National Instruments SCXI-1378 Bedienungsanleitung

INSTALLATION INSTRUCTIONS

NI SCXI -1378

Terminal Block for the NI SCXI-1130

This guide describes how to install and connect signals to the

National Instruments SCXI-1378 terminal block to configure

the SCXI-1130 as a:

• 4x64, 1-wire matrix

• 4x32, 2-wire matrix

The SCXI-1378 terminal block installs in front of the SCXI-1130 switch

module. The SCXI-1378 has screw terminals available to connect signals

and trigger input and trigger output signals to the terminal block.

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

the terminal block.

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 tip, which alerts you to advisory information.

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.

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NI SCXI-1378 Installation Instructions 2 ni.com

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. This font 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, and code excerpts.

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. Do not install a damaged terminal

block onto a switch module.

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

2. Verify the Components

Make sure that you have the following items:

❑SCXI-1378 terminal block

❑SCXI chassis

❑SCXI-1130 switch module

❑1/8 inch flathead screwdriver

❑Phillips screwdriver

©National Instruments Corporation 3 NI SCXI-1378 Installation Instructions

❑Wire cutter

❑Wire insulation stripper

❑Matrix expansion cable (to expand the columns of a matrix)

❑Matrix expansion plug (to expand the rows of a matrix)

Tip NI recommends using 28 AWG wire (ribbon or discrete) for use with the SCXI-1378

terminal block.

3. Connect Signals

To connect signals to the terminal block, refer to Figures 1 and 2 while

completing the following steps:

1. Prepare the signal wire by stripping the insulation no more than 7 mm.

2. Remove the top cover screw.

3. Unsnap and remove the top cover.

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

5. Run the signal wires through the strain-relief opening.

6. Insert the stripped end of the wire fully into the terminal. Secure the

wire by tightening the screw of the terminal. No bare wire should

extend past the spring terminal. Exposed wire increases the risk of

a short-circuit causing a failure.

Note When connecting wires to the SCXI-1378, refer to Tables 1 and 2 to determine

terminal mapping for the chosen topology.

7. Tighten the two screws on the strain-relief assembly to secure the

cables.

