National Instruments SCXI-1332 User manual

INSTALLATION INSTRUCTIONS
NI SCXI -1332
Terminal Block for the NI SCXI-1127/1128
This guide describes how to install and connect signals to the
National Instruments SCXI-1332 terminal block to configure the
SCXI-1127/1128 switch module as a 4 ×8, 2-wire matrix.
Screw terminals on the SCXI-1332 allow you to access the 4 ×8 matrix.
The SCXI-1332 also contains terminals for connecting rows and columns
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.
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NI SCXI-1332 Installation Instructions 2 ni.com
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
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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-1332 in the antistatic envelope when not in use.
2. Verify the Components
Make sure that you have the following items:
❑SCXI-1332 terminal block
❑SCXI chassis
❑SCXI-1127 or SCXI-1128 switch module
❑1/8 in. flathead screwdriver
❑Numbers 1 and 2 Phillips screwdrivers
❑Long-nose pliers
❑Wire cutter

©National Instruments Corporation 3 NI SCXI-1332 Installation Instructions
❑Wire insulation stripper
❑Matrix expansion cables—one cable needed to expand the number of
columns, two cables needed to expand the number of rows
3. Connect Signals
To connect the signal(s) 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
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-1332 Installation Instructions 4 ni.com
Figure 1. SCXI-1332 Top Cover Diagram
1 Top Cover Screw 2 Top Cover
2
1

©National Instruments Corporation 5 NI SCXI-1332 Installation Instructions
Figure 2. SCXI-1332 Parts Locator Diagram
4. Expand the Number of Columns
The SCXI-1332 offers convenient methods for expanding the number of
columns of a matrix using two or more SCXI-1332 terminal blocks. If you
are not expanding the number of columns of the matrix, skip to the 6. Install
the Terminal Block step. For more information about expanding matrices,
refer to the NI Switches Help.
1 Column Connectors
2 Thumbscrew
3 Row Connectors
4 Rear Connector
5 Row Screw Terminals
6 Column Screw Terminals
7 Strain-Relief Bar
8 Strain-Relief Screw
9 Safety Ground Lug
COLUMN CONNECTION
ROW CONNECTION
ROW CONNECTION
SCXI-1332 TB
COLUMN CONNECTION
9
7
5
63
1
1
2
2
4
8

NI SCXI-1332 Installation Instructions 6 ni.com
Figure 3 shows how to use a matrix expansion cable with SCXI-1332
terminal blocks to expand the number of columns of a 4 ×8 matrix. 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 connector in
one of the terminal blocks.
2. Connect the other end of the matrix expansion cable to a row connector
in another terminal block.
Figure 3. Expanding the Number of Columns with the Matrix Expansion Cable
The SCXI-1332 configures the SCXI-1127/1128 as a 4 ×8 matrix.
Connecting the SCXI-1332 terminal blocks as described above creates
a4×16 matrix.
1 SCXI-1332 Terminal Block 2 Row Connectors 3 Matrix Expansion Cable
4
8
4
8
4
16
Module 1 Matrix
Expansion
Cable
Module 2
1
2 2
3

©National Instruments Corporation 7 NI SCXI-1332 Installation Instructions
5. Expand the Number of Rows
The SCXI-1332 offers convenient methods for expanding the number of
rows of a matrix using two or more SCXI-1332 terminal blocks.
Figure 4 shows how to use two matrix expansion cables with SCXI-1332
terminal blocks to expand the number of rows of a 4 ×8 matrix. The matrix
expansion cable connects columns to expand the number of rows. To
expand the number of rows of a matrix, complete the following steps:
1. Connect one end of a matrix expansion cable to a column connector in
one of the terminal blocks.
2. Connect one end of a second matrix expansion cable to another column
connector in the same terminal block.
3. Connect the other end of each matrix expansion cable to two column
connectors in another terminal block.
Figure 4. Expanding the Number of Rows with Matrix Expansion Cables
The SCXI-1332 configures the SCXI-1127/1128 as a 4 ×8 matrix.
Connecting the SCXI-1332 terminal blocks as described above creates
an8×8 matrix.
1 SCXI-1332 Terminal Blocks 2 Column Connection Cable Terminal 3 Matrix Expansion Cables
4
8
8
8
Module 1
Matrix
Expansion
Plug
Module 2
4
8
1
2 2
3

NI SCXI-1332 Installation Instructions 8 ni.com
6. Install the Terminal Block
To connect the SCXI-1332 to the SCXI-1127/1128 front connector,
complete the following steps:
1. Plug the SCXI-1332 onto the front connector on the SCXI-1127/1128.
2. Tighten the top and bottom thumbscrews on the terminal block rear
panel to hold it securely in place.
Figure 5. Installing the SCXI-1332 Terminal Block
1 SCXI-1332 Thumbscrew
2 SCXI-1127/1128 Thumbscrews
3 Front Connector
4 SCXI-1127/1128
5 SCXI-1332
2
1
3
4
5

©National Instruments Corporation 9 NI SCXI-1332 Installation Instructions
Specifications
Maximum Voltage
Channel-to-ground ................................. 300 V, CAT II
Caution This module is rated for Measurement Category II and intended to carry signal
voltages no greater than 300 V. This module features 1390 Vrms isolation between input
signals and the chassis as verified by a dielectric withstand test, 1 minute maximum. Do not
use this module for connection to signals or for measurements within Categories III or IV.
Refer to the Read Me First: Safety and Radio-Frequency Interference document for more
information about measurement categories.
Maximum Current
Maximum current
(per channel) .......................................... 2 ADC, 2 AAC
Environment
The NI SCXI-1332 is intended for indoor use only.
Operating temperature............................ 0 °C to 50 °C
Storage temperature ............................... –20 °C to 70 °C
Relative humidity................................... 10% to 90% RH, noncondensing
Pollution Degree .................................... 2
Approved at altitudes up to 2,000 m.
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 61010-1
• CAN/CSA-C22.2 No. 61010-1
Note For UL and other safety certifications, refer to the product label or visit
ni.com/certification, search by model or product line, and click the appropriate link
in the Certification column.

NI SCXI-1332 Installation Instructions 10 ni.com
Electromagnetic Compatibility
Emissions................................................EN 55011 Class A at 10 m
FCC Part 15A above 1 GHz
Immunity ................................................EN 61326:1997 + A2:2001,
Table 1
CE, C-Tick, and FCC Part 15 (Class A) Compliant
Note For EMC compliance, operate this device with shielded cabling.
CE Compliance
This product meets the essential requirements of applicable European
Directives, as amended for CE marking, as follows:
Low-Voltage Directive (safety)..............73/23/EEC
Electromagnetic Compatibility
Directive (EMC) .....................................89/336/EEC
Note Refer to the Declaration of Conformity (DoC) for this product for any additional
regulatory compliance information. To obtain the DoC for this product, visit
ni.com/certification, search by model number or product line, and click the
appropriate link in the Certification column.

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