National Instruments SCXI-1378 User manual

INSTALLATION INSTRUCTIONS
NI SCXI -1378
Terminal Block for the NI SCXI-1130
This guide describes how to install and connect signals to the
National Instruments SCXI-1378 terminal block to configure
the SCXI-1130 as a:
• 4x64, 1-wire matrix
• 4x32, 2-wire matrix
The SCXI-1378 terminal block installs in front of the SCXI-1130 switch
module. The SCXI-1378 has screw terminals available to connect signals
and trigger input and trigger output signals to the terminal block.
Refer to the NI Switches Getting Started Guide to determine when to install
the terminal block.
Conventions
The following conventions are used in this guide:
»The »symbol leads you through nested menu items and dialog box options
to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.
This icon denotes a tip, which alerts you to advisory information.
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 SCXI-1378 Installation Instructions 2 ni.com
bold Bold text denotes items that you must select or click in the software, such
as menu items and dialog box options. Bold text also denotes parameter
names.
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.
monospace Text in this font denotes text or characters that you should enter from the
keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames and extensions, and code excerpts.
1. Unpack the Terminal Block
To avoid 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 onto a switch module.
Store the terminal block in the antistatic package when not in use.
2. Verify the Components
Make sure that you have the following items:
❑SCXI-1378 terminal block
❑SCXI chassis
❑SCXI-1130 switch module
❑1/8 inch flathead screwdriver
❑Phillips screwdriver

©National Instruments Corporation 3 NI SCXI-1378 Installation Instructions
❑Wire cutter
❑Wire insulation stripper
❑Matrix expansion cable (to expand the columns of a matrix)
❑Matrix expansion plug (to expand the rows of a matrix)
Tip NI recommends using 28 AWG wire (ribbon or discrete) for use with the SCXI-1378
terminal block.
3. Connect Signals
To connect signals to the terminal block, refer to Figures 1 and 2 while
completing the following steps:
1. Prepare the signal wire by stripping the insulation no more than 7 mm.
2. Remove the top cover screw.
3. Unsnap and remove the top cover.
4. Loosen the two strain-relief screws on the strain-relief assembly.
5. Run the signal wires through the strain-relief opening.
6. Insert the stripped end of the wire fully into the terminal. Secure the
wire by tightening the screw of the terminal. No bare wire should
extend past the spring terminal. Exposed wire increases the risk of
a short-circuit causing a failure.
Note When connecting wires to the SCXI-1378, refer to Tables 1 and 2 to determine
terminal mapping for the chosen topology.
7. Tighten the two screws on the strain-relief assembly to secure the
cables.
8. Reinstall the top cover.
9. Replace the top cover screw.

NI SCXI-1378 Installation Instructions 4 ni.com
Figure 1. SCXI-1378 Terminal Block
1 Terminal Block Top Cover
2 Signal Wires
3 Safety Ground Lug
4 Screw Terminals
5 Column Connector
6 Rear Connectors
7 Top Cover Screw
8 Thumbscrew
9 Column Connector
10 Strain-Relief Screw
11 Strain-Relief Bar
12 Strain-Relief Opening
13 Row Connector
1
7
5
4
3
12
11
10
9
8
13
2
6

