National Instruments PXI-8423/2 Isolated two-port serial interface module
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National Instruments · PXI

PXI-8423/2

The National Instruments PXI-8423/2 provides two isolated RS-485/RS-422 serial ports in a PXI module, with male DB-9 connections.

ManufacturerNational Instruments
ModelPXI-8423/2
Product TypeIsolated two-port serial interface module
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30-Day Warrantystandard coverage
30-Day Returnspolicy applies
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Ports2
Serial standardsRS-485 and RS-422
WiringTwo- and four-wire devices supported
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Overview

Product overview

Key product information and technical features.

This module belongs to NI’s PXI serial hardware family. Its isolated ports address serial communication where ground-level differences or electrical noise are concerns.

  • Four hardware transceiver control modes.
  • 16550-compatible UARTs.
  • FIFO buffering reduces susceptibility to interrupt latency.
Verified specifications

Technical data

Verified product specifications.

Port count2 ports
ConnectorDB-9 male
Continuous isolation, port-to-port and port-to-host60 VDC, CAT I
Isolation withstand, port-to-port and port-to-host2000 Vrms; 5-second dielectric withstand test
Supply requirement+5 VDC; 800 mA typical, 1.3 A maximum
Board dimensions100 × 160 mm
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Compatibility

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National Instruments

Manufacturer

PXI

Hardware platform

PXI-8423/2

Isolated serial interface

Compatibility

Supports two- and four-wire RS-485 devices through hardware transceiver control modes.

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FAQ

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Product-specific answers based on available technical information.

Does the PXI-8423/2 support RS-422?

Yes. NI documents RS-422 and RS-485 support.

Is 2000 V the continuous isolation rating?

No. The 2000 Vrms rating is a 5-second withstand test; continuous isolation is 60 VDC, CAT I.

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