SCXI Chassis User Manual and Specifications

SCXI
TM
SCXI Chassis User Manual
SCXI Chassis User Manual
April 2006
374423L-01
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Important Information
Warranty
The SCXI chassis (SCXI-1000, SCXI-1000DC, and SCXI-1001) are warranted against defects in materials and workmanship for a period of
one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace
equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects
in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National
Instruments will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives
notice of such defects during the warranty period. National Instruments does not warrant that the operation of the software shall be
uninterrupted or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before
any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are
covered by warranty.
National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical
accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent
editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected.
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Conventions
The following conventions are used in this manual:
»
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 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. When this icon is marked on the
product, refer to the Read Me First: Safety and Radio-Frequency
Interference document, shipped with the product, for precautions to take.
When symbol is marked on a product it denotes a warning advising you to
take precautions to avoid electrical shock.
When symbol is marked on a product it denotes a component that may be
hot. Touching this component may result in bodily injury.
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. Italic text 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.
NI-DAQ
Refers to both NI-DAQmx and Traditional NI-DAQ (Legacy) unless
otherwise noted.
SCXI chassis
Refers to the SCXI-1000, SCXI-1000DC, and SCXI-1001. When
information pertains to only one chassis, that chassis is named explicitly;
for example, the SCXI-1001 has 12 module slots.
SCXIbus
Refers to the backplane in the chassis. A signal on the backplane is referred
to as the SCXIbus <signal name> line (or signal). The SCXIbus descriptor
may be omitted when the meaning is clear.
Slot 0
Refers to the power supply and control circuitry in the SCXI chassis.
Contents
Chapter 1
Introduction
About the SCXI Chassis ................................................................................................1-1
What You Need to Get Started ......................................................................................1-1
Software Programming Choices ....................................................................................1-2
NI-DAQ...........................................................................................................1-2
National Instruments ADE Software...............................................................1-3
National Instruments Documentation ............................................................................1-4
Optional Equipment .......................................................................................................1-5
Chapter 2
Configuring and Installing the SCXI Chassis
Chassis Description........................................................................................................2-1
Chassis Uses ....................................................................................................2-7
Configuring the SCXI Chassis.......................................................................................2-8
Selecting Chassis Addresses............................................................................2-8
SCXI-1000/1001 ...............................................................................2-8
SCXI-1000DC...................................................................................2-9
Selecting Voltage and Replacing the Fuse for the SCXI-1000
and SCXI-1001 .............................................................................................2-11
Selecting the Voltage ........................................................................2-13
Replacing the Power Entry Module Fuse .........................................2-14
Replacing and Checking Backplane Fuses on the SCXI-1000
and SCXI-1001 ..............................................................................2-14
Replacing the Fuses on the SCXI-1000DC .....................................................2-15
Replacing the Power Entry Fuse and +5 VDC Fuse.........................2-15
Replacing and Checking Backplane Fuses .......................................2-16
Installing the SCXI Chassis ...........................................................................................2-17
Installing the SCXI-1000 and SCXI-1001 Chassis .........................................2-17
Installing the SCXI-1000DC Chassis..............................................................2-17
Installing Filler Panels ...................................................................................................2-18
Installing Front Filler Panels ...........................................................................2-18
Installing Rear Panels ......................................................................................2-19
Maintaining the Fan Filter .............................................................................................2-19
© National Instruments Corporation
v
SCXI Chassis User Manual
Contents
Appendix A
Specifications
Appendix B
Common Questions
Glossary
Index
Figures
Figure 2-1.
Figure 2-2.
Figure 2-3.
Figure 2-4.
Figure 2-5.
Figure 2-6.
Figure 2-7.
Figure 2-8.
SCXI-1000 Front View Diagram.......................................................... 2-2
SCXI-1000DC Front View Diagram .................................................... 2-3
SCXI-1001 Front View Diagram.......................................................... 2-4
SCXI-1000 Rear View Diagram ........................................................... 2-5
SCXI-1001 Rear View Diagram ........................................................... 2-6
SCXI-1000DC Rear View Diagram ..................................................... 2-7
Address Setting Examples .................................................................... 2-9
SCXI-1000DC Chassis Address Jumper Settings................................. 2-10
Figure A-1.
Figure A-2.
Physical Dimensions of the SCXI-1001 ............................................... A-3
Physical Dimensions of the SCXI-1000 and SCXI-1000DC ............... A-4
Tables
Table 2-1.
Table 2-2.
Table 2-3.
Table 2-4.
SCXI Chassis User Manual
SCXI Chassis Front View Items ........................................................... 2-1
SCXI-1000/1001 Chassis Rear View Items ......................................... 2-4
SCXI-1000DC Chassis Rear View Items ............................................. 2-6
SCXI-1000/1001 Voltage Selection and Fuse Ratings by Region ...... 2-12
vi
ni.com
1
Introduction
This manual describes the electrical and mechanical aspects of the
SCXI-1000, SCXI-1000DC, and SCXI-1001 chassis and contains
information concerning their operation. The SCXI chassis supply power
to and contain control circuitry for the SCXI series of modules. The
SCXI-1000 and SCXI-1000DC hold up to four modules. The SCXI-1001
holds up to 12 modules.
This chapter describes the SCXI chassis, lists what you need to get started,
and describes the optional software and equipment.
About the SCXI Chassis
The SCXI-1000 and SCXI-1001 chassis are powered with standard AC
power. The SCXI-1000DC is powered by any 9.5 to 16 VDC source such
as the optional SCXI-1382 battery pack or the SCXI-1383 power supply.
Every SCXI chassis supplies a low-noise environment for signal
conditioning, supplying power and control circuitry for the modules. It is
a general-purpose chassis that you can use with current SCXI modules.
