usb 6009 digital input

[iturriamiren]

Dear All!!

With the following vi. I'm trying to receive a 5V signal in a digital input, using a usb-6009 device.

I would like to use the 5 VCC supply, available in pin 31 of the same device and send it to pin 17, representing line0 of port0. During execution, 'm physically connecting and disconnecting  these pins in order to see the difference in a led indicator. Unfortunatelly, the led is always on, even if both pins are disconnected.

Could somebody help me? I would be very pleased.

Thank you very much in advance,

Miren

[GerdW]

Hi Miren,

"the led is always on, even if both pins are disconnected"

RTFM?!

They use open collector inputs with an internal pullup resistor of 4.7k, so you actively have to pull down the input to GND to see a difference...