Instruction/ maintenance manual of the product BNC-2140 National Instruments
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DAQ BNC-2140 User Manual Dynamic Signal Acquisition Signal Conditioning Accessory BNC-2140 User Manual June 1998 Edition Part Number 3219 33B-01 UM.book Page 1 Tuesday, July 14, 1998 10:37 AM.
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Important Information Warranty The BNC-2140 i s warranted agains t defects in materi als and workmanship for a period of one year from the dat e of shipment, as evidenced by receipts or other documentati on. National Instruments will, at its option, repair or replace equipment that pro ves to be d efective duri ng th e warrant y pe riod.
© National Instruments Corporation v BNC-2140 User Manual Contents About This Manual Organization of This Manual .............. ........... .............. ............... .............. .............. ....... vii Conventions Used in This Manual .....
Contents BNC-2140 User Manual vi © National Instruments Corporation Power Requirement (from DSA board) .......... .............. .............. ........... ......... A-2 Physical .. .............. .............. ............... .............. .......
© National Instruments Corporation vii BNC-2140 User Manual About This Manual This manual describes the electrical and mechanical aspects of the BNC-2140 accessory and contains information concerning its operation.
About This Manual BNC-2140 User Manual viii © National Instruments Corporation Conventions Used in This Manual The following con ventions are used in this manual: < > Angle brackets containing numbers separated b y an ellipsis represent a range of v alues associated with a bit or signal name—for e xample, DIO<3.
© National Instruments Corporation 1-1 BNC-2140 User Manual 1 Introduction This chapter describes the BNC-2140 accessory, lists what you need to get started, explains how to unpack your BNC-2140, and describes optional equipment. Thank you for buying the BNC-2140 accessory for DSA.
Chapter 1 Introduction BNC-2140 User Manual 1-2 © National Instruments Corporation What Y ou Need to Get Started To set up and use your BNC-2140 device, you will need the following: ❑ BNC-2140 ❑ .
Chapter 1 Introduction © National Instruments Corporation 1-3 BNC-2140 User Manual If your application requires that you use a prepolarized microphone with a microphone preamplifier , contact Brüel and Kjær .
© National Instruments Corporation 2-1 BNC-2140 User Manual 2 Installation and Configuration This chapter explains how to install and configure your BNC-2140 accessory. Installation Note Y ou must turn the power of f to your computer before installing the BNC-2140.
Chapter 2 Installation and Configuration BNC-2140 User Manual 2-2 © National Instruments Corporation Figure 2-1. Switch Settings and Signal Connections ® UM.
© National Instruments Corporation 3-1 BNC-2140 User Manual 3 Signal Connections This chapter describes how to connect input and output signals to your BNC-2140. Y ou can connect the external analog signals through six BNC connectors. Four BNC connectors are for input signals and two connectors are for output signals.
Chapter 3 Signal Connections BNC-2140 User Manual 3-2 © National Instruments Corporation +D AC1OUT –D A C1O UT Output +An alog Output Channel 1—This pin supplies the analog non-in verting output channel 1. This signal passes through the internal BNC co nductor .
Chapter 3 Signal Connections © National Instruments Corporation 3-3 BNC-2140 User Manual Figure 3 -1 describes the pin connections on the BNC-2140 68-pin connector .
Chapter 3 Signal Connections BNC-2140 User Manual 3-4 © National Instruments Corporation Note This BNC-2140 pin assignment maps to the pin assignment of the DSA device you are connecting to the BNC-2140. Refer to your DSA device user manual for the pin assignments specific to your device connection.
Chapter 3 Signal Connections © National Instruments Corporation 3-5 BNC-2140 User Manual The outer shell of the BNC connectors is not GND (0 V). The outer shell of the BNC is not physically connected to the metal box of the BNC-2140.
© National Instruments Corporation 4-1 BNC-2140 User Manual 4 Theor y of Operation This chapter contains a functional overview of the BNC-2140. UM.book Page 1 Tuesday, July 14, 1998 10:37 AM.
Chapter 4 Theory of Operation BNC-2140 User Manual 4-2 © National Instruments Corporation Functional Over view Figure 4 -1 is a block diagram of the BNC-2140.
Chapter 4 Theory of Operation © National Instruments Corporation 4-3 BNC-2140 User Manual Analog Input Circuitr y The BNC-2140 has four identical analog input channels. A principal function of the BNC-2140 is to supp ly a constant curren t for ICP type accelerometers and microphone preamplif iers.
Chapter 4 Theory of Operation BNC-2140 User Manual 4-4 © National Instruments Corporation Analog Output The BNC-2140 has two an alog output channels. The BNC-2140 can also select between DIFF and SE outputs. In DIFF mode, one line connects to the positi ve output of the channel and the other connects to the negati ve output of that same channel.
© National Instruments Corporation A-1 BNC-2140 User Manual A Specifications This appendix lists the specif ications of the BNC-2140 accessory . All specifications are typical at 25° C unless otherwise noted. All specif ications are relati ve to measurement standards and require a 15 minute warm-up period.
