National Instruments TB-2627 Manual de usuario

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INSTALLATION INSTRUCTIONS

NI TB-2627

Terminal Block for the NI PXI/PXIe-2527

This guide describes how to install and connect signals to the

National Instruments TB-2627 terminal block to configure your

NI PXI/PXIe-2527 switch module as one of the following:

• 64 × 1 1-wire multiplexer

• 32 × 1 2-wire multiplexer

• 16 × 1 4-wire multiplexer

• Dual 32 × 1 1-wire multiplexer

• Dual 16 × 1 2-wire multiplexer

Refer to the NI Switches Getting Started Guide to determine when to install

the NI TB-2627.

Introduction

The NI TB-2627 terminal block installs in front of the NI PXI/PXIe-2527

switch module. The NI TB-2627 has screw terminals that provide access to

all channels of the multiplexer.

Caution The NI TB-2627 is rated for 300 V, Measurement Category I. Do not use this

module with the NI PXI/PXIe-2527 for connections to signals or for measurements within

Categories II, III, or IV. Do not connect to MAINs supply circuits (for example, wall

outlets) of 115 or 230 VAC. Refer to the Read Me First: Safety and Electromagnetic

Compatibility document for more information on measurement categories.

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NI TB-2627 Installation Instructions 2 ni.com

Conventions

The following conventions are used in this guide:

»The »symbol leads you through nested menu items and dialog box options

to a final action. The sequence File»Page Setup»Options directs you to

pull down the File menu, select the Page Setup item, and select Options

from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to

avoid injury, data loss, or a system crash.

When symbol is marked on a product, it denotes a warning advising you to

take precautions to avoid electrical shock.

bold Bold text denotes items that you must select or click in the software, such

as menu items and dialog box options. Bold text also denotes parameter

names.

italic Italic text denotes variables, emphasis, a cross-reference, or an introduction

to a key concept. Italic text also denotes text that is a placeholder for a word

or value that you must supply.

monospace Text in this font denotes text or characters that you should enter from the

keyboard, sections of code, programming examples, and syntax examples.

This font is also used for the proper names of disk drives, paths, directories,

programs, subprograms, subroutines, device names, functions, operations,

variables, filenames, and extensions.

1. Unpack the Terminal Block

To avoid damage when you handle the terminal block, take the following

precautions:

Caution Never touch the exposed pins of connectors.

• Ground yourself using a grounding strap or by touching a grounded

object.

• Touch the antistatic package to a metal part of the chassis before you

remove the terminal block from the package.

Remove the terminal block from the package and inspect the terminal block

for loose components or any sign of damage. Notify NI if the terminal

block appears damaged in any way.

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©National Instruments Corporation 3 NI TB-2627 Installation Instructions

Caution Do not install a damaged terminal block on a switch terminal block.

Store the terminal block in the antistatic package when not in use.

2. Verify the Components

Make sure you have the following:

❑NI TB-2627 terminal block

❑NI PXI/PXIe-2527 switch module

❑PXI chassis

❑1/8 in. flathead screwdriver

❑Wire cutter

❑Wire insulation stripper

3. Connect Signals

Caution Ensure that power has not been applied to signals prior to connection. Only

trained and qualified service personnel should install and connect signals.

To connect signals to the terminal block, complete the following steps:

1. Prepare the signal wire by stripping the insulation no more than

3/16 of an inch from the end of the wire.

2. Remove the terminal block top cover screws with the flathead

screwdriver.

3. Gently lift the top cover off the terminal block.

4. Loosen the two screws on the strain-relief assembly and remove the

top strain-relief bar.

5. Connect the safety earth ground to a safety ground lug.

6. Connect the wire to the terminal by inserting the stripped end of the

wire into the terminal. When connecting a signal, refer to the terminal

reference diagram in Figure 4.

7. Tighten the screw for the terminal to secure the connection.

8. Pull the wire through the strain-relief bar to remove the slack in the

wiring.

9. Replace the strain-relief bar and tighten the two screws on the

strain-relief assembly to secure the cables.

