11-18-2013 04:04 PM
Hi,
I was unable to find a schematic for the digital I/O pins of my PXI6289 daq card. I want to know the pull-up/pull-down components.
Thanks,
Jeff
Solved! Go to Solution.
11-19-2013 08:06 AM
Hello Jeff,
I believe what you are looking for is on page 8 of these specifications.
Pull-down resistor............................50 kΩ typical,
20 kΩ minimum
Hope that helps!
11-19-2013 11:13 AM
Thanks,
I found that but is the output pulled low by an open collector? Is there any internal pullup resistor for outputing a "High"? Is there any input capacitance component? Do you have a graphic representation of the DIO circuitry?
Thanks,
Jeff
11-20-2013 03:39 PM - edited 11-20-2013 03:40 PM
Hello Jeff,
I do have the schematic, but that cannot be shared. From what I found, there is just the internal Pull-down the resistors. There are no capacitors, but there is always some amount of internal capacitance. What amount that may be? I do not know.
11-20-2013 03:49 PM
Hi,
Can you tell me if it is a totem-pole style output? Able to source and sink current?
Jeff
11-21-2013 05:07 AM
@Jeff-Nickel wrote:
Hi,
Can you tell me if it is a totem-pole style output? Able to source and sink current?
Jeff
Read the specs. It clearly says Sourcing and Sinking. It seems that this is standard with NI DIO.