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National Instruments · PXI

PXI-8433/4

The National Instruments PXI-8433/4 is a four-port isolated RS-485/RS-422 serial interface module for PXI systems. It provides isolation between ports and between the ports and host PC.

ManufacturerNational Instruments
ModelPXI-8433/4
Product TypeIsolated RS-485/RS-422 serial interface module
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PlatformPXI
Serial ports4
ProtocolsRS-485 and RS-422
IsolationPort-to-port and port-to-PC
Maximum baud rate3 Mbaud; 2 Mbaud in RS-485 two-wire auto-control mode
Serial connector type10P10C
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Overview

Product overview

Key product information and technical features.

The PXI-8433/4 adds four isolated differential serial ports to a PXI system for communication with RS-485 and RS-422 equipment. NI lists this model among the interfaces supported by NI-Serial 21.3.

The module uses 10P10C serial connectors and has a listed FIFO size of 128 bytes. Check the NI connector pinout and transceiver-mode requirements before selecting cables or configuring the serial bus.

  • Four serial ports supporting RS-485 and RS-422.
  • Port-to-port and port-to-host isolation.
  • Baud rates up to 3 Mbaud, with a 2 Mbaud limit for RS-485 two-wire auto-control mode.
  • 10P10C serial connections and a listed 128-byte FIFO.
Verified specifications

Technical data

Verified product specifications.

Bus interfacePXI
Number of serial ports4 ports
Supported serial protocolsRS-485; RS-422
Isolation typePort-to-port; port-to-PC
Maximum baud rate3 Mbaud
Maximum baud rate in RS-485 two-wire auto-control mode2 Mbaud
Serial connector type10P10C
FIFO size128 bytes
Condition & included items

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Condition

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Included

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Revision

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Compatibility

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National Instruments

Manufacturer

PXI

System platform

PXI-8433/4

Four-port isolated RS-485/RS-422 interface

Driver reference

Listed in NI-Serial 21.3 supported hardware.

Verify chassis slot suitability, driver and operating-system support, and cable pinout for the intended system.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI Serial Hardware Specifications and Features GuideHardware Specifications And Features Guide · docs-be.ni.com
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NI-Serial 21.3 ReadmeDriver Readme And Supported Hardware · ni.com
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PXI-8433/4 Product CertificationsProduct Certification Resources · ni.com
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Archived NI Support: Overvoltage Protection in NI PXI-8433Technical resource
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Shipping, warranty & returns

Commercial terms

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Warranty
30-Day Warranty. Standard coverage applies.
Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does the PXI-8433/4 support RS-232?

NI specifies RS-485 and RS-422 for this model, not RS-232.

What is the maximum baud rate?

The listed maximum is 3 Mbaud. RS-485 two-wire auto-control mode is limited to 2 Mbaud.

What connectors does the PXI-8433/4 use?

NI lists 10P10C connectors for this model. Consult the hardware guide's 10-position modular jack pin descriptions when selecting or wiring cables.

Are the serial ports isolated from each other?

Yes. NI identifies both port-to-port and port-to-host isolation for the PXI-8433/4.

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