©National Instruments Corporation 5 NI SCXI-1378 Installation Instructions
Figure 2. SCXI-1378 Terminal Block Signal Connections
USE SHIELDED CABLE
5V MAX
TRIGOUT
GND
TRIGIN
GND
NI SCXI-1378 Terminal Reference Guide
COLUMN
4 X 64 1-Wire Matrix 4 X 32 2-Wire Matrix
128 POSITION ROW EXPANSION CONNECTOR
176 POSITION CONNECTOR 176 POSITION CONNECTOR
128 POSITION ROW EXPANSION CONNECTOR
COLUMN
1-Wire 2-Wire
COLUMN
1-Wire 2-Wire
0
C0
C0+
1
C1
C1+
2
C2
C2+
3
C3
C3+
4
C4
C4+
5
C5
C5+
6
C6
C6+
7
C7
C7+
8
C8
C8+
9
C9
C9+
10
C10
C10+
11
C11
C11+
12
C12
C12+
13
C13
C13+
14
C14
C14+
15
C15
C15+
32
C32
C16+
33
C33
C17+
34
C34
C18+
35
C35
C19+
36
C36
C20+
37
C37
C21+
38
C38
C22+
39
C39
C23+
40
C40
C24+
41
C41
C25+
42
C42
C26+
43
C43
C27+
44
C44
C28+
45
C45
C29+
46
C46
C30+
47
C47
C31+
1-Wire 2-Wire
COLUMN
48
C48
C16-
49
C49
C17-
50
C50
C18-
51
C51
C19-
52
C52
C20-
53
C53
C21-
54
C54
C22-
55
C55
C23-
56
C56
C24-
57
C57
C25-
58
C58
C26-
59
C59
C27-
60
C60
C28-
61
C61
C29-
62
C62
C30-
63
C63
C31-
1-Wire 2-Wire
0
R0
R0+
1 Wire 2 Wire
ROW
1
R0-
2
R1
R1+
3
R1-
4
R2
R2+
5
R2-
6
R3
R3+
7
R3-
COLUMN
EXPANSION
CONNECTOR
COLUMN
EXPANSION
CONNECTOR
16
C16
C0-
17
C17
C1-
18
C18
C2-
19
C19
C3-
20
C20
C4-
21
C21
C5-
22
C22
C6-
23
C23
C7-
24
C24
C8-
25
C25
C9-
26
C26
C10-
27
C27
C11-
28
C28
C12-
29
C29
C13-
30
C30
C14-
31
C31
C15-

NI SCXI-1378 Installation Instructions 6 ni.com
Table 1. 4x64, 1-Wire Matrix Topology Mapping
Software Hardware Software Hardware Software Hardware
r0 ROW 0 c19 COLUMN 19 c42 COLUMN 42
r1 ROW 2 c20 COLUMN 20 c43 COLUMN 43
r2 ROW 4 c21 COLUMN 21 c44 COLUMN 44
r3 ROW 6 c22 COLUMN 22 c45 COLUMN 45
c0 COLUMN 0 c23 COLUMN 23 c46 COLUMN 46
c1 COLUMN 1 c24 COLUMN 24 c47 COLUMN 47
c2 COLUMN 2 c25 COLUMN 25 c48 COLUMN 48
c3 COLUMN 3 c26 COLUMN 26 c49 COLUMN 49
c4 COLUMN 4 c27 COLUMN 27 c50 COLUMN 50
c5 COLUMN 5 c28 COLUMN 28 c51 COLUMN 51
c6 COLUMN 6 c29 COLUMN 29 c52 COLUMN 52
c7 COLUMN 7 c30 COLUMN 30 c53 COLUMN 53
c8 COLUMN 8 c31 COLUMN 31 c54 COLUMN 54
c9 COLUMN 9 c32 COLUMN 32 c55 COLUMN 55
c10 COLUMN 10 c33 COLUMN 33 c56 COLUMN 56
c11 COLUMN 11 c34 COLUMN 34 c57 COLUMN 57
c12 COLUMN 12 c35 COLUMN 35 c58 COLUMN 58
c13 COLUMN 13 c36 COLUMN 36 c59 COLUMN 59
c14 COLUMN 14 c37 COLUMN 37 c60 COLUMN 60
c15 COLUMN 15 c38 COLUMN 38 c61 COLUMN 61
c16 COLUMN 16 c39 COLUMN 39 c62 COLUMN 62
c17 COLUMN 17 c40 COLUMN 40 c63 COLUMN 63
c18 COLUMN 18 c41 COLUMN 41

