National Instruments BNC-2090 User Manual
  1. Manuals
  2. Brands
  3. National Instruments Manuals
  4. Accessories
  5. BNC-2090
  6. User manual
National Instruments BNC-2090 User Manual

National Instruments BNC-2090 User Manual

Rack-mount bnc accessory
Hide thumbs Also See for BNC-2090:
Table of Contents

Advertisement

Quick Links

BNC-2090 User Manual
Rack-Mount BNC Accessory
March 1996 Edition
Part Number 321183A-01
Copyright 1996 National Instruments Corporation. All Rights Reserved.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the BNC-2090 and is the answer not in the manual?

Questions and answers

Related Manuals for National Instruments BNC-2090

Summary of Contents for National Instruments BNC-2090

  • Page 1 BNC-2090 User Manual Rack-Mount BNC Accessory March 1996 Edition Part Number 321183A-01 Copyright 1996 National Instruments Corporation. All Rights Reserved.
  • Page 2 Internet Support GPIB: gpib.support@natinst.com DAQ: daq.support@natinst.com VXI: vxi.support@natinst.com LabVIEW: lv.support@natinst.com LabWindows: lw.support@natinst.com HiQ: hiq.support@natinst.com E-mail: info@natinst.com FTP Site: ftp.natinst.com Web Address: http://www.natinst.com Bulletin Board Support BBS United States: (512) 794-5422 or (800) 327-3077 BBS United Kingdom: 01635 551422 BBS France: 1 48 65 15 59...

  • Page 3: Important Information

    Important Information Warranty The BNC-2090 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.

  • Page 4: Table Of Contents

    Conventions Used in This Manual ................x Related Documentation ....................x Customer Communication ....................xi Chapter 1 Introduction About the BNC-2090 ....................1-1 What You Need to Get Started ..................1-1 Optional Equipment ......................1-2 Chapter 2 Configuration, Installation, and Signal Connection Configuring Your BNC-2090 ..................2-1 Mode Configuration ..................2-2...
  • Page 5 Table of Contents Chapter 3 Signal Conditioning Application Examples Adding Signal Conditioning Components ..............3-1 Soldering and Desoldering on the BNC-2090 ..........3-3 Analog Input ......................... 3-3 Building Lowpass Filters ................3-5 Building Highpass Filters ................3-6 Building Attenuators (Voltage Dividers) ............3-8 Analog Output ......................
  • Page 6 BNC-2090 Front-Panel Switch Configurations ........2-3 Figure 2-3. Accessing Jumper W1 ................2-5 Figure 2-4. Direct Connection of an MIO Board to the BNC-2090 ......2-8 Figure 2-5. Connection between the DAQ Board, the BNC-2090 and SC-20XX Boards ................2-9 Figure 2-6.

  • Page 7: Organization Of This Manual

    This Manual The BNC-2090 User Manual describes the features, functions, and operation of the BNC-2090 accessory. The BNC-2090 is a rack-mount analog breakout accessory with BNC-style connectors and spring-type terminal blocks. This accessory connects to the National Instruments MIO and PC-LPM-16 data acquisition (DAQ) boards for the IBM...

  • Page 8: Conventions Used In This Manual

    The following documents contain information that you may find helpful as you read this manual: • Your MIO or PC-LPM-16 board user manual • SC-205X Series User Manual • SC-206X Series User Manual • SC-207X Series User Manual BNC-2090 User Manual National Instruments Corporation...

  • Page 9: Customer Communication

    To make it easy for you to contact us, this manual contains comment and configuration forms for you to complete. These forms are in Appendix C, Customer Communication, at the end of this manual. National Instruments Corporation BNC-2090 User Manual...

  • Page 10: About The Bnc-2090

    You can use the BNC-2090 with a 50, 68, or 100-pin MIO DAQ board or a 50-pin PC-LPM-16 DAQ board. Refer to Appendix B, Using the PC-LPM-16, for information on using the PC-LPM-16 with the BNC-2090.

  • Page 11: Optional Equipment

    Chapter 1 Introduction Screwdrivers (Phillips and flathead) Four adhesive rubber feet (optional) Detailed specifications for the BNC-2090 are in Appendix A, Specifications. Optional Equipment You can also use the following National Instruments products with your BNC-2090, including cables, connector blocks, and other accessories: •...

  • Page 12: Configuring Your Bnc-2090

    Your BNC-2090 is factory-configured. However, you must reconfigure your accessory if you want to do any of the following: • Use your BNC-2090 with a MIO board configured for RSE or NRSE mode • Connect the BNC-2090 shield directly to digital ground (DGND) •...

