NI PXI-8431/4 (RS485/422)

The National Instruments PXI-8431/4 is a high-performance, four-port serial interface for high-speed communication with RS485 devices at rates of up to 3 Mb/s. High-performance RS485 interfaces are also available with two ports. The NI PXI-8431/4 offers flexible baud rates for data transmissions between 57 b/s and 3,000 kb/s 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 that use serial communication with the PXI-8431/4.

Additional Product Information

Related Information

• Serial Support (Drivers, Manuals, KnowledgeBase, Examples, Tutorials)
• Tutorial: How to Do a Serial Loopback Test
• Tutorial: Serial Communication Overview
• Tutorial: NI Serial Interface FAQs
• Manual: Serial Quick Reference Guide

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
• Three-year warranty and calibration coverage
• Custom documentation plus a custom restore and startup utility

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

• Learn More About System Configuration and Deployment Services
• Customize Your NI CompactRIO System
• Customize Your NI Compact FieldPoint System
• Customize Your PXI System
• Talk to an Expert About Custom System Configurations

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:

• Learn More About Warranty Services
• Talk to an Expert About Extended Warranties
• View Warranty Repair Policies

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.

• Learn More About Calibration Services

Training

NI training is the fastest, most certain route to productivity with NI tools and successful application development.

• Learn More About NI Training and Certification
• Find a Course Near You and View Schedules

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.

• Learn More About Repair Services
• Contact NI to obtain a Return Material Authorization (RMA) form and shipping instructions.
• View your RMA support request status online.
• Register your product.

Technical Support

ni.com/support