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SCXI Quick Start Guide
™
Signal Conditioning eXtensions for Instrumentation
Contents
CVI™, LabVIEW™, Measurement Studio™, National Instruments™, NI™, ni.com™, NI-DAQ™, and SCXI™ are trademarks of National Instruments
Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering
National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD,
or ni.com/patents.
323236A-01
This document assumes you have already installed, configured, and tested
a data acquisition (DAQ) device. If you have not done so, follow the
instructions in the DAQ Quick Start Guide for NI-DAQ 7.0 included with
the DAQ device before continuing. This document does not cover
PXI chassis, PXI combo chassis, the SCXI-1000DC chassis, the SCXI
switch modules, multichassis systems, or parallel-mode operation of any
module. Refer to the module, chassis, or cable adapter documentation for
information on these topics. If you are installing an SCXI switch, refer to
the NI Switches Getting Started Guide.
Conventions ............................................................................................ 2
Measurement System Overview ............................................................. 3
Step 1. Unpack the Module and Accessories .......................................... 4
Step 2. Verify the Components ............................................................... 5
Step 3. Set up the Chassis ....................................................................... 6
Step 4. Install Modules............................................................................ 7
Step 5. Attach Terminal Blocks .............................................................. 8
Step 6. Attach Sensors ............................................................................ 8
Step 7. Connect Modules to the DAQ Device ........................................ 9
Step 8. Power on the SCXI Chassis ........................................................ 9
Step 9. Launch Measurement & Automation Explorer (MAX).............. 9
Step 10. Add the SCXI Chassis .............................................................. 10
Step 11. Configure the Chassis ............................................................... 11
Traditional NI-DAQ ........................................................................ 11
NI-DAQmx ...................................................................................... 13
Step 12. Configure the SCXI Modules ................................................... 15
Traditional NI-DAQ ........................................................................ 15
NI-DAQmx ...................................................................................... 18
Step 13. Test the Chassis......................................................................... 21
Step 14. Configure Channels and Tasks ................................................. 21
Configure a Task in NI-DAQmx ..................................................... 22
Configure Global Channels for NI-DAQmx ................................... 24
Configure Virtual Channels for Traditional NI-DAQ ..................... 25
Getting Started Developing an Application ............................................ 25
Examples.......................................................................................... 25
© 2003 National Instruments Corp. All rights reserved.
April 2003
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Page 1: Table Of Contents
CVI™, LabVIEW™, Measurement Studio™, National Instruments™, NI™, ni.com™, NI-DAQ™, and SCXI™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents. -
Page 2: Conventions
This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, properties, methods, variables, filenames and extensions, and code excerpts. SCXI Quick Start Guide ni.com... -
Page 3: Measurement System Overview
NI-DAQmx, Traditional NI-DAQ, VISA, etc. Data Acquisition and Modular Instrumentation PCMCIA Signal Conditioning ® PXI/SCXI Combination SCXI Sensors and Transducers – – – – Real-World Signals and Physical Phenomena Figure 1. Measurement System Overview © National Instruments Corporation SCXI Quick Start Guide... -
Page 4: Step 1. Unpack The Module And Accessories
Do not install a damaged module in the chassis. Store the module in the antistatic package when the module is not in use. Refer to the device documentation for safety and compliance information. SCXI Quick Start Guide ni.com... -
Page 5: Step 2. Verify The Components
® 1 Terminal Block or TBX Accessories (optional) 5 Cable Assembly (Shielded Cable and 2 SCXI Modules Cable Adapter) 3 SCXI-1000 or SCXI-1001 Chassis 6 DAQ Device 4 Chassis Power Cord 7 Personal Computer © National Instruments Corporation SCXI Quick Start Guide... -
Page 6: Step 3. Set Up The Chassis
Confirm the correct power settings (100, 120, 220, or 240 VAC). Connect the power cord. 1 Chassis Power Switch 3 Chassis Power Settings 2 Chassis Address Switches 4 Power Cord Connector SCXI Quick Start Guide ni.com... -
Page 7: Step 4. Install Modules
Step 4. Install Modules Caution Make sure the chassis is powered off. Insert all of the modules into the chassis. Tighten the module thumbscrews. ® 1 Thumbscrews 2 Module © National Instruments Corporation SCXI Quick Start Guide... -
Page 8: Step 5. Attach Terminal Blocks
• For signal connection information, refer to the module or accessory documentation. • If any module in the SCXI system has switch or jumper settings, refer to Getting Started with SCXI for more information about configuring the hardware. • For more information about sensors, refer to the following documents: –... -
Page 9: Step 7. Connect Modules To The Daq Device
Do not force the adapter if there is resistance. Forcing the adapter can bend pins. Connect one end of the cable to the adapter or module and the other end to the DAQ device. Notice which SCXI module is connected to the DAQ device; you will use this information in a later step. -
Page 10: Step 10. Add The Scxi Chassis
SCXI chassis. Right-click Devices & Interfaces»Traditional NI-DAQ Devices and select Add SCXI Chassis. If you are using NI-DAQmx, there is an alternative way to add an SCXI chassis. Right-click Devices & Interfaces»NI-DAQmx Devices and select Create New NI-DAQmx Device. Select NI-DAQmx SCXI Chassis and choose the chassis. -
Page 11: Step 11. Configure The Chassis
If you are using Traditional NI-DAQ, complete the following steps, as shown in the figures, to configure the SCXI chassis. Select an ID for the SCXI chassis. The ID can be any integer between 1 and 3,200. Use this ID to identify the chassis in your application. - Page 12 Select the DAQ device, which acts as the communication path between the chassis and the computer. Click Next. Select the SCXI module that is cabled to the communication device. If the chassis has only one module, NI-DAQ selects the module by default.