Refer to Appendix A, Specifications, for detailed SCXI-1000,
SCXI-1000DC, and SCXI-1001 specifications.
What You Need to Get Started
To set up and use the SCXI chassis, you need the following items:
❑ Hardware
–
© National Instruments Corporation
One of the following SCXI chassis:
•
SCXI-1000
•
SCXI-1000DC
•
SCXI-1001
1-1
SCXI Chassis User Manual
Chapter 1
Introduction
–
–
One of the following, depending on your application:
•
Power cord (120, 220, or 240 VAC)
•
SCXI-1382 battery pack (SCXI-1000DC only)
•
SCXI-1383 (VDC) power supply (SCXI-1000DC only)
A computer
❑ Software
–
NI-DAQ
–
One of the following software packages:
•
LabVIEW
•
LabWindows™/CVI™
•
Measurement Studio
❑ Documentation
–
SCXI Chassis User Manual
–
Read Me First: Safety and Radio-Frequency Interference
–
SCXI Quick Start Guide
–
Documentation for your hardware
–
Documentation for your software
You can download documentation from ni.com/manuals.
Software Programming Choices
There are several options to choose from when programming the NI plug-in
DAQ and SCXI hardware. You can use LabVIEW, LabWindows/CVI,
Measurement Studio, or NI-DAQ.
NI-DAQ
NI-DAQ has an extensive library of functions that you can call from the
application development environment (ADE). These functions allow you
to use all the features of NI measurement products.
NI-DAQ carries out many of the complex interactions, such as
programming interrupts, between the computer and the DAQ hardware.
NI-DAQ maintains a consistent software interface among its different
versions so that you can change platforms with minimal modifications
to your code. Whether you are using LabVIEW, LabWindows/CVI,
SCXI Chassis User Manual
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Chapter 1
Introduction
Measurement Studio, VI Logger, or other ADEs, your application uses
NI-DAQ.
You can download the most recent version of NI-DAQ from ni.com/
downloads.
National Instruments ADE Software
LabVIEW features interactive graphics, a state-of-the-art interface, and
a powerful graphical programming language. The LabVIEW Data
Acquisition VI Library, a series of virtual instruments for using LabVIEW
with National Instruments DAQ hardware, is included with LabVIEW.
LabWindows/CVI is a complete ANSI C ADE that features an interactive
user interface, code generation tools, and the LabWindows/CVI Data
Acquisition and Easy I/O libraries.
Measurement Studio, which includes tools for Visual C++ and tools for
Visual Basic, is a development suite that allows you to design test and
measurement applications. For Visual Basic developers, Measurement
Studio features a set of ActiveX controls for using National Instruments
DAQ hardware. These ActiveX controls provide a high-level programming
interface for building virtual instruments (VIs). For Visual C++ developers,
Measurement Studio offers a set of Visual C++ classes and tools to
integrate those classes into Visual C++ applications. The ActiveX controls
and classes are available with Measurement Studio and the NI-DAQ
software.
VI Logger is an easy-to-use yet flexible tool specifically designed for data
logging applications. Using dialog windows, you can configure data
logging tasks to easily acquire, log, view, and share your data. VI Logger
does not require any programming; it is stand-alone, configuration-based
software.
Using LabVIEW, LabWindows/CVI, Measurement Studio, or VI Logger
greatly reduces the development time for your data acquisition and control
application.
© National Instruments Corporation
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SCXI Chassis User Manual
Chapter 1
Introduction
National Instruments Documentation
The SCXI Chassis User Manual is one piece of the documentation set for
the data acquisition and SCXI system. You could have any of several types
of documents, depending on the hardware and software in the system. Use
the documents you have as follows:
SCXI Chassis User Manual
•
The SCXI Quick Start Guide—This document describes how to set up
an SCXI chassis, install SCXI modules and terminal blocks, and
configure the SCXI system in Measurement & Automation Explorer
(MAX).
•
The SCXI hardware user manuals—Read these manuals next for
detailed information about signal connections and module
configuration. They also explain in greater detail how the module
works and contain application hints.
•
The DAQ hardware user manuals—These manuals have detailed
information about the DAQ hardware that plugs into or is connected to
the computer. Use these manuals for hardware installation and
configuration instructions, specification information about the DAQ
hardware, and application hints.
•
Software documentation—Examples of software documentation you
may have are the LabVIEW, Measurement Studio, and NI-DAQ
documentation sets. After you set up the hardware system, use either
the application software (LabVIEW or Measurement Studio) or the
NI-DAQ documentation to help you write your application. If you have
a large, complicated system, it is worthwhile to look through the
software documentation before you configure the hardware.
•
Accessory installation guides or manuals—If you are using accessory
products, read the terminal block and cable assembly installation
guides or accessory user manuals. They explain how to physically
connect the relevant pieces of the system. Consult these guides when
you are making the connections.
•
If you are designing your own module, the SCXIbus System
Specification is available from NI upon request. This specification
describes the physical, electrical, and timing requirements for the
SCXIbus.
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Chapter 1
Introduction
Optional Equipment
NI provides a full line of modules that amplify, filter, isolate, and multiplex
a wide variety of signal types, such as thermocouples, resistance
temperature detectors (RTDs), strain gauges, high-voltage inputs, current
inputs, analog outputs, and digital I/O signals. Cables and terminal blocks
with screw terminals, BNC connectors, or thermocouple plugs are
available to connect signals to the modules.
Refer to the latest NI catalog and ni.com/catalog for a complete listing
of sensors and I/O types supported in SCXI.
