NI SCXI-1334 Manual de usuario
INSTALLATION GUIDE
NI SCXI-1334
Terminal Block for the NI SCXI-1129
This guide describes how to install and connect signals to the National Instruments SCXI-1334
terminal block to configure the SCXI-1129 switch module as a 4 × 64 matrix.
Screw terminals on the SCXI-1334 allow you to access the 4 × 64 matrix. The SCXI-1334 also
contains terminals for scanner advanced output and external input trigger signals, two 128-pin
DIN connectors for connecting columns between modules, and 10-pin headers for connecting
rows between modules using expansion cables.
Refer to the NI Switches Getting Started Guide to determine when to install the terminal block.
Contents
Unpacking the Kit..................................................................................................................... 1
Verifying the Components........................................................................................................ 2
Connecting Signals................................................................................................................... 2
Expanding the Number of Columns..........................................................................................4
Installing the Terminal Block....................................................................................................6
Expanding the Number of Rows...............................................................................................7
Unpacking the Kit
Caution To prevent electrostatic discharge (ESD) from damaging the device,
ground yourself using a grounding strap or by holding a grounded object, such as
your computer chassis.
1. Touch the antistatic package to a metal part of the computer chassis.
2. Remove the device from the package and inspect the device for loose components or any
other sign of damage.
Caution Never touch the exposed pins of connectors.
Note Do not install a device if it appears damaged in any way.
3. Unpack any other items and documentation from the kit.
Store the device in the antistatic package when the device is not in use.
Verifying the Components
Make sure that you have the following components.
• SCXI-1334 terminal block
• SCXI chassis
• SCXI-1129 switch module
• 1/8 in. flathead screwdriver
• Numbers 1 and 2 Phillips screwdrivers
• Long-nose pliers
• Wire cutter
• Wire insulation stripper
• Matrix expansion plug (to expand the number of rows of a matrix)
• Matrix expansion cable (to expand the number of columns of a matrix)
Connecting Signals
Caution This module is rated for Measurement Category I and intended to carry
signal voltages no greater than 150 V. This module can withstand up to 800 V
impulse voltage. Do not use this module for connection 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 NI Switches
Getting Started Guide for more information on measurement categories.
When hazardous voltages (>42.4 Vpk/60 VDC) are present on any relay terminal, safety low-
voltage (≤42.4 Vpk/60 VDC) cannot be connected to any other relay terminal
1. Prepare the signal wire by stripping the insulation no more than 7 mm from the end of the
wire.
2. Remove the top cover screw.
3. Unsnap and remove the top cover.
4. Loosen the two strain-relief screws on the strain-relief bar.
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 screw terminal. Exposed
wire increases the risk of a short-circuit causing a failure.
7. Connect the safety earth ground to the safety ground lug.
8. Tighten the two screws on the strain-relief assembly to secure the cables.
9. Reinstall the top cover.
10. Replace the top cover screw.
2| ni.com | NI SCXI-1334 Installation Guide
Figure 1. SCXI-1334 Top Cover Diagram
1
2
NI SCXI-1334 Installation Guide | © National Instruments | 3
Figure 2. SCXI-1334 Parts Locator Diagram
1
8
2
1
7
2
2
6
6
3
4
5
1. Column connectors
2. Screw terminals
3. Rear connector
4. Thumbscrew
5. Strain-Relief Screw
6. Row Connectors
7. Strain-Relief Bar
8. Safety Ground Lug
Expanding the Number of Columns
The SCXI-1334 offers convenient methods for expanding the number of columns of a matrix
using two or more SCXI-1334 terminal blocks.
Caution When using matrix expansion cables, only connect terminal blocks of the
same type together. Connecting different types of terminal blocks can damage the
module or the equipment connected to the module. For example, you can connect
two or more SCXI-1334 terminal blocks; however, do not connect the SCXI-1334
with any other type of terminal block.
To expand the number of columns of a matrix, complete the following steps:
4| ni.com | NI SCXI-1334 Installation Guide
1. Connect one end of the matrix expansion cable to a row connection cable terminal in one
of the terminal blocks.
2. Connect the other end of the matrix expansion cable to a row connection cable terminal in
another terminal block.
The following figure shows how to use a matrix expansion cable with SCXI terminal
blocks to expand the number of columns of a 4×32 matrix, as an example. The matrix
expansion cable connects rows to expand the number of columns.
Figure 3. Expanding the Number of Columns with the Matrix Expansion Cable
4
32
4
32
4
64
32
1
Module 1 Matrix
Expansion
Cable
Module 2
NI SCXI-1378
NI SCXI-1378
1. SCXI Terminal Blocks
2. Matrix Expansion Cable
3. Row Connection Cable Terminals
The SCXI-1334 configures the SCXI-1129 as a 4×64 matrix. Connecting two SCXI-1334
terminal blocks as described above creates a 4×128 matrix.
Related Information
Installing the Terminal Block on page 6
Complete the following steps to connect the SCXI-1334 to the SCXI-1129 front panel.
NI SCXI-1334 Installation Guide | © National Instruments | 5
Installing the Terminal Block
Complete the following steps to connect the SCXI-1334 to the SCXI-1129 front panel.
Note Install the SCXI-1129 if you have not already done so. Refer to the NI
Switches Getting Started Guide for more information.
1. Plug the SCXI-1334 onto the front connector of the SCXI-1129.
2. Tighten the top and bottom thumbscrews on the terminal block rear panel to hold it
securely in place.
Figure 4. Installing the SCXI-1334 Terminal Block
NI SCXI-1378
NI SCXI-1378
4
1
3
2
1. Thumbscews
2. Front Connector
3. SCXI-1129
4. SCXI-1334
Related Information
Expanding the Number of Columns on page 4
The SCXI-1334 offers convenient methods for expanding the number of columns of a
matrix using two or more SCXI-1334 terminal blocks.
6| ni.com | NI SCXI-1334 Installation Guide
Expanding the Number of Rows
The SCXI-1334 offers convenient methods for expanding the number of rows of a matrix
using two or more SCXI-1334 terminal blocks.
Caution When using matrix expansion plugs, only connect terminal blocks of the
same type. Connecting different types of terminal blocks can damage the module or
the equipment connected to the module. For example, you can connect two or more
SCXI-1334 terminal blocks; however, do not connect the SCXI-1334 with any other
type of terminal block.
1. Connect a matrix expansion plug to the top or bottom column connectors of the two
terminal blocks.
2. Refer to the following figure for information about how to expand the number of rows.
The figure demonstrates how to expand the number of rows of a 4 x 32 matrix as an
example.
Figure 5. Expanding the Number of Rows with the Matrix Expansion Plug
4
32
4
32
8
32
3
1
2
3
Module 1
Matrix
Expansion
Plug
Module 2
NI SCXI-1378
NI SCXI-1378
1. Matrix Expansion Plug
2. Thumbscrews
3. Column Connectors
The SCXI-1334 configures the SCXI-1129 as a 4 x 64 matrix. Connecting the SCXI-1334
terminal blocks as described above creates an 8 x 64 matrix.
NI SCXI-1334 Installation Guide | © National Instruments | 7
Information is subject to change without notice. Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for
information on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their
respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your
software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents. You can find
information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer
to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how
to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS
TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S.
Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable
limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.
© 2001—2017 National Instruments. All rights reserved.
372788D-01 Mar17
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