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Issue 5 

 

947272 

 

 
 
 
 

 

VP-4124/VP-4124-E 

 

24/48 VOLT DC SWITCHING POWER SUPPLY

 

 

 
INTRODUCTION 

These instructions provide the specifications, 
installation and maintenance information for the 
VP-4124 and VP-4124-E, 24/48 Volt Power Supplies. 
 

FCC INFORMATION 

This device complies with part 15 of the FCC Rules.  
Operation is subject to the following two conditions: 

• 

This device may not cause harmful interference. 

• 

This device must accept any interference received, 
including interference that may cause undesired 
operation. 

NOTE: This equipment has been tested and 
found to comply with the limits for a Class B 
digital device, pursuant to part 15 of the FCC 
Rules.  These limits are designed to provide 
reasonable protection against harmful 
interference in a residential installation.  This 
equipment generates, uses and can radiate radio 
frequency energy and if not installed and used in 
accordance with the instructions, may cause 
harmful interference to radio communications.  
However, there is no guarantee that interference 
will not occur in a particular installation.  If this 
equipment does cause harmful interference to 
radio or television reception, which can be 
determined by turning the equipment off and on, 
the user is encouraged to try to correct the 
interference by one or more of the following 
measures: 

• 

Reorient or relocate the receiving antenna. 

• 

Increase the separation between the 
equipment and receiver. 

• 

Connect the equipment into an outlet on a 
circuit different from that to which the 
receiver is connected. 

• 

Consult the dealer or an experienced 
radio/TV technician for help. 

 

SPECIFICATIONS 

The VP-4124 and VP-4124-E are fully regulated 24VDC, 
4 Amp Power Supplies.  The primary is protected by a 3 

Amp slo-blo fuse and the 2 Amp outputs by 
auto-resetting fuses.  The outputs are floating  

 
 
 
 
 
 
 
with respect to ground.  The regulator will maintain 24 
Volts 

+/

-

 

2% 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. 
 Short circuit protection is provided.  Overvoltage is 
provided to limit the output voltage to approximately 
28 Volts should a failure occur within the power 
supply.  Outputs may be used in a series for 48V @ 
2A. 

Applications

 

The VP-4124/VP-4124-E are designed to be used with 

• 

All Valcom page control units 

• 

Valcom one-way amplified speaker assemblies 

• 

Any application where 24VDC filtered talk battery 
is required 

 

Design Features

 

• 

VP-4124:  115VAC, 60Hz input 

• 

VP-4124-E:  230VAC, 50Hz input (preset at the 
factory for the specific unit) 

• 

Hold Up Time: 350ms Power Line Ride Through 

• 

(2) LPS outputs (24VDC @ 2A each) 

• 

Can be used as a 24 Volt or 48 Volt power source 

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