National Instruments SCXI-1356 User manual

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April 2002
371212A-01
SCXI -1356 SHIELDED CABLE INSTALLATION GUIDE
This guide describes how to install the SCXI-1356 shielded cable between
a 100-pin VXI-MIO Series module and two SCXI modules.
Introduction
With the SCXI-1356 shielded cable, you can make a low-noise,
long-distance connection between a VXI-MIO Series module and two
SCXI modules. The cable is available in 1, 2, 5, and 10 m lengths. The
cable is Y-shaped, with a 100-pin male connector at one end and two 68-pin
female connectors on the branched end. One 68-pin connector branch is
labeled MIO-16, and the other is labeled ACH16-ACH63. Refer to
Figure 1 for the parts locator diagram.
The 100-pin connector attaches to a VXI-MIO-64E-1 or
VXI-MIO-64XE-10 module. The MIO-16 branch of the cable attaches to
an SCXI-1349 adapter. The ACH16–ACH63 branch of the cable attaches
to an AI-48/DIO-24 adapter.
The SCXI-1349 and AI-48/DIO-24 attach to a variety of SCXI modules.
Both of these adapters have breakout connectors for connecting to other
SCXI accessories, such as the SCXI-1180 and the SCXI-1351.
What You Need to Get Started
To install the SCXI-1356 shielded cable, you need the following items:
❑SCXI-1356 shielded cable (type SH96-6868)
❑SCXI-1356 Shielded Cable Installation Guide
❑SCXI-1349 adapter—several surface-mount parts and the number
182677 are visible on the underside of the board (included in this kit)
❑AI-48/DIO-24 adapter, labeled AI-48/DIO-24 on the underside of the
board (included in this kit)
™
ni.com

SCXI-1356 Shielded Cable Installation Guide 2 ni.com
❑Two SCXI modules
❑SCXI chassis
❑VXIbus chassis
❑One of the following modules:
– VXI-MIO-64E-1
– VXI-MIO-64XE-10
❑Four small screws (included in this kit)
❑Lockwashers
❑Jackscrews
❑Small Phillips screwdriver
❑Small flathead screwdriver
❑3/16 in. nutdriver
Conventions
The following conventions are used in this document:
bold Bold text denotes parameter names and hardware labels.
This icon denotes a note, which alerts you to important information.
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.
Safety Information
The following section contains important safety information that you must
follow when installing and using the product.
Do not operate the product in a manner not specified in this document.
Misuse of the product can result in a hazard. You can compromise the

©National Instruments Corporation 3 SCXI-1356 Shielded Cable Installation Guide
safety protection built into the product if the product is damaged in any
way. If the product is damaged, return it to National Instruments for repair.
Do not substitute parts or modify the product except as described in this
document. Use the product only with the chassis, modules, accessories, and
cables specified in the installation instructions. You must have all covers
and filler panels installed during operation of the product.
Do not operate the product in an explosive atmosphere or where there may
be flammable gases or fumes. Operate the product only at or below the
pollution degree stated in the Specifications section. Pollution is foreign
matter in a solid, liquid, or gaseous state that can reduce dielectric strength
or surface resistivity. The following is a description of pollution degrees:
• Pollution degree 1 means no pollution or only dry, nonconductive
pollution occurs. The pollution has no influence.
• Pollution degree 2 means that only nonconductive pollution occurs in
most cases. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
• Pollution degree 3 means that conductive pollution occurs, or dry,
nonconductive pollution occurs that becomes conductive due to
condensation.
Clean the product with a soft nonmetallic brush. Make sure that the product
is completely dry and free from contaminants before returning it to service.
You must insulate signal connections for the maximum voltage for which
the product is rated. Do not exceed the maximum ratings for the product.
Remove power from signal lines before connecting them to or
disconnecting them from the product.
Operate this product only at or below the installation category stated in the
Specifications section.
The following is a description of installation categories:
• Installation category I is for measurements performed on circuits not
directly connected to MAINS1. This category is a signal level such as
voltages on a printed wire board (PWB) on the secondary of an
isolation transformer.
Examples of installation category I are measurements on circuits not
derived from MAINS and specially protected (internal)
MAINS-derived circuits.
1 MAINS is defined as the electricity supply system to which the equipment concerned is designed to be connected either for
powering the equipment or for measurement purposes.

