did you read the specs of your USB6211?
The document is quite clear on your question…
(It's a LV-TTL device, able to handle standard TTL on inputs.)
i see the datasheet if USB-6211 DAQ. my program is give the digital input to DAQ.
can i connect external +5Volt to the Digital Input pin(PFI 0/P0.1)?
Based on the this input i perform the operation.
I connect the proximity sensor signal given to PFI Input. It like as a, when it sense Input will be high(5V), when not sense input will be low(0V).