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UM.book Page 2 Tuesday, July 14, 1998 10:37 AM Chapter 1 Introduction What You Need to Get Started To set up and use your BNC-2140 device, you will need the following: ❑ BNC-2140 ❑ One of the following DSA devices: PCI-4451 PCI-4452 NI 4551 NI 4552 ❑ BNC-2140 User Manual ❑ Your computer ❑ SHC68-C68-A1 analog cable Unpacking Your BNC-2140 is shipped in an antistatic plastic package to prevent electrostatic damage to the device. Several components on the device can be damaged by electrostatic
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UM.book Page 3 Tuesday, July 14, 1998 10:37 AM Chapter 1 Introduction If your application requires that you use a prepolarized microphone with a microphone preamplifier, contact Brüel and Kjær. Custom Cabling National Instruments offers cables of different lengths for the BNC-2140 accessory to connect your analog I/O signals to the DSA devices. National Instruments recommends that you not develop your own cabling solution due to the high-density connector that is required and the necessit
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UM.book Page 1 Tuesday, July 14, 1998 10:37 AM 2 Installation and Configuration This chapter explains how to install and configure your BNC-2140 accessory. Installation Note You must turn the power off to your computer before installing the BNC-2140. The following are general installation instructions. 1. Insert either end of your SHC68-C68-A1 analog cable into the 68-pin connector on the BNC-2140. Insert the other end into the 68-pin connector on the DSA plug-in device. 2. Tighten the ja
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UM.book Page 2 Tuesday, July 14, 1998 10:37 AM Chapter 2 Installation and Configuration ® Figure 2-1. Switch Settings and Signal Connections BNC-2140 User Manual 2-2 © National Instruments Corporation
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UM.book Page 1 Tuesday, July 14, 1998 10:37 AM 3 Signal Connections This chapter describes how to connect input and output signals to your BNC-2140. You can connect the external analog signals through six BNC connectors. Four BNC connectors are for input signals and two connectors are for output signals. The SHC68-C68-A1 shielded cable connects the BNC-2140 internal analog signal connector to the DSA plug-in device. A single 68-pin 0.8 mm VHDCI connector connects the analog I/O signals
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UM.book Page 2 Tuesday, July 14, 1998 10:37 AM Chapter 3 Signal Connections Table 3-1. BNC Analog I/O Connector Signal Descriptions (Continued) Signal Name Reference Direction Description +DAC1OUT –DAC1OUT Output +Analog Output Channel 1—This pin supplies the analog non-inverting output channel 1. This signal passes through the internal BNC conductor. –DAC1OUT +DAC1OUT Output –Analog Output Channel 1—This pin supplies the analog inverting output channel 1. This signal passes through the
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UM.book Page 3 Tuesday, July 14, 1998 10:37 AM Chapter 3 Signal Connections Figure 3-1 describes the pin connections on the BNC-2140 68-pin connector. 135 –ACH0 +ACH0 † AIGND 236 AIGND –ACH1 337 +ACH1 † AIGND 438 AIGND –ACH2 539 +ACH2 † AIGND 640 AIGND –ACH3 741 +ACH3 † AIGND 842 AIGND NC 943 NC NC 10 44 NC NC 11 45 NC NC 12 46 NC 13 47 NC NC 14 48 NC NC NC 15 49 NC NC 16 50 NC NC 17 51 NC NC 18 52 NC NC 19 53 NC NC 20 54 NC NC 21 55 NC NC 22 56 NC NC 23 57 NC NC 24 58 NC –DAC0OUT 25 59 +D
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UM.book Page 4 Tuesday, July 14, 1998 10:37 AM Chapter 3 Signal Connections 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. Table 3-2 shows the pin assignments for the internal 68-pin I/O connector. Table 3-2. 68-Pin Analog I/O Connector Signal Descriptions Signal Name Reference Direction Description AIGND — — Analog Input Groun
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UM.book Page 5 Tuesday, July 14, 1998 10:37 AM Chapter 3 Signal Connections 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. The outer shell is either the inverting differential signal in DIFF mode or is tethered to GND (0 V) through a 50 Ω, 1 W resistor in SE mode. Analog Input Signal Connections The analog input signals for the BNC-2140 device are +ACH<0..3> and –ACH<0..3>. Connecting of anal
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UM.book Page 1 Tuesday, July 14, 1998 10:37 AM 4 Theory of Operation This chapter contains a functional overview of the BNC-2140. © National Instruments Corporation 4-1 BNC-2140 User Manual