SCXI-1356 Shielded Cable Installation Guide 4 ni.com
• Installation category II is for measurements performed on circuits
directly connected to the low-voltage installation. This category refers
to local-level distribution such as that provided by a standard wall
outlet.
Examples of installation category II are measurements on household
appliances, portable tools, and similar equipment.
• Installation category III is for measurements performed in the building
installation. This category is a distribution level referring to hardwired
equipment that does not rely on standard building insulation.
Examples of installation category III include measurements on
distribution circuits and circuit breakers. Other examples of
installation category III are wiring including cables, bus-bars, junction
boxes, switches, socket outlets in the building/fixed installation, and
equipment for industrial use, such as stationary motors with a
permanent connection to the building/fixed installation.
• Installation category IV is for measurements performed at the source
of the low-voltage (<1,000 V) installation.
Examples of category IV are electric meters, and measurements on
primary overcurrent protection devices and ripple-control units.
Below is a diagram of a sample installation.
Electric
Meter
Circuit
Breaker
Plug-in
Equipment
Category IV Category III Category II Category I
Source of
Low-Voltage
(<1000 V)
Installation
Building/Fixed
Installation
Distribution
Panel
Local-Level
Distribution, such
as Wall Sockets
Secondary
Windings of
Isolation
Transformers

©National Instruments Corporation 5 SCXI-1356 Shielded Cable Installation Guide
Installing the SCXI-1356 Shielded Cable
Perform the following steps to install the SCXI-1356. Refer to Figure 1 and
Figure 2 as you complete the installation.
1. Power off the VXIbus chassis and the SCXI chassis.
2. Install the SCXI modules in the SCXI chassis, following the
instructions in the module user manuals.
3. Plug the socket connector of the SCXI-1349 into the rear signal
connector of the SCXI module that will pass analog signals to the
VXI-MIO Series module.
4. Secure the SCXI-1349 to the SCXI chassis by threading two of the
screws through the rear panel of the SCXI-1349 and into the threaded
strips in the rear of the SCXI chassis.
5. Connect the MIO-16 branch of the cable to the 68-pin connector of the
SCXI-1349.
6. Plug the socket connector of the AI-48/DIO-24 into the rear signal
connector of the SCXI module or the feedthrough panel to which you
plan to connect the ACH16–ACH63 signals of the VXI-MIO Series
module.
7. Secure the adapter by threading the other two screws through the rear
panel of the AI-48/DIO-24 and into the threaded strips in the rear of
the SCXI chassis.
8. Connect the ACH16–ACH63 branch of the cable to the 68-pin
connector of the AI-48/DIO-24.
9. Install the jackscrews and lockwashers as shown in Figure 2.
10. Verify that the two backshell mounting ears are positioned as shown in
Figure 2. If they are not, remove the mounting ears and install them in
the correct position.
11. Connect the backshell assembly to the VXI module front connector
and secure the backshell by tightening both M2.5 mounting screws.

SCXI-1356 Shielded Cable Installation Guide 6 ni.com
Figure 1. SCXI-1356 Installation Procedure
1 SCXI Modules
2 SCXI Chassis
3 SCXI-1349 Adapter
4 MIO-16 Branch of SCXI-1356
Shielded Cable
5 VXI-MIO Series Module
6 96-Pin Male Connector End of
SCXI-1356 Shielded Cable
7 ACH16–ACH63 Branch of
SCXI-1356 Shielded Cable
8 AI-48/DIO-24 Adapter
®
MAINFRAME
SCXI
®
MAINFRAME
SCXI
1
8
7
6
5
3
4
2

©National Instruments Corporation 7 SCXI-1356 Shielded Cable Installation Guide
Figure 2 shows a closer view of the ACH16–ACH63 branch of the cable
connecting to the VXI-MIO module.
Figure 2. VXI Module Connection
Connections and Pin Assignments
Which VXI-MIO Series module you use determines which SCXI modules
you can use with the SCXI-1356.
Connecting the SCXI-1356 to a VXI-MIO Series Module
The MIO-16 branch of the cable brings the MIO-16 portion of the
VXI-MIO Series pinout to the SCXI-1349. The ACH16-ACH63 branch
of the cable brings the remainder of the VXI-MIO Series pinout to the
AI-48/DIO-24.
1 Mounting Ear
2 Front Connector
3 Jackscrews
4 Lockwashers
5 VXI Module
6 M2.5 Mounting Screw
3
4
6
5
21

