VSP-VP-2024
Issue 7
VP-2024
-24 VOLT POWER SUPPLY
INTRODUCTION
These instructions contain the specifications and
information necessary to install, operate and maintain
the VP-2024, -24 Volt DC Power Supply, offered by
Valcom, Inc.
"WARNING: To reduce the risk of fire or
electric shock, do not expose this appliance to
rain or moisture."
"WARNING: Shock Hazard - Do Not Open."
"AVIS: Risque de Choc Electrique ne pas
Ouvrir."
SPECIFICATIONS
Description
The VP-2024 is a fully regulated -24VDC, 2 Amp,
power supply. The primary is protected by a fuse; the
2 Amp output is electronically protected. The output
is floating with respect to ground. The regulator will
maintain -24 Volts +/- 2 Volts over the rated range of
input voltages and output loads. Short circuit
protection is provided.
Application
• Valcom page control units
• Valcom one-way amplified speaker assemblies
• Any application where -24VDC filtered "talk
battery" is required
Features
• Regulated -24VDC "A" battery
• Full current limiting
• Over voltage protection
• Floating output
• Fully electronic supply
• UL listed
Capacity
• Current 2 Amps at 25 degrees C
Dimensions/Weight
• 3.30" H x 9.50" W x 6.00" D
(8.38cm H x 24.13cm W x 15.24cm D)
• 6.0 lbs. (2.72 kg)
Power Requirements
• Input voltage 105 to 120VAC, 60Hz, 90 Watts
max
Output Characteristics
• -24VDC regulated +/- 2 Volts
• "A" battery
• Ripple 10 millivolts RMS max
• (2) 1 Amp outputs
INSTALLATION
Mounting
The VP-2024 should be wall mounted within seven
feet of an AC receptacle. A cold water pipe or earth
ground should be connected to the local ground
screw terminal using 12 AWG or larger ground wire.
If a two wire adapter is used, make sure the ground
tab is bonded to the local electrical ground.
1 947274
Precautionary Designations
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To reduce the risk of electric shock,
Refer servicing to qualified service personnel.
Do not remove cover.
No user serviceable parts inside.
This symbol indicates that dangerous
voltage constituting a risk of electric
shock is present within this unit.
This symbol indicates that there are
important operating and maintenance
instructions in the literature accompanying
this unit.
Wiring
When using the VP-2024 with Valcom page
equipment, a strap should be added from the local
ground terminal to the ground output. Refer to Figure
1 for connections to a Valcom page control unit.
When installing Valcom one-way amplified horns,
connect the white and black wires of the horn to the
power supply -24V and GND terminals respectively.
When installing Valcom one-way speakers, connect
the -24V and GND terminals of the speaker to the
corresponding power supply terminals.
TROUBLESHOOTING CHART
PROBLEM
1. No Output
2. Blows Fuses
ACTION TO BE TAKEN
a. Verify AC present at receptacle.
b. Check for blown fuse.
a. Verify total equipment power consumption does not exceed 2 Amps.
b. Disconnect AC while making power connections.
TECHNICAL ASSISTANCE
When trouble is reported, verify that AC power is
being supplied to the unit.
To test the power supply, remove all output
connections and measure the output voltage with a
meter. If no voltage is measured, replace the unit.
Assistance in troubleshooting is available from the
factory. When cal ling, you should have a VOM and a
test set available and be calling from the job site. Call
(540) 563-2000 and ask for Technical Support, or call
(540) 767-1555 for Valcom 24-hour Faxback System or
visit our website at http://www.valcom.com.
Valcom equipment is not field repairable. Valcom, Inc.
maintains service facilities in Roanoke, VA. Should
repairs be necessary attach a tag to the unit clearly
stating your company name, address, phone number,
contact person and the nature of the problem. Send
the unit to:
Valcom, Inc.
Repair and Return Dept.
5614 Hollins Road
Roanoke, VA 24019-5056
2
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