  • Page 13: Mode Configuration

    Configuration, Installation, and Signal Connection Mode Configuration The BNC-2090 is factory-configured for use with the MIO board in the DIFF mode. Therefore, you must configure the BNC-2090 if you want to use the accessory with the MIO board in either RSE or NRSE mode.

  • Page 14: Power Selection Switch

    The BNC-2090 has a power switch on the rear panel, shown in Figure 2-1. If you use an MIO DAQ board, slide this switch to the MIO position. If you use a PC-LPM-16 DAQ board, slide this switch to the LPM-16 position.
  • Page 15 This is the factory-default setting. Digital Ground GND—Use this setting when the BNC-2090 metal case is neither connected to any other ground via a rack mount nor connected to the MIO ground via a shielded cable TO GND such as the SH6868.

  • Page 16: Signal Conditioning Jumpers

    Chapter 2 Configuration, Installation, and Signal Connection To access and reconfigure jumper W1, perform the steps below. Figure 2-3 shows the parts of the BNC-2090 you must remove. T I O 1 Front Panel 2 Rear Panel Screws 3 Side Panel Screw...

  • Page 17: Installing Your Bnc-2090

    BNC-2090, to select the DAQ board you are using (MIO or PC-LPM-16). 4. (Optional) You can mount the BNC-2090 into a 19 in. rack or place the accessory on a workbench near the host computer. If you do not...

  • Page 18: Accessory-To-Board Cabling

    50-pin MIO and PC-LPM-16* SH6850 or R6850 *When you are using the PC-LPM-16 board with the BNC-2090, some signal labels on the BNC-2090 front panel are invalid. Refer to Table B-1 for the valid signals and their function. Caution: Do not connect the BNC-2090 to any board other than a National Instruments MIO or PC-LPM-16 DAQ board, the SC-2070/72 board, or the SC-205X cable adapter board.

  • Page 19: Figure 2-4. Direct Connection Of An Mio Board To The Bnc-2090

    SH6850 or R6850 Cable or PC-LPM-16 BNC-2090 DAQ Board BNC-2090 SH100100 Cable 100-Pin MIO DAQ Board BNC-2090 SC-2056 Cable Adapter Board BNC-2090 BNC-2090 Figure 2-4. Direct Connection of an MIO Board to the BNC-2090 BNC-2090 User Manual National Instruments Corporation...

  • Page 20: Connecting Your Signals

    SH6850 or R6850 Cable 26-Pin Cable R6850 or SH1006868 Cable Figure 2-5. Connection between the DAQ Board, the BNC-2090 and SC-20 XX Boards Connecting Your Signals The BNC-2090 board has BNC connectors for all analog signals, spring terminal blocks for digital signals, and two user-defined connectors.

  • Page 21: Table 2-3. Bnc-2090 Front Panel Labels

    Chapter 2 Configuration, Installation, and Signal Connection Table 2-3. BNC-2090 Front Panel Labels (Continued) BNC-2090 Front Panel Labels Signal Description USER1 User-Defined 1 (Connected to USER1 Terminal Block) USER2 User-Defined 2 (Connected to USER2 Terminal Block) Terminal DIO<7..0> Digital Input/Output Channels 7 through 0...

  • Page 22: Connecting Analog Inputs

    The ground reference of a floating source must be tied to the ground of the DAQ board to establish a local or onboard reference for the signal.

  • Page 23: Se Inputs

    If the MIO board is configured for differential inputs, ground- referenced signal sources connected to the BNC-2090 need no special components added to the BNC-2090. You can leave the inputs of the BNC-2090 in the factory-default configuration, with the 0 jumpers in the two series positions, C and D (see Table 3-1).

  • Page 24: Connecting Analog Outputs

    Figure 2-7. Analog Output Schematic for DACs Connecting Digital I/O Signals Use the BNC-2090 BNC connectors and spring terminal blocks to connect your digital signals to your DAQ board. When connecting signals to the spring terminal blocks, you can use up to 20 AWG wire with the insulation stripped to 0.5 in.
  • Page 25 CTR1OUT. All of the digital signals from the MIO board are available at the front panel of the BNC-2090. Refer to your MIO board user manual for information on the use of these signals. If you want optical isolation of or relay control by the digital I/O lines, you must use the SC-2050 cable adapter board and the appropriate SC-206X Series digital signal conditioning board.

  • Page 26: Signal Conditioning Application Examples

    BNC-2090 in use with MIO boards. Adding Signal Conditioning Components The BNC-2090 has open-component positions in the input paths into which you can insert resistors and capacitors for conditioning the 16 single-ended or 8 differential analog input signals. You can also use the BNC-2090 in conjunction with other signal conditioning accessories.