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NI TB-2627 Installation Instructions 4 ni.com

10. Replace the terminal block top cover.

11. Secure the terminal block top cover with the top cover screw.

Figure 1. NI TB-2627 Terminal Block

1 Terminal Block Top Cover

2 Top Cover Screw

3 Safety Ground Lug

4 Chassis Screws

5 Strain-Relief Screws

6 Strain-Relief Opening

7 Strain-Relief Bar

8ScrewTerminals

9 Rear Connector

10 Analog Bus*

* For connection to a DMM, use the HV6-BAN4 DMM cable described in the

Accessories section.

Connect

COM0+

pin 1

COM0–

COM1+

COM1–

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©National Instruments Corporation 5 NI TB-2627 Installation Instructions

Caution In order to comply with standards and laws governing electromagnetic

compatibility (EMC), you must install the NI 711627-01 snap-on ferrite shipped with the

NI TB-2627 terminal block. Install the ferrite as close to the NI TB-2627 terminal block as

possible. Wrap all wires exiting the terminal block around one side of the ferrite so that

they pass through the ferrite twice, as shown in Figure 2 and Figure 3.

Figure 2. Open Ferrite Near Ends of Power Wires

Figure 3. Closed Ferrite

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NI TB-2627 Installation Instructions 6 ni.com

Figure 4. NI TB-2627 Terminal Reference Diagram

WARNING: IF HIGH VOLTAGE ISPRESENT, CONNECT A SAFETY

EARTH GROUND TO THE SAFETY GROUND LUG.

NI TB-2627 Terminal Reference Guide

100 POSITION CONNECTOR

14–

14+

13–

13+

12–

12+

11–

11+

0–

1WREF1

1WREF0

COM1–

COM1+

COM0–

COM0+

19–

19+

18–

18+

17–

17+

16–

16+

15–

15+

5–

4–

3–

2–

1–

24–

24+

23–

23+

22–

22+

21–

21+

20–

20+

10–

10+

9–

8–

7–

6–

31–

31+

30–

30+

29–

29+

28–

28+

27–

27+

26–

26+

25–

25+

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©National Instruments Corporation 7 NI TB-2627 Installation Instructions

Table 1. 64 ×1 1-Wire Topology Terminal Mapping

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

ch0 0+ ch14 14+ ch28 28+ ch42 10– ch56 24–

ch1 1+ ch15 15+ ch29 29+ ch43 11– ch57 25–

ch2 2+ ch16 16+ ch30 30+ ch44 12– ch58 26–

ch3 3+ ch17 17+ ch31 31+ ch45 13– ch59 27–

ch4 4+ ch18 18+ ch32 0– ch46 14– ch60 28–

ch5 5+ ch19 19+ ch33 1– ch47 15– ch61 29–

ch6 6+ ch20 20+ ch34 2– ch48 16– ch62 30–

ch7 7+ ch21 21+ ch35 3– ch49 17– ch63 31–

ch8 8+ ch22 22+ ch36 4– ch50 18– 1wref0 1WREF0

ch9 9+ ch23 23+ ch37 5– ch51 19– 1wref1 1WREF1

ch10 10+ ch24 24+ ch38 6– ch52 20– com0+ COM0+

ch11 11+ ch25 25+ ch39 7– ch53 21– com0– COM0–

ch12 12+ ch26 26+ ch40 8– ch54 22– com1+ COM1+

ch13 13+ ch27 27+ ch41 9– ch55 23– com1– COM1–

Table 2. 32 ×1 2-Wire Topology Terminal Mapping

Software

Name

Terminal Software

Name

Terminal Software

Name

Ter mi na l

+ – + – + –

ch0 0+ 0– ch12 12+ 12– ch24 24+ 24–

ch1 1+ 1– ch13 13+ 13– ch25 25+ 25–

ch2 2+ 2– ch14 14+ 14– ch26 26+ 26–

ch3 3+ 3– ch15 15+ 15– ch27 27+ 27–

ch4 4+ 4– ch16 16+ 16– ch28 28+ 28–

ch5 5+ 5– ch17 17+ 17– ch29 29+ 29–

ch6 6+ 6– ch18 18+ 18– ch30 30+ 30–

ch7 7+ 7– ch19 19+ 19– ch31 31+ 31–

ch8 8+ 8– ch20 20+ 20– com0 COM0+ COM0–

ch9 9+ 9– ch21 21+ 21– com1 COM1+ COM1–

ch10 10+ 10– ch22 22+ 22–

ch11 11+ 11– ch23 23+ 23–

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NI TB-2627 Installation Instructions 8 ni.com

