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National Instruments 776572-00 User Manual

32-channel differential multiplexer/amplifier module for signal conditioning
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SCXI-1100
User Manual
32-Channel Differential Multiplexer/Amplifier Module for Signal Conditioning
October 1994 Edition
Part Number 320637C-01
© Copyright 1991, 1994 National Instruments Corporation.
All Rights Reserved.

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Summary of Contents for National Instruments 776572-00

  • Page 1 SCXI-1100 User Manual 32-Channel Differential Multiplexer/Amplifier Module for Signal Conditioning October 1994 Edition Part Number 320637C-01 © Copyright 1991, 1994 National Instruments Corporation. All Rights Reserved.
  • Page 2 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,...
  • Page 3 Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malfunctions, or service failures caused by owner's failure to follow the National Instruments installation, operation, or maintenance instructions;...
  • Page 4 Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used.

  • Page 5: Table Of Contents

    Terminal Block Temperature Sensor ........2-19 Terminal Block Jumper Configuration ........2-19 Terminal Block Signal Connection .......... 2-20 Terminal Block Installation ............ 2-20 Rear Signal Connector ..................2-22 Rear Signal Connector Signal Descriptions ......... 2-23 © National Instruments Corporation SCXI-1100 User Manual...
  • Page 6 Measurements from the SCXI-1100 via Another Module ..5-4 Scanning Measurements .................. 5-5 1. Data Acquisition Board Setup Programming........5-6 Counter 1 and SCANDIV ............5-7 2. Module Programming ..............5-8 Single-Module Multiplexed Scanning (Direct)......5-8 SCXI-1100 User Manual © National Instruments Corporation...
  • Page 7 SCXI-1180 Feedthrough Panel ..................E-8 SCXI-1180 Installation ..................E-8 SCXI-1302 50-Pin Terminal Block ................E-10 SCXI-1302 Wiring Procedure................E-10 SCXI-1302 Installation ..................E-11 SCXI-1351 One-Slot Cable Extender ................E-12 SCXI-1351 Installation ..................E-12 © National Instruments Corporation SCXI-1100 User Manual...
  • Page 8 SCXI-1343 Rear Screw Terminal Adapter ..............E-13 SCXI-1343 Installation ..................E-13 Appendix F Revision A and B Photo and Parts Locator Diagram ........... F-1 Appendix G Customer Communication ..................... G-1 Glossary ........................Glossary-1 Index ..........................Index-1 SCXI-1100 User Manual viii © National Instruments Corporation...
  • Page 9 SCXI-1180 Front Panel Installation..............E-10 Figure E-5. Cover Removal ....................E-11 Figure F-1. Revision A and B SCXI-1100 Signal Conditioning Module ......F-1 Figure F-2. Revision A and B SCXI-1100 Parts Locator Diagram ........F-2 © National Instruments Corporation SCXI-1100 User Manual...
  • Page 10 Table E-1. SCXI-1100 and MIO Board Pinout Equivalences ........... E-2 Table E-2. SCXI-1341 and SCXI-1344 Pin Translations ..........E-4 Table E-3. SCXI-1342 Pin Translations ................E-5 Table E-4. SCXI-1343 Pin Connections ................E-14 SCXI-1100 User Manual © National Instruments Corporation...

  • Page 11: About This Manual

    The SCXI-1100 operates as a 32-channel differential input multiplexer with an onboard software-programmable gain instrumentation amplifier (PGIA). The SCXI-1100 is a member of the National Instruments Signal Conditioning eXtensions for Instrumentation (SCXI) Series modules for the National Instruments data acquisition plug-in boards.

  • Page 12: Conventions Used In This Manual

    Revision A and B SCXI-1100 and the parts locator diagram. • Appendix G, Customer Communication, contains forms you can use to request help from National Instruments or to comment on our products and manuals. • The Glossary contains an alphabetical list and description of terms used in this manual, including abbreviations, acronyms, metric prefixes, mnemonics, and symbols.

  • Page 13: Related Documentation

    SCXI-1000/1001 User Manual (part number 320423-01) 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 complete.

  • Page 14: Chapter 1 Introduction

    With the SCXI-1100 module, the SCXI chassis can serve as a fast-scanning signal conditioner for laboratory testing, production testing, and industrial-process monitoring. What Your Kit Should Contain The contents of the SCXI-1100 kit (part number 776572-00) are listed as follows. Kit Component Part Number...

  • Page 15: Optional Software

    NI-DAQ maintains a consistent software interface among its different versions so you can switch between platforms with minimal modifications to your code. The National Instruments PC, AT, and MC data acquisition boards are packaged with NI-DAQ software for DOS/Windows/LabWindows. NI-DAQ software for DOS/Windows/LabWindows comes with language interfaces for Professional BASIC, Turbo Pascal, Turbo C, Turbo C++, Borland C++, and Microsoft C for DOS;...