© National Instruments Corporation
1-5
SCXI Chassis User Manual
2
Configuring and Installing
the SCXI Chassis
This chapter contains instructions for configuring and installing the SCXI
chassis. It describes the following:
•
Chassis address selection
•
Voltage and fuse selection
•
Chassis, modules, and accessories installation
•
Fan filter maintenance
Chassis Description
Table 2-1 describes the front view items shown in Figures 2-1, 2-2,
and 2-3.
Table 2-1. SCXI Chassis Front View Items
Item
Definition
Power switch
Powers the chassis on and off
Indicator light
When lit, indicates that the chassis is powered on
Reset button
Reinitializes Slot 0 and all modules to their power-on state when
pressed
Slot 0/power supply
Contains the power supply and control circuitry for the chassis
Address DIP switches
Determine the chassis address—SCXI-1000 and SCXI-1001
Address selection
jumpers (located behind
the front panel)
Determine the chassis address—SCXI-1000DC only
Module guides
Guide modules to connect with the SCXIbus connector
Backplane
Brings power, control lines, and analog bus connections to modules
Front threaded strips
Secure modules in the chassis and attach front panels
© National Instruments Corporation
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Chapter 2
Configuring and Installing the SCXI Chassis
5
6
7
8
4
3
2
5
4
3
2
1
ADDRESS
1
9
ON
10
1
2
3
4
5
5
Address DIP Switches
Reset Button
Power Switch
Indicator Light
Front Panel Screws
(flathead on some revisions)
7
6
8
6
Front Panel Screws
(early revisions only)
7 Module Guides
8 Front Threaded Strips
9 Backplane
10 Slot 0/Power Supply
Figure 2-1. SCXI-1000 Front View Diagram
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5
Configuring and Installing the SCXI Chassis
6
7
8
4
3
2
9
1
10
1
2
3
4
5
5
Address Selection Jumpers
(behind front panel)
Reset Button
Power Switch
Indicator Light
Front Panel Screws
(flathead on some revisions)
6
7
8
6
Front Panel Screws
(early revisions only)
7 Module Guides
8 Front Threaded Strips
9 Backplane
10 Slot 0/Power Supply
Figure 2-2. SCXI-1000DC Front View Diagram
© National Instruments Corporation
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Chapter 2
Configuring and Installing the SCXI Chassis
5
6
7
8
7
8
4
3
2
ADDRESS
5
4
3
2
1
1
ON
5
10
1
2
3
4
5
6
9
Address DIP Switches
Reset Button
Power Switch
Indicator Light
Front Panel Screws (flathead on some revisions)
6
7
8
9
10
Front Panel Screws (early revisions only)
Module Guides
Front Threaded Strips
Backplane
Slot 0/Power Supply
Figure 2-3. SCXI-1001 Front View Diagram
Tables 2-2 and 2-3 describe the rear view items shown in Figures 2-4, 2-5,
and 2-6.
Table 2-2. SCXI-1000/1001 Chassis Rear View Items
Item
Description
Power entry module
IEC receptacle for power input, voltage selection board, and fuse
Fuse
Protects both you and the SCXI chassis in case of a fault in the chassis
Voltage tumbler
Configures the chassis for the AC line voltage
Fan(s)
Cools the chassis
Filter(s)
Prevents dirt from contaminating the circuitry in the chassis
Fan screws
Secure the fan(s) to the chassis
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Configuring and Installing the SCXI Chassis
Table 2-2. SCXI-1000/1001 Chassis Rear View Items (Continued)
Item
Description
Backplane fuses
Protect the power supply from shorts on modules
Rear connector space
For module space, connector mounting brackets, or adapters
Rear threaded strips
Secure cable connections, mounting brackets, or filler panels to
the chassis
4
5
6
120Vac
7
8
3
5
1
2
1
2
3
4
5
Fan and Filter
Fan Screws
Rear Threaded Strips
Rear Connector Space
Rear Panel Screws
(flathead on some revisions)
9
6
7
8
9
Voltage Tumbler
Power Entry Module
Fuse (concealed)
Backplane Fuses (behind fan)
Figure 2-4. SCXI-1000 Rear View Diagram
© National Instruments Corporation
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5
4
6
120Vac
7
3
8
5
1
1
2
9
1
2
3
4
5
Fans and Filters
Fan Screws (each fan)
Rear Threaded Strips
Rear Connector Space
Rear Panel Screws (flathead on some revisions)
6
7
8
9
Voltage Tumbler
Power Entry Module
Fuse (concealed)
Backplane Fuses (behind fan)
Figure 2-5. SCXI-1001 Rear View Diagram
Table 2-3. SCXI-1000DC Chassis Rear View Items
Item
Description
Power entry
connector J1
Receptacle for power input; uses a 9.5 to 16 VDC power source
Fuse F1
Power input fuse (6.3 A), protects both you and the SCXI chassis in case
of a fault in the chassis
Fuse F2
+5 VDC internal power supply fuse (3.15 A), protects the power supply
from shorts on modules
Fan(s)
Cools the chassis
Fan screws
Secure the fan(s) to the chassis
Backplane fuses
Protect the power supply from shorts on modules
Rear connector
space
For module space, connector mounting brackets, or adapter boards
Rear threaded strips
Secure cable connections, mounting brackets, or filler panels to the chassis
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5
4
J1
6
+
7
3
6.3A
250V
8
F2
3.15A
250V
5
1
2
1
2
3
4
5
F1
Fan and Filter
Fan Screws
Rear Threaded Strips
Rear Connector Space
Rear Panel Screws
(flathead on some revisions)
9
6
7
8
9
Power Entry Connector
Power Input Fuse
+5 VDC Internal Power Supply Fuse
Backplane Fuses (behind fan)
Figure 2-6. SCXI-1000DC Rear View Diagram
Chassis Uses
Before you configure the chassis, decide whether you are going to use it in
multiplexed mode or parallel mode.