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UM.book Page 2 Tuesday, July 14, 1998 10:37 AM Chapter 4 Theory of Operation Functional Overview Figure 4-1 is a block diagram of the BNC-2140. 68-Pin Connector ICP Enable on/off ICP CH0 AICH0+ Isolated Power Supply AICH0 +5 V +30 V BNC 0 Connector AICH0– 50 Ω AIGND ICP Current DIFF/SE Source 0 ICP Enable on/off ICP CH3 AICH3+ Isolated Power Supply AICH3 +5 V +30 V BNC 3 Connector AICH3– 50 Ω AIGND ICP Current DIFF/SE Source 3 DAC0OUT+ DAC0OUT BNC Connector DAC0OUT– 50 Ω AOGND DIFF/SE DAC1OUT
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UM.book Page 3 Tuesday, July 14, 1998 10:37 AM Chapter 4 Theory of Operation Analog Input Circuitry The BNC-2140 has four identical analog input channels. A principal function of the BNC-2140 is to supply a constant current for ICP type accelerometers and microphone preamplifiers. Many accelerometers use piezoelectric materials to generate a charge that is proportional to the acceleration applied. Although these types of accelerometers have certain advantages, they are very suseptable to
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UM.book Page 1 Tuesday, July 14, 1998 10:37 AM
DAQ
BNC-2140 User Manual
Dynamic Signal Acquisition Signal Conditioning Accessory
BNC-2140 User Manual
June 1998 Edition
Part Number 321933B-01
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UM.book Page 2 Tuesday, July 14, 1998 10:37 AM Internet Support E-mail: support@natinst.com FTP Site: ftp.natinst.com Web Address: http://www.natinst.com Bulletin Board Support BBS United States: 512 794 5422 BBS United Kingdom: 01635 551422 BBS France: 01 48 65 15 59 Fax-on-Demand Support 512 418 1111 Telephone Support (USA) Tel: 512 795 8248 Fax: 512 794 5678 International Offices Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 288 3336, Canada (Ontario) 9
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UM.book Page 3 Tuesday, July 14, 1998 10:37 AM Important Information Warranty The BNC-2140 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 facto
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UM.book Page v Tuesday, July 14, 1998 10:37 AM Contents About This Manual Organization of This Manual.........................................................................................vii Conventions Used in This Manual.................................................................................viii Related Documentation..................................................................................................viii Customer Communication .......................................
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UM.book Page vi Tuesday, July 14, 1998 10:37 AM Contents Power Requirement (from DSA board) .......................................................... A-2 Physical ........................................................................................................... A-2 Environment.................................................................................................... A-2 Appendix B Customer Communication Glossary Index Figures Figure 2-1. Switch Settings and Signal Connectio
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UM.book Page vii Tuesday, July 14, 1998 10:37 AM About This Manual This manual describes the electrical and mechanical aspects of the BNC-2140 accessory and contains information concerning its operation. Organization of This Manual The BNC-2140 User Manual is organized as follows: • Chapter 1, Introduction, describes the BNC-2140 accessory, lists what you need to get started, explains how to unpack your BNC-2140, and describes optional equipment. • Chapter 2, Installation and Configuration
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UM.book Page viii Tuesday, July 14, 1998 10:37 AM About This Manual Conventions Used in This Manual The following conventions are used in this manual: <> Angle brackets containing numbers separated by an ellipsis represent a range of values associated with a bit or signal name—for example, DIO<3..0>. This icon to the left of bold italicized text denotes a note, which alerts you to important information. This icon to the left of bold italicized text denotes a caution, which advises ! you o
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UM.book Page 1 Tuesday, July 14, 1998 10:37 AM 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.The BNC-2140 is a signal conditioning accessory specifically designed for use with a dynamic signal acquisition (DSA) series device. It interfaces four BNC signal inputs and two BNC signal outputs directly to National Instr