  • Page 27: Figure 3-1. Disassembly Of The Bnc-2090

    8. Install and/or remove components as necessary. Refer to Soldering and Desoldering on the BNC-2090 for more information. 9. Reassemble the BNC-2090 in reverse order. When reassembling the two PWBs together, make sure that all the pins are aligned in the correct holes on the board-to-board connector.

  • Page 28: Soldering And Desoldering On The Bnc-2090

    The BNC-2090 is shipped with jumpers in the C and D positions (see Table 3-1 and Figure 3-2). Use vacuum-type tools when desoldering on the BNC-2090 and avoid damaging component pads. Use a low-wattage soldering iron (20 to 30 W) when soldering to the board.

  • Page 29: Figure 3-2. Onboard Equivalent Circuit For Diff Mode

    6, 14 7, 15 NRSE AISENSE COMMON AIGND DIFF CH 8 CH 0 AIGND Factory-Installed Jumpers ACH8 ACH0 (-IN) (+IN) To Input Multiplexer of MIO Board Figure 3-2. Onboard Equivalent Circuit for DIFF Mode BNC-2090 User Manual National Instruments Corporation...

  • Page 30: Building Lowpass Filters

    Chapter 3 Signal Conditioning Application Examples Building Lowpass Filters You can install simple, RC lowpass filters in the BNC-2090 on any differential input channel. The filters are useful for accurate measurement and noise rejection. By substituting resistance and capacitance values into the following formula (hereafter referred to as...

  • Page 31: Building Highpass Filters

    Figure 3-4. Lowpass Filter on Differential Channel 1 Building Highpass Filters You can install simple, RC highpass filters in the BNC-2090 on any differential input channel. The filters are useful for accurate high- frequency measurement and low-frequency noise rejection. By...

  • Page 32: Figure 3-5. Normalized Frequency Response Of Highpass Filter

    CMRR is degraded. If capacitors of 0.001 F are available, the resistance is (by substitution into Formula 3-1) about 6.4 k . Therefore, in this example, the input channel has a 6.34 k resistor (or National Instruments Corporation BNC-2090 User Manual...

  • Page 33: Building Attenuators (Voltage Dividers)

    You can connect attenuators to the analog inputs of the BNC-2090 when the inputs from its DAQ board are in DIFF mode. The BNC-2090 open component positions do not facilitate voltage dividers with the MIO board configured for single-ended input signals. Therefore, if you...

  • Page 34: Figure 3-7. Attenuator For Use With Differential Inputs

    DAQ board ( 10 V maximum). Warning: The BNC-2090 is not designed for any input voltages greater than 42 V, even if a user-installed voltage divider reduces the voltage to within the input range of the DAQ board.

  • Page 35: Analog Output

    Each analog output has two open-component positions for passive signal conditioning components. One is designated as a resistor and one is designated as a capacitor. Factory-default positions for the 0 jumpers are R17 and R18 as shown in Figure 3-8. BNC-2090 User Manual 3-10 National Instruments Corporation...

  • Page 36: Building Lowpass Filters

    Refer to Analog Input for more detailed information about lowpass filters and how to calculate values for lowpass filters. Refer to Figure 3-1 for component locations. Figure 3-9 shows a 4 Hz lowpass filter for DAC0OUT. National Instruments Corporation 3-11 BNC-2090 User Manual...

  • Page 37: Building Highpass Filters

    Figure 3-1 for component locations. Figure 3-10 shows a 50 kHz highpass filter for DAC0OUT. DAC0OUT R17 = .0005 f DAC0OUT C9 = 6.34 k BNC Connector AGND Figure 3-10. Highpass Filter on DAC0OUT BNC-2090 User Manual 3-12 National Instruments Corporation...

  • Page 38: Appendix A Specifications

    Appendix Specifications This appendix lists the specifications of the BNC-2090. Analog Input Input Characteristics Number of channels ......16 single-ended or 8 differential Field connection ........ 22 BNC connectors (18 analog, 2 digital, and 2 user-defined), 28 spring terminal blocks Signal conditioning capability ...
  • Page 39 Appendix A Specifications Environment Operating temperature......0 to 70 C Storage temperature ......-55 to 125 C Relative humidity.......5% to 90% noncondensing BNC-2090 User Manual National Instruments Corporation...