In multiplexed mode, analog input (AI) channels are multiplexed into one
module output so that the cabled E/M Series DAQ device has access to the
multiplexed output of the module and the outputs of all other multiplexed
modules in the chassis.
In parallel mode, you need a separate E/M Series DAQ device for each
module to send each of its output channels directly to a separate AI channel
of the E/M Series DAQ device connected to the module.
© National Instruments Corporation
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SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
Configuring the SCXI Chassis
Configuring the chassis involves selecting a chassis or high-level data link
control (HDLC) address, line voltage, and fuse value on any chassis.
Note Refer to the Read Me First: Safety and Radio-Frequency Interference document
before removing equipment covers or connecting or disconnecting any signal wires.
Selecting Chassis Addresses
These sections provide information about how to select addresses for the
SCXI chassis.
SCXI-1000/1001
Unless you are using multiple chassis and need to configure one or more
SCXI chassis for a different address, you can skip this section, and the
SCXI chassis retains factory-default address of 0.
You can configure the SCXI chassis for one of 32 different addresses so that
you can connect multiple SCXI chassis to the same control source. The
five switches on the front panel of Slot 0 determine the chassis address.
Switches one through five represent the values 1, 2, 4, 8, and 16, when set
to the ON position. When set to the OFF position, their value is zero. The
chassis address is the sum of the switch values. Figure 2-7 shows examples
of both the factory-default setting of the chassis address 0 and the switch
setting for chassis address 19.
SCXI-1000 chassis through revision D do not have address jumpers or switches
and respond to any address, but you cannot use them in multichassis systems. Revision E
chassis use jumpers on Slot 0 for chassis addressing. Revision F and later chassis use a DIP
switch for chassis addressing.
Notes
SCXI-1001 chassis through revision D use jumpers on Slot 0 for chassis addressing.
Revision E and later chassis use a DIP switch for chassis addressing.
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Chapter 2
Configuring and Installing the SCXI Chassis
5
4
3
2
1
ON
Address = 0
(Chassis Default)
5
4
3
2
1
ON
Address = 19
Figure 2-7. Address Setting Examples
SCXI-1000DC
Unless you are using multiple chassis and need to configure one or more
SCXI chassis for a different address, you can skip this section, and the
SCXI chassis retains the factory-default address of 0.
You can configure the SCXI chassis for one of 32 different addresses so that
you can connect multiple SCXI chassis to the same control source. Three
jumpers that determine the chassis address are located behind the front
panel of Slot 0 just below the Reset button. The chassis address is the sum
of the values of all the jumpers. Figure 2-8 shows examples of both the
factory-default setting of address 0 and the jumper settings for address 19.
Note SCXI-1000DC chassis through revision C do not have address jumpers or switches
and respond to any address, but you cannot use them in multichassis systems. Revision D
and later chassis use jumpers on Slot 0 for chassis addressing.
© National Instruments Corporation
2-9
SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
W1
W1
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
W2
W2
+8
+8
W3
W3
+16
Chassis Address 0
Factory Setting
+16
Chassis Address 19
Example Setting
Figure 2-8. SCXI-1000DC Chassis Address Jumper Settings
Changing the Chassis Address
While referring to Figures 2-2 and 2-6, complete the following steps to
change the chassis address of the SCXI-1000DC:
SCXI Chassis User Manual
1.
Power off the chassis and remove the power cord from the power entry
module.
2.
To prevent a shock hazard, wait at least one minute before proceeding
to step 3.
3.
Using a screwdriver, remove the four (six on some revisions) panhead
screws from the front panel of Slot 0.
4.
Remove the six screws from the rear panel.
5.
Remove the controller from Slot 0.
6.
Set all three jumpers for the chassis address you want.
7.
Replace the controller in Slot 0.
8.
Replace the four (six on some revisions) screws. Do not overtighten.
9.
Replace the six screws in the rear panel. Do not overtighten.
2-10
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Chapter 2
Configuring and Installing the SCXI Chassis
Selecting Voltage and Replacing the Fuse for the SCXI-1000
and SCXI-1001
If you ordered the chassis with the appropriate part number (the -0x
extension of the kit part number corresponds to your geographical region),
the voltage tumbler and fuse are correct for operation in your geographical
region. Check the voltage on the voltage tumbler to ensure that you have
the correct voltage tumbler setting and fuse.
The SCXI chassis can operate with line voltages of 100, 120, 220, and
240 VAC. The voltage tumbler in the power entry module determines the
voltage for which the chassis is configured. You can identify the operating
voltage by looking at the number on the power entry module when the door
that covers the tumbler is closed. The fuse is 5 × 20 mm, which has a
current rating relative to the operating voltage. Table 2-4 shows the proper
voltage selections and fuse ratings for different regions.
Caution
For continued protection, replace fuses only with fuses of the same type and
rating.
