PC Power Supply Crash Using PCI-6229

[generator]

Hi,

We are using a PCI-6229 to drive a PCB board functional tester.  The board is placed in a fixture with a bed of pogopins and the DAQ card excercises the board.  The board is powered with 15 volts which is switched using a digital I/O on the DAQ.

The first set of boards tested worked well in the fixture.  We now have some boards in the latest lot that cause the PC power supply to "crash" (shuts of the computer and is in some type of safemode that requires unplugging to reset).  The crash occurs when the 15 volts to the board is applied and the soft power "button" on the board is pressed via  digital I/O on the DAQ.

I suspect that one of the pins on the DAQ card is either getting driven with 15 volts or get shorted or something similar.  Would something like this cause the PC power supply to crash like this?

Thanks,

Ben

[Sandra_T]

Hello Ben,

You are using the DI/O on the PCI-6229 to driver a PCB board functional tester. What is the model of the PCB board function tester or is this something you are developing?

What are the differences between the first set of boards under test and the second batch tested in the fixture? What has changed?

From your post, it sounds like your application is powered by a 15V signal source which is controlled by a digital out signal from the PCI-6229. This turns on and off the power supply  to the test fixture. Does your PCI-6229 make analog input measurements during this time?

The crash occurs when the 15V is applied and a soft power "button" on the DUT (device under test) is pressed, is this correct?

Please clarify how the tester is operating and how the PCI-6229 card is used. I need some clarification on the setup and how the issue is produced.

Regards,
  Sandra T.

Applications Engineer | National Instruments