PSU Board
Programmable power supply

  • PSU board: Programmable power supply main view
  • PSU board: Programmable power supply view 2
  • PSU board: Programmable power supply view 3
  • PSU board: Programmable power supply view 4
  • PSU board: Programmable power supply view 5
  • Potential-free output voltage ± 25 V

  • Current limit 0.01 to 2.5 A

  • Integrated measurement of voltage and current

  • AC mode 10 to 100 Hz

  • Suitable for use as an electronic load


The PSU board features a four-quadrant amplifier and can generate voltages in the range of ± 25 V. The integrated A/D converters can be used to measure the output current and voltage. As the output is potential-free, two boards can be connected in series without any issues in order to double the output voltage to ± 50 V. Sense inputs are provided to compensate for the voltage drop in the connecting cables to ensure a precise power supply for the assemblies under test.


  • Power supply for PCBS or devices under test
  • Testing reserve polarity protection switches with negative voltages
  • Use as a constant current source
  • Loading outputs with a programmable current (electronic load)
  • Generating a single-phase supply voltage with variable amplitude and frequency up to 200 W with the use of a transformer (AC source)
  • Generating a three-phase supply voltage with 3 synchronised PSU boards with variable phase angles


Current limit0.01 – 2.5 A, 16-bit resolution, accuracy ≤ 0.1 % MBE
Measurement (only in DC mode)Voltages and current, 16-bit resolution, accuracy ≤ 0.1 % MBE
AC voltage0 – 50 Vpp (17.0 Vrms), 10 Hz to 100 Hz sine, increment 0.1 V
Connector X14-pin header RM 5 mm
Connector X264-pin multipole connector DIN 41612
Operating voltage5 V ± 0.1 V, 300 mA and 2 x 20 V AC for the amplifier
DimensionsPCB 100 x 160 mm, height 51 mm incl. heat sink
Weight0.78 kg
InterfaceRS-422 Guardian protocol


Product types

PSU3Programmable power supply (3rd generation)


Sync adapterExtension for the synchronisation of multiple PSU boards


We gladly customise our Guardian boards to fulfil your individual needs. Amongst other things, we offer the following services:

We are looking forward to your contact enquiry!