  • Page 40: Appendix B Using The Pc-Lpm-16

    This appendix contains information on using the PC-LPM-16 with the BNC-2090. When using the PC-LPM-16 with the BNC-2090, the functions of the front panel switches and connectors are different because of the difference between the MIO I/O connector signals and the PC-LPM-16 I/O connector signals.
  • Page 41 Appendix B Using the PC-LPM-16 Digital I/O Table B-1 shows the BNC-2090 front panel labels and the corresponding signal names when you use the accessory with a PC-LPM-16. Table B-1. BNC-2090 Front Panel Labels and Corresponding Signal Names for PC-LPM-16...
  • Page 42 Appendix B Using the PC-LPM-16 Table B-1. BNC-2090 Front Panel Labels and Corresponding Signal Names for PC-LPM-16 (Continued) BNC-2090 Front Panel Labels Signal Name for PC-LPM-16 DIO1 DIN5 DIO0 DIN3 DGND1 DOUT3 shorted to DIN2 USER1 No change EXSTRB* DOUT7...

  • Page 43: Table

    Appendix B Using the PC-LPM-16 Table B-1. BNC-2090 Front Panel Labels and Corresponding Signal Names for PC-LPM-16 (Continued) BNC-2090 Front Panel Labels Signal Name for PC-LPM-16 CTR1OUT OUT1 CTR0OUT +5 V BNC-2090 User Manual National Instruments Corporation...
  • Page 44 To access our FTP site, log on to our Internet host, ftp.natinst.com, as anonymous and use your Internet address, such as joesmith@anywhere.com, as your password. The support files and documents are located in the /support directories. National Instruments Corporation BNC-2090 User Manual...
  • Page 45 You can submit technical support questions to the appropriate applications engineering team through e-mail at the Internet addresses listed below. Remember to include your name, address, and phone number so we can contact you with solutions and suggestions. GPIB: LabVIEW: gpib.support@natinst.com lv.support@natinst.com DAQ: HiQ: daq.support@natinst.com hiq.support@natinst.com VXI: VISA: vxi.support@natinst.com visa.support@natinst.com...
  • Page 46 Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware, and use the completed copy of this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.
  • Page 47 BNC-2090 Hardware Configuration Form Record the settings and revisions of your hardware on the line to the right of each item. Complete a new copy of this form each time you revise your hardware configuration, and use this form as a reference for your current configuration.
  • Page 48 Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: BNC-2090 User Manual Edition Date: March 1996 Part Number: 321183A-01 Please comment on the completeness, clarity, and organization of the manual.
  • Page 49 AIGND analog input ground AISENSE analog input sense signal ANSI American National Standards Institute Celsius CMRR common-mode rejection ratio COMMON common signal CTROUT counter output signal National Instruments Corporation BNC-2090 User Manual...
  • Page 50 EXTSTRB external strobe signal farads FREQOUT frequency out signal gain ground signal hertz inches input/output light-emitting diode meters multifunction I/O NRSE nonreferenced single-ended input programmable function input resistance-capacitance referenced single-ended input signal conditioning BNC-2090 User Manual National Instruments Corporation...
  • Page 51 Glossary SCANCLK scan clock signal single-ended input switch TRIG trigger signal USER user-defined signal volts volts, direct current watts National Instruments Corporation BNC-2090 User Manual...
  • Page 52 SC-20XX board connection (figure), 2-9 (figure), 2-11 configuring your BNC-2090, 2-1 digital I/O signal connection, 2-13 mode configuration, 2-2 disassembly of the BNC-2090 (figure), 3-2 DIFF input mode, 2-2 RSE and NRSE input mode, 2-2 power selection switch, 2-3 National Instruments Corporation...
  • Page 53 3-11 general-purpose termination DAC0OUT (figure), 3-12 breadboards, 2-7 connected to MIO (figure), 2-8 connected to BNC-2090 (figure), 2-9 ground jumper, 2-3 MIO board, 2-1 setting options (table), 2-4 analog input, 3-3 ground-referenced signal sources, 2-12 analog output, 3-10...
  • Page 54 3-6 DIFF channel 1 (figure), 3-8 normalized frequency response parts location (figure), 2-1 (figure), 3-7 PC-LPM-16, using with the BNC-2090, B-1 building lowpass filters, 3-5 analog I/O, B-1 DIFF channel 1 (figure), 3-6 BNC-2090 switch configurations normalized frequency response...
  • Page 55 RSE and NRSE input mode, 2-2 terminal block labels (table), 2-10 voltage dividers, building, 3-8 DIFF inputs (figure), 3-9 W1 shield ground jumper, 2-3 setting options (table), 2-4 what you need to get started, 1-1 BNC-2090 User Manual I -4 National Instruments Corporation...

Table of Contents