PCI 5V

[cig438]

I have a computer with standard 33MHz PCI slots. They support 5V cards only. Will the PCI-6221 work - is it a 5V or 3.3V or universal card ?
I couldn't find any info on this in the manual.

Thanks,
  ak

[Former NI Employee MS]

Hello,

You should browse the NI 622x specifications document. It indicates that power is drawn from the 3.3 bus, except for the NI-6221 (37 pins) that doesn't use 3.3V from the bus.

Regards,

[cig438]

It seems that power is drawn from 3.3, 5, & 12V. It looks like these are standard voltages supplied by the PCI bus.
Seems like the 6221 needs all 3 voltages ?
I guess my classification of PCI cards : 5V, 3.3V, or universal   - is wrong ?
How can 33MHz PCI cards be properly classified, & does each type have a different mechanical identation of the pinouts ?

ak

[Elijah_K]

cig438,

I found this great resource online regarding the PCI bus.  This site offers an explination of the various pins and shows which supply certain voltages to a PCI card in various speed PCI busses.  There is a 12V pin, from which the 6221 will draw .5A under no load conditions. 

PCI cards are classified by the number of bits they support and the voltage compatability they offer.

They can either offer 3.3, 5 or universal compatability and either 32 or 64 bit compatability.  The easiest way to determine this is from the 'keying' on the actual PCI connector.  Check out this knowledge base for more information.