©National Instruments Corporation 7 NI SCXI-1378 Installation Instructions
4. Expanding Rows & Columns
The SCXI-1378 terminal blocks offers convenient methods for expanding
the rows and/or columns of a matrix using two or more SCXI-1378
terminal blocks. If you are not expanding the rows or columns of the
matrix, skip to the Install the Terminal Block section. For more information
about expanding matrices, refer to the NI Switches Help.
Table 2. 4x32, 2-Wire Matrix Topology Mapping
Software
Hardware
Software
Hardware
+ – + –
r0 ROW 0 ROW 1 c14 COLUMN 14 COLUMN 30
r1 ROW 2 ROW 3 c15 COLUMN 15 COLUMN 31
r2 ROW 4 ROW 5 c16 COLUMN 32 COLUMN 48
r3 ROW 6 ROW 7 c17 COLUMN 33 COLUMN 49
c0 COLUMN 0 COLUMN 16 c18 COLUMN 34 COLUMN 50
c1 COLUMN 1 COLUMN 17 c19 COLUMN 35 COLUMN 51
c2 COLUMN 2 COLUMN 18 c20 COLUMN 36 COLUMN 52
c3 COLUMN 3 COLUMN 19 c21 COLUMN 37 COLUMN 53
c4 COLUMN 4 COLUMN 20 c22 COLUMN 38 COLUMN 54
c5 COLUMN 5 COLUMN 21 c23 COLUMN 39 COLUMN 55
c6 COLUMN 6 COLUMN 22 c24 COLUMN 40 COLUMN 56
c7 COLUMN 7 COLUMN 23 c25 COLUMN 41 COLUMN 57
c8 COLUMN 8 COLUMN 24 c26 COLUMN 42 COLUMN 58
c9 COLUMN 9 COLUMN 25 c27 COLUMN 43 COLUMN 59
c10 COLUMN 10 COLUMN 26 c28 COLUMN 44 COLUMN 60
c11 COLUMN 11 COLUMN 27 c29 COLUMN 45 COLUMN 61
c12 COLUMN 12 COLUMN 28 c30 COLUMN 46 COLUMN 62
c13 COLUMN 13 COLUMN 29 c31 COLUMN 47 COLUMN 63

NI SCXI-1378 Installation Instructions 8 ni.com
Row Expansion
Figure 3 shows how to expand the rows of a 4x32 matrix using a matrix
expansion plug. The matrix expansion plug connects columns to expand
the rows. To expand the rows of a matrix, complete the following steps:
1. Connect two SCXI-1378 terminal blocks to the front connectors of
two adjacent SCXI-1130 modules.
2. Tighten the top and bottom chassis screws on the back of the terminal
block rear panels to hold them securely in place.
3. Connect a matrix expansion plug to the top or bottom column
connectors of the two SCXI-1378 terminal blocks.
Figure 3. Row Expansion with the SCXI-1378
1 Matrix Expansion Plug 2 Thumbscrews 3 Column Connector
4
32
4
32
8
32
3
1
2
3
Module 1
Matrix
Expansion
Plug
Module 2

©National Instruments Corporation 9 NI SCXI-1378 Installation Instructions
Column Expansion
Figure 4 shows how to expand the columns of a 4x32 matrix using a matrix
expansion cable. The matrix expansion cable connects rows to expand the
columns. To expand the columns of a matrix, complete the following steps:
1. Connect one end of the matrix expansion cable to one of the ROW
CONNECTION CABLE terminals in one of the SCXI-1378 terminal
blocks.
2. Connect the other end of the matrix expansion cable to one of the ROW
CONNECTION CABLE terminals in another SCXI-1378.
3. Connect the two SCXI-1378 terminal blocks to the front connectors of
the two SCXI-1130 modules.
4. Tighten the top and bottom chassis screws on the back of the terminal
block rear panels to hold them securely in place.
Figure 4. Column Expansion with the SCXI-1378
1 SCXI-1378 2 Matrix Expansion Cable 3Row Connection Cable Terminals
4
32
4
32
4
64
32
1
Module 1 Matrix
Expansion
Cable
Module 2

NI SCXI-1378 Installation Instructions 10 ni.com
5. Install the Terminal Block
To connect the SCXI-1378 terminal block to the SCXI-1130 front panel,
refer to Figure 5 and complete the following steps (the SCXI-1130 should
already be installed in an SCXI chassis):
1. Plug the SCXI-1378 onto the front connectors of the SCXI-1130.
2. Tighten the top and bottom thumbscrews on the back of the terminal
block rear panel to hold it securely in place.
Figure 5. Installing the SCXI-1378 Terminal Block
1 Thumbscrew 2 Front Connectors 3 SCXI-1130 4 SCXI-1378
4
1
3
2

©National Instruments Corporation 11 NI SCXI-1378 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/certification, search by model number or product line, and click the
appropriate link in the Certification column.
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, visit
ni.com/certification, search by model number or product line, and click the
appropriate link in the Certification column.

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