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NI PXI-8431/2 (RS485/422)

High-Performance, 2-Port RS485/422 Serial Interface for PXI

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  • Compatible with Windows and LabVIEW Real-Time OSs
  • High-speed DMA interface minimizes CPU overhead
  • Flexible standard and nonstandard baud rates from 57 baud to 3,000,000 baud
  • 128 B transmit and receive FIFOs
  • Memory mapped to prevent I/O resource conflicts
  • Selectable 4- and 2-wire transceiver modes for full- and half-duplex communication
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The NI PXI-8431/2 is a high-performance, 2-port serial interface module for high-speed communication with RS485 and RS422 devices at rates of up to 3,000 kbit/s. High-performance RS485 interfaces are available with up to eight ports. The PXI-8431/2 offers flexible baud rates for data transmissions between 57 baud and 3,000,000 baud to within 1 percent accuracy for nonstandard baud rates and 0.01 percent accuracy for standard baud rates.

With the high-performance DMA engine, you achieve high throughput with minimal CPU usage. Using memory mapping, you can connect to more communication points without resource conflicts. National Instruments also offers easy-to-use powerful software that significantly reduces your development time for systems using serial communication with the PXI-8431/2.

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Specifications Summary

General
Product Name PXI-8431/2 RS422/485 Serial Interface, 2-Port
Product Family Serial
Form Factor PXI Platform
PXI Bus Type PXI Hybrid Compatible
Part Number 778984-01
Operating System/Target Real-Time , Windows
LabVIEW RT Support No
Voltage 5 VDC
Current 500 mA
Source Internally Powered
Power Requirement for +3.3V Rail 0 A
Power Requirement for +5V Rail 500 mA
Power Requirement for +12V Rail 0 A
Power Requirement for -12V Rail 0 A
Slot Two Module No
Module Width 1
MXI Compatible Yes
Serial Standard Compatibility RS-422
Port Information
Number of Ports 2
Max Cable Length 1.2 km
I/O FIFO Buffer Size 128 B
Max Device Connections / Port 31
Handles RTS/CTS Handshake Lines Yes
Interrupt Sharing Between Ports Yes
Direct Memory Access (DMA) Yes
Physical Specifications
Length 16 cm
Width 10 cm
I/O Connector 9-pin D-Sub (DB-9)
Minimum Operating Temperature 0 °C
Maximum Operating Temperature 55 °C

NI PXI-8431/2 Packages

To use the NI PXI-8431/2 , you need all items in the diagram below. Select Option 1 if you already own a PXI System, or Option 2 if you do not already own a chassis, controller, or software.

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PXI System
2 Cables NI PXI-8431/2 Chassis Controller Software
NI PXI-8431/2 and Accessories Only
NI PXI-8431/2 - 778984-01 Qty $ 478 each
Cables - Shielded
Qty $ 27 each
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Estimated Shipping Days: 10 - 15
Package Price: $ 532
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You need a cable to transmit communication signals between devices.
The chassis provides rugged, modular housing for the controller and modules and contains the high-performance PXI backplane, which includes the system's data, timing, and triggering buses.
The controller runs your application and interfaces with your PXI modules.
You need software to interface with your hardware and to collect, analyze, present, and store your measurements. This board is compatible with a variety of programming languages, including LabVIEW, C/C++, Visual Basic, and .NET. LabVIEW provides the easiest integration with all of your NI hardware and is recommended to maximize your hardware investment.

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System Assurance Programs

Reduce your setup time and total cost of ownership, and get a system you can use out of the box with National Instruments system assurance programs. System assurance programs include:

  • Installation and integration test of all individual hardware
  • Courtesy installation of system driver sets and application development environments
  • Extended warranty and calibration coverage for up to five years
  • Custom documentation plus a custom restore and startup utility

This service is only available for PXI, NI CompactRIO, and NI Compact FieldPoint systems.

Extended Warranties

National Instruments designs and manufactures all products to minimize failures, however unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase, covering any repair costs for up to three years. In addition, they offer the following benefits:

  • Significant cost savings compared to individual repair incidents
  • Fault location, diagnostics, and repair by NI any time the system product fails
  • All parts and labor costs covered as well as any adjustments needed to restore the hardware to manufacturing specifications

For more information about your warranty options:

Calibration

NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. NI provides manual calibration procedures, services to recalibrate your products, and automated calibration software to calibrate many NI measurement products.

Training

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Repair Services

Return your registered product under warranty at no additional labor and parts cost. NI offers fault location, diagnostics, and repair any time the system fails as well as any adjustments needed to restore the hardware to manufacturing specifications.

Technical Support

ni.com/support

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