National Instruments PCI-DIO-96 User Manual page 28

Chapter 3 Signal Connections
This resistor value, 5.7 kΩ, provides a maximum of 2.8 V on the DIO line
at power up. You can substitute smaller resistor values to lower the voltage
drop or to provide a margin for V variations and other factors. However,
CC
smaller values draw more current, leaving less sink current for other
circuitry connected to this line. The 5.7 kΩ resistor reduces the amount of
a logic low sink current by 0.8 mA with a 0.4 V output.
© National Instruments Corporation 3-13 PCI-DIO-96/PXI-6508/PCI-6503 User Manual