National Instruments SC-2040 - Manuals

© National Instruments Corporation ix SC-2040 User Manual About This Manual This manual describes the electrical and mechanical aspects of the SC-2040 and containsinformation concerning its configuration and operation. The SC-2040 is an eight-channelsimultaneously sampling differential amplifier for...

About This Manual SC-2040 User Manual x © National Instruments Corporation 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 ...

About This Manual © National Instruments Corporation xi SC-2040 User 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 ...

© National Instruments Corporation 1-1 SC-2040 User Manual Chapter 1Introduction 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 yourSC-2040. About the SC-2040 The SC-2040 is a...

Introduction Chapter 1 SC-2040 User Manual 1-2 © National Instruments Corporation Software Programming Choices Your SC-2040 kit does not include software. There are four options to choose from whenprogramming your National Instruments DAQ and SCXI hardware. You can use LabVIEW,LabWindows, NI-DAQ, or...

Chapter 1 Introduction © National Instruments Corporation 1-3 SC-2040 User Manual NI-DAQ also internally addresses many of the complex issues between the computer and theDAQ hardware such as programming interrupts and DMA controllers. NI-DAQ maintains aconsistent software interface among its differe...

Introduction Chapter 1 SC-2040 User Manual 1-4 © National Instruments Corporation 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 manualfor further in...

© National Instruments Corporation 2-1 SC-2040 User Manual Chapter 2Configuration and Installation This chapter describes the configuration and installation of your SC-2040. The topics discussedare switch and jumper configuration, connection of the SC-2040 to the MIO-16E, and the power-on sequence f...

Chapter 2 Configuration and Installation © National Instruments Corporation 2-3 SC-2040 User Manual The SC-2040 has one switch that controls whether the board is powered from an external supplyor from the MIO-16E board. Furthermore, two jumpers control how the board is shielded andgrounded. Addition...

Configuration and Installation Chapter 2 SC-2040 User Manual 2-4 © National Instruments Corporation Table 2-2. Shield Selection Jumper Description Configuration W1 SHLD OFF position—Placethe jumper in this position tokeep the SC-2040 analogground isolated from the metalstandoffs in the corners of th...

Chapter 2 Configuration and Installation © National Instruments Corporation 2-5 SC-2040 User Manual Table 2-4. Channel Gain Selection Switch Description Configuration U2U6U9U14U17U21U24U28 Gain Table Unity gain position—Forunity gain (gain = 1), open allthe switches by pushing downthe OFF end of the...

Configuration and Installation Chapter 2 SC-2040 User Manual 2-6 © National Instruments Corporation 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 onthe MIO-16E board. Set switch SW1 to the EX...

Chapter 2 Configuration and Installation © National Instruments Corporation 2-7 SC-2040 User Manual To close a switch, push down the number side. Closing switch A selects a gain of 500. Closingswitch B selects a gain of 200. Closing switch C selects a gain of 100. Closing switch D selectsa gain of 1...

Configuration and Installation Chapter 2 SC-2040 User Manual 2-8 © National Instruments Corporation Installation Note: You must turn off power to the PC, and to the SC-2040 board if the board is externally powered, before installing the board or making any connections to it. To install the SC-2040, ...

© National Instruments Corporation 3-1 SC-2040 User Manual Chapter 3Signal Connections This chapter describes the signal connections to the SC-2040 board, and cable wiring. I/O Connector Pin Description Warning: Connections that exceed any of the maximum ratings of input or output signals on the MIO...

Chapter 3 Signal Connections © National Instruments Corporation 3-3 SC-2040 User Manual Table 3-1. Pin Assignments for Connectors J11 and J12 Breakout Connector J11 Pin Numbers SC-2040 Signal Names 1 MIO-16E Series Signal Names I/O Connector J12 Pin Numbers 1, 2 AIGND AIGND 24, 27, 29, 32, 56, 59, 6...

Signal Connections Chapter 3 SC-2040 User Manual 3-4 © National Instruments Corporation Signal Connection Description Table 3-2. Input Connectors Signal Summary Connector Signal Name Description J5 AIGND Analog Input Ground—These inputs provide a bias current return pointfor AC-coupled signals. J1, ...

Chapter 3 Signal Connections © National Instruments Corporation 3-7 SC-2040 User Manual Analog Signal Inputs Connect the differential signals to be measured to the screw terminal connectors J1 through J4and J5 through J9. DC-Coupled Inputs Note: If all your inputs are DC-coupled, leave connector J5 ...

Signal Connections Chapter 3 SC-2040 User Manual 3-8 © National Instruments Corporation Figure 3-4 illustrates how to connect a floating signal. IN- IN+ SC-2040 V in CH+ CH- A 100 k Ω A B C Figure 3-4. Floating Signal Connection AC-Coupled Signals Note: For AC-coupled signals, you must reference the...

Signal Connections Chapter 3 SC-2040 User Manual 3-10 © National Instruments Corporation IN- IN+ 100 k Ω V in SC-2040 CH+ CH- A A B C Figure 3-7. Floating AC-Coupled Signal Connection Analog Input Ranges Warning: Exceeding the differential and common-mode input ranges results in distorted input sign...

Chapter 3 Signal Connections © National Instruments Corporation 3-11 SC-2040 User Manual where V + i n is the signal at the positive input (IN0+ through IN7+), and V - i n is the signal at the corresponding negative input (IN0- through IN7-). Both V + i n and V - i n are measured with respect to the...

