National Instruments TB-2676 Bedienungsanleitung

INSTALLATION INSTRUCTIONS

NI TB-2676

Introduction

This guide describes how to install and connect signals to the

National Instruments TB-2676 terminal block. Use the ribbon cable

headers of the NI TB-2676 to access all channels of the NI PXI-2576

multiplexer for all configurations.

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

the NI TB-2676.

To set up and use the NI TB-2676 terminal block, make sure you have the

following items:

❑NI TB-2676 terminal block

❑NI PXI-2576 switch module

❑1/8 in. flathead screwdriver

❑#1 Phillips screwdriver

❑Eight 0.100 in. pitch 2 ×10 ribbon cable assemblies, or wire wrap

cable and tools

Connecting Signals

Caution Ensure that power has not been applied to signals prior to connection. Only

trained and qualified service personnel should install and connect signals.

To connect signals to the terminal block, refer to Figure 1 and complete the

following steps:

1. Remove the terminal block top cover screw.

2. Gently lift the top cover off the terminal block.

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NI TB-2676 Installation Instructions 2 ni.com

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

top strain-relief bar.

4. Connect the safety earth ground to a safety ground lug.

5. Connect the ribbon cables or wire wraps to the ribbon cable headers.

When connecting a signal, refer to the terminal reference diagram in

Figure 2.

6. Pull the cables through the strain-relief opening to remove the slack in

the wiring.

7. Replace the strain-relief bar and tighten the two screws on the

strain-relief assembly to secure the cables.

8. Replace the terminal block top cover.

9. Secure the terminal block top cover with the top cover screw.

Figure 1. NI TB-2676 Terminal Block

1 Terminal Block Top Cover

2 Top Cover Screw

3 Safety Ground Lug

4 Chassis Screws

5 Strain-Relief Screws

6 Strain-Relief Opening

7 Strain-Relief Bar

8 Ribbon Cable Headers

9 Rear Connector

©National Instruments Corporation 3 NI TB-2676 Installation Instructions

Figure 2. NI TB-2676 Terminal Reference Diagram

Table 1 shows the COM configurations for each topology.

Table 1. COM Configuration per Topology

Bank Octal 8 ×1Quad 16 ×1Dual 32 ×164 ×1

0–1 COM 0 COM 0 COM 0 COM 0

2–3 COM 2

4–5 COM 4 COM 4

6–7 COM 6

8–9 COM 8 COM 8 COM 8

10–11 COM 10

12–13 COM 12 COM 12

14–15 COM 14

NI TB-2676 Terminal Reference Guide

160 POSITION CONNECTOR

WARNING: IF HAZARDOUS VOLTAGE IS PRESENT, TERMINAL

BLOCK MUST BE SECURELY MOUNTED TO THE

PXI-2576 USING THE TWO CAPTIVE SCREWS.

MAX 100V CAT I

COM4

CH16

CH17

CH18

CH19

COM5

CH20

CH21

CH22

CH23

COM6

CH24

CH25

CH26

CH27

COM7

CH28

CH29

CH30

CH31

COM0

CH0

CH1

CH2

CH3

COM1

CH4

CH5

CH6

CH7

COM2

CH8

CH9

CH10

CH11

COM3

CH12

CH13

CH14

CH15

+ –

COM14

CH56

CH57

CH58

CH59

COM15

CH60

CH61

CH62

CH63

COM12

CH48

CH49

CH50

CH51

COM13

CH52

CH53

CH54

CH55

COM10

CH40

CH41

CH42

CH43

COM11

CH44

CH45

CH46

CH47

COM8

CH32

CH33

CH34

CH35

COM9

CH36

CH37

CH38

CH39

+ –

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, refer to the appropriate location:

Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.

Accessories

Visit ni.com for more information about the following accessory.

Specifications

This section lists additional specifications for the NI TB-2676 when used

with the NI PXI-2576. All specifications are subject to change without

notice. Visit ni.com/manuals for the most current specifications.

Input Characteristics

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

specified.

Maximum switching voltage

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

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

Caution When hazardous voltages (>42.4 Vpk/60 VDC) are present on any relay terminal,

all terminals must be considered hazardous. Ensure that external wiring or any circuits

connected to the device are properly insulated from human contact.

Table 2. Accessory for the NI TB-2676

Accessory Manufacturer Part Number

Set of eight 0.100 in. pitch 2 ×10 ribbon

cable assemblies, 36 in. long,

socket-to-socket.

National Instruments 779669-01

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