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VSP-VP-4024B
Issue 6
1 947724
VP-4024B
-24 VOLT DC POWER SUPPLY
INTRODUCTION
These instructions provide the specifications,
installation and maintenance information for the
VP-4024B, -24 Volt Power Supply.
SPECIFICATIONS
The VP-4024B is a fully regulated -24 Vdc 4 amp
power supply. The primary is protected by a circuit
breaker and the two amp outputs by fuses. The
output is floating with respect to ground, and the two
outputs may be connected together for one 4 amp
output. The regulator will maintain -24 volts "2V
over the rated range of input voltages and output
loads. A greater than 4 amp load on power up will
cause the power supply to current limit and the
overload LED will light. Short circuit protection is
provided. Over voltage is provided to limit the
output voltage to approximately -28 volts should a
failure occur within the power supply.
Applications
The VP-4024B is designed to be used with -
• All Valcom page control units
• Valcom one-way amplified speaker assemblies
• Any application where -24 Vdc filtered talk
battery is required
Design Features
• Regulated -24 volts DC "A" battery
• Two 2 amp fused outputs
• Outputs may be connected for one output total 4
amps at 25 degrees C
• Input circuit breaker protected
• LED indication of output overload
• Full current limiting
• Over voltage protection
• Floating output
• Full electronic supply
Nominal Specifications
Power Requirements
Input Voltage: 105-120 Vac, 60 Hz, 150 watts max
1.75 amps
Dimensions: 7.0"H x 9.5”W x 5.5"D
(17.78cm H x 24.13cm W x 13.97cm D)
Weight: 12 lbs. (5.45 kg)
Output Characteristics: -24 Vdc regulated "2V
"A" battery
Ripple 10 millivolts RMS max.
Two 2 amp outputs
INSTALLATION
The VP-4024B is designed to be wall mounted within
7 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.
Connections
• Connections to Valcom page control units are
shown in Figure 1.
• When using the VP-4024B with Valcom page
equipment, a strap may be added from the local
ground terminal to either of the ground outputs.
• When installing Valcom one-way amplified
horns, connect the white and black wires of the
horn to the power supply -24V and ground
terminals respectively.
• When installing Valcom one-way speakers
connect the -24V and ground terminals of the
speaker to the corresponding power terminals.