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" Very responsive and helpful, competitive pricing. Good source! "
July 2025
PCI-8431-2 Request for Availability
PCI-8431/2, 2-Port, DB-9 Male Connector, RS-485/RS-422 Standard, Serial Interface Device
Rated 5/5 | 17 ratings
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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✔ NIST Calibration Available
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 PCI-8431/2 Serial Interface
The PCI-8431/2 (Part Number: 778980-01) is a superior interface for fast correspondence between gadgets. This instrument comes with huge DMA exchanges, diverse threads, and a huge variety of processors. This model allows the user to select somewhere in the range of 2 and 4 line handset modes. Serial lines also appear like basic COM ports to show the similarity between programs that use serial interchanges. The user can utilize two standard sorts of information exchange strategies, coordinate memory acquisition (DMA) and interrupt request (IRQ), to exchange information from serial equipment to the memory on a PC. IRQ is an exchange mode that states to signals and interferes with the processor each time information is prepared. If the user has 100 B of information at a serial port, the processor needs to exchange the 100 B to memory. As the measure of information expands, so does the measure of handling power required to exchange it. DMA is an exchange mode that conveys specifically from the serial board to the PC memory, bypassing the processor by and large. The NI PCI-8431/2 Serial Interface utilizes DMA innovation to exchange information. The user can accelerate DMA exchanges by exploiting the NI-MITE ASIC, dissipating assemble innovation, and bus mastering.
The NI PCI-8431/2 Serial Interface can perform DMA exchanges with no connection from the CPU by utilizing the NI-MITE ASIC with PCI transport acing. Thus, if the CPU is caught up with dealing with different solicitations, the Serial Interface can exchange the information from the FIFO to memory. The device has 2 ports, and is equipped with a DB-9 male connector. It has a maximum baud rate of 3 Mbps, a FIFO size of 128 bytes and a power requirement of +5 VDC at 500 mA and up to 700 mA.
The NI device weighs 92 g, and measures 4.2 x 5.6 in. in physical dimensions. It has a recommended operating temperature range of 0 to 55 °C, and a storage temperature range of –20 to 70 °C.
The PCI-8431/2 is no longer available directly from the manufacturer National Instruments, but the Serial Interface Device will remain available in perpetuity for both purchase and repair services with Apex Waves.
| Model | PCI-8431/2 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 778980-01 |
| Type | Serial Interface Device |
| Standard | RS-485/RS-422 |
| Number of Ports | 2 |
| Isolated | No |
| Maximum Baud Rate | 3000 kbits/s (3 Mbps) |
| I/O Connector Type | DB-9 Male |
| FIFO Size | 128 Bytes |
| Power Requirements | +5 VDC -- 500 mA |
| Dimensions | 4.2 in.× 5.6 in. (10.67 × 14.22 cm) |
| Weight | 0.20 lb. (92 g) |
| Software Driver | NI-Serial |
| Warranty | Three Year Warranty |
| PCI-8431/2 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Request a Quote Today for Pricing |
Associated part numbers for PCI-8431-2:
National Instruments PCI-8431/2 Frequently Asked Questions
Question: What is the power requirement for the PCI-8431/2?
Answer: The power requirement is typically 500 mA and 700 mA at maximum.
Question: How much does the PCI-8431/2 weigh?
Answer: The Serial Interface Device weighs 92g.
Question: How many volts does the device accept?
Answer: The PCI-8431/2 is a universal card that accepts 3.3 or 5 volts.
Question: What is the FIFO size of the PCI-8431/2?
Answer: The device has a FIFO size of 128 bytes.
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