8. Reinstall the top cover.

9. Replace the top cover screw.

NI SCXI-1378 Installation Instructions 4 ni.com

Figure 1. SCXI-1378 Terminal Block

1 Terminal Block Top Cover

2 Signal Wires

3 Safety Ground Lug

4 Screw Terminals

5 Column Connector

6 Rear Connectors

7 Top Cover Screw

8 Thumbscrew

9 Column Connector

10 Strain-Relief Screw

11 Strain-Relief Bar

12 Strain-Relief Opening

13 Row Connector

©National Instruments Corporation 5 NI SCXI-1378 Installation Instructions

Figure 2. SCXI-1378 Terminal Block Signal Connections

USE SHIELDED CABLE

5V MAX

TRIGOUT

GND

TRIGIN

GND

NI SCXI-1378 Terminal Reference Guide

COLUMN

4 X 64 1-Wire Matrix

4 X 32 2-Wire Matrix

128 POSITION ROW EXPANSION CONNECTOR

176 POSITION CONNECTOR 176 POSITION CONNECTOR

128 POSITION ROW EXPANSION CONNECTOR

COLUMN

1-Wire

2-Wire

COLUMN

1-Wire

2-Wire

C0+

C1+

C2+

C3+

C4+

C5+

C6+

C7+

C8+

C9+

C10

C10+

C11

C11+

C12

C12+

C13

C13+

C14

C14+

C15

C15+

C32

C16+

C33

C17+

C34

C18+

C35

C19+

C36

C20+

C37

C21+

C38

C22+

C39

C23+

C40

C24+

C41

C25+

C42

C26+

C43

C27+

C44

C28+

C45

C29+

C46

C30+

C47

C31+

1-Wire

2-Wire

COLUMN

C48

C16-

C49

C17-

C50

C18-

C51

C19-

C52

C20-

C53

C21-

C54

C22-

C55

C23-

C56

C24-

C57

C25-

C58

C26-

C59

C27-

C60

C28-

C61

C29-

C62

C30-

C63

C31-

1-Wire

2-Wire

R0+

1 Wire

2 Wire

ROW

R0-

R1+

R1-

R2+

R2-

R3+

R3-

COLUMN

EXPANSION

CONNECTOR

COLUMN

EXPANSION

CONNECTOR

C16

C0-

C17

C1-

C18

C2-

C19

C3-

C20

C4-

C21

C5-

C22

C6-

C23

C7-

C24

C8-

C25

C9-

C26

C10-

C27

C11-

C28

C12-

C29

C13-

C30

C14-

C31

C15-

NI SCXI-1378 Installation Instructions 6 ni.com

Table 1. 4x64, 1-Wire Matrix Topology Mapping

Software Hardware Software Hardware Software Hardware

r0 ROW 0 c19 COLUMN 19 c42 COLUMN 42

r1 ROW 2 c20 COLUMN 20 c43 COLUMN 43

r2 ROW 4 c21 COLUMN 21 c44 COLUMN 44

r3 ROW 6 c22 COLUMN 22 c45 COLUMN 45

c0 COLUMN 0 c23 COLUMN 23 c46 COLUMN 46

c1 COLUMN 1 c24 COLUMN 24 c47 COLUMN 47

c2 COLUMN 2 c25 COLUMN 25 c48 COLUMN 48

c3 COLUMN 3 c26 COLUMN 26 c49 COLUMN 49

c4 COLUMN 4 c27 COLUMN 27 c50 COLUMN 50

c5 COLUMN 5 c28 COLUMN 28 c51 COLUMN 51

c6 COLUMN 6 c29 COLUMN 29 c52 COLUMN 52

c7 COLUMN 7 c30 COLUMN 30 c53 COLUMN 53

c8 COLUMN 8 c31 COLUMN 31 c54 COLUMN 54

c9 COLUMN 9 c32 COLUMN 32 c55 COLUMN 55

c10 COLUMN 10 c33 COLUMN 33 c56 COLUMN 56

c11 COLUMN 11 c34 COLUMN 34 c57 COLUMN 57

c12 COLUMN 12 c35 COLUMN 35 c58 COLUMN 58

c13 COLUMN 13 c36 COLUMN 36 c59 COLUMN 59

c14 COLUMN 14 c37 COLUMN 37 c60 COLUMN 60

c15 COLUMN 15 c38 COLUMN 38 c61 COLUMN 61

c16 COLUMN 16 c39 COLUMN 39 c62 COLUMN 62

c17 COLUMN 17 c40 COLUMN 40 c63 COLUMN 63

c18 COLUMN 18 c41 COLUMN 41

©National Instruments Corporation 7 NI SCXI-1378 Installation Instructions

4. Expanding Rows & Columns

The SCXI-1378 terminal blocks offers convenient methods for expanding

the rows and/or columns of a matrix using two or more SCXI-1378

terminal blocks. If you are not expanding the rows or columns of the

matrix, skip to the Install the Terminal Block section. For more information

about expanding matrices, refer to the NI Switches Help.

Table 2. 4x32, 2-Wire Matrix Topology Mapping

Software

Hardware

Software

Hardware

+ – + –

r0 ROW 0 ROW 1 c14 COLUMN 14 COLUMN 30

r1 ROW 2 ROW 3 c15 COLUMN 15 COLUMN 31

r2 ROW 4 ROW 5 c16 COLUMN 32 COLUMN 48

r3 ROW 6 ROW 7 c17 COLUMN 33 COLUMN 49

c0 COLUMN 0 COLUMN 16 c18 COLUMN 34 COLUMN 50

c1 COLUMN 1 COLUMN 17 c19 COLUMN 35 COLUMN 51

c2 COLUMN 2 COLUMN 18 c20 COLUMN 36 COLUMN 52

c3 COLUMN 3 COLUMN 19 c21 COLUMN 37 COLUMN 53

c4 COLUMN 4 COLUMN 20 c22 COLUMN 38 COLUMN 54

c5 COLUMN 5 COLUMN 21 c23 COLUMN 39 COLUMN 55

c6 COLUMN 6 COLUMN 22 c24 COLUMN 40 COLUMN 56

c7 COLUMN 7 COLUMN 23 c25 COLUMN 41 COLUMN 57

c8 COLUMN 8 COLUMN 24 c26 COLUMN 42 COLUMN 58

c9 COLUMN 9 COLUMN 25 c27 COLUMN 43 COLUMN 59

c10 COLUMN 10 COLUMN 26 c28 COLUMN 44 COLUMN 60

c11 COLUMN 11 COLUMN 27 c29 COLUMN 45 COLUMN 61

c12 COLUMN 12 COLUMN 28 c30 COLUMN 46 COLUMN 62

c13 COLUMN 13 COLUMN 29 c31 COLUMN 47 COLUMN 63

NI SCXI-1378 Installation Instructions 8 ni.com

Row Expansion

Figure 3 shows how to expand the rows of a 4x32 matrix using a matrix

expansion plug. The matrix expansion plug connects columns to expand

the rows. To expand the rows of a matrix, complete the following steps:

1. Connect two SCXI-1378 terminal blocks to the front connectors of

two adjacent SCXI-1130 modules.

2. Tighten the top and bottom chassis screws on the back of the terminal

block rear panels to hold them securely in place.

3. Connect a matrix expansion plug to the top or bottom column

connectors of the two SCXI-1378 terminal blocks.

Figure 3. Row Expansion with the SCXI-1378

1 Matrix Expansion Plug 2 Thumbscrews 3 Column Connector

Module 1

Matrix

Expansion

Plug

Module 2

©National Instruments Corporation 9 NI SCXI-1378 Installation Instructions

Column Expansion

Figure 4 shows how to expand the columns of a 4x32 matrix using a matrix

expansion cable. The matrix expansion cable connects rows to expand the

columns. To expand the columns of a matrix, complete the following steps:

1. Connect one end of the matrix expansion cable to one of the ROW

CONNECTION CABLE terminals in one of the SCXI-1378 terminal

blocks.

2. Connect the other end of the matrix expansion cable to one of the ROW

CONNECTION CABLE terminals in another SCXI-1378.

3. Connect the two SCXI-1378 terminal blocks to the front connectors of

the two SCXI-1130 modules.

4. Tighten the top and bottom chassis screws on the back of the terminal

block rear panels to hold them securely in place.

Figure 4. Column Expansion with the SCXI-1378

1 SCXI-1378 2 Matrix Expansion Cable 3Row Connection Cable Terminals

Module 1 Matrix

Expansion

Cable

Module 2

NI SCXI-1378 Installation Instructions 10 ni.com

5. Install the Terminal Block

To connect the SCXI-1378 terminal block to the SCXI-1130 front panel,

refer to Figure 5 and complete the following steps (the SCXI-1130 should

already be installed in an SCXI chassis):

1. Plug the SCXI-1378 onto the front connectors of the SCXI-1130.

2. Tighten the top and bottom thumbscrews on the back of the terminal

block rear panel to hold it securely in place.

Figure 5. Installing the SCXI-1378 Terminal Block

1 Thumbscrew 2 Front Connectors 3 SCXI-1130 4 SCXI-1378

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