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July 2025
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PXI-7831, 8 AI, 8 AO, 96 Digital Line, Multifunction Reconfigurable I/O Device
Rated 4.9/5 | 6 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 PXI-7831 Multifunction Reconfigurable I/O Device
The PXI-7831 is a Multifunction Reconfigurable I/O Device by National Instruments. This device is a member of the R Series. The PXI-7831 is an intelligent device featuring FPGA-based system controller for timing. The NI PXI-7831 can configure all digital and analog channels for specified applications. This model supports triggering and timing functions that can be programmed by the user. The PXI-7831 is specifically designed for precise operations. The module features three adjustment levels. The basic level is the fastest but least precise. The last level is very precise, but it is harder and slower. The intermediate level is an optimization between speed and precision.
The PXI-7831 Multifunction Reconfigurable I/O Device features eight analog inputs. The resolution of the input terminals is 16 bits. This device can sample data up to 200 kS/s. The conversion time of the PXI-7831 is 4 μs. The PXI-7831 supports input signals in the range of +10 volts. The input terminals of this device can bear up to +42 V without getting burned. However, the working voltage should remain less than +12 V for a smooth and safe operation of the module. The PXI-7831 features eight 16-bit analog output terminals as well. These terminals can be updated at a maximum rate of 1 MS/s. The update time is 1 μs.
The PXI-7831 Multifunction Reconfigurable I/O Device has 96 digital terminals. These terminals are programmable as inputs, outputs, counters/timers, or custom logic. The FPGA used in this device is a Virtex-II V1000. The RAM size of the FPGA is 720 kbits. The FPGA can be programmed using a LabVIEW FPGA module. The PXI-7831 also supports signal conditioning and I/O expansion. For this feature, the model can be interfaced with the NI-9151.
PXI-7831 Obsolete Status has been announced by National Instruments, but the device will still be available for purchase and repairs by Apex Waves.
| Model | PXI-7831 |
|---|---|
| Manufacturer | National Instruments |
| Series | R Series |
| Type | Multifunction Reconfigurable I/O Device |
| FPGA Type | Virtex-II V1000 |
| Analog Inputs | 8 (16 Bits, 200 kS/s) |
| Analog Outputs | 8 (16 Bits, 1 MS/s) |
| Number of Flip-flops | 10,240 |
| Number of 18 × 18 Multipliers | 40 |
| Embedded Block RAM | 720 kbits |
| Digital I/O | 96 |
| Timebase | 40, 80, 120, 160, or 200 MHz |
| I/O Connectors | 3 68-pin Female High-Density VHDCI type |
| Power Requirements | +3.3 VDC,+5 VDC -- 462 mA, 330 mA |
| Dimensions | 6.3 in. by 3.9 in. |
| Weight | 0.34 lb. |
| Software Driver | NI-RIO |
| Warranty | 2-3 Year Warranty |
| PXI-7831 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for PXI-7831:
National Instruments PXI-7831 Frequently Asked Questions
Question: Can I use the NI SHC68-NT-S Cable with my NI PXI-7831?
Answer: Yes, the NI SHC68-NT-S cable is compatible with and recommended for the NI PXI-7831.
Question: How many analog inputs and outputs does the PXI-7831 have?
Answer: The PXI-7831 has 8 analog inputs and 8 analog outputs.
Question: Can you define the functionality and timing on the PXI 7831 or is it fixed functionality?
Answer: The FPGA on the PXI 7831 allows the user to define the functionality and timing.
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