  • Page 16: Optional Equipment

    NB6 cable 0.5 m 181305-01 1.0 m 181305-10 Refer to the Signal Connections section in Chapter 2, Configuration and Installation, and to Appendix E, SCXI-1100 Cabling, for additional information on cabling, connectors, and adapters. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 17: Custom Cables

    AMP Inc. (part number 1-103310-0) The mating connector for the SCXI-1100 rear signal connector is a 50-position polarized ribbon- socket connector with strain relief. National Instruments uses a polarized or keyed connector to prevent inadvertent upside-down connection to the SCXI-1100. Recommended manufacturer part numbers for this mating connector are as follows: •...

  • Page 18: Configuration And Installation

    Revision C and later SCXI-1100 modules contain 10 jumpers that are shown in the parts locator diagram in Figure 2-1. For the Revision A and B parts locator diagram, see Appendix F, Revision A and B Photo and Parts Locator Diagram. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 20: Digital Signal Connections

    Chapter 4, Register Descriptions, for information on reading the Module ID Register. See Appendix E, SCXI-1100 Cabling, for the pin equivalences of the SCXI-1100 rear signal connector and the data acquisition board I/O connector. This position is marked on the module. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 21: Jumper W9

    INTR* line. On Revision A and B modules, position A connects, after buffering, SLOT0SEL* to the SCXIbus INTR* line. Do not change the factory setting, position A. In this setting, the data SCXI-1100 User Manual © National Instruments Corporation...

  • Page 22: Analog Configuration

    Analog Configuration The SCXI-1100 has seven analog configuration jumpers–W10, W7, W8, W1, W2, W3, and W4. Use these jumpers to configure the output mode, reference mode, filter selection, and amplifier output selection. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 23: Grounding, Shielding, And Output Mode Selection

    When using the SCXI-1100 with data acquisition boards such as the MIO boards, use the Differential Input mode configuration to eliminate ground problems. With single-ended data SCXI-1100 User Manual © National Instruments Corporation...

  • Page 24: Reference Mode Selection

    When you connect jumper W2, the SCXI-1100 does not filter. • When you connect jumper W3, a 10 kHz lowpass filter filters the conditioned signal. • When you connect jumper W4, a 4 Hz lowpass filter filters the conditioned signal. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 25: Output Selection

    Use this setting if you do not need the amplifier output at the front connector. Refer to the Analog Output section later in this chapter for more information. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 26: Input Filtering And Current Loop Receivers

    In addition, pads are available for transforming individual channels to current-to-voltage converters. National Instruments manufactures an SCXI process-current pack, which consists of a package of four 249 Ω, 0.1%, 5 ppm/°C, 1/4 W resistors. The part number for this kit is in the Optional Equipment section of Chapter 1, Introduction.

  • Page 27: Hardware Installation

    1. Turn off the computer that contains the data acquisition board or disconnect the data acquisition board from your SCXI chassis. 2. Turn off the SCXI chassis. Do not insert the SCXI-1100 into a chassis that is turned on. SCXI-1100 User Manual 2-10 © National Instruments Corporation...

  • Page 28: Signal Connections

    SCXI-1100 can damage the SCXI-1100 module and the SCXIbus backplane. Maximum input ratings for each signal are given in this chapter under the discussion of that signal. National Instruments is not liable for any damages resulting from signal connections that exceed these ratings.

  • Page 29: Figure 2-2. Scxi-1100 Front Connector Pin Assignment

    CH24- CH24+ OUTPUT CH25- CH25+ AOREF CH26- CH26+ GUARD CH27- CH27+ CGND CH28- CH28+ DTEMP CH29- CH29+ MTEMP CH30- CH30+ CGND CH31- CH31+ +5 V Figure 2-2. SCXI-1100 Front Connector Pin Assignment SCXI-1100 User Manual 2-12 © National Instruments Corporation...

  • Page 30: Front Connector Signal Descriptions

    Figure 2-3 illustrates how to connect a ground-referenced signal. Figure 2-4 illustrates how to connect a floating signal. Figure 2-5 shows how to connect AC-coupled signals. © National Instruments Corporation 2-13 SCXI-1100 User Manual...

  • Page 31: Figure 2-3. Ground-Referenced Signal Connection

    • • • • • Figure 2-3. Ground-Referenced Signal Connection PGIA – – – (Position 2-3) • • • 100 kΩ • • • • • • Figure 2-4. Floating Signal Connection SCXI-1100 User Manual 2-14 © National Instruments Corporation...

  • Page 32: Figure 2-5. Ac-Coupled Signal Connection

    SCXI-1100. The common-mode input range of the SCXI-1100 PGIA is the magnitude of the greatest common-mode signal that the SCXI-1100 can reject. The PGIA can reject common-mode © National Instruments Corporation 2-15 SCXI-1100 User Manual...

  • Page 33: Thermocouple Connections

    Warning: Exceeding the differential and common-mode input ranges results in distorted input signals. Exceeding the maximum input voltage rating between any two terminals can damage the SCXI-1100, the SCXIbus backplane, and the data acquisition board. National Instruments is not liable for any damages resulting from such signal connections. Thermocouple Connections One of the main applications of the SCXI-1100 is thermocouple measurements.