© National Instruments Corporation
2-11
SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
Table 2-4. SCXI-1000/1001 Voltage Selection and Fuse Ratings by Region
SCXI
Chassis
Type
SCXI-1000
Region/Voltage
Main
Power Fuse
Quantity
Main Power
Fuse Type
Backplane
Fuse
Quantity
Backplane
Fuse Type
100 V Japan
1
T0.75A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
120 V
1
T0.5A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
220 V Swiss
1
T0.25A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
240 V Australia
1
T0.25A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
240 V Europe
1
T0.25A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
240 V North American
1
T0.25A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
240 V U.K.
1
T0.25A 250V
(5 mm × 20 mm
SLO-BLO)
2
F1.5A 125V (LittleFuse
R251 01.5 TI)
SCXI Chassis User Manual
2-12
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Chapter 2
Configuring and Installing the SCXI Chassis
Table 2-4. SCXI-1000/1001 Voltage Selection and Fuse Ratings by Region (Continued)
SCXI
Chassis
Type
SCXI-1001
Main
Power Fuse
Quantity
Region/Voltage
Main Power
Fuse Type
Backplane
Fuse
Quantity
Backplane
Fuse Type
100 V Japan
1
T3.0A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
120 V
1
T3.0A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
220 V Swiss
1
T1.6A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
240 V Australia
1
T1.6A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
240 V Europe
1
T1.6A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
240 V North American
1
T1.6A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
240 V U.K.
1
T1.6A 250 V
(5 mm × 20 mm
SLO-BLO)
2
F4A 125V (LittleFuse
R251 01.5 TI)
Selecting the Voltage
Complete the following steps to select a voltage:
1.
Power off the chassis.
2.
Remove the power cord from the power entry module.
3.
Using a flathead screwdriver, pry the door to the tumbler open from
the top.
4.
Remove the voltage tumbler.
5.
Rotate the tumbler to the appropriate voltage and reinsert it into the
power entry module.
6.
Close the door.
7.
Check to make sure that the voltage showing on the selection tumbler
is correct.
8.
Reinsert the power cord.
© National Instruments Corporation
2-13
SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
Replacing the Power Entry Module Fuse
Caution
Disconnect all power before removing the cover.
Complete the following steps to replace the power entry module fuse:
1.
Power off the chassis.
2.
Remove the power cord from the power entry module.
3.
Using a flathead screwdriver, pry the door to the voltage selection
tumbler open from the top.
4.
Pull out the fuse drawer.
5.
Remove the fuse.
6.
Install the new fuse in the drawer.
7.
Reinsert the fuse drawer in the right-hand slot with the arrow pointing
to the right.
8.
Close the door.
9.
Reinsert the power cord.
Replacing and Checking Backplane Fuses on the
SCXI-1000 and SCXI-1001
In addition to the power entry module fuse, the analog supply lines on the
backplane are fused at 1.5 A on the SCXI-1000 chassis and at 4 A on the
SCXI-1001 chassis.
If you are making your own modules, fuse the module at 250 mA to avoid
blowing the backplane fuses. Fusing the module better protects the module
when a failure results in a large amount of current drawn by not allowing
the current to blow the backplane fuses.
On the SCXI-1000, the backplane fuses are located behind the fan. On the
SCXI-1001, the backplane fuses are located behind the right-hand fan, near
the power entry module, as viewed from the rear of the chassis.
Complete the following steps to check or replace fuses:
1.
SCXI Chassis User Manual
Remove the appropriate fan and filter from the rear of the chassis by
following the instructions in the Maintaining the Fan Filter section.
Make sure to switch the power off and remove the power cord.
2-14
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Chapter 2
Configuring and Installing the SCXI Chassis
2.
The fuse marked with a copper + on the backplane is for the positive
analog supply, and the fuse marked with a copper – is for the negative
analog supply. To check whether a fuse is blown, connect an ohmmeter
across the leads. If the reading is not approximately 0 Ω, replace
the fuse.
3.
Using a pair of needle-nose pliers, carefully extract the fuse.
4.
Take a new fuse and bend its leads so the component is 12.7 mm
(0.5 in.) long, the dimension between the fuse sockets, and clip the
leads to a length of 6.4 mm (0.25 in.).
5.
Using the needle-nose pliers, insert the fuse into the socket holes.
6.
Repeat for the other fuse if necessary.
7.
Check the fan filter and, if it is dirty, clean it as described in the
Maintaining the Fan Filter section.
8.
Reinstall the fan and filter.
Replacing the Fuses on the SCXI-1000DC
There are two fuses located on the rear panel of the SCXI-1000DC. The
input power fuse (F1) is a 6.3 A, 5 × 20 mm time-lag fuse. The internal
+5 VDC supply is fused by a 3.15 A, 5 × 20 mm time-lag fuse (F2).
Replacing the Power Entry Fuse and +5 VDC Fuse
For continued protection against fire, replace fuses only with fuses of the same
type and rating.
Caution
Complete the following steps to replace the rear panel fuses:
1.
Power off the chassis.
2.
Remove the power cord from power entry connector J1.
3.
Turn the fuse holder counter-clockwise with a screwdriver and pull out
the fuse holder to expose the fuse in the housing.
4.
Remove the fuse.
5.
Install the new fuse.
6.
Push the fuse holder back into the housing and screw it clockwise until
it is secure.
7.
Reinsert the power cord.
© National Instruments Corporation
2-15
SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
Replacing and Checking Backplane Fuses
In addition to the power entry and the +5 V supply fuses, the analog supply
lines on the backplane are fused at 1.5 A on the SCXI-1000DC chassis.
If you design a special/prototype module, use the SCXI-1181 module and
fuse the module at 250 mA to avoid blowing the analog backplane and
+5 V supply fuses. Fusing the module better protects the module when a
failure results in a large amount of current drawn by not allowing the
current to blow the backplane fuses and +5 V fuses.
On the SCXI-1000DC, the backplane fuses are located behind the fan.
Complete the following steps to check or replace fuses:
SCXI Chassis User Manual
1.
Remove the appropriate fan and filter from the rear of the chassis by
following the instructions in the Maintaining the Fan Filter section.
Be sure to switch the power off and remove the power cord.
2.
The fuse marked with a copper + on the backplane is for the positive
analog supply, and the fuse marked with a copper – is for the negative
analog supply. To check whether a fuse is blown, connect an ohmmeter
across the leads. If the reading is not approximately 0 Ω, replace the
fuse.