Appendix A Specifications BNC-2140 User Manual A-2 © National Instruments Corporation Temperature coefficient ........... .............. .±141 ppm/° C Voltage compliance ............ .............. ......24 V Excitation overvoltage protection .....
© National Instruments Corporation B-1 BNC-2140 User Manual B Customer Communication For your con venience, this appendix contains forms to help you gather the information necessary to help us solv e yo ur technical problems and a form you can use to comment on the product documentation.
BNC-2140 User Manual B-2 © National Instruments Corporation Fax-on-Demand Support Fax-on-Demand is a 24-hour information retrie val system containing a library of documents on a wide range of technical information. Y ou can access Fax-on-Demand from a touch-tone telephone at 512 418 1111.
T echnical Support Form Photocopy this form and update it each time you mak e changes to your software or hardware, and use the completed copy of this form as a reference for your current conf iguration.
Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our pro ducts. This information helps us provide quality products to meet your needs. Title: BNC-2140 User Manual Edition Date: June 1998 Part Number: 321933B-01 Please comment on the completeness, clarity , and organization of the manual.
© National Instruments Corporation G-1 BNC-2140 User Manual Glossar y Pref ix Meanings V alue p- pico 10 –1 2 n- nano- 10 –9 µ- micro- 10 –6 m- milli- 10 –3 k- kilo- 10 3 M- mega- 10 6 G- gi.
Glossary BNC-2140 User Manual G-2 © National Instruments Corporation A CH a nalo g input channel signal A/D analog-to-digital ADC analog-to-digital conv erter—an electronic device, often an integra.
Glossary © National Instruments Corporation G-3 BNC-2140 User Manual C C Celsius channel pin or wire lead to which you apply or from which you read the analog or digital signal. Analog signals can be single-ended or differential. F or digital signals, you group channels to form ports.
Glossary BNC-2140 User Manual G-4 © National Instruments Corporation D D/A digital-to-analog D AC digital-to-analog conv erter—an electronic de vice, often an integrated circuit, that con verts a d.
Glossary © National Instruments Corporation G-5 BNC-2140 User Manual DNL differential nonlinearity—a measure in lea s t s ig n i f ic a n t b i t of the worst-case de viation of code widths from th.
Glossary BNC-2140 User Manual G-6 © National Instruments Corporation I IC integrated circuit ICP Integrated Circuit Piezoelectric—identif ies products that operate using a constant current source and returns the output signal in the form of v oltage modulation on the same line as the constant current source.
Glossary © National Instruments Corporation G-7 BNC-2140 User Manual K k kilo—the standard metric prefix for 1,000, or 10 3 , used with units of measure such as volts, hertz, and meters K kilo—th.
Glossary BNC-2140 User Manual G-8 © National Instruments Corporation N NC normally closed, or n ot connected NIST National Institute of Standards and T echnology noise an undesirable electrical signa.
Glossary © National Instruments Corporation G-9 BNC-2140 User Manual peak to peak a measure of signal amplitude; the difference between the highest and lowest e xcursions of the signal pF pico farad—a farad is a unit used to measure capacitance ppm parts per million pts points R relati ve accurac y a measure in LSB of the accuracy of an ADC.
Glossary BNC-2140 User Manual G-10 © National Instruments Corporation Shannon Sampling Theorem a law of sampling theory stating that if a continuous bandwidth-limited signal contains no frequency com.
Glossary © National Instruments Corporation G-11 BNC-2140 User Manual V Vv o l t s V DC volts direct current V IH volts, input high V IL volts, input lo w V in volts in V OH volts, output high V OL v.
© National Instruments Corporation I-1 BNC-2140 User Manual Index Numbers +5 V signal, 68-pin connector signal descriptions (table), 3-4 A +A CH<0..3> signal 68-pin connector signal description s (table), 3-4 analog connector (table), 3-1 analog input signal connections, 3-5 –A CH<0.
Index BNC-2140 User Manual I-2 © National Instruments Corporation analog output signal connections, 3-5 DGND signal, 68-pin connector signal descriptions (table), 3-4 DIFF configuration analog input .
Index © National Instruments Corporation I-3 BNC-2140 User Manual signal connections, 3-1 to 3 -5 analog input, 3-5 analog output, 3-5 I/O connectors, 3-1 to 3-5 68-pin connector signal description s.
An important point after buying a device National Instruments BNC-2140 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought National Instruments BNC-2140 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data National Instruments BNC-2140 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, National Instruments BNC-2140 you will learn all the available features of the product, as well as information on its operation. The information that you get National Instruments BNC-2140 will certainly help you make a decision on the purchase.
If you already are a holder of National Instruments BNC-2140, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime National Instruments BNC-2140.
However, one of the most important roles played by the user manual is to help in solving problems with National Instruments BNC-2140. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device National Instruments BNC-2140 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
