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July 2025
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779631-01, 2 Counters/Timers, 16 Single Ended AI Channels, PXI-6251 PXI Multifunction I/O Module
Rated 4.7/5 | 17 ratings
Actual item may vary if no part number is provided on quote request.
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments 779631-01 PXI Multifunction I/O Module
The part number 779631-01 from National Instruments is the identifying part number for the PXI-6251 PXI Multifunction I/O Module. The 779631-01 features 16 analog input channels that can be configured as either 8 differential or 16 single-ended inputs. Each channel is equipped with a 16-bit analog-to-digital converter (ADC), ensuring high-resolution signal acquisition. The input ranges are programmable, offering options from ± 0.1 V to ± 10 V to accommodate various signal levels. The maximum sampling rate is 1.25 MS/s for single-channel measurements and 1 MS/s aggregate for multichannel measurements, providing flexibility and high-speed data acquisition.
The device guarantees no missing codes with differential nonlinearity (DNL) and integral nonlinearity (INL) that meet strict performance standards. It supports a small signal bandwidth of 1.7 MHz and features an input impedance greater than 10 GΩ when powered on. The module also includes overvoltage protection up to ±25 V for up to four analog input pins, ensuring safe operation under various conditions.
The 779631-01 PXI Multifunction I/O Module includes two analog output channels, each with a 16-bit digital-to-analog converter (DAC). These outputs can generate signals within ranges of ± 5 V, ± 10 V, or an external reference range set on APFI 0. The maximum update rate is 2.86 MS/s for a single channel and 2 MS/s for both channels, ensuring fast and accurate signal generation. The outputs have a settling time of 2 µs for a full-scale step to within 15 ppm (1 LSB).
The device provides 24 digital I/O lines, including 8 lines on port 0 and 16 programmable function interface (PFI) lines. These lines can be individually programmed as inputs or outputs and support static digital I/O operations. The digital I/O lines are TTL compatible and can handle input voltages up to ± 20 V on up to two pins. The 779631-01 PXI Multifunction I/O Module also features two 32-bit general-purpose counters/timers capable of performing edge counting, pulse generation, frequency measurement, and more. The counters support various input and output applications, including position measurements using quadrature encoders and pulse train generation.
| Part Number | 779631-01 |
| Model Name | PXI-6251 |
| Part Type | PXI Multifunction I/O Module |
| Analog Input Channels | 16 single-ended or 8 differential |
| Maximum Sample Rate | 1.25 MS/s (single channel), 1 MS/s (multichannel aggregate) |
| Analog Output Channels | 2 |
| Digital I/Os | 24 total (8 P0, 16 PFI) |
| Counters/Timers | 2 (32-bit) |
| Dimensions | 10.6 cm x 15.5 cm (4.2 in. x 6.1 in.) |
| Weight | 222 g (7.8 oz) |
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