3.
Using a pair of needle-nose pliers, carefully extract the fuse.
4.
Take a new fuse and bend its leads so the component is 12.7 mm
(0.5 in.) long, the dimension between the fuse sockets, and clip the
leads to a length of 6.4 mm (0.25 in.).
5.
Using the needle-nose pliers, insert the fuse into the socket holes.
6.
Repeat, if necessary, for the other fuse.
7.
Check the fan filter and, if it is dirty, clean it as described in the
Maintaining the Fan Filter section.
8.
Reinstall the fan and filter.
2-16
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Chapter 2
Configuring and Installing the SCXI Chassis
Installing the SCXI Chassis
These sections provide information about installing the SCXI chassis.
Installing the SCXI-1000 and SCXI-1001 Chassis
Complete the following steps to install the SCXI-1000 and SCXI-1001
chassis:
1.
If necessary, change the chassis address of the box by following the
instructions in the Selecting Chassis Addresses section. Unless you are
using multiple chassis, skip this step and leave the address at its
factory-default setting of 0.
2.
Place the SCXI chassis on a sturdy, level surface. Leave at least 10 cm
(4 in.) of space behind the chassis for adequate air circulation.
3.
Power off the chassis.
4.
Make sure the voltage selection tumbler in the power entry module is
set for the line voltage of the outlet. Refer to the Selecting the Voltage
section if necessary.
5.
Insert the female end of the power cord into the power entry module.
6.
Insert the male end of the power cord into the wall outlet.
7.
Install the modules into the chassis.
8.
Install the necessary cabling for the modules. Consult the SCXI
module user manual for cabling installation instructions.
9.
Install any front and rear filler panels.
10. Power on the chassis.
11. Power on the computer connected to the modules.
12. Refer to the SCXI Quick Start Guide to complete the SCXI system
installation.
Installing the SCXI-1000DC Chassis
Complete the following steps to install the SCXI-1000DC chassis:
1.
If necessary, change the chassis address by following the instructions
in the Selecting Chassis Addresses section. Unless you are using
multiple chassis, skip this step and leave the address at its
factory-default setting of 0.
2.
Place the SCXI chassis on a sturdy, level surface. Leave at least 10 cm
(4 in.) of space behind the chassis for adequate air circulation.
3.
Place the chassis power switch in the off position.
© National Instruments Corporation
2-17
SCXI Chassis User Manual
Chapter 2
Configuring and Installing the SCXI Chassis
4.
Make sure the voltage of the power source is between 9.5 and 16 VDC.
5.
Insert the power plug into the header J1.
Caution Revision A SCXI-1000DC chassis have screw terminals on the rear panel to
connect the power source. Wire the power source to these screw terminals. Observe the
correct polarity, as connecting the power source with the wrong polarity can cause
permanent damage to the chassis. NI is not liable for any damage or injuries resulting from
improper power connections.
6.
Install the modules into the chassis.
7.
Install the necessary cabling for the modules. Consult the SCXI
module user manual for cabling installation instructions.
8.
Install any needed front and rear filler panels.
9.
Power on the chassis.
10. Power on the computer connected to the modules.
11. Refer to the SCXI Quick Start Guide to complete the SCXI system
installation.
Installing Filler Panels
The front and rear filler panel accessories protect the inside of the chassis
and the installed modules by preventing unwanted material from entering
the chassis and damaging modules, or forming conductive paths that can
degrade performance. Install all modules first, then start installing filler
panels from the edge of a front panel.
Installing Front Filler Panels
Complete the following steps to install front filler panels:
SCXI Chassis User Manual
1.
Place the panel with the captive screws to the right of the chassis front.
Line up the screws with the threaded strip holes.
2.
Using a flathead screwdriver, screw the captive screws into the
threaded strip holes.
2-18
ni.com
Chapter 2
Configuring and Installing the SCXI Chassis
Installing Rear Panels
Complete the following steps to install rear panels:
1.
Place the panel at the rear of the chassis between the two threaded
strips. Align the panel so that the serial number faces into the chassis
and the screw holes are on the right.
2.
Using a flathead screwdriver, screw the two screws through the rear
panel into the threaded strip holes.
Maintaining the Fan Filter
The brushless fan(s) on the rear of the SCXI chassis cool the chassis and
modules. To keep the fan effective, the fan filter(s) must be clean. Dust and
dirt accumulation reduces airflow, making the inside of the chassis hotter,
shortening the life of the chassis and modules. Complete the following
steps to clean the fan filter(s):
1.
Power off the chassis.
2.
Remove the power cord from the power entry module.
3.
Place the chassis face down on a flat surface so that the fan is on top.
If the chassis is so heavily cabled that you cannot easily place it in this
position, leave the chassis as it is, but be careful to support the fan
during removal and reinstallation to avoid breaking the fan wires.
4.
Remove the fan filter. Remove the four screws that secure the fan and
filter to the rear of the chassis. When removing the last screw, be
careful to hold the fan to avoid breaking the fan wires.
5.
Clean the fan filter by moving the filter around under a gentle stream
of cold tap water until all the dust is removed. Dry the filter.
6.
Replace the fan filter by aligning the fan and filter with the fan holes,
making sure that the label side of the fan is face down. Reinstall the
four screws and make sure the assembly is secure.
© National Instruments Corporation
2-19
SCXI Chassis User Manual
A
Specifications
This appendix lists the specifications of the SCXI chassis. These are typical
at 25 °C unless otherwise stated.