Table 3. 16 ×1 4-Wire Topology Terminal Mapping

Software

Name

Terminal Software

Name

Terminal

A+ A– B+ B– A+ A– B+ B–

ch0 0+ 0– 16+ 16– ch9 9+ 9– 25+ 25–

ch1 1+ 1– 17+ 17– ch10 10+ 10– 26+ 26–

ch2 2+ 2– 18+ 18– ch11 11+ 11– 27+ 27–

ch3 3+ 3– 19+ 19– ch12 12+ 12– 28+ 28–

ch4 4+ 4– 20+ 20– ch13 13+ 13– 29+ 29–

ch5 5+ 5– 21+ 21– ch14 14+ 14– 30+ 30–

ch6 6+ 6– 22+ 22– ch15 15+ 15– 31+ 31–

ch7 7+ 7– 23+ 23– com0 COM0+ COM0– COM1+ COM1–

ch8 8+ 8– 24+ 24–

Table 4. Dual 32 ×1 1-Wire Topology Terminal Mapping

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

Software

Name Terminal

ch0 0+ ch14 14+ ch28 12– ch42 26+ ch56 24–

ch1 1+ ch15 15+ ch29 13– ch43 27+ ch57 25–

ch2 2+ ch16 0– ch30 14– ch44 28+ ch58 26–

ch3 3+ ch17 1– ch31 15– ch45 29+ ch59 27–

ch4 4+ ch18 2– ch32 16+ ch46 30+ ch60 28–

ch5 5+ ch19 3– ch33 17+ ch47 31+ ch61 29–

ch6 6+ ch20 4– ch34 18+ ch48 16– ch62 30–

ch7 7+ ch21 5– ch35 19+ ch49 17– ch63 31–

ch8 8+ ch22 6– ch36 20+ ch50 18– 1wref0 1WREF0

ch9 9+ ch23 7– ch37 21+ ch51 19– 1wref1 1WREF1

ch10 10+ ch24 8– ch38 22+ ch52 20– com0+ COM0+

ch11 11+ ch25 9– ch39 23+ ch53 21– com0– COM0–

ch12 12+ ch26 10– ch40 24+ ch54 22– com1+ COM1+

ch13 13+ ch27 11– ch41 25+ ch55 23– com1– COM1–

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©National Instruments Corporation 9 NI TB-2627 Installation Instructions

Table 5. Dual 16 ×1 2-Wire Topology Terminal Mapping

Software

Name

Terminal Software

Name

Terminal Software

Name

Ter mi na l

+ – + – + –

ch0 0+ 0– ch12 12+ 12– ch24 24+ 24–

ch1 1+ 1– ch13 13+ 13– ch25 25+ 25–

ch2 2+ 2– ch14 14+ 14– ch26 26+ 26–

ch3 3+ 3– ch15 15+ 15– ch27 27+ 27–

ch4 4+ 4– ch16 16+ 16– ch28 28+ 28–

ch5 5+ 5– ch17 17+ 17– ch29 29+ 29–

ch6 6+ 6– ch18 18+ 18– ch30 30+ 30–

ch7 7+ 7– ch19 19+ 19– ch31 31+ 31–

ch8 8+ 8– ch20 20+ 20– com0 COM0+ COM0–

ch9 9+ 9– ch21 21+ 21– com1 COM1+ COM1–

ch10 10+ 10– ch22 22+ 22–

ch11 11+ 11– ch23 23+ 23–

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