NI cDAQ-9178 - Specifications and Characteristics; Analog Input; Analog Output

© National Instruments Corporation 67 NI cDAQ-9178/9174 User Guide and Specifications
Specifications
These specifications are for the NI cDAQ-9178/9174 chassis only. These specifications are typical at
25 °C unless otherwise noted. For the C Series I/O module specifications, refer to the documentation for
the C Series I/O modules you are using.
Analog Input
Input FIFO size ......................................................127 samples per slot
Sample rate
1
Maximum.......................................................6.4 MS/s, system dependent
(multi-channel, aggregate)
Minimum .......................................................0 S/s
Timing accuracy
2
...................................................50 ppm of sample rate
Timing resolution
2
.................................................12.5 ns
Number of channels supported ..............................Determined by the C Series I/O modules
Analog Output
Numbers of channels supported
In hardware-timed task
using onboard regeneration............................16
In hardware-timed task
not using onboard regeneration......................Determined by the C Series I/O modules
In non-hardware-timed task ...........................Determined by the C Series I/O modules
Maximum update rate
Regeneration ..................................................1.6 MS/s (multi-channel, aggregate)
Non-regeneration ...........................................Determined by the C Series I/O modules
Timing accuracy.....................................................50 ppm of sample rate
Timing resolution...................................................12.5 ns
Output FIFO size
Onboard regeneration.....................................8,191 samples shared among channels used
Non-regeneration ...........................................127 samples per slot
AO waveform modes .............................................Non-periodic waveform, periodic waveform
regeneration mode from onboard memory,
periodic waveform regeneration from host buffer
including dynamic update
Digital Waveform Characteristics
Waveform acquisition (DI) FIFO...........................127 samples per slot
Waveform generation (DO) FIFO
NI cDAQ-9178/9174
Slots 1–4 ................................................2,047 samples
NI cDAQ-9178 only
Slots 5–8 ................................................1,023 samples
1
Performance dependent on type of installed C Series I/O modules and number of channels in the task.
2
Does not include group delay. Refer to C Series I/O module documentation for more information.