  • Page 34: Open Thermocouple Detection

    4. Slide the module out of the chassis. 5. Remove the module cover. Refer to Figure 2-6 as you complete the remaining steps. 6. Place one jack screw as indicated in Figure 2-6. © National Instruments Corporation 2-17 SCXI-1100 User Manual...

  • Page 35: Figure 2-6. Assembling And Mounting The Connector-And-Shell Assembly

    12. Connect the connector-and-shell assembly to your module front connector and secure the assembly by tightening both mounting screws. Shell Assembly Mounting Screw Connector Jack Screws SCXI-1100 Module Lock Washers Shell Assembly Grounding Screw Mounting Screw Figure 2-6. Assembling and Mounting the Connector-and-Shell Assembly SCXI-1100 User Manual 2-18 © National Instruments Corporation...

  • Page 36: Scxi-1300 Terminal Block

    The parking position for the jumper block is in the MTEMP position. The temperature sensor is disabled until the RTEMP bit in the Configuration Register selects the sensor. Table 2-8 shows the SCXI-1300 jumper settings. © National Instruments Corporation 2-19 SCXI-1100 User Manual...

  • Page 37: Terminal Block Signal Connection

    2. Make sure that the SCXI-1100 top and bottom thumbscrews do not obstruct the rear panel of the terminal block. 3. Tighten the top and bottom screws on the back of the terminal block to hold it securely in place. SCXI-1100 User Manual 2-20 © National Instruments Corporation...

  • Page 39: Rear Signal Connector

    Chapter 2 Rear Signal Connector Note: If you will be using the SCXI-1100 with a National Instruments data acquisition board and cable assembly, you do not need to read the remainder of this chapter. If you will also be using the SCXI-1180 feedthrough panel, the SCXI-1343 rear screw terminal adapter, or the SCXI-1351 one-slot cable extender with the SCXI-1100, you should read this section.

  • Page 40: Rear Signal Connector Signal Descriptions

    The signals on the rear signal connector are analog output signals, digital I/O signals, or timing I/O signals. Signal connection guidelines for each of these groups are given in the following section. © National Instruments Corporation 2-23 SCXI-1100 User Manual...

  • Page 41: Analog Output Signal Connections

    Warning: The SCXI-1100 analog outputs are not overvoltage protected. Applying external voltage to these outputs can damage the SCXI-1100. National Instruments is not liable for any damages resulting from such signal connections. Digital I/O Signal Connections Pins 24 through 27, 29, 33, 36, 37, and 43 constitute the digital I/O lines of the rear signal connector.

  • Page 42: Table 2-9. Scxibus To Scxi-1100 Rear Signal Connector To Data Acquisition Board Pin Equivalences

    Digital output specifications (referenced to DIG GND): output logic high voltage 3.7 V minimum at 4 mA maximum output logic low voltage 0.4 V maximum at 4 mA maximum © National Instruments Corporation 2-25 SCXI-1100 User Manual...

  • Page 43: Timing Requirements And Communication Protocol

    Slot 11 in Chassis 9. Notice that the factory-default chassis address for the SCXI-1000 is address 0. For information on changing the address of your chassis, consult the SCXI-1000/1001 User Manual. An SCXI-1000 chassis responds to any chassis number. SCXI-1100 User Manual 2-26 © National Instruments Corporation...

  • Page 44: Figure 2-10. Slot-Select Timing Diagram

    Slot-Select Register to ensure that no accidental writes occur. Figure 2-11 shows the timing requirements on the SERCLK and SERDATIN signals. You must observe these timing requirements for all communications. T is a specification of the delay SCXI-1100. © National Instruments Corporation 2-27 SCXI-1100 User Manual...

  • Page 45: Figure 2-11. Serial Data Timing Diagram

    4. If you are not selecting another slot, write zero to the Slot 0 Slot-Select Register. Figure 2-12 illustrates a write to the SCXI-1100 Configuration Register of the binary pattern: 00010010 10011111 00000111 SCXI-1100 User Manual 2-28 © National Instruments Corporation...

  • Page 46: Figure 2-12. Configuration Register Write Timing Diagram

    3 = 0 SS* high to SERDATOUT high 350 nsec maximum delay Figure 2-13. SCXI-1100 Module ID Register Timing Diagram For further details on programming these signals, refer to Chapter 5, Programming. © National Instruments Corporation 2-29 SCXI-1100 User Manual...

  • Page 47: Chapter 3 Theory Of Operation

    The block diagram in Figure 3-1 illustrates the key functional components of the SCXI-1100. Figure 3-2 shows the detailed block diagram. SCXIbus Digital Interface Control Analog Analog Input Output Stage Timing Figure 3-1. SCXI-1100 Block Diagram © National Instruments Corporation SCXI-1100 User Manual...

