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main A7042


48 Channel 500 V / 500µA Common Floating Return Boards

  • 48 independently controllable High Voltage channels
  • 0 ÷ 500 V output voltage
  • 500µA maximum output current
  • Available with positive or negative polarity
  • Common floating return shared by all channels
  • Radiall 52 pin or DB37 connectors
  • 1 mV voltage monitor resolution
  • 1 nA current monitor resolution
  • Low Ripple
  • Independently programmable for each channel:
    - Output voltage (10 mV resolution)
    - Current limit (10 nA resolution)
    - Ramp up/down (1÷100 Volt/sec)
    - TRIP parameter
child1 A7042
A7042 is a single width board (5 TE wide) that houses 48 Independent high voltage channels. The A7042 is available in different versions equipped with DB37 or Radiall Multipin connector.

The A7042 channels share a Common Floating Return, which allows on-detector grounding reducing the noise level; the floating return is insulated from the crate earth up to ±50 V. The board is available with either positive or negative output polarity.

The output voltage range is 0 ÷ 500V, with 1 mV monitor resolution. The maximum output current is 500 μA with 1 nA monitor resolution.

Independently programmable for each channel:
pnt Output voltage:
pnt Current limit (Iset):
pnt V Ramp up/down:
pnt TRIP parameter
0 ÷ 500 V
0 ÷ 500 μA
1 ÷ 100 V/range
step: 10 mV
step: 10 nA
step: 1 V/sec
child2 A7042
Safety features
arrow Channels can be enabled or disabled through the Global Interlock logic.
arrow Overvoltage and Undervoltage warning when the output voltage differs from the programmed value.
arrow Hardware VMAX and IMAX: maximum output voltage and maximum current value can be fixed, via front panel potentiometer, at the same common value for all the board channels. IMAX and VMAX values can be read out via software.
arrow Overcurrent detection: when a channel attempts to exceed the programmed current limit (Iset), it signaled to be in "overcurrent" and enter in a TRIP status: the channel is switched off after a programmable TRIP time. The output current is permitted to exceed Iset value, the channel behaves like a current generator only if the IMAX current value is reached.
arrow Safety Board Interlock: this protection disables the HV generation when the HV outputs are not connected to their loads (only for Multipin Connector versions).
Universal Multichannel System - Mainframes
Modularity, Compatibility, Connectivity, Usability and Solidity are the keywords of the system design. The Mainframes have been specifically designed to power all detector technologies found in modern Physics Experiments, such as photomultipliers, wire chambers, streamers tubes, silicon detectors and others.

The systems are modular, flexible and match not only the requirements of major experiments with large number of channels but also the practical needs of test laboratories, where simple manual operations on a limited number of channels are often desired.

For more information see the Mainframes web pages: