National Instruments TB-2643 Manuale utente

INSTALLATION INSTRUCTIONS

NI TB-2643

4 × 64 2-Wire or Dual 4 × 64 1-Wire Matrix Terminal Block

for the NI PXI-2532

Introduction

The NI TB-2643 terminal block configures your NI PXI-2532 as a 4 ×64

2-wire matrix or dual 4 × 64 1-wire matrix. The NI TB-2643 has ribbon

cable headers to connect signals to the switch, and it provides optional

isolation resistors to protect the reed relays from capacitive loads.

Refer to the NI Switches Getting Started Guide to determine when to install

the terminal block.

Make sure you have the following:

• NI TB-2643 terminal block

• 1/8 in. flathead and #1 Phillips screwdrivers

• Eight 2 mm jumpers

• Four 34 conductor, 28 AWG, .050 in. pitch ribbon cable assemblies

(not included)

• One 16 conductor, 28 AWG, .050 in. pitch ribbon cable assembly

(not included)

Note Refer to the Accessories section for information about ordering the appropriate cable

assemblies.

Connecting Ribbon Cables

To connect ribbon cables to the terminal block, refer to Figures 1 and 2

while completing the following steps:

1. Remove the top cover screw.

2. Gently remove the top cover from the terminal block.

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NI TB-2643 Installation Instructions 2 ni.com

3. Loosen the two screws on the strain-relief assembly and remove the

strain-relief bar.

4. Remove the two screws from the upper and lower column connection

boards.

5. Disconnect the column connection boards from the module interface

board by sliding them toward the front of the terminal block housing.

6. Connect each ribbon cable to the appropriate headers on the column

connection boards and the module interface board.

7. Reassemble the terminal block.

Note For information about protection resistance and matrix expansion, refer to the

NI Switches Help.

Figure 1. NI TB-2643 Terminal Block

1 Top Cover Screw

2 Top Cover

3 Strain-relief Screws

4 Strain-relief Bar

5 Column Connection Board Screws

6 Lower Column Connection Board

7 Upper Column Connection Board

8 Module Interface Board

9 Column Headers

10 Row Headers

11 Housing

351

©National Instruments Corporation 3 NI TB-2643 Installation Instructions

Figure 2. NI TB-2643 Terminal Block Signal Connections

Accessories

Note For information about using shielded cabling, refer to the NI PXI-2532 Declaration

of Conformity (DoC). To obtain the DoC, visit ni.com/certification, search by

model number or product line, and click the appropriate link in the Certification column.

Table 1. Accessories for the NI TB-2643

Accessory Manufacturer Part Number

NI SCB-264X screw terminal block National Instruments 779341-01

Row and column cable kit for the

NI SCB-264X terminal blocks

National Instruments 779346-01

Row connection cable for column expansion National Instruments 779325-01

16 Conductor, .05 in. pitch ribbon cable

assemblies

Samtec FFSD-08-01-N

34 Conductor, .05 in. pitch ribbon cable

assemblies

Samtec FFSD-17-01-N

0+ (Pin 1)

3–

2–

1–

0–

LOWER COLUMN

CONNECTION BOARD

C16–

C16+

C0–

C0+

C15–

C15+

UPPER COLUMN

CONNECTION BOARD

C31–

C31+

C47+

C47–

C63–

C48+

C48–

C32+

C32–

C63+

3–

2–

1–

0–

0+ (Pin 1)

3–

2–

1–

0–

4 x 64 2-WIRE

B0R3

B0R2

B0R1

B0R0 (Pin 1)

B1R3

B1R2

B1R1

B1R0

LOWER COLUMN

CONNECTION BOARD

B1C16

B0C16

B1C0

B0C0

B1C15

B0C15

UPPER COLUMN

CONNECTION BOARD

B1C31

B0C31

B0C47

B1C47

B1C63

B0C48

B1C48

B0C32

B1C32

B0C63

B0R3

B0R2

B0R1

B0R0 (Pin 1)

B1R3

B1R2

B1R1

B1R0

DUAL 4 x 64 1-WIRE

ROW

PROTECTION BYPASS

ROW

HEADERS

B1R3

B0R3

B1R2

B0R2

B1R1

B0R1

B1R0

B0R0 (Pin 1)

ROW

PROTECTION BYPASS

ROW

HEADERS

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on

ni.com/legal for more information about National Instruments trademarks. Other product and company names mentioned herein are

trademarks or trade names of their respective companies. For patents covering National Instruments products/technology, refer to the appropriate

location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents.

Specifications

This section lists additional specifications for the NI TB-2643 used with the

NI PXI-2532. All specifications are subject to change without notice. Visit

ni.com/manuals for the most current specifications.

Input Characteristics

All input characteristics are DC, ACpk, or a combination unless otherwise

specified.

Maximum switching voltage

Channel-to-channel..........................100 V

Channel-to-ground...........................100 V, CAT I

Caution This module is rated for Measurement Category I and intended to carry signal

voltages no greater than 100 V. This module can withstand up to 500 V impulse voltage.

Do not use this module for connections 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 Read Me First: Safety and Electromagnetic

Compatibility document 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.

Maximum current (per channel) .............0.5 A

DC path resistance ..................................<1.5 Ω

Row and column protection

resistors (when used) .............................100 Ω

Bandwidth (–3 dB, 50 Ωtermination)

Typical.............................................≥11 MHz

Crosstalk (50 Ωtermination)

Channel-to-channel

10 kHz ......................................< –75 dB

100 kHz ....................................< –60 dB

1 MHz.......................................< –40 dB

Indice

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