Electrical Characteristics
SCXI-1000/
1000DC
SCXI-1101
Tolerance limits include
peaks
+18.5 to +25 V
+18.5 to +25 V
Ripple (peak-to-peak)
1.5 V
1.5 V
Max load
680 mA
2.04 A
Tolerance limits include
peaks
–18.5 to –25 V
–18.5 to –25 V
Ripple (peak-to-peak)
1.5 V
1.5 V
Max load
680 mA
2.04 A
Tolerance limits include
peaks
+4.75 to +5.25 V
+4.75 to +5.25 V
Ripple (peak-to-peak)
50 mV
50 mV
Max load
250 mA
600 mA
Supplies
V+
V–
+5 V
Power dissipation ................................... 7 W per slot
© National Instruments Corporation
A-1
SCXI Chassis User Manual
Appendix A
Specifications
Maximum loads are the supply current for the entire chassis. Scaling the
maximum power gives the allotted current per slot, as follows.
Supplies
SCXI-1000/1000DC
SCXI-1001
V+
170 mA
170 mA
V–
170 mA
170 mA
+5 V
50 mA
50 mA
Source Power Requirements
Max AC Current
Line Voltage,
47–63 Hz
SCXI-1000
SCXI-1001
100 VAC, ±10%
0.5 A
1.7 A
120 VAC, ±10%
0.6 A
1.5 A
220 VAC, ±10%
0.25 A
0.8 A
240 VAC, ±10%
0.25 A
0.8 A
SCXI-1000DC
Input voltage ...........................................12 VDC nominal
(9.5 to 16.0 VDC)
Max DC operating current
at 9.5 VDC ..............................................5.5 A
Physical
Weight
SCXI-1000..............................................3.9 kg (8 lb, 10 oz)
SCXI-1000DC ........................................3.3 kg (7 lb, 5 oz)
SCXI-1001..............................................6.8 kg (14 lb, 14 oz)
Refer to Figures A-1 and A-2 for the physical dimensions of the four-slot
chassis (SCXI-1000 and SCXI-1000DC) and the 12-slot chassis
(SCXI-1001).
SCXI Chassis User Manual
A-2
ni.com
Specifications
Figure A-1. Physical Dimensions of the SCXI-1001
Appendix A
© National Instruments Corporation
A-3
SCXI Chassis User Manual
Figure A-2. Physical Dimensions of the SCXI-1000 and SCXI-1000DC
Appendix A
Specifications
SCXI Chassis User Manual
A-4
ni.com
Appendix A
Specifications
Environmental
Operating temperature............................ 0 to 50 °C
Storage temperature ............................... –20 to 70 °C
Humidity ................................................ 10 to 90% RH, noncondensing
Maximum altitude .................................. 2,000 meters
Pollution Degree (indoor use only) ........ 2
Safety
The chassis are 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 1244
•
CAN/CSA-C22.2 No. 61010-1
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, operate this device with shielded cabling.
© National Instruments Corporation
A-5
SCXI Chassis User Manual
Appendix A
Specifications
CE Compliance
The chassis meet 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.
SCXI Chassis User Manual
A-6
ni.com
B
Common Questions
My chassis worked fine until I inadvertently removed and reinserted a
module while the chassis was on. Now my chassis does not power on.
What can I do?
SCXI modules are not hot swapable, so you may have blown a fuse. Refer
to Chapter 2, Configuring and Installing the SCXI Chassis, for information
on fuse replacement. If replacing the fuse does not correct the problem, you
may have damaged the digital bus circuitry or the SCXI module. Please
contact NI Technical Support at ni.com/support for assistance.
My chassis power is on, my modules are configured for multiplexed
mode, and I am not getting good data. All the channels read the same
voltage even though I know I am putting different voltages into each
channel. What is causing this problem?
The SCXI chassis has backplane fuses. One or both of these fuses could be
blown. Refer to the Replacing and Checking Backplane Fuses on the
SCXI-1000 and SCXI-1001 section of Chapter 2, Configuring and
Installing the SCXI Chassis, for fuse replacement information.
Can I programmatically detect whether or not my chassis is
powered on?
Not exactly. You can determine whether or not you can communicate with
configured modules through SCXI_ModuleID_Read in NI-DAQ or using
a LabVIEW VI that you can obtain from ni.com/express by entering the
info code rdtscp.
My chassis will not power on. What should I check?
Check the to make sure the power cord is attached and connected to a power
source. Look at the voltage selection tumbler above the power cord
receptacle and make sure it is set to the correct voltage. Make sure the
power switch is powered on. Verify that the main power fuse is good.
© National Instruments Corporation
B-1
SCXI Chassis User Manual
Glossary
Symbol
Prefix
Value
p
pico
10 –12
m
milli
10–3
k
kilo
103
Numbers/Symbols
°
degrees
–
negative of, or minus
Ω
ohms
±
plus or minus
+
positive of, or plus
%
percent
+5 V (signal)
+5 VDC source signal
A
A
amperes
A/D
analog-to-digital
AC
alternating current
C
C
Celsius
© National Instruments Corporation
G-1
SCXI Chassis User Manual
Glossary
D
D/A
digital-to-analog
DAQ
data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and processing the
measurement data using a computer; (2) collecting and measuring the same
kinds of electrical signals with A/D and/or DIO boards plugged into a
computer, and possibly generating control signals with D/A and/or DIO
boards in the same computer
F
fuse
a protective device that breaks a circuit when a current exceeds a rated value
G
GND
ground
H
HDLC
high-level data-link control
Hz
hertz—cycles per second of a periodic signal
I
I/O
input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
IEC
International Electrotechnical Commission
in.
