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September 23, 2021

High Power 24V (27.2V) power supplies with for audio and battery backup applications.

24 volt power supply catalog
More 24 volt power supplies
1340 watt power supply for marine and commercial audio use Due to voltage-fold back current protection, these high current, high efficiency power supplies can be used in parallel with 24V lead acid batteries in order to provide extra power boost during surges, as well as battery backup capabilities.

Most 24V systems that are made to work with vehicles or in aircraft are 27.2 or 28 volts during charging. That is why the nominal voltage is 27.2. They can be adjusted down to 24V if desired.

Suggested Applications: Audio Display, Demo & Show Vehicles Marine & Recreational Vehicles; Battery maintenance & storage Retail Store Displays Industrial Applications (available in 24V output) Communications

High efficiency, switchmode power converters. These AC-DC power supplies have a nominal output voltage of 27 volts. They were originally designed to power automobile audio systems in demonstration rooms and trade shows. They have very low ripple and no audio noise. Other output voltages can be made upon request.
These AC/DC Power Converters are ideally suited for the mobile environment. These power supplies feature regulated and filtered outputs which allow for clean audio demonstrations without the slightest hint of noise.
Their low profile design allows for convenient mounting under a display vehicle or behind a display board. DLS series power supplies may be used with or without a battery. When combined with a high quality battery, DLS units can supply transient surges up to 500 amps. Can also be used in installations where use of a battery is not possible.
All models offer dual voltage output. (27VDC - 28.8VDC) with a removable jumper accessible from the outside.
Virtually Silent Operation All DLS Power Supplies utilize an advanced switching design. There is no low frequency transformer hum. Every unit is equipped with a cooling fan that is virtually silent.
The PST-DLS Power Supplies all feature thermal control circuitry that engages the fan only when internal temperatures require it (typically 75% of full load). They have small compact sizes compared to the transformer based power supplies. The switch mode technology utilized in DLS Power Supplies boasts 86% efficiency. This superior design results in cooler operating temperatures and compact size.
Up to six of these lightweight power supplies (identical models only) can be connected in parallel for even greater current capability.

Summary table high power 27 volt power supplies
Model number Continuous Amps Watts Weight UL listed? Dimensions Mounting Drawing AC Service Required Price
PST-DLS27-15 15A 405 4.5 lbs UL, cUL 9.7 x 6.7 x 3.4 inches including bracket click here for mounting drawing 108-132VAC
7.3 Amps
PST-DLS27-25 25A 675 5.0 lbs UL, cUL 9.7 x 6.7 x 3.4 inches including bracket click here for mounting drawing 108-132VAC
12.2 Amps
PST-DLS27-40 40A 1100 7.8 lbs UL, cUL 9.7 x 6.7 x 3.4 inches including bracket click here for mounting drawing 108-132VAC
19.5 Amps
PST-DLS-240-40 40 Amp 220VAC input 740 7.8 lbs UL, cUL 9.7 x 6.7 x 3.4 inches including bracket click here for mounting drawing 216-264 VAC
5.5 Amps
PWS1505-110-24 50 Amp
90-130 VAC
220VAC field configurable
1360 15 lbs No 17"x8.2"x3.5"   1782VA $1372

**The dual-voltage feature allows the voltage to change from 27 to 28.8 volts by inserting jumper into a socket on the outside of the charger.

Typical AC outlets are 1540VA, 14 amp service. To run the higher power units you will need higher power service. Please consult competent technical authorities to determine the total load on the circuit you intend to supply the power with, including other things plugged into the same line.

DLS Specifications
Parameter Value    
Output voltage 27.2 or 28.8 Adjustable between about 22 and 30 volts with screwdriver  
Output voltage tolerance ±0.7% no load  
Maximum ripple and noise 100 mV RMS    
Input voltage rage 108-132 VAC    
Input frequency 47-63Hz    
Typical efficiency >80%    
Short circuit protection Yes    
Overload protection Yes    
Line regulation <1%    
Load regulation <1% at output terminals  
Recommended output wire gauge 4 AWG    
Output terminals 4 AWG screw terminals    
Fan control Proportional-- Fan only comes on when needed  
Fan type Special ultra low audio noise fan     
Over temperature protection 80°C Turns off  
Ambient temperature 0°C to 40°C    
Storage temperature -20°C to 80°C    
Warranty 2 Years    

Drawing for the low noise power supply, 9 inch version
Click the drawing for a large view of the drawing for the 15A and 25A versions

For a drawing of the 40A version click here

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High power 24 volt power supplies, 27 volt, 28.8 volt

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