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NI PCI-485/4

RS485, 4-Port Interface

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  • Discontinued: Consider the NI PCI-8431/2 interface for faster performance.
  • 460.8 kbits/s maximum transfer rate
  • NI-Serial device driver works with NI-VISA for easy development
  • Compatible with Windows XP/2000/Me/9x/NT
  • Handles RTS/CTS hardware handshake lines
  • Interrupt sharing between ports


The National Instruments serial interface boards for PCI are asynchronous serial interfaces for communicating with serial devices. RS485 interfaces are available with up to eight ports. Isolated interfaces are available with up to four ports. You can install and use these boards as standard serial ports from your applications. All interface boards include an enhanced serial driver for improved performance, reliable interrupt sharing between ports, and access to the advanced transceiver control mode of the RS485 interface boards.

This interface is discontinued and has been superseded by the NI PCI-843x next-generation serial interfaces, which offer increased performance and functionality at the same price as the discontinued boards.

No part number and pricing information available for NI PCI-485/4.

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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:

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