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TM
SCXI
SCXI-1125 User Manual
SCXI-1125 User Manual
April 2008
372425B-01
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Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 662 457990-0, Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599, Canada 800 433 3488, China 86 21 5050 9800, Czech Republic 420 224 235 774, Denmark 45 45 76 26 00, Finland 358 (0) 9 725 72511, France 01 57 66 24 24, Germany 49 89 7413130, India 91 80 411900
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Important Information Warranty The SCXI-1125 is 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, d
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Conventions The following conventions are used in this manual: < > Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name—for example, P0.<3..0>. » 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 ale
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Contents Chapter 1 About the SCXI-1125 What You Need to Get Started ......................................................................................1-1 National Instruments Documentation ............................................................................1-2 Installing Application Software, NI-DAQ, and the DAQ Device .................................1-4 Installing the SCXI-1125 Module into the SCXI Chassis...............................1-4 Connecting the SCXI-1125 in an SCXI Chassi
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Contents Chapter 3 Configuring and Testing SCXI-1125 Software-Configurable Settings................................................................. 3-1 Common Software-Configurable Settings ...................................................... 3-1 Filter Bandwidth ............................................................................... 3-1 Gain/Input Range.............................................................................. 3-1 Connecting the SCXI-1125 in an SCXI Chassis to a
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Contents Configuring Channel Properties........................................................5-8 Acquiring, Analyzing, and Presenting ..............................................5-9 Completing the Application ..............................................................5-9 Developing an Application Using LabVIEW..................................................5-9 Using a DAQmx Channel Property Node in LabVIEW ...................5-11 Specifying Channel Strings in NI-DAQmx...................
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Contents Appendix A Specifications Appendix B Using SCXI Channel Strings with Traditional NI-DAQ (Legacy) 7.0 or Later Appendix C Removing the SCXI-1125 Appendix D Common Questions Glossary Index Figures Figure 2-1. Connecting a Ground-Referenced Signal ............................................. 2-2 Figure 2-2. Connecting a Floating Signal................................................................ 2-3 Figure 2-3. Connecting a Floating AC-Coupled Signal .................................
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Contents Tables Table 2-1. Front Signal Pin Assignments ..............................................................2-6 Table 2-2. Rear Signal Pin Assignments ................................................................2-8 Table 5-1. Extended Gain and Range Using the SCXI-1327 or SCXI-1313A.......5-4 Table 5-2. Extended Gain and Range Using the TBX-1316 ..................................5-5 Table 5-3. NI-DAQmx Properties ....................................................................
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1 About the SCXI-1125 This chapter introduces the SCXI-1125 module and explains how to install the software and hardware. The SCXI-1125 is an eight-channel isolated analog input conditioning module with programmable gain and filter settings on each channel and is jumperless. Each channel has 12 programmable gain settings from 1 to 2000 and two programmable filter settings of either 4 Hz or 10 kHz. Each channel has an external circuit for grounding the inputs that you can use for offset cal
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Chapter 1 About the SCXI-1125 Note For maximum allowable voltage for a particular terminal block refer to Table A-2, Terminal Block Maximum Voltages. – SCXI or PXI/SCXI combination chassis – One of the following: � E/M Series DAQ device � SCXI-1600 module – A computer if using an SCXI chassis – Cabling, cable adapter, and sensors as required for your application ❑ Software – NI-DAQ 7.0 or later – One of the following software packages: �LabVIEW ™ ™ � LabWindows /CVI � Measurement Studio ❑ Doc
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Chapter 1 About the SCXI-1125 � The SCXI Quick Start Guide—This document contains a quick overview for setting up an SCXI chassis, installing SCXI modules and terminal blocks, and attaching sensors. It also describes setting up the SCXI system in 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. � Accessory instal
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Chapter 1 About the SCXI-1125 Installing Application Software, NI-DAQ, and the DAQ Device Refer to the DAQ Getting Started Guide packaged with the NI-DAQ software to install your application software, NI-DAQ driver software, and the DAQ device to which you will connect the SCXI-1125. NI-DAQ 7.0 or later is required to configure and program the SCXI-1125 module. If you do not have NI-DAQ 7.0 or later, you can either contact a NI sales representative to request it on a CD or download the la
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Chapter 1 About the SCXI-1125 Connecting the SCXI-1125 to a n E/M Series DAQ Device for Parallel Scanning This configuration allows you to route all eight channels of the SCXI-1125 in parallel to eight input channels of the E/M Series DAQ device to which it is connected. In this mode, you cannot directly access the CJC channel. Use this mode if you require a higher scanning rate than an SCXI system in multiplexed mode allows. If you have not already installed all the modules, refer to the
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Chapter 1 About the SCXI-1125 Manually Adding Modules in NI-DAQmx If you did not auto-detect the SCXI modules, you must manually add each of the modules. Refer to the SCXI Quick Start Guide to manually add modules. Note NI recommends auto-detecting modules for the first time configuration of the chassis. Installing SCXI Using Traditional NI-DAQ (Legacy) in Software Refer to the SCXI Quick Start Guide for information on installing modules using Traditional NI-DAQ (Legacy) in software. Manual
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Chapter 1 About the SCXI-1125 Troubleshooting the Self-Test Verification If the Self-Test Verification did not verify the chassis configuration, complete the steps in this section to troubleshoot the SCXI configuration. Troubleshooting in NI-DAQmx � If you get a Verify SCXI Chassis message box showing the SCXI chassis model number, Chassis ID: x, and one or more messages stating Slot Number: x Configuration has module: SCXI-XXXX or 1125, hardware in chassis is: Empty, take the following tr
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Chapter 1 About the SCXI-1125 module following the steps listed in the SCXI Quick Start Guide. Click OK. b. If another module appears where the cabled module should be, click the drop-down listbox next to the correct slot and select the cabled module. A message box appears asking you to confirm the module replacement. Click OK. Configure the cabled module following the steps listed in the SCXI Quick Start Guide. Click OK. � Ensure that you have the highest priority SCXI module cabled to t
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2 Connecting Signals This chapter describes the input and output signals connections to the SCXI-1125 module with the module front connector and the rear signal connector. This chapter also includes specifications and connection instructions for the signals on the SCXI-1125 module connectors. Notes Refer to the Read Me First: Safety and Radio-Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires. For EMC compliance, operate this d
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Chapter 2 Connecting Signals completely isolated from other channels. You can operate with common-mode voltage levels up to 300 V . rms Figures 2-1 through 2-4 show signal connection methods that give the highest noise immunity. Ground-Referenced Signal When the negative input signal line is connected either directly or indirectly to earth ground (usually at the transducer end), connect this line to the negative input terminal, as shown in Figure 2-1. No ground connection is made at the SC
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Chapter 2 Connecting Signals Floating Signal In cases where both signal lines at the transducer end are floating and no common-mode voltage exists, establish an earth connection at the SCXI-1125 by connecting the negative input line to chassis ground in the terminal block, as shown in Figure 2-2. This eliminates noise that can ride on the floating signal. If the floating signal is not configured like Figure 2-2, the noise can couple to the chassis ground through the amplifier and exhibit