  • Page 48: Figure 3-2. Scxi-1100 Detailed Block Diagram

    Theory of Operation Chapter 3 Figure 3-2. SCXI-1100 Detailed Block Diagram SCXI-1100 User Manual © National Instruments Corporation...

  • Page 49: Scxibus Connector

    MUXCOUNTER clock selection, calibration, and auto- zeroing. The theory of operation for each of these components is explained in the remainder of this chapter. SCXIbus Connector Figure 3-3 shows the pinout of the SCXIbus connector. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 50: Figure 3-3. Scxibus Connector Pin Assignment

    GUARD GUARD GUARD AB2- AB2+ CHSGND CHSGND CHSGND CHSGND CHSGND RSVD INTR* RESET* MISO D*/A CHSGND CHSGND CHSGND CHSGND +5 V +5 V MOSI SPICLK TRIG0 SCANCON Figure 3-3. SCXIbus Connector Pin Assignment SCXI-1100 User Manual © National Instruments Corporation...

  • Page 51: Scxibus Connector Signal Descriptions

    Negative Analog Supply – -18.5 V to -25 V. A22, B22, C22 V+ Positive Analog Supply – +18.5 V to +25 V. A23, D23 +5 V +5 VDC Source – Digital power supply. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 52: Table 3-1. Scxibus Equivalents For The Rear Signal Connector

    SS* for that slot. This is done by asserting INTR* low, writing a 16-bit number over MOSI corresponding to the desired slot (and chassis if you are using an SCXI-1001 SCXI-1100 User Manual © National Instruments Corporation...

  • Page 53: Digital Interface Circuitry

    The digital interface circuitry is divided into a data acquisition section and an SCXIbus section. The SCXI-1100 connects to the SCXIbus via a 4x24 metral receptacle and to the data acquisition board via a 50-pin ribbon-cable header. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 54: Digital Control Circuitry

    3. The serial data becomes available on MOSI. SPICLK clocks the data into the register. 4. Drive SS* high and D*/A high to indicate an end of communication. This latches the Configuration Register bits. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 55: Analog And Timing Circuitry

    The data acquisition board analog input and timing is the interface between the SCXI-1100 output and the data acquisition board. This interface is described in the following section. Analog Input and Timing Circuits Figure 3-6 diagrams the SCXI-1100 analog input and timing circuitry. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 56: Figure 3-6. Analog Input And Timing Block Diagram

    The input multiplexer consists of eight CMOS analog input multiplexers and has 32 differential analog input channels. Input channels and multiplexers correspond as shown in Table 3-2. SCXI-1100 User Manual 3-10 © National Instruments Corporation...

  • Page 57: Table 3-2. Multiplexer/Input Channel Correspondence

    You can determine the -3 dB point of these filters from the following equation: = 1/(4πR is equal to 820 Ω ±2% and C is the capacitor you installed. where R © National Instruments Corporation 3-11 SCXI-1100 User Manual...

  • Page 58: Calibration

    You can transform a given channel into a current-loop receiver by placing an appropriate resistor into these pads. You can purchase SCXI process-current packs (resistor kits) separately from National Instruments. Refer to Chapter 2, Configuration and Installation, for detailed installations of these capacitors and resistors.

  • Page 59: Analog Output Circuitry

    Figure 3-8. Analog Output Circuitry The SCXI-1100 output circuitry consists of an output multiplexer that multiplexes the PGIA output and the temperature sensor reading on the MTEMP line. To read the temperature sensor © National Instruments Corporation 3-13 SCXI-1100 User Manual...

  • Page 60: Scanning Modes

    For additional information, consult either Chapter 2, Configuration and Installation, Chapter 5, Programming, your data acquisition board user manual, or the SCXI chassis user manual. If you need more information, contact National Instruments. During scanning, a module sends the SCANCLK signal to Slot 0 over the TRIG0 backplane line, and Slot 0 sends the SCANCON signal to the modules.

  • Page 61: Single-Module Multiplexed Scanning (Indirect)

    TRIG0 for the other modules and Slot 0, as shown in Figure 3-11. Program the scan list in Slot 0 with the sequence of modules and the number of samples per entry. © National Instruments Corporation 3-15 SCXI-1100 User Manual...

  • Page 62: Figure 3-11. Multiple-Module Multiplexed Scanning

    Data Acquisition Board Cable Adapter Adapter Adapter Cable Assembly Assembly Input Ch. N Input Ch. 1 Input Ch. 0 Timing Output Cable Assemblies Chassis 1 Chassis 2 Chassis N Figure 3-12. Multiple-Chassis Scanning SCXI-1100 User Manual 3-16 © National Instruments Corporation...

  • Page 63: Register Descriptions

    The SCXI-1100 has two registers. The Module ID Register is a 4-byte read-only register that contains the Module ID number of the SCXI-1100. The Configuration Register is a 24-bit write- only register that controls the functions and characteristics of the SCXI-1100. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 64: Module Id Register

    Register is reinitialized to its original value each time the SCXI-1100 is deselected by the SS* signal on the backplane. Type: Read-only Word Size: Four-byte Bit Map: Byte 0 Byte 1 Byte 2 Byte 3 SCXI-1100 User Manual © National Instruments Corporation...