SCXI-1356 Shielded Cable Installation Guide 8 ni.com
MIO-16 Branch Connections
You can connect the MIO-16 branch of the cable, using the SCXI-1349,
to the following SCXI modules:
• SCXI-1100
• SCXI-1102
• SCXI-1120 or SCXI-1121 or SCXI-1122
• SCXI-1124
• SCXI-1140 or SCXI-1141
• SCXI-1160 or SCXI-1161 or SCXI-1162 or SCXI-1162R or
SCXI-1163 or SCXI-1163HV
• SCXI-1180 or SCXI-1181
Table 1 lists the pin assignments for connections between the VXI-MIO
Series module and the MIO-16 branch of the cable.
Table 1. Cable Connections for the MIO-16 Branch
Signal Names
Connector Pin Numbers
96-Pin 68-Pin 50-Pin
AIGND B17 24, 27, 29, 32,
56, 59, 64, 67
1, 2
ACH0 A23 68 3
ACH8 C22 34 4
ACH1 B22 33 5
ACH9 A22 66 6
ACH2 C21 65 7
ACH10 B21 31 8
ACH3 A21 30 9
ACH11 C20 63 10
ACH4 A20 28 11
ACH12 C19 61 12
ACH5 B19 60 13
ACH13 A19 26 14
ACH6 C18 25 15
ACH14 B18 58 16
ACH7 A18 57 17

©National Instruments Corporation 9 SCXI-1356 Shielded Cable Installation Guide
ACH15 C17 23 18
AISENSE1B20 62 19
DAC0OUT A24 22 20
DAC1OUT C23 21 21
EXTREF2B23 20 22
AOGND B24 54, 55 23
DGND B27 4, 7, 9, 12, 13, 15, 18,
35, 36, 39, 44, 50, 53
24, 33
DIO0 C24 25
DIO4 A25 19 26
DIO1 B25 17 27
DIO5 C25 51 28
DIO2 A26 49 29
DIO6 B26 16 30
DIO3 C26 47 31
DIO7 A27 48 32
+5V A28 8, 14 34, 35
SCANCLK C27 46 36
DIO4 A25 19 26
DIO1 B25 17 27
DIO5 C25 51 28
DIO2 A26 49 29
DIO6 B26 16 30
DIO3 C26 47 31
EXTSTROBE* B28 45 37
PFI0/TRIG1 C28 11 38
PFI1/TRIG2 A29 10 39
PFI2/CONVERT* B29 43 40
PFI3/GPCTR1_SOURCE C29 42 41
PFI4/GPCTR1_GATE A30 41 42
Table 1. Cable Connections for the MIO-16 Branch (Continued)
Signal Names
Connector Pin Numbers
96-Pin 68-Pin 50-Pin

SCXI-1356 Shielded Cable Installation Guide 10 ni.com
Note Avoid using the MIO-16 Branch digital lines by themselves when using the
SCXI-1356.
You can access the PFI lines on the MIO-16 Branch of the cable for
triggering through the SCXI-1349 side connector using the SCXI-1180
Feedthrough Panel. For more information on the SCXI-1180, refer to the
SCXI-1180/1181 User Manual.
ACH16-ACH63 Branch Connections
You can connect the ACH16–ACH63 branch of the cable, using the
AI-48/DIO-24, to the SCXI-1180 feedthrough panel or the SCXI-1181
breadboard module. Table 2 lists the pin designations for connections
between the VXI-MIO Series module and the ACH16–ACH63 cable.
GPCTR1_OUT B30 40 43
PFI5/UPDATE* C30 6 44
PFI6/WFTRIG A31 5 45
PFI7/STARTSCAN B31 38 46
PFI8/GPCTR0_SOURCE C31 37 47
PF19/GPCTR0_GATE A32 3 48
GPCTR0_OUT B32 2 49
FREQ_OUT C32 1 50
1SENSE for ACH0–ACH15
2This pin is not connected on the VXI-MIO-64XE-10
Table 2. Cable Connections for the ACH16–ACH63 Branch
Signal Names
Connector Pin Numbers
96-Pin 68-Pin 50-Pin
ACH16 A17 68 1
ACH24 C16 34 2
ACH17 B16 33 3
ACH25 A16 67 4
ACH18 C15 32 5
Table 1. Cable Connections for the MIO-16 Branch (Continued)
Signal Names
Connector Pin Numbers
96-Pin 68-Pin 50-Pin