inch or inches
K
kg
SCXI Chassis User Manual
kilograms
G-2
ni.com
Glossary
L
lb
pounds
O
oz
ounces
S
s
seconds
SCXI
Signal Conditioning eXtensions for Instrumentation
V
V
volts
VAC
volts, alternating current
VDC
volts, direct current
W
W
watts
© National Instruments Corporation
G-3
SCXI Chassis User Manual
Index
Symbols
chassis usage considerations, 2-7
fuse replacement and check procedure,
backplane
SCXI-1000 and SCXI-1001, 2-14
SCXI-1000DC, 2-16
fuse replacement for power entry module
+5 VDC fuse replacement,
SCXI-1000DC, 2-15
voltage selection for SCXI-1000 and
SCXI-1001
procedure, 2-13
voltage selection and fuse ratings by
region (table), 2-12
conventions used in the manual, iv
+5 VDC fuse replacement, SCXI-1000DC, 2-15
A
address selection, 2-8
jumper settings
SCXI-1000 and SCXI-1001
(figure), 2-9
SCXI-1000DC (figure), 2-10
jumperless chassis (note), 2-8
SCXI-1000 and 1001, 2-8
SCXI-1000DC, 2-9
B
D
backplane fuse replacement and check procedure
SCXI-1000 and 1001, 2-14
SCXI-1000DC, 2-16
documentation
conventions used in the manual, iv
National Instruments documentation, 1-4
related documentation, 1-4
C
cables, optional equipment, 1-5
CE compliance specifications, A-6
chassis address selection. See address selection
configuration
See also installation
address selection
SCXI-1000 and SCXI-1001, 2-8
figure, 2-9
SCXI-1000DC, 2-9
figure, 2-10
chassis descriptions
front view diagrams, 2-2, 2-3, 2-4
front view items (table), 2-1
rear view diagrams, 2-5, 2-6, 2-7
rear view items (table), 2-4, 2-6
© National Instruments Corporation
E
electromagnetic compatibility
specifications, A-5
environmental specifications, A-5
equipment, optional, 1-5
F
fan filter maintenance, 2-19
filler panel installation
front filler panel, 2-18
rear filler panel, 2-19
frequently asked questions, B-1
I-1
SCXI Chassis User Manual
Index
fuse replacement
backplane fuse replacement and check
procedure
SCXI-1000 and SCXI-1001, 2-14
SCXI-1000DC, 2-16
fuse ratings by region (table)
SCXI-1000 and SCXI-1001, 2-12
fuse replacement for power entry module
+5 VDC fuse replacement,
SCXI-1000DC, 2-15
SCXI-1000DC, 2-15
fuse, blown, B-1
overview, 1-1
SCXI chassis descriptions
front view diagrams
SCXI-1000, 2-2
SCXI-1000DC, 2-3
SCXI-1001, 2-4
front view items (table), 2-1
rear view diagrams
SCXI-1000, 2-5
SCXI-1000DC, 2-7
SCXI-1001, 2-6
rear view items (table)
SCXI-1000 and 1001, 2-4
SCXI-1000DC, 2-6
SCXI modules
troubleshooting and common
questions, B-1
SCXI-1000
address selection, 2-8
jumper settings (figure), 2-9
front view diagram, 2-2
fuse replacement
backplane fuse replacement and
check procedure, 2-14
fuse ratings by region (table), 2-12
power entry module, 2-14
installation, 2-17, A-3
physical dimensions (figure), A-4
rear view diagram, 2-5
rear view items (table), 2-4
source power requirements, A-2
voltage selection, 2-11
procedure, 2-13
voltage selection and fuse ratings by
region (table), 2-12
SCXI-1000DC
address selection, 2-9
jumper settings (figure), 2-10
front view diagram, 2-3
I
installation
chassis descriptions
front view diagrams, 2-2, 2-3, 2-4
front view items (table), 2-1
rear view diagrams, 2-5, 2-6, 2-7
rear view items (table), 2-4, 2-6
fan filter maintenance, 2-19
filler panel installation, 2-18
SCXI-1000 and SCXI-1001, 2-17
SCXI-1000DC, 2-17
M
maintenance of fan filter, 2-19
P
problems and solutions, B-1
S
safety specifications, A-5
SCXI chassis
common questions, B-1
hardware and software requirements, 1-1
optional equipment, 1-5
SCXI Chassis User Manual
I-2
ni.com
Index
fuse replacement
+5 VDC fuse replacement, 2-15
backplane fuse replacement and
check procedure, 2-16
power entry fuse and +5 VDC, 2-15
installation, 2-17
physical dimensions (figure), A-4
rear view diagram, 2-7
rear view items (table), 2-6
source power requirements, A-2
SCXI-1001
address selection, 2-8
jumper settings (figure), 2-9
front view diagram, 2-4
fuse replacement
backplane fuse replacement and
check procedure, 2-14
fuse ratings by region (table), 2-12
power entry module, 2-14
installation, 2-17
physical dimensions (figure), A-3
rear view diagram, 2-6
rear view items (table), 2-4
source power requirements, A-2
voltage selection, 2-11
procedure, 2-13
voltage selection and fuse ratings by
region (table), 2-12
software programming choices, 1-2
source power requirements
SCXI-1000 and 1001, A-2
SCXI-1000DC, A-2
specifications
CE compliance, A-6
electrical characteristics (table), A-1
electromagnetic compatibility, A-5
environmental, A-5
physical dimensions
SCXI-1000 and SCXI-1000DC
(figure), A-4
SCXI-1001 (figure), A-3
© National Instruments Corporation
safety, A-5
source power requirements
SCXI-1000 and 1001, A-2
SCXI-1000DC, A-2
weight, A-2
V
voltage selection
See also fuse replacement
SCXI-1000 and SCXI-1001, 2-11
procedure, 2-13
voltage selection and fuse ratings by
region (table), 2-12
W
weight specifications, A-2
I-3
SCXI Chassis User Manual
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