  • Page 65: Configuration Register

    SCXI-1100 saturates. The following table describes the amplifier gains: Bit 17 Bit 16 First-Stage Gain not valid (open loop) © National Instruments Corporation SCXI-1100 User Manual...
  • Page 66 1, determines whether the PGIA inputs are grounded or connected to Analog Bus 2. When CV/ZERO* is cleared to 0, the PGIA inputs are grounded. When CV/ZERO* is set to 1, the PGIA inputs are connected to Analog Bus 2. SCXI-1100 User Manual © National Instruments Corporation...
  • Page 67 If the PGIA or MTEMP is driving the output buffer, FOUTEN* drives Analog Bus 0 if AB0EN is set. If nothing is driving the output buffer, the SCXI-1100 output saturates. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 68: Slot 0 Register Descriptions

    Slot-Select Register exists in a system composed of multiple chassis. The HSCR and FIFO Register, on the other hand, are unique to each chassis, and you must program them separately. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 69: Slot-Select Register

    Chassis Bit 4 through 0 – Determine which chassis is selected. On the SCXI-1000 chassis, these bits are don't cares. SL<3..0> Slot Bit 3 through 0 – Determine which slot in the selected chassis is selected. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 70: Hardscan Control Register (Hscr)

    SCANCON lines. When cleared to 0, all SCANCON lines are disabled (high). CLKEN Clock Enable – When set to 1, enables TRIG0 as a clock for the hardscan circuitry. When cleared to 0, TRIG0 is disabled. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 71: Fifo Register

    Count – The value of these bits plus one determines how many samples are taken before the next scan list entry becomes active. A value of zero corresponds to one sample and a value of 127 corresponds to 128 samples. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 72: Chapter 5 Programming

    For timing specifics, refer to the Communication Timing Requirements section in Chapter 2, Configuration and Installation. Table 5-1 gives the rear signal connector pin equivalences to the different National Instruments data acquisition boards. Also see Appendix E, SCXI-1100 Cabling. The Configuration Register, the HSCR, and the FIFO Register are write-only registers.

  • Page 73: Register Selection And Write Procedure

    Clear SERCLK to 0. c. Set SERCLK to 1 (clock the data). (If you are using an MIO board, writing to the EXTSTROBE* register pulses EXTSTROBE* low and then high, accomplishing steps 6b and 6c.) SCXI-1100 User Manual © National Instruments Corporation...

  • Page 74: Initialization

    To measure the voltage on the MTEMP line, perform the following steps: 1. Write the binary pattern XXX00000 00XXXXXX 00101000 to the SCXI-1100 Configuration Register. 2. Measure the voltage with the data acquisition board. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 75: Indirect Measurements

    2. Program the other module not to drive Analog Bus 0, but to send Analog Bus 0 to the data acquisition board. 3. Write the binary pattern XXXGGGGG 00XCCCCC 00001010 to the SCXI-1100 Configuration Register. 4. Measure the voltage with the data acquisition board. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 76: Scanning Measurements

    4. Enable the data acquisition, trigger it either through software or hardware, and service the data acquisition. You can only channel scan with MIO boards. The Lab boards and the PC-LPM-16 board do not support channel scanning. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 77: Data Acquisition Board Setup Programming

    Multiple A/D Conversions with Interval Channel Scanning (Pseudo-Simultaneous) • NB-MIO-16X User Manual Multiple A/D Conversions with Continuous Channel Scanning (Round Robin) Multiple A/D Conversions with Interval Channel Scanning (Pseudo-Simultaneous) • NB-MIO-16 User Manual Programming Multiple A/D Conversions with Channel Scanning SCXI-1100 User Manual © National Instruments Corporation...

  • Page 78: Counter 1 And Scandiv

    1. Write FF01 to the Am9513 Command Register to select Counter 1 Mode Register. 2. Write 0325 (hex) to the Am9513 Data Register to store Counter 1 Mode Value for most MIO boards. For the AT-MIO-16F-5, the AT-MIO-16X, and the AT-MIO-64F-5, write 1325 (hex). © National Instruments Corporation SCXI-1100 User Manual...

  • Page 79: Module Programming

    Analog Bus 0 to the data acquisition board. The other module must also be able to SCXI-1100 User Manual © National Instruments Corporation...

  • Page 80: Multiple-Module Multiplexed Scanning

    You can use the MIO boards, along with the SCXI-1350 multichassis adapter, for multiple-chassis scanning. For each chassis, program the modules according to the appropriate mode of operation, disregarding the fact that other chassis are involved. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 81: Programming The Slot 0 Hardscan Circuitry

    S = 0 if you want the scanning to repeat when the end of the list is reached. S = 1 if you want the circuitry to shut down after a single scan. SCXI-1100 User Manual 5-10 © National Instruments Corporation...

