NI SCXI -1334 User manual
INSTALLATION INSTRUCTIONS
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. Visit ni.com/switches for information on other
switching solutions.
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 this symbol is marked on
a product, refer to the Read Me First: Safety and Radio-Frequency
Interference document for information about precautions to take.
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.
™
NI SCXI-1334 Installation Instructions 2 ni.com
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, and code excerpts.
1. Unpack the Terminal Block
To avoid damage in handling 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 your computer chassis
before removing 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 into your system.
Store the SCXI-1334 in the antistatic envelope when not in use.
2. Verify the Components
Make sure that you have the following items:
❑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
©National Instruments Corporation 3 NI SCXI-1334 Installation Instructions
❑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)
3. Connect Signals
To connect the signal(s) to the terminal block, refer to Figures 1 and 2
while completing the following steps:
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.
NI SCXI-1334 Installation Instructions 4 ni.com
Figure 1. SCXI-1334 Top Cover Diagram
1 Top Cover 2 Top Cover Screw
1
2
©National Instruments Corporation 5 NI SCXI-1334 Installation Instructions
Figure 2. SCXI-1334 Parts Locator Diagram
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
1
8
2
1
7
2
2
6
6
3
4
5
NI SCXI-1334 Installation Instructions 6 ni.com
4. Expand 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.
If you are not expanding the number of columns of the matrix, skip to the
5. Install the Terminal Block step. For more information about expanding
matrices, refer to the NI Switches Help.
Figure 3 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. To expand the number of columns of a matrix, complete the
following steps:
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.
©National Instruments Corporation 7 NI SCXI-1334 Installation Instructions
Figure 3. Expanding the Number of Columns with the Matrix Expansion Cable
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.
1 SCXI Terminal Blocks 2 Matrix Expansion Cable 3 Row Connection Cable Terminals
4
32
4
32
4
64
32
1
Module 1 Matrix
Expansion
Cable
Module 2
NI SCXI-1334 Installation Instructions 8 ni.com
5. Install the Terminal Block
To connect the SCXI-1334 to the SCXI-1129 front panel, refer to Figure 4
and complete the following steps:
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
1Thumbscrews 2 Front Connector 3 SCXI-1129 4 SCXI-1334
4
1
3
2
©National Instruments Corporation 9 NI SCXI-1334 Installation Instructions
6. Expand 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.
Figure 5 shows how to use a matrix expansion plug with SCXI terminal
blocks to expand the number of rows of a 4 ×32 matrix, as an example.
The matrix expansion plug connects columns to expand the number of
rows. To expand the number of rows of a matrix, connect a matrix
expansion plug to the top or bottom column connectors of the two terminal
blocks.
Figure 5. Expanding the Number of Rows with the Matrix Expansion Plug
The SCXI-1334 configures the SCXI-1129 as a 4 ×64 matrix. Connecting
the SCXI-1334 terminal blocks as described above creates an 8 ×64 matrix.
1 Matrix Expansion Plug 2 Thumbscrews 3 Column Connectors
4
32
4
32
8
32
3
1
2
3
Module 1
Matrix
Expansion
Plug
Module 2
NI SCXI-1334 Installation Instructions 10 ni.com
Specifications
Maximum Working Voltage
Maximum working voltage refers to the signal voltage plus the
common-mode voltage.
Channel-to-earth .....................................150 V, Installation Category I
Channel-to-channel.................................150 V
Maximum Current
Maximum current
(per channel) ...........................................2 ADC, 2 AAC
Environmental
Operating temperature ............................0 to 50 °C
Storage temperature................................–20 to 70 °C
Humidity.................................................10 to 90% RH, noncondensing
Pollution Degree .....................................2
Approved at altitudes up to 2,000 m
Indoor use only
Safety
This product is designed to meet the requirements of the following
standards of safety for electrical equipment for measurement, control,
and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 3111-1, UL 61010B-1
• CAN/CSA C22.2 No. 1010.1
Note For UL and other safety certifications, refer to the product label, or visit ni.com/
hardref.nsf, search by model number or product line, and click the appropriate link in
the Certification column.
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