National Instruments 2806 Manual de usuario

INSTALLATION INSTRUCTIONS

NI 2806

Expansion Bridge for the NI SwitchBlock

This document describes how to install the NI 2806 expansion bridge for the NI SwitchBlock.

Installing the NI 2806 expansion bridge enables you to connect the analog buses of multiple

NI SwitchBlock carriers.

For information about enabling multiple devices to connect to the same analog bus line, refer to

the NI Switches Help.

National Instruments recommends using NI Switch Executive for multicarrier systems. The

NI Switch Executive Help includes information about creating multicarrier virtual devices using

NI Switch Executive.

What You Need to Get Started

To use the expansion bridge, you need the following items:

❑NI 2806 expansion bridge for the NI SwitchBlock

❑Two NI PXI-2800 NI SwitchBlock carriers

❑#1 Phillips screwdriver

Getting Started with the NI 2806 Expansion Bridge for

the NI SwitchBlock

Complete the following steps to install the NI 2806 expansion bridge between

two NI SwitchBlock carriers.

1. Power off the chassis.

2. Determine which expansion bridge connectors on each carrier will connect to the expansion

bridge.

When the carriers you want to connect are adjacent to each other in a PXI chassis, the

expansion bridge connectors that face each other will connect to the expansion bridge.

3. Refer to Figure 1 and unscrew the two screws on the expansion bridge connector covers

determined in step 2 using the #1 Phillips screwdriver.

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NI 2806 Installation Instructions 2 ni.com

4. Remove the expansion bridge connector covers only from the expansion bridge connectors

that will connect to the expansion bridge.

Caution You must replace the expansion bridge connector covers if you remove the

NI 2806 expansion bridge.

Figure 1. Removing the Expansion Bridge Connector Cover from the NI PXI-2800

5. Insert the NI PXI-2800 carriers in adjacent positions in the chassis. For carrier installation

instructions, refer to the NI Switches Getting Started Guide.

6. Ensure that you hold the expansion bridge in the correct orientation as shown in Figure 2.

Note the THIS EDGE UP silk screen on the PCB.

1 NI PXI-2800 Carrier 2 Screws 3 Expansion Bridge Connector Cover

©National Instruments Corporation 3 NI 2806 Installation Instructions

Figure 2. Correct Orientation of the NI 2806 Expansion Bridge

7. Refer to Figure 3 and insert the NI 2806 expansion bridge between the two carriers until the

latches engage.

Figure 3. Inserting the NI 2806 Expansion Bridge

1Chassis

2 NI PXI-2800 Carriers

3 NI 2806 Expansion Bridge

4 Latches

THISEDGE UP

ANALOG BUS

2A, 150V CAT I MAX

NI 2806 Expansion Bridge

for NI SwitchBlock

NI 2806 EXPANSION BRIDGE FOR NI SWITCHBLOCK

FOR PATENTS:

NI.COM/PATENTS

ASSY 150041A-01L

NI PXI-1045

375530B Aug11

LabVIEW, National Instruments, NI, ni.com, the National Instruments corporate logo, and the Eagle logo are trademarks of National Instruments

Corporation. Refer to the Trademark Information at ni.com/trademarks for other National Instruments trademarks. Other product and

company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments

products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National

Instruments Patents Notice at ni.com/patents. Refer to the Export Compliance Information at ni.com/legal/export-compliance

for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data.

If the latches do not engage, ensure that the expansion bridge is inserted in the orientation

shown in Figure 2. The expansion bridge fully inserts only with the correct edge up.

Note The NI 2806 expansion bridge should not be used above the operational shock

limit. Refer to the NI SwitchBlock carrier or card specifications for these limits.

Remove or secure the NI 2806 prior to shipping and prior to use in a high-shock

environment.

Note To prevent unintentional shorts of source channels between hardwire analog

bus paths, you cannot use any NI SwitchBlock carrier connected by the NI 2806

expansion bridge until all connected carriers have been loaded by the driver. Failure

to load the driver on any carrier connected by the expansion bridge will disable all

other carriers connected to the same bus.

Removing the NI 2806 Expansion Bridge

Complete the following steps to remove the NI 2806 expansion bridge:

1. Power off the chassis.

2. Squeeze the expansion bridge latches and pull gently on the expansion bridge.

3. Remove the carriers that were connected to the expansion bridge.

4. Reinstall the expansion bridge connector covers with the provided 2-56 × 3/16 inch long,

pan head screws.

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