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SC-2040
User Manual
Eight-Channel Simultaneous Sample-and-Hold Accessory
September 1994 Edition
Part Number 371191A-01
© Copyright 1994 National Instruments Corporation.
All Rights Reserved.
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National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia (03) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20, Canada (Ontario) (519) 622-9310, Canada (Québec) (514) 694-8521, Denmark 45 76 26 00, Finland (90) 527 2321, France (1) 48 14 24 24, Germany 089/741 31 30, Italy 02/48301892, Japan (03) 3788-1921, Netherlands 03480-33466, Norway 32-848400, Spain (91) 640
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Limited Warranty The SC-2040 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. A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before any equip
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Warning Regarding Medical and Clinical Use of National Instruments Products National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans. Applications of National Instruments products involving medical or clinical treatment can create a potential for accidental injury caused by product failure, or by errors on the part of the user or application designer. Any use or application of Nati
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Contents About This Manual................................................................................................................ix Organization of This Manual............................................................................................ix Conventions Used in This Manual......................................................................
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Contents Chapter 4 Theory of Operation .......................................................................................................... 4-1 Functional Overview......................................................................................................4-1 Analog Circuitry ............................................................................................................4-3 Input Protection................................................................................
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Contents Figures Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware............................................................................. 1-3 Figure 2-1. SC-2040 Parts Locator Diagram..........................................................................2-2 Figure 3-1. SC-2040 I/O Connectors J11 and J12..................................................................3-2 Figure 3-2. SC-2040 Signal Routing.........................................
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About This Manual This manual describes the electrical and mechanical aspects of the SC-2040 and contains information concerning its configuration and operation. The SC-2040 is an eight-channel simultaneously sampling differential amplifier for the National Instruments MIO-16E Series DAQ boards. The SC-2040 samples all eight channels at the same time, preserving interchannel phase relati
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About This Manual Conventions Used in This Manual The following conventions are used in this manual: bold italic Bold, italic text denotes a note, caution, or warning. italic Italic text denotes emphasis, a cross reference, or an introduction to a key concept. MIO-16E MIO-16E refers to the National Instruments E-Series of MIO-16 DAQ boards unless otherwise noted. monospace Lowercase text in this font denotes text or characters that are to be literally input from the keyboard, sections of code, p
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About This Manual Related Documentation The following document contains information that you may find helpful as you read this manual: • Your DAQ hardware user manual Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains comment and configuration forms for you to com
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Chapter 1 Introduction This chapter describes the SC-2040, lists what you need to get started with your SC-2040, describes the optional software and optional equipment, and explains how to unpack your SC-2040. About the SC-2040 The SC-2040 is an eight-channel simultaneously sampling differential amplifier for the National Instruments MIO-16E Series DAQ boards.
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Introduction Chapter 1 Software Programming Choices Your SC-2040 kit does not include software. There are four options to choose from when programming your National Instruments DAQ and SCXI hardware. You can use LabVIEW, LabWindows, NI-DAQ, or register-level programming software. The SC-2040 works with LabVIEW for Windows, LabVIEW for Macintosh, LabWindows for DOS, LabWindows/CVI for Windows, NI-DAQ software for PC compatibles, and NI-DAQ software for Macintosh. LabVIEW and LabWindows Applicat
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Chapter 1 Introduction NI-DAQ also internally addresses many of the complex issues between the computer and the DAQ hardware such as programming interrupts and DMA controllers. NI-DAQ maintains a consistent software interface among its different versions so that you can change platforms with minimal modifications to your code. Figure 1-1 illustrates the relationship between NI-DAQ and LabVIEW and LabWindows. You can see that the data acquisition parts of LabVIEW and LabWindows are functionall
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Introduction Chapter 1 Register-Level Programming There are no register-level programming concerns for the SC-2040. When using the SC-2040, only the MIO-16E Series board needs to be programmed. Refer to your MIO-16E board manual for further information on register-level programming. Optional Equipment Contact National Instruments to order the following optional equipment: • CB-50 I/O connector (50-screw terminals) with 0.5 or 1.0 m cable • Single or double height rack-mount kit with acrylic pl
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Chapter 2 Configuration and Installation This chapter describes the configuration and installation of your SC-2040. The topics discussed are switch and jumper configuration, connection of the SC-2040 to the MIO-16E, and the power- on sequence for your SC-2040 configuration. Board Configuration The SC-2040 has 10 jumpers, eight DIP switches, and one slide switch
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Configuration and Installation Chapter 2 Figure 2-1. SC-2040 Parts Locator Diagram SC-2040 User Manual 2-2 © National Instruments Corporation
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Chapter 2 Configuration and Installation The SC-2040 has one switch that controls whether the board is powered from an external supply or from the MIO-16E board. Furthermore, two jumpers control how the board is shielded and grounded. Additionally, there are eight sets of switches and jumpers that configure the gain settings and input modes of the eight SC-2040 channels. Table 2-1. Power Supply Selection Switch Description Configuration INT position—Use this setting SW1 to configure the SC-
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Configuration and Installation Chapter 2 Table 2-2. Shield Selection Jumper Description Configuration SHLD OFF position—Place W1 W1 the jumper in this position to keep the SC-2040 analog SHLD OFF ground isolated from the metal standoffs in the corners of the SHLD ON board (factory setting). SHLD ON position—Place W1 the jumper in this position to SHLD OFF connect the SC-2040 analog ground to the metal standoffs SHLD ON or to a rack-mount kit, which may provide shielding for the SC-2040. Table 2
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Chapter 2 Configuration and Installation Table 2-4. Channel Gain Selection Switch Description Configuration Unity gain position—For A B C D U2 unity gain (gain = 1), open all 12 34 U6 the switches by pushing down U9 the OFF end of the switches. U14 OFF U17 (factory setting) U21 U24 U28 The unity gain position has the number side up. Gain Table Other gains—Refer to Supplementary Configuration Information, later in the chapter, and the gain table on the board itself. Table 2-5. Channel Input M
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Configuration and Installation Chapter 2 Supplementary Configuration Information Power Supply Selection Set switch SW1 to the INT position to connect the SC-2040 power converter to the +5 V lines on the MIO-16E board. Set switch SW1 to the EXT position to draw power from an external +5 V power supply connected to J13. The MIO-16E is fused to provide 5 W of power (at +5 V and 1 A). The SC-2040 consumes nearly all of this available power. Therefore, if you have other DAQ accessories that you wo