© National Instruments Corporation 4-1 SC-2040 User Manual Chapter 4Theory of Operation This chapter contains a functional overview of the SC-2040 board and explains the operation ofeach functional unit making up the SC-2040. Functional Overview The SC-2040 consists of eight channels, each one compr...

Chapter 4 Theory of Operation © National Instruments Corporation 4-3 SC-2040 User Manual Analog Circuitry The analog input circuitry consists of eight channels with DIP-switch-programmableinstrumentation amplifiers followed by buffered track-and-hold amplifiers. In addition, you caninclude the volta...

Theory of Operation Chapter 4 SC-2040 User Manual 4-4 © National Instruments Corporation find the inputs again after having been in hold mode. Therefore, this delay indicates how longthe SC-2040 must remain in track mode before it is ready to re-enter hold mode. Returning theSC-2040 to hold mode bef...

Chapter 4 Theory of Operation © National Instruments Corporation 4-5 SC-2040 User Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Differential Channel Input PFI7 (track*/hold) SC-2040 Channel Output hold hold track t DAQ Conv...

Theory of Operation Chapter 4 SC-2040 User Manual 4-6 © National Instruments Corporation t DAQ Conversion t DAQ Conversion . . . . . hold hold track track Differential Channel Input PFI2 (external trigger) PFI7 (track*/hold) SC-2040 Channel Output . . . . . . . . . . . . . . . . . . . . . . . . . . ...

© National Instruments Corporation 5-1 SC-2040 User Manual Chapter 5Calibration Procedures This chapter discusses the calibration procedures for the SC-2040 board. Note: In many applications, the SC-2040 factory-hardware calibration is sufficient to meet accuracy requirements, and no further calibra...

Calibration Procedures Chapter 5 SC-2040 User Manual 5-2 © National Instruments Corporation Gain Adjustment Gain adjustment requires you to apply two different input signals. One of the two points istypically zero, because zero is easy to generate with a high degree of accuracy. The other shouldbe n...

Chapter 5 Calibration Procedures © National Instruments Corporation 5-3 SC-2040 User Manual Your accuracy needs determine how carefully the offsets need to be calibrated. A typicalrequirement might be for total offset referred to output to be less than half of an LSB of the DAQboard being used. For ...

Calibration Procedures Chapter 5 SC-2040 User Manual 5-4 © National Instruments Corporation 4. Set the DAQ board to a high gain and measure its offset by shorting its input. You must subtract this measured offset from all subsequent board measurements to ensureaccuracy. For the offset of the DAQ boa...

© National Instruments Corporation A-1 SC-2040 User Manual Appendix ASpecifications This appendix lists the specifications for the SC-2040. These are typical at 25 ° C unless otherwise stated. The operating temperature range is 0 ° to 50 ° C. Analog Input Input Characteristics Number of channels 8 d...

Specifications Appendix A SC-2040 User Manual A-2 © National Instruments Corporation Amplifier Characteristics Input impedance Normal powered on 100 G Ω in parallel with 20 pF Input bias current ± 100 pA, ± 10 mA max Input offset current ± 10 pA CMRR Gain dB (min and typ) Gain = 1 70 dB min, 90 dB t...

Appendix A Specifications © National Instruments Corporation A-3 SC-2040 User Manual S/H Characteristics Measurement 0.012% 0.003% 0.0015% 0.00076% Track modeacquisitiontime 7 µ s 10 µ s 50 µ s 1 ms Hold modesettling time 1 µ s 1 µ s 1 µ s 2 µ s Hold step -5 mV — — — Droop rate ± 10 mV/s — — — Apert...

© National Instruments Corporation B-1 SC-2040 User Manual Appendix BCustomer Communication For your convenience, this appendix contains forms to help you gather the information necessaryto help us solve technical problems you might have as well as a form you can use to comment onthe product documen...

Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware, and use the completedcopy of this form as a reference for your current configuration. Completing this form accurately before contactingNational Instruments for technical support helps ou...

Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. Thisinformation helps us provide quality products to meet your needs. Title: SC-2040 User Manual Edition Date: September 1994 Part Number: 371191A-01 Please comment on the compl...

© National Instruments Corporation Glossary-1 SC-2040 User Manual Glossary ___________________________________________________ Prefix Meaning Value p- pico- 10- 12 n- nano- 10- 9 µ - micro- 10- 6 m- milli- 10- 3 k- kilo- 10 3 M- mega- 10 6 ˚ degrees Ω ohms A amperes ACH# DAQ board analog input chann...

© National Instruments Corporation Index- 1 SC-2040 User Manual Index Numbers/Symbols +5 V signal input connector summary (table), 3-4output connector summary (table), 3-4 to 3-5 A AC-coupled inputs, 3-8 to 3-11 common-mode input range, 3-10 to 3-11exceeding differential and common-mode ranges (warn...

Index SC-2040 User Manual Index- 2 © National Instruments Corporation procedure for, 2-6 to 2-7switch settings (table), 2-7table, 2-5 channel input mode (table), 2-5CH+(0..7) signal (table), 3-4common-mode input range, 3-10 to 3-11configuration channel gain selection gain switches for each channel (...

Index SC-2040 User Manual Index- 4 © National Instruments Corporation register-level programming, 1-4 specifications analog input amplifier characteristics, A-2dynamic characteristics, A-2input characteristics, A-1S/H characteristics, A-3stability, A-3transfer characteristics, A-1 environment, A-3ph...