  • Page 82: Acquisition Enable, Triggering, And Servicing

    Programming section of this chapter. 2. Performing the procedure given in the Register Writes section earlier in this chapter, write 00000000 10000011 00000101 to the Configuration Register of the SCXI-1100 in Slot 1. © National Instruments Corporation 5-11 SCXI-1100 User Manual...
  • Page 83 Make sure to toggle SLOT0SEL* or reselect the FIFO Register from scratch between steps 6a, 6b, and 6c. 7. Perform the procedure given in the 4. Acquisition Enable, Triggering, and Servicing section earlier in this chapter. SCXI-1100 User Manual 5-12 © National Instruments Corporation...
  • Page 84 Write XXXXX101 00000110 over MOSI. Toggle SLOT0SEL*. 10. Write XXXXX110 00011100 over MOSI. 11. Select Slot 13 in Chassis 3. 12. Write XXXXX110 00100110 over MOSI. 13. Toggle SLOT0SEL*. 14. Write XXXXX001 00000010 over MOSI. © National Instruments Corporation 5-13 SCXI-1100 User Manual...
  • Page 85 Programming Chapter 5 15. Toggle SLOT0SEL*. 16. Write XXXXX011 10011001 over MOSI. 17. Select Slot 0 in Chassis 0. SCXI-1100 User Manual 5-14 © National Instruments Corporation...

  • Page 86: Appendix A Specifications

    0.006% 0.4 s 200 µs 0.0015% 0.5 s Includes both common-mode voltage and differential voltage Combined settling time of the SCXI-1100 and the AT-MIO-16F-5 Combined settling time of the SCXI-1100 and the AT-MIO-16X © National Instruments Corporation SCXI-1100 User Manual...

  • Page 87: Explanation Of Analog Input Specifications

    4.5 W Explanation of Analog Input Specifications Analog input range is the common and differential mode voltages that can be applied on the PGIA inputs without resulting in excessive distortion at the output. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 88: Physical

    Operating Environment Temperature 0° to 50° C Relative humidity 5% to 90% at 35° C Storage Environment Temperature -55° to 150° C Relative humidity 5% to 90% noncondensing Located on the SCXI-1300 terminal block © National Instruments Corporation SCXI-1100 User Manual...

  • Page 89: Appendix B Rear Signal Connector

    31 32 DIG GND 33 34 35 36 SCANCLK SERCLK 37 38 39 40 41 42 RSVD 43 44 45 46 47 48 49 50 Figure B-1. SCXI-1100 Rear Signal Connector Pin Assignment © National Instruments Corporation SCXI-1100 User Manual...

  • Page 90: Rear Signal Connector Signal Descriptions

    All other pins are not connected. See the Timing Requirements and Communication Protocol section in Chapter 2, Configuration and Installation, for more detailed information on timing. Detailed signal specifications are also included in Chapter 2. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 91: Appendix Cscxibus Connector

    Appendix C SCXIbus Connector This appendix describes the pinout and signal names for the SCXI-1100 96-pin SCXIbus connector, including a description of each connection. Figure C-1 shows pinout of the SCXI-1100 SCXIbus connector. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 92: Figure C-1. Scxibus Connector Pin Assignment

    GUARD GUARD GUARD AB2- AB2+ CHSGND CHSGND CHSGND CHSGND CHSGND RSVD RESET* INTR* D*/A MISO CHSGND CHSGND CHSGND CHSGND +5 V +5 V MOSI SPICLK TRIG0 SCANCON Figure C-1. SCXIbus Connector Pin Assignment SCXI-1100 User Manual © National Instruments Corporation...

  • Page 93: Scxibus Connector Signal Descriptions

    Negative Analog Supply – -18.5 V to -25 V. A22, B22, C22 V+ Positive Analog Supply – +18.5 V to +25 V. A23, D23 +5 V +5 VDC Source – Digital power supply. © National Instruments Corporation SCXI-1100 User Manual...
  • Page 94 Scanning Control – Combination output enable and reload signal for scanning operations. Totem pole. Input. * Indicates active low All other pins are not connected. Further information is given in Chapter 3, Theory of Operation. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 95: Scxi-1100 Front Connector

    CH23+ CH24- CH24+ OUTPUT CH25- CH25+ AOREF CH26- CH26+ GUARD CH27- CH27+ CGND CH28- CH28+ DTEMP CH29- CH29+ MTEMP CH30- CH30+ CGND CH31- CH31+ +5 V Figure D-1. SCXI-1100 Front Connector Pin Assignment © National Instruments Corporation SCXI-1100 User Manual...

