National Instruments TB-2666 User manual

INSTALLATION INSTRUCTIONS
NI TB-2666
Terminal Block for the NI PXI-2566
This guide describes how to install and connect signals to the
National Instruments TB-2666 terminal block. Refer to the NI Switches
Getting Started Guide to determine when to install the terminal block.
Introduction
The TB-2666 terminal block installs in front of the PXI-2566 switch
module and has screw terminals that provide access to each of the 16 relays.
Connections for the trigger output and trigger input 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 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.
Conventions
The following conventions are used in this guide:
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.
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NI TB-2666 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.
1. Unpack the Terminal Block
The terminal block is shipped in an antistatic package to prevent
electrostatic discharge (ESD) that can damage several components in 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 on a switch terminal block.
Store the terminal block in the antistatic package when not in use.
2. Verify the Components
Make sure you have the following:
❑TB-2666 terminal block
❑PXI chassis
❑PXI-2566 switch module
❑1/8 inch flathead screwdriver
❑Wire cutter
❑Wire insulation stripper

©National Instruments Corporation 3 NI TB-2666 Installation Instructions
3. Connect Signals
To connect signals to the terminal block, complete the following steps:
1. Prepare the signal wire by stripping the insulation no more than 3/16
of an inch.
2. Remove the terminal block top cover screws with a flathead
screwdriver.
3. Gently lift the terminal block top cover off the terminal block.
4. Loosen the two 10-32 ×3/4 inch screws on the strain-relief bar, leaving
plenty of space for the signal cables.
5. Pull the signal cables at least one foot 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. Tighten the two 10-32 ×3/4 inch screws on the strain-relief bar, leaving
enough space for your signal wires.
9. Replace the terminal block top cover to the terminal block.
10. Secure the terminal block top cover with the top cover screws.

NI TB-2666 Installation Instructions 4 ni.com
Figure 1. TB-2666 Terminal Block
1 Signal Wires
2 Strain-Relief Opening
3 Strain-Relief Bar
4 10-32 ×3/4 Inch Screw
5 Chassis Screws
6 Rear Connector
7 Terminal Block Top Cover
8 Top Cover Screws
9 Safety Ground Lug
10 Screw Terminals
9
2
3
7
6
5
4
1
8
10

©National Instruments Corporation 5 NI TB-2666 Installation Instructions
Figure 2. TB-2666 Terminal Block Signal Connections
62 POSITION DSUB CONNECTOR
CABLE
USE
SHIELDED
5.5 V MAX3.3 V TRIGGERING
CH 3
150 VDC / 125 VRMS MAX
150 VDC / 125 VRMS MAX
GND
IN
GND
OUT
CH 2 CH 1 CH 0
CH 7
NO COM NC
CH 6
NO COM NC
CH 5
NO COM NC
CH 4
NO COM NC
NO COM NC NO COM NC NO COM NC NO COM NC
CH 12
NC COM NO
CH 13
NC COM NO
CH 14
NC COM NO
CH 15
NC COM NO
CH 11
NC COM NO
CH 8
NC COM NO
CH 9
NC COM NO
CH 10
NC COM NO
NI PXI-2666 Screw Terminal Reference

NI TB-2666 Installation Instructions 6 ni.com
4. Install the Terminal Block
To connect the TB-2666 terminal block to the PXI-2566 front panel,
complete the following steps:
1. Connect the PXI-2566 front connector to its mating connector on the
terminal block.
2. Tighten the top and bottom chassis screws on the back of the terminal
block rear panel to hold it securely in place.
Figure 3. Installing the TB-2666 Terminal Block
1 Chassis Screw
2 PXI-2566
3 Front Connector
4 TB-2666
1
2
3
4

©National Instruments Corporation 7 NI TB-2666 Installation Instructions
Compliance and Certifications
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.
Electromagnetic Compatibility
Emissions ............................................... EN 55011 Class A at 10 m
FCC Part 15A above 1 GHz
Immunity................................................ EN 61326:1997 + A2:2001,
Table 1
EMC/EMI............................................... CE, C-Tick and FCC Part 15
(Class A) Compliant
Note For EMC compliance, you must 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, click Declarations
of Conformity Information at ni.com/certification.

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