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Page 13: Ni-Daqmx
Enter the chassis address setting in Chassis Address. Make sure the setting matches the address setting on the SCXI chassis. Select whether or not to auto-detect SCXI modules. If you do not auto-detect modules, MAX disables Communicating SCXI Module Slot. - Page 14 You cannot save the chassis configuration until you finish entering module information. A message at the top of the SCXI Chassis Configuration window alerts you of the status of the configuration. You cannot save if an error appears in the message box.
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Page 15: Step 12. Configure The Scxi Modules
Step 12. Configure the SCXI Modules The configuration process differs depending on the NI-DAQ API you are using to program the modules—Traditional NI-DAQ or NI-DAQmx. Traditional NI-DAQ If you are using Traditional NI-DAQ, complete the following steps to configure the SCXI modules. - Page 16 Some modules require an operating mode—multiplexed or parallel. Select a mode from Operating Mode. Some modules feature software-selectable filter and/or gain settings for each channel. Available settings vary between modules. If applicable, click the Channel tab. Select settings from the displayed fields. SCXI Quick Start Guide ni.com...
- Page 17 Click the Accessory tab. Select a compatible device from the Accessory listbox. Click OK to accept the settings. © National Instruments Corporation SCXI Quick Start Guide...
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Page 18: Ni-Daqmx
Select the chassis from Devices and Interfaces»NI-DAQmx Devices. Right-click the module and choose Properties. Note You also can access module properties by selecting the Modules tab of the SCXI Chassis Configuration window and clicking Details. SCXI Quick Start Guide ni.com... - Page 19 Some SCXI modules have jumper-selectable settings. If you are configuring such a module, click the Jumpers tab and enter the hardware-selected settings. Click the Accessory tab. To change the accessory selected during chassis configuration, select a module accessory from the Accessory drop-down listbox.
- Page 20 Cabling tab. Select the DAQ device connected to the SCXI module from the Which device connects to this module? drop-down listbox. In most cases, the device selected here and the module digitizer are the same.
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Page 21: Step 13. Test The Chassis
A task, an important new concept for NI-DAQmx, is a collection of one or more virtual channels with timing, triggering, and other properties. Conceptually, a task represents a measurement or generation you want to © National Instruments Corporation SCXI Quick Start Guide... -
Page 22: Configure A Task In Ni-Daqmx
In Measurement Studio, open Visual Studio .NET and select Project»Add New Item to open the Add New Item dialog box. In the Categories pane, select Measurement Studio»Assistants. In the Templates pane, select DAQmx Task Class. The DAQ Assistant opens. SCXI Quick Start Guide ni.com... - Page 23 If you opened the DAQ Assistant from Measurement Studio, select File»Save. You now can use the task in an application. Refer to the DAQ Assistant Help or application software documentation for more information about using a task or generating code. © National Instruments Corporation SCXI Quick Start Guide...
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Page 24: Configure Global Channels For Ni-Daqmx
You now can use the global channel in an application or add the global channel to a task. Refer to the DAQ Assistant Help or application software documentation for more information about using a channel or generating code. SCXI Quick Start Guide ni.com... -
Page 25: Configure Virtual Channels For Traditional Ni-Daq
To locate LabVIEW and LabWindows/CVI examples, open the National Instruments Example Finder: • In LabVIEW, select Help»Find Examples. • In LabWindows/CVI, select Help»NI Example Finder. © National Instruments Corporation SCXI Quick Start Guide... - Page 26 LabVIEW and describes key new NI-DAQmx features and concepts such as the DAQ Assistant and tasks. Select Help»Taking an NI-DAQmx Measurement in LabVIEW to open the tutorial. SCXI Quick Start Guide ni.com...
- Page 27 Device Documentation NI-DAQ 7.0 includes the Device Document Browser, which contains online documentation for supported DAQ, SCXI, and switch devices, such as help files describing device pinouts, features, and operation, and PDF files of the printed device documents. You can find, view, and/or print the ©...
- Page 28 What is causing this problem? The SCXI chassis has backplane fuses, fused at 1.5 A on the SCXI-1000 chassis and at 4 A on the SCXI-1001 chassis. One or both of the fuses might be blown. 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.
- Page 29 Now my chassis does not power on. What can I do? SCXI modules are not hot swappable, so you may have blown a fuse. If replacing the fuse does not correct the problem, you may have damaged the digital bus circuitry or the SCXI module.
- Page 30 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 in NI-DAQ or using SCXI_ModuleID_Read a LabVIEW VI that you can obtain from by entering the ni.com/express info code...
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