National Instruments TB-2643 User manual

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
8
11
10
6
7
4
351
2
9

©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
J4
3+
2+
1+
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+
J2
J3
J2
J3
3–
3+
2–
2+
1–
1+
0–
0+ (Pin 1)
J3
3+
2+
1+
0+ (Pin 1)
3–
2–
1–
0–
4 x 64 2-WIRE
J4
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
J2
J3
J2
J3
J3
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

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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