  • Page 96: Front Connector Signal Descriptions

    Negative Input Channels – Negative input channels to the PGIA. C1-C32 CH31+ through CH0+ Positive Input Channels – Positive input channels to the PGIA. Further information is given in Chapter 2, Configuration and Installation. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 97: Appendix Escxi-1100 Cabling

    The SCXI-1340 includes a mounting bracket that mounts to the chassis so that you can remove and reinsert the module without explicitly removing the cable from the back of the chassis. This is especially useful when the SCXI chassis is rack mounted, making rear access difficult. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 98: Scxi-1340 Installation

    4. Screw the mounting bracket to the threaded strips in the rear of the chassis. 5. Connect the loose end of the cable assembly to the MIO board I/O connector. Check the installation. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 99: Scxi-1341 Lab-Nb, Lab-Pc, Or Lab-Pc+ And Scxi-1344 Lab-Lc Cable Assemblies

    Leave jumper W1 in position A on the SCXI-1341 and SCXI-1344. The SCXI-1100 does not use jumper W1. Table E-2 lists the SCXI-1341 and SCXI-1344 pin translations. Note: If you are using the Lab-PC+, configure the board for single-ended inputs. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 100: Scxi-1341 And Scxi-1344 Installation

    Lab-PC+ I/O connector. For an SCXI-1344, connect the two 26-pin connectors to the Lab-LC board according to the instructions given in the Installation section of Chapter 2, Configuration and Installation, of the Lab-LC User Manual. Check the installation. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 101: Scxi-1342 Pc-Lpm-16 Cable Assembly

    No Connect DOUT4 SERDATIN DOUT5 DAQD*/A DOUT6 SLOT0SEL* DOUT7 SERCLK OUT2 No Connect +5 V 34-35 No Connect All other pins of the PC-LPM-16 pinout are not sent to the SCXI-1100 rear signal connector. © National Instruments Corporation SCXI-1100 User Manual...

  • Page 102: Scxi-1342 Installation

    SCXI-1351 and NB5 Cable Installation Perform the following steps to install the SCXI-1351: 1. Make sure that the computer and the SCXI chassis are turned off. 2. Install the SCXI module in the chassis. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 103: Figure E-2. Nb5 Cable And Scxi-1351 Installation

    Step 5 50-Pin Female Connector to Next Slot Step 4 Step 3 NB5 Cable Positions SCXI-1100 Rear 1 through 50 Male Breakout Signal Connector Connector Mounting Bracket Figure E-2. NB5 Cable and SCXI-1351 Installation © National Instruments Corporation SCXI-1100 User Manual...

  • Page 104: Scxi-1180 Feedthrough Panel

    3. Thread the rear connector through the front of the chassis to the rear of the chassis. Attach the rear connector to the breakout connector of the adjacent cable assembly or slot extender, as shown in Figure E-3. SCXI-1100 User Manual © National Instruments Corporation...

  • Page 105: Figure E-3. Scxi-1180 Rear Connections

    If you are using the SCXI-1180 with an SCXI-1351 and an NB5 cable, connect the SCXI-1180 breakout connector to the female connector on the SCXI-1351. Place the SCXI-1180 to the left of the SCXI-1351 (looking at the front of the chassis). © National Instruments Corporation SCXI-1100 User Manual...

  • Page 106: Scxi-1302 50-Pin Terminal Block

    1. Unscrew the rear grounding screw on the back of the terminal block, as shown in Figure E-5. 2. With a flathead screwdriver, carefully pry the cover off the terminal block. 3. Insert each wire through the terminal block strain relief. SCXI-1100 User Manual E-10 © National Instruments Corporation...

  • Page 107: Scxi-1302 Installation

    4. Tighten the top and bottom captive screws on the back of the terminal block into the screw holes in the front panel to hold the SCXI-1302 securely in place. Check the installation. © National Instruments Corporation E-11 SCXI-1100 User Manual...

  • Page 108: Scxi-1351 One-Slot Cable Extender

    The adapter takes channel 0 from the front connector and sends it to channel 0 of the rear connector. The adapter also takes channels 0 through 6 on the chassis extender connector and maps them to channels 1 through 7, respectively, on the rear connector. SCXI-1100 User Manual E-12 © National Instruments Corporation...

  • Page 109: Scxi-1350 Installation

    5. Plug the adapter board front connector to the module rear signal connector. Make sure the corner of the adapter board enters the upper board guide of the chassis. 6. Screw the rear panel to the threaded strips in the rear of the chassis. © National Instruments Corporation E-13 SCXI-1100 User Manual...

  • Page 110: Table E-4. Scxi-1343 Pin Connections

    Solder pad RSVD Solder pad No Connect Solder pad No Connect Solder pad No Connect Solder pad No Connect Solder pad No Connect Solder pad No Connect Solder pad No Connect Solder pad SCXI-1100 User Manual E-14 © National Instruments Corporation...

  • Page 111: Revision A And B Photo And Parts Locator Diagram

    This appendix contains a photograph of the Revision A and B SCXI-1100 and the parts locator diagram. Figure F-1 shows the Revision A and B SCXI-1100. Figure F-2 shows the parts locator diagram. Figure F-1. Revision A and B SCXI-1100 Signal Conditioning Module © National Instruments Corporation SCXI-1100 User Manual...

