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National Instruments · PXI Express

NI PXIe-8521

NI PXIE-8521 is a PXI Express 4-port 100BASE-T1 automotive Ethernet interface module designed for NI-XNET-based development and network test applications.

ManufacturerNational Instruments

ModelPXIe-8521

Product TypePXI Express automotive Ethernet interface module

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ManufacturerNI

ModelPXIe-8521

Part number786771-01

Bus / form factorPXI Express

Port count4 ports

Physical layer100BASE-T1 unshielded twisted pair automotive Ethernet

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Overview

Product overview

Key product information and technical features.

NI PXIE-8521 is an NI PXI Express automotive Ethernet interface module described by NI as a 4-port 100BASE-T1 PXI Automotive Ethernet Interface Module. Within NI’s Automotive Ethernet family, this specific SKU is the PXIe-8521 hardware module; the official NI product page identifies part number 786771-01, and no additional materially different PXIe-8521 variants were confirmed in the supplied official sources. https://www.ni.com/en/shop/hardware/automotive-ethernet/model-pxie-8521

The module provides four 100BASE-T1 unshielded twisted pair automotive Ethernet ports and is intended for developing applications with the NI-XNET driver. NI also states that the PXIe-8521 provides up to four independent endpoints or up to two network terminal access points (TAPs), giving flexibility for node simulation, traffic access, and measurement workflows on automotive Ethernet networks. https://www.ni.com/en/shop/hardware/automotive-ethernet/model-pxie-8521

According to the PXIe-8521 User Manual, each port can operate in Direct mode or Tap mode. NI further states that each port has an independent network time keeper using IEEE 802.1AS, and when monitoring is enabled, all traffic transmitted or received on that port is captured and timestamped by both the local time keeper and the port’s network time keeper. NI also highlights onboard hardware timestamping and support for operation as up to four separate 802.1AS masters or slaves. https://www.ni.com/docs/en-US/bundle/pxie-8521-feature/page/port-modes.html https://www.ni.com/en/shop/hardware/automotive-ethernet/model-pxie-8521

4-port 100BASE-T1 PXI Automotive Ethernet Interface Module.
Provides up to four independent endpoints.
Provides up to two network terminal access points (TAPs).
Supports Direct mode and Tap mode operation on its ports.
Features onboard hardware timestamping.
Can act as up to four separate 802.1AS masters or slaves.
Front-panel LEDs support link/activity monitoring.

Verified specifications

Technical data

Verified product specifications.

Manufacturer	NI
Model	PXIe-8521
Part number	786771-01
Bus / form factor	PXI Express
Port count	4 ports
Physical layer	100BASE-T1 unshielded twisted pair automotive Ethernet
Maximum baud rate	125 MHz
Operating temperature range	0 to 55 °C
External timing/triggering	Yes

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National Instruments

Manufacturer

PXI Express

Platform

PXIE-8521

PXI Express automotive Ethernet interface module

Interface

4-port 100BASE-T1 Automotive Ethernet

Manuals & software

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PXIe-8521 User Manual - Port ModesOfficial Manufacturer Manual · ni.com

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FAQ

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What is the NI PXIE-8521?

NI describes the PXIe-8521 as a PXIe, 4-Port, 100BASE-T1 PXI Automotive Ethernet Interface Module.

How many ports does the PXIe-8521 provide?

NI states that the PXIe-8521 is a 4-port module, and the user manual says the module includes four ports.

What port modes are supported on the PXIe-8521?

According to the NI user manual, the ports can function in Direct mode or Tap mode.

Does the PXIe-8521 support time synchronization and timestamping?

Yes. NI states that the PXIe-8521 features onboard hardware timestamping and can act as up to four separate 802.1AS masters or slaves; the user manual adds that each port has an independent network time keeper using IEEE 802.1AS.

Which driver family supports the PXIe-8521?

NI says the PXIe-8521 is for developing applications with the NI-XNET driver, and NI-XNET release documentation explicitly lists support for the module.