National Instruments TB-2676 User manual

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
4
4
8
2
3
1
5
5
7
6
9

©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
J1
+ –
J2
+ –
J3
+ –
J4
+ –
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
J6
+ –
J7
+ –
J8
+ –
J9
+ –

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© 2006–2007 National Instruments Corporation. All rights reserved. 374311B Dec07
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