)
Input Cable ..................................................SVT18 AWG / 3C 85 ºC 6 Feet
Output Terminal ...........................................Binding Post 10 Amp/125 Volts
Power Switch ......................................................Illuminated, 10A /250 VAC
Dimensions (WHD) ............................................................135x49x130 mm
Weight......................................................................... 1.89 lbs ( 0.86 kgs)
Specifications are typical; individual units might vary. Specifications are
subject to change and improvement without notice.
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