National Instruments NI TB-2635 User Manual
INSTALLATION INSTRUCTIONS
NI TB-2635
8x16, 2-Wire Terminal Block for the NI PXI-2529
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This guide describes how to install and connect signals to the National
Instruments TB-2635 terminal block. Refer to the NI Switches Getting
Started Guide to determine when to install the terminal block.
Introduction
The TB-2635 terminal block installs in front of the PXI-2529 switch
module and has screw terminals that provide access to all rows and
columns of the matrix. Connections for the trigger input and trigger output
signals also are available.
Caution This terminal block 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 V
low-voltage (≤42.4 V
/60 VDC) cannot be connected to any other screw terminal.
pk
/60 VDC) are present on any screw terminal, safety
pk
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.
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
The terminal block is shipped in an antistatic package to prevent
electrostatic discharge (ESD) that can damage several components on the
terminal block. To avoid such 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.
NI TB-2635 Installation Instructions 2 ni.com
2. Verify the Components
Make sure you have the following:
❑ TB-2635 terminal block
❑ PXI chassis
❑ PXI-2529 switch module
❑ 1/8 in. flathead screwdriver
❑ Wire cutter
❑ Wire insulation stripper
3. Connect Signals
To connect signals to the terminal block, complete the following steps
while referring to Figure 1.
1. Prepare the signal wire by stripping the insulation no more than
3/16 of an inch.
2. Remove the terminal block top cover screw with a flathead
screwdriver.
3. Gently lift the terminal block top cover off the terminal block.
4. Loosen the two screws on the strain-relief bar, leaving plenty of space
for the signal wires.
5. Pull the signal wires through the strain-relief opening shown in
Figure 1.
6. Connect the safety earth ground to the safety ground lug.
7. Connect the wires to the terminals by inserting the stripped end of the
wire into the terminal. Secure the connection by tightening the screw
for each terminal. When connecting the signals, refer to the connection
diagram in Figure 2.
8. Remove slack in the terminal block wiring by pulling them through the
strain-relief bar.
9. Tighten the two screws on the strain-relief bar until the signal wires are
secured.
10. Replace the terminal block top cover.
11. Secure the terminal block top cover with the top cover screw.
© National Instruments Corporation 3 NI TB-2635 Installation Instructions
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