National Instruments TB-2725 User manual

National Instruments TB-2725 Manual
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INSTALLATION GUIDE
TB-2725 Terminal Block
This guide describes how to install and use the National Instruments
TB-2725 terminal block with the NI PXI-4224 modules. The TB-2725 has
16 screw terminals for easy connection of up to eight pairs of input signals,
and one SMB connector for external triggering.
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 Options»Settings»General directs you to
pull down the Options menu, select the Settings item, and select General
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 icon is marked on the
product, refer to the Read Me First: Safety and Electromagnetic
Compatibility document, shipped with the product, for precautions to take.
When this symbol is marked on a product, it denotes a warning advising
you to take precautions to avoid electrical shock.
When this symbol is marked on a product, it denotes a component that may
be hot. Touching this component may result in bodily injury.
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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TB-2725 Terminal Block Installation Guide 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.
What You Need to Get Started
To set up and use the TB-2725 terminal block, you need the following
items:
❑Hardware
– TB-2725 terminal block
– NI PXI-4224 module
– PXI or PXI/SCXI combination chassis
– Shielded cabling and sensors as required for your application
❑Documentation
–TB-2725 Terminal Block Installation Guide
– Read Me First: Safety and Electromagnetic Compatibility
– DAQ Getting Started guides
– SCXI Quick Start Guide
– NI PXI-4224 User Manual
– PXI or PXI/SCXI combination chassis user manual
Note You can download needed documents from ni.com/manuals.
❑Tools
– Number 1 and 2 Phillips screwdriver
– 1/8 in. flathead screwdriver
– Long-nose pliers
– Wire cutter
– Wire insulation stripper

©National Instruments 3 TB-2725 Terminal Block Installation Guide
Connecting the Signals
Caution To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Note Refer to the Read Me First: Safety and Electromagnetic Compatibility document
before removing equipment covers or connecting or disconnecting any signal wires.
To connect signals to the TB-2725 terminal block, refer to Figure 1 while
performing the following steps:
1. Unscrew the top-cover screw, and remove the top cover.
2. Loosen the strain-relief screws, and remove the strain-relief bar.
3. Prepare the signal wire (16 AWG to 26 AWG) of the shielded cable by
stripping the insulation no more than 6.0 mm (0.24 in.).
4. Run the shielded cable through the strain-relief opening. If necessary,
add insulation or padding.
5. Insert the stripped ends of the signal wires into the terminals. Make
sure no bare wire extends from the terminal.
6. Connect the cable shield to the earth-ground lug.
7. Tighten the screws to a torque of 0.5 N · m to 0.6 N · m
(4.4 lb · in. to 5.3 lb · in.).
8. Reinstall the strain-relief bar, and tighten the strain-relief screws.
9. Reinstall the top cover, and tighten the top-cover screws.
10. Refer to the SCXI Quick Start Guide for TB-2725 installation
instructions.

TB-2725 Terminal Block Installation Guide 4 ni.com
Figure 1. TB-2725 Parts Locator Diagram
1 Chassis Screws
2 Strain-Relief Opening
3 Strain-Relief Bar
4 Signal Cables
5 Strain-Relief Screw
6 Top Cover
7 Top-Cover Screw
8 Rear Connector
9 Earth-Ground Lug
10 Screw Terminals
123456789 10 11 12 1314 15 16
7
6
8
10
5
1
1
42
3
9
60VDC
CATI

©National Instruments 5 TB-2725 Terminal Block Installation Guide
Specifications
All specifications are typical at 25 °C unless otherwise specified.
Electrical
Coupling................................................. DC1
Terminal-wire size ................................. 16 AWG to 26 AWG
Field-wiring connectors
Number of screw terminals............. 16
Earth-ground lugs ........................... 1
Strain relief ..................................... Strain relief at
terminal-block entrance
Mechanical
Dimensions............................................. 10.4 cm ×8.9 cm ×1.8 cm
(4.1 in. ×3.5 in. ×0.7 in.)
Weight.................................................... 285 g (10 oz)
Maximum Working Voltage
Maximum working voltage refers to the signal voltage plus the
common-mode voltage.
Channel-to-earth..................................... 42.4 Vpeak, 60 VDC,
Measurement Category I
Channel-to-channel ................................ 42.4 Vpeak, 60 VDC,
Measurement Category I
Caution Do not use the TB-2725 for connections to signals or for measurements within
Categories II, III, or IV.
Caution The protection provided by the TB-2725 can be impaired if it is used in a manner
not described in this document.
1 In instrumentation terminology, DC coupling means that both DC and AC signals are passed.

TB-2725 Terminal Block Installation Guide 6 ni.com
Environmental
Operating temperature ............................0 °C to 50 °C
Storage temperature ................................–20 °C to 70 °C
Humidity.................................................10% to 90% RH, noncondensing
Maximum altitude...................................2,000 meters
Pollution Degree .....................................2
Indoor use only
Safety Standards
This product meets 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, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online
Product Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for
electrical equipment for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• AS/NZS CISPR 11: Group 1, Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Note In the United States (per FCC 47 CFR), Class A equipment is intended for use
in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada,
Australia and New Zealand (per CISPR 11) Class A equipment is intended for use only in
heavy-industrial locations.
Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical
equipment that does not intentionally generates radio frequency energy for the treatment
of material or inspection/analysis purposes.
Note For EMC declarations and certifications, and additional information, refer to the
Online Product Certification section.

©National Instruments 7 TB-2725 Terminal Block Installation Guide
CE Compliance
This product meets the essential requirements of applicable European
Directives as follows:
• 2006/95/EC; Low-Voltage Directive (safety)
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional
regulatory compliance information. To obtain product certifications and
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.
Environmental Management
NI is committed to designing and manufacturing products in an
environmentally responsible manner. NI recognizes that eliminating
certain hazardous substances from our products is beneficial to the
environment and to NI customers.
For additional environmental information, refer to the NI and the
Environment Web page at ni.com/environment. This page contains the
environmental regulations and directives with which NI complies, as well
as other environmental information not included in this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of the product life cycle, all products must be sent to a WEEE
recycling center. For more information about WEEE recycling centers, National
Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on
Waste and Electronic Equipment, visit ni.com/environment/
weee.
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Where to Go for Support
The National Instruments Web site is your complete resource for technical
support. At ni.com/support you have access to everything from
troubleshooting and application development self-help resources to email
and phone assistance from NI Application Engineers.
National Instruments corporate headquarters is located at
11500 North Mopac Expressway, Austin, Texas, 78759-3504.
National Instruments also has offices located around the world to help
address your support needs. For telephone support in the United States,
create your service request at ni.com/support and follow the calling
instructions or dial 512 795 8248. For telephone support outside the United
States, visit the Worldwide Offices section of ni.com/niglobal to access
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support phone numbers, email addresses, and current events.