Safe operating area

The PS48401 is a Programmable DC Power supply in a 2-slot PXI / cPCI form factor. Featuring a fully isolated output capable of providing 0-48 VDC / 2 A / 40 W. It offers a programmable current limit and the ability to measure the output voltage and current under software or trigger control.

Special functions:

  • Measure output voltage or current, software controlled.
  • Measure output voltage or current, external trigger controlled.
  • Update output voltage and current limit, external trigger controlled.
  • Sequence above functions and store measured values into on-board memory


Output noise at 17V / 2A (BW DC-1MHz)

Vertical: 2 mV / div, Horizontal: 2 ms / div

Block Diagram

Key Features

  • 0-48 VDC / 2 A / 40 W max.
  • Isolated output
  • No external power source required
  • High accuracy / low noise output voltage
  • Programmable Current Limit
  • 16 Bit Read Back of Output Voltage / Current
  • 2-slot width, PXI / cPCI Instrument
  • Programmable sequencer
  • .NET, LabVIEW and LabWindows/CVI (VXIplug&play compatible) drivers included
  • Soft Front Panel included

Technical Specifications

Output Voltage 0 to 48 V
Voltage setting resolution 0.74 mV
Voltage setting accuracy ±0.2 % of programmed value ±25 mV
Load regulation 0.1 % of programmed value + 5 mV (10 to 90 % load change)
Output current 2 A max. above 20 V lineary de-rating to 0.8 A (40 W max.)
Current limit resolution 35 µA
Current limit accuracy 0.5 % of programmed value ±10 mA
Sense line regulation area 0.5 V (sum of both sense lines)
Output ripple (typical) 1.5 mVrms, 6 mVpp (Full load, BW = DC - 1 MHz)
Voltage Read back resolution 0.74 mV
Voltage Read back accuracy ±0.1 %reading ±10 mV
Current read back resolution 35 µA
Current read back accuracy ±0.2 % reading ±5 mA
Memory Depth 16 k
Rise time 1 Volt/ms (typical at full load)
Trigger input Floating opto-coupler input (220 Ohm in series with a diode)
Trigger level 4.0 V - 12 V (approx. 10 mA - 50 mA)
Minimum trigger pulse low / high time 20 µs
Maximum sequencing frequency 10 kHz
Sequence memory depth 16384 readings
Voltage to chassis (any pin) 60 VDC (safety limit, design breakdown voltage > 250 VDC)
Insulation resistance > 100 MOhm
Backplane 5 V under voltage lockout 4.65 V
Backplane 12 V under volt. lockout 11.3 V
Operating temperature 0 °C to 50 °C