Logo Caen



1 Ch 12 kV/20 µA Digital Controlled Power Supply Module for MRPC


  • Single Desktop HV channel
  • 0 ÷ 12 kV output voltage
  • 20 μA maximum output current
  • Available with positive or negative polarity
  • LEMO HV output connector
  • 100 mV voltage monitor resolution
  • 100 pA current monitor resolution
  • Digital output voltage control
  • Internal memory for permanent storage of calibration and configuration
  • RS485 digital control (allows to build daisy chain network of A75xxDB modules)
  • LEMO 00 connector for preamplifier power supply
  • Interlock logic for Module enable
  • SMART HV command interface


The A7512DB Power Supply Module is a compact desktop solution to provide stable and noiseless power supply for single and multi-gap Resistive Plate Chamber (RPC) detectors.

The module houses a digital controlled high voltage channel that provides a 12 kV maximum voltage with 100 mV monitor resolution The maximum output current is 20 μA, with 100 pA monitor resolution. It is available with either positive or negative output voltage. HV output is delivered through LEMO HV connector.

The following channel parameters can be programmed

  • Output voltage: 0 ÷ 12 kV step: 200 mV
  • Current limit 0 ÷ 20 μA step: 1 nA
  • Voltage Ramp up/down: 1 ÷ 500 V/sec step: 1 V/sec
  • TRIP parameter

Power supply control can be performed remotely, via RS485, that allows to build a daisy chain network of A75xxDB modules.
A7512DB houses also bias output through LEMO 00 connector for preamplifiers power supply. Three different options are available: 2.8 V / 3.3 V / 5 V (maximum output power: 3 W).

Safety features include:

  • Overcurrent detection: if the channel attempts to draw a current larger than Iset, the output voltage is automatically adjusted to keep the current below Iset limit. Under this condition, the channel behaves as a current generator.
  • The Module can be enabled or disabled through the interlock logic.

Technical Specifications


Custom Carrier
W=63 mm ; L=170 mm ; H=36 mm

Output Connector

Lemo Connector HV FFB.3S.415.CLLC10

COMM connector

15 Pin Male HD-Sub Connector VGA 5749768-1

Operating temperature

-20° C ÷ +45° C

Storage temperature

-55° C ÷ +85° C

Voltage Supply (Vin)

+12 V ± 20%

Output Voltage (Vout)

0 ÷ +12000 V

Output polarity


Maximum Output Current (Iout)

20μA @ +- 12000 V

VSet Resolution


VMon Resolution


Current Set Resolution


Current Monitor Resolution


Aux PWS preamp

~ 2.8V Iout max 1 Amp (it is required a bulk capacitor on the preamplifier input, >470μF)

Power requirement

~ 2.5W @ 12000 V (Rload ≈ 1000 MΩ) only HV CH
~ 6W @ 12000 V + (Rload ≈ 1000 MΩ) HV CH+ Aux

Output Ripple

Typical <30mVpp; Maximum 50mVpp (10KV working)
Typical <50mVpp; Maximum 80mVpp (12KV working)

VMon vs. VOut Accuracy

typical: ± 0.3% ± 0.5 V max: ± 0.3% ± 2 V

VSet vs. VMon Accuracy

typical: ± 0.3% ± 0.5 V max: ± 0.3% ± 2 V

IMon vs. IOut Accuracy 2

2% ±200nA ±50ppm/°C with output current from 10% to 100% f.s.

Vout vs. Vset Integral Non Linearity

<±0.035% (at 25° C)

Electromagnetic compatibility

Weak emission of electromagnetic impulse and RF; one- piece metal shielding with several ground connections

Uniformity of a lot

< 0.5 %


Over current short circuit, sparks and humidity


Compare with Stand alone Units.


Ordering Options

Code Description
WA7512DBNXAA A7512DNB -12kV 20µA HV Power Supply Module - BOXED   RoHS
WA7512DBPXAA A7512DPB +12kV 20µA HV Power Supply Module - BOXED   RoHS


Great to have you back!