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Now available: Analog interface SM15K

Image_Analog isolated interface SM3300 and SM15K



The SM15K series can now be controlled by the isolated analog programming interface (INT

MOD ANA). This module – originally designed for the SM3300 series – also works in the

SM15K. All that is needed is the latest SM15K firmware update. That's it! Firmware updates

are available free at our website!


More slots

There is one difference compared to the SM3300-series: INT MOD ANA can be plugged into

any available slot of the SM15K. No limitations any longer.



More exciting SM15K developments will be released soon! Be first to know when by

subscribing to our newsletter.



Downloads Analog interface SM15K:


Data sheet











New! Master/Slave Interface SM15K



Delta introduces a new exciting interface for the SM15K-series: The Master/Slave interface!IMA_Master/Slave Interface SM15K-series

The master/slave control enables programming as if it's just one big power supply system;

no need to program each supply individually.


The Master/Slave interface connects SM15K power supplies and can therefore obtain a total

output current or voltage greater than a single power supply. This interface can connect up

to 20 units in parallel operation and reach up to 300 kW! It can do this while keeping the

specifications almost equivalent to using one power supply: for instance a recovery time

of only 250 uSec!


More exciting SM15K developments will be released soon! Be first to know when by subscribing

to our newsletter.



Downloads Master/Slave Interface:


Data sheet




Application note








Firmware update SM15K 

Version SM15000_H0_P0107Logo_Firmware Update



Delta Elektronika offers firmware updates free of charge for all users of Delta Power Supplies.

This is part of our excellent service!

Now available is the latest firmware update for the SM15K-series: version SM15000_H0_P0107.





Firmware update SM15000_H0_P0107


Release Note firmware update











Watch video



More Delta Power


With the new SM500-CP-90 and SM1500-CP-30 we have extended our offering to a higher

power level: from 6kW maximum per supply to 15kW.

Increased power without compromising either specifications or lifespan is what the

SM15K-units offer. A breakthrough in power electronics technology has enabled us to

engineer features that customers demanded but were previously impossible while maintaining

very competitive prices.

Several new features are introduced in the SM15K-series compared to our current power

supply series. One is already implied in the unit name: CP is short for Constant Power! The

constant power characteristic is not new, but along with a bi-directional power flow it is! Here

are the most striking features.



Flex output for better value


The constant output power covers the output range of five separate power supplies with a

traditional rectangular VI-curve. For example:



  500 Volts @ +30 Amps             500 Volts @ -30 AmpsIcon_Flex Output: Constant Power
  375 Volts @ +40 Amps             375 Volts @ -40 Amps
  300 Volts @ +50 Amps             300 Volts @ -50 Amps

  250 Volts @ +60 Amps             250 Volts @ -60 Amps

  167 Volts @ +90 Amps             167 Volts @ -90 Amps



1500 Volts @ +10 Amps            1500 Volts @ -10 Amps

1000 Volts @ +15 Amps            1000 Volts @ -15 Amps

  750 Volts @ +20 Amps              750 Volts @ -20 Amps

  600 Volts @ +25 Amps              600 Volts @ -25 Amps

  500 Volts @ +30 Amps              500 Volts @ -30 Amps


Choosing the best output range is much easier now and offers users far better value for money.



Bi-directional power flow

Icon_Bi-directional Power Flow


Bi-directional power means the same constant power characteristic in the second quadrant for

the full 15kW. It operates like an electronic load too: previously Delta’s power supplies would

be equipped with an optional power sink capable of absorbing up to 10% of the total energy

which was dissipated via internal heat sinks. Now, the power sink is standard and can sink up

to 100% of the power without the need for dissipating lots of energy.



Power Recovery [Regeneration] Technology


With the new Power Recovery [Regeneration] Technology Delta returns full power back into the

grid and the efficiency of 95% avoids the need for expensive water cooling. Compared to

traditional electronic loads – where dissipation is 100% – there is a power loss of just 5%.

Rooms will be cooler, costs for air conditioning systems will drop significantly and overall, the

SM500-CP-90 contributes to a smaller carbon footprint.



Extremely good dynamic response to load changes


Fast response to load changes has been a challenge for a long time, especially when it comes

to changing from positive to negative current and vice versa. Previously, for applications

requiring source and sink devices, several solutions were offered such as pre-loads. The full

integration of source and sink in one device is a neater and more efficient solution. The output

voltage of a SM500-CP-90 recovers in 200µs after a load change from +90 to -90A and -90 to




Inclusive functionality


Besides the constant power output and the bi-directional power flow a lot of other features are

included in the standard versions of the SM15K-series. For instance:


    • Ethernet interface
    • Built-in sequencer
    • Digital control to adapt regulation to match load type
    • Fine tune settings

There are no additional charges for these features.



Optional interfaces


The standard interface for the SM15K-units is the Ethernet interface (16 bit) with built in

sequencer. For digital I/O, serial programming, isolated contacts and master /slave operation

optional plug and play interfaces are yet available. Two other interface modules are under



    • Digital I/O interface
    • Interface with isolated contacts
    • Serial interface with multi protocols: RS232, RS485, RS422, USB (device)
    • Master/Slave interface series & parallel operation (up to 300 kW)
    • Isolated analog programming interface
    • Interface with simulation software (under development)



Data sheet


Download the data sheet (preliminary version) of the SM15K-series by clicking on the link



Data sheet



More SM15K news


To be honest: we are proud of our new bi-directional DC power supply unit! Coming soon are

another two exciting 15kW units.


    • SM70-CP-450
    • SM210-CP-150


Be first to know when these are announced by subscribing to our newsletter








SM3000 is retired



Delta Elektronika has discontinued the production of the SM3000-series. We have

produced these power supply models since 1991. Now it's time to retire. 


Defect units will be repaired for a period of 10 year after production stop. Of course against

cost price because Delta power supplies ought not to breakdown. For this reason we don't

want to make profit on repairs. Spare parts will be available for 10 years as well.


The SM3000-series have been replaced by the SM3300-series. See below overview.


SM3000 unit       SM3300 unit
    • SM15-200D
       replaced by:        
    • SM18-220
    • SM30-100D
  replaced by:  
    • SM66-AR-110
    • SM45-70D
  replaced by:  
    • SM100-AR-75
    • SM70-45D
  replaced by:   
    • SM100-AR-75
    • SM120-25D
  replaced by:   
    • SM330-AR-22
    • SM300-10D
  replaced by:   
    • SM660-AR-11




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E: by filling out the contact form


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