Digital Input >> Logic Family

NI-DAQmx C Properties

Digital Input >> Logic Family

Data Type: int32
Description: Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to device documentation for information on the logic high and logic low voltages for these logic families.

Valid values

DAQmx_Val_2point5V 14620 Compatible with 2.5 V CMOS signals.
DAQmx_Val_3point3V 14621 Compatible with LVTTL signals.
DAQmx_Val_5V 14619 Compatible with TTL and 5 V CMOS signals.


You can get/set/reset this property using:
  DAQmxGetDILogicFamily
  DAQmxSetDILogicFamily
  DAQmxResetDILogicFamily