  • Page 113: Customer Communication

    Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster. National Instruments provides comprehensive technical assistance around the world. In the U.S. and Canada, applications engineers are available Monday through Friday from 8:00 a.m. to 6:00 p.m.
  • Page 114 National Instruments for technical support helps our applications engineers answer your questions more efficiently. If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Include additional pages if necessary.
  • Page 115 Record the settings and revisions of your hardware on the line located to the right of each item. In addition, fill out the hardware and software configuration forms for the SCXI chassis and data acquisition board. Completing these forms accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.
  • Page 116 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: SCXI-1100 User Manual Edition Date: October 1994 Part Number: 320637C-01 Please comment on the completeness, clarity, and organization of the manual.
  • Page 117 (warning), 2-16 custom cables, 1-4 floating signal connection, 2-14 SCXI-1180 feedthrough panel ground-referenced signal description of, E-8 connection, 2-14 front panel installation, E-10 signal connections, 2-13 to 2-16 installation, E-8 to E-9 © National Instruments Corporation Index-1 SCXI-1100 User Manual...
  • Page 118 A-2 CLKEN bit, 4-8 current loop receivers, 2-9 to 2-10 CLKOUTEN bit, 4-4 customer communication, xiii, G-1 CLKSELECT bit, 4-4 CV/ZERO* bit, 4-4 CNT<3..0> bit, 4-9 cold-junction reference (CJR) included on SCXI-1100, 1-1 Index-2 © National Instruments Corporation...
  • Page 119 A-2 INTR* signal FOUTEN* bit, 4-5 buffering of SLOT0SEL* line, 2-3 front connector description of, 3-5, C-3 AC-coupled connection, 2-15 equivalent to SLOTSEL* signal, 3-6 analog input channels, 2-13 to 2-16 © National Instruments Corporation Index-3 SCXI-1100 User Manual...
  • Page 120 SERDATOUT signal, 3-6 MOD<3..0> bit, 4-9 Module ID Register description of, 4-2 digital control circuitry, 3-8 to 3-9 reading from, 2-29 timing diagram, 2-29 MOSI signal description of, 3-6, C-4 equivalent to SERDATIN signal, 3-6 Index-4 © National Instruments Corporation...
  • Page 121 2-19 analog output signal connections, 2-24 description of, 2-13, D-2 applying external voltage OUTREF signal (warning), 2-24 analog output, 2-24 communication signals, 2-26 to 2-29 © National Instruments Corporation Index-5 SCXI-1100 User Manual...
  • Page 122 SCXI-1100. See also operation user-defined current receiver of SCXI-1100. resistors, 2-10 contents of kit, 1-1 RSVD bit, 4-5, 4-8 definition of, xi RSVD signal, 2-23, 3-5, B-2, C-3 optional equipment, 1-3 RTEMP bit, 4-5 optional software, 1-2 Index-6 © National Instruments Corporation...
  • Page 123 2-28 5-2 to 5-3 slot-select timing diagram, 2-27 SCXIbus equivalent, 3-6 timing requirements, 2-26 selecting slots, 2-26 to 2-29 SCXIbus connector signal descriptions, timing requirements, 2-28 3-5 to 3-6 © National Instruments Corporation Index-7 SCXI-1100 User Manual...
  • Page 124 DC, A-2 input protection, A-2 instrumentation amplifiers, A-1 noise, A-2 offset voltage, A-2 offset voltage drift, A-2 operating environment, A-3 physical, A-3 power dissipation, A-2 settling time, A-1 storage environment, A-3 SPICLK signal Index-8 © National Instruments Corporation...

  • Page 125: Glossary

    Celsius CAL/ENM* Calibration/Multiplexer Select bit CH#+ Positive Input Channel Number signal CH#- Negative Input Channel Number signal Chassis bit CGND Chassis Ground signal CHAN Channel Select bit CHSGND Chassis Ground signal © National Instruments Corporation Glossary-1 SCXI-1100 User Manual...
  • Page 126 Forced Output Enable bit Forced Retransmit bit Full Scale feet GAIN Gain Select bit GUARD Guard signal hexadecimal HSCR Hardscan Control Register HSRS* Hardscan Reset bit hertz input current leakage input current inches input-output SCXI-1100 User Manual Glossary-2 © National Instruments Corporation...
  • Page 127 MTEMP Multiplexed Temperature Sensor signal multiplexed temperature sensor NRSE nonreferenced single-ended (input) ONCE Once bit OUTPUT Output signal OUTREF Output Reference signal PGIA programmable gain instrumentation amplifier parts per million random-access memory © National Instruments Corporation Glossary-3 SCXI-1100 User Manual...
  • Page 128 TRIG0 Trigger 0 signal volts Positive Analog Supply signal Negative Anaolg Supply signal volts direct current virtual instrument volts in offset voltage volts out volts, root mean square watts SCXI-1100 User Manual Glossary-4 © National Instruments Corporation...

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