National Instruments PXIe-8521 User Manual
USER MANUAL
PXIe-8521
4-port, 100BASE-T1 PXI Automotive Ethernet Interface Module
This document explains how to install and configure the PXIe-8521 module.
Contents
Introduction...............................................................................................................................1
Getting Started.......................................................................................................................... 2
Installing the PXIe-8521................................................................................................... 2
PXIe-8521 Pinout..............................................................................................................4
Connection Guidelines......................................................................................................4
Port Modes........................................................................................................................ 5
PHY State..........................................................................................................................8
Configuring the PXIe-8521 in MAX................................................................................ 9
Programming the PXIe-8521............................................................................................ 9
LED Functionality...................................................................................................................10
Synchronization Methods....................................................................................................... 10
Local Time...................................................................................................................... 10
Network Time..................................................................................................................11
Host Time........................................................................................................................11
PXI Triggers....................................................................................................................11
Introduction
Kit Contents
• PXIe-8521 module
• 26 AWG x 8 mm insulated ferrules, x 20
• Screw driver for use with connector spring terminal push buttons
• PXIe-8521 Safety, Environmental, and Regulatory Information
Note The PXIe-8521 ships with plug connectors pre-installed on each port.
Getting Started
NI PXIe-1062Q
1
2 3
4
5
Installing the PXIe-8521
Notice To prevent damage to the PXIe-8521 caused by ESD or contamination,
handle the module using the edges or the metal bracket.
1. Ensure the AC power source is connected to the chassis before installing the module.
The AC power cord grounds the chassis and protects it from electrical damage while you
install the module.
2. Power off the chassis.
3. Inspect the slot pins on the chassis backplane for any bends or damage prior to
installation. Do not install a module if the backplane is damaged.
4. Remove the black plastic covers from all the captive screws on the module front panel.
5. Identify a supported slot in the chassis. The following figure shows the symbols that
indicate the slot types.
Figure 1. Chassis Compatibility Symbols
1. PXI Express System Controller Slot
2. PXI Peripheral Slot
3. PXI Express Hybrid Peripheral Slot
4. PXI Express System Timing Slot
5. PXI Express Peripheral Slot
PXIe-8521 modules can be placed in PXI Express peripheral slots, PXI Express hybrid
peripheral slots, or PXI Express system timing slots.
6. Touch any metal part of the chassis to discharge static electricity.
7. Ensure that the ejector handle is in the downward (unlatched) position.
8. Place the module edges into the module guides at the top and bottom of the chassis. Slide
the module into the slot until it is fully inserted.
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Figure 2. Module Installation
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3
NI PXIe-1075
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1. Chassis
2. Hardware Module
3. Ejector Handle in Downward (Unlatched) Position
9. Latch the module in place by pulling up on the ejector handle.
10. Secure the module front panel to the chassis using the front-panel mounting screws.
Note Tightening the top and bottom mounting screws increases mechanical
stability and also electrically connects the front panel to the chassis, which can
improve the signal quality and electromagnetic performance.
11. Cover all empty slots using EMC filler panels or fill using slot blockers to maximize
cooling air flow, depending on your application.
12. Power on the chassis.
PXIe-8521 User Manual | © National Instruments | 3
PORT 1
LINK/
ACT
STATUS
TAP
PORT 2
LINK/
ACT
STATUS
PORT 3
LINK/
ACT
STATUS
TAP
PORT 4
LINK/
ACT
STATUS
PXIe-8521
100BASE-T1
PORT 1
LINK/
ACT
STATUS
Link/Act
LED
Port Identification
Status
LED
Pin 1
Pin 2
Pin 3
Tap
Pairs
Ports
PXIe-8521 Pinout
Figure 3. PXIe-8521 Pinout
Pin Number Signal Type Signal Direction Signal Description Signal Required
1 TRX_P Bi-directional Transceiver plus Required
2 TRX_M Bi-directional Transceiver minus Required
3 Shield — Shield Optional
Connection Guidelines
Notice Operate this product only with cables less than 15 m in length.
Table 1. PXIe-8521 Pinout Signal Descriptions
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