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National Instruments SCXI-1102 User Manual - Customer Communication

Other manuals for SCXI-1102: Application Note
Manual is about: 32-Channel Thermocouple Amplifier Modules

Summary of SCXI-1102

  • Page 1

    Scxi ™ -1102/b/c user manual 32-channel thermocouple amplifier modules scxi-1102/b/c user manual august 1997 edition part number 320975b-01 © copyright 1995, 1997 national instruments corporation. All rights reserved..

  • Page 2

    Support@natinst.Com e-mail: info@natinst.Com ftp site: ftp.Natinst.Com web address: http://www.Natinst.Com bbs united states: (512) 794-5422 bbs united kingdom: 01635 551422 bbs france: 01 48 65 15 59 (512) 418-1111 tel: (512) 795-8248 fax: (512) 794-5678 australia 03 9879 5166, austria 0662 45 79 9...

  • Page 3: Important Information

    Important information warranty the scxi-1102, scxi-1102b, and scxi-1102c modules are 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...

  • Page 4

    © national instruments corporation v scxi-1102/b/c user manual table of contents about this manual organization of this manual ...........................................................................................Ix conventions used in this manual...................................................

  • Page 5

    Table of contents scxi-1102/b/c user manual vi © national instruments corporation rear signal connector..................................................................................................... 3-7 rear signal connector descriptions ...........................................................

  • Page 6

    Table of contents © national instruments corporation vii scxi-1102/b/c user manual figures figure 1-1. The relationship between the programming environment, ni-daq, and your hardware .................................................................1-4 figure 2-1. Scxi-1102/b/c module parts locator d...

  • Page 7: Organization of This Manual

    © national instruments corporation ix scxi-1102/b/c user manual about this manual this manual describes the electrical and mechanical aspects of the scxi-1102 family of modules and contains information concerning their installation and operation. The scxi-1102 family consists of the following module...

  • Page 8

    About this manual scxi-1102/b/c user manual x © national instruments corporation includes specifications and connection instructions for the signals on the scxi-1102/b/c connectors. • chapter 4, theory of operation, contains a functional overview of the scxi-1102/b/c module and explains the operatio...

  • Page 9

    About this manual © national instruments corporation xi scxi-1102/b/c user manual mio board refers to the multichannel i/o daq boards that have mio in their names, such as the at-mio-16 and the nec-mio-16e-4. Monospace denotes text or characters that are to be literally input from the keyboard, sect...

  • Page 10: Customer Communication

    About this manual scxi-1102/b/c user manual xii © national instruments corporation • software documentation—examples of software documentation you may have are the labview and labwindows ® /cvi manual sets and the ni-daq documentation. After you set up your hardware system, use either the applicatio...

  • Page 11: Introduction

    © national instruments corporation 1-1 scxi-1102/b/c user manual chapter 1 introduction this chapter describes the scxi-1102/b/c modules; lists what you need to get started with your scxi-1102/b/c module, the optional software, optional equipment, and custom cables; and explains how to unpack the sc...

  • Page 12: What You Need to Get Started

    Chapter 1 introduction scxi-1102/b/c user manual 1-2 © national instruments corporation selectable gain of 1 or 100. You can multiplex the scxi-1102c inputs to a single output, which drives a single daq device channel. The scxi-1102/b/c modules operate with full functionality with the national instr...

  • Page 13

    Chapter 1 introduction © national instruments corporation 1-3 scxi-1102/b/c user manual software programming choices you have several options to choose from when programming your national instruments daq and scxi hardware. You can use national instruments application software, ni-daq, or register-le...

  • Page 14

    Chapter 1 introduction scxi-1102/b/c user manual 1-4 © national instruments corporation ni-daq driver software the ni-daq driver software is included at no charge with all national instruments daq hardware. Ni-daq has an extensive library of functions that you can call from your application programm...

  • Page 15: Optional Equipment

    Chapter 1 introduction © national instruments corporation 1-5 scxi-1102/b/c user manual register-level programming the final option for programming any national instruments daq hardware is to write register-level software. Writing register-level programming software can be very time-consuming and in...

  • Page 16: Custom Cables

    Chapter 1 introduction scxi-1102/b/c user manual 1-6 © national instruments corporation custom cables the following table summarizes the custom cable information. Unpacking your scxi-1102/b/c module is shipped in an antistatic package to prevent electrostatic damage to the module. Electrostatic disc...

  • Page 17: Configuration and

    © national instruments corporation 2-1 scxi-1102/b/c user manual chapter 2 configuration and installation this chapter describes how to configure your scxi-1102/b/c jumper, how to install current-loop receivers, and how to install your scxi-1102/b/c module into the scxi chassis. Module configuration...

  • Page 18

    Chapter 2 configuration and installation scxi-1102/b/c user manual 2-2 © national instruments corporation figure 2-1. Scxi-1102/b/c module parts locator diagram (1102 shown) 1 rcl24-rcl31 2 rcl14-rcl23 3 rcl8-rcl13 4 assembly number 5 rcl0-rcl7 6 serial number 7 w1 2 3 6 5 4 1 7.

  • Page 19

    Chapter 2 configuration and installation © national instruments corporation 2-3 scxi-1102/b/c user manual digital configuration if you have a one-chassis system, you do not have to read this section. You can skip to the next section, analog configuration. Note: if nothing is cabled to the scxi-1102/...

  • Page 20

    Chapter 2 configuration and installation scxi-1102/b/c user manual 2-4 © national instruments corporation if you want to change the w1 jumper setting, refer to figure 2-2 as you perform the following steps: 1. Ground yourself via a grounding strap or via a ground connected to your scxi chassis. Prop...

  • Page 21

    Chapter 2 configuration and installation © national instruments corporation 2-5 scxi-1102/b/c user manual the format: for input channel x, the resistor is rclx. For example, the resistor for channel 28 is rcl28. Caution: before installing the resistors in your module, make sure that there are no sig...

  • Page 22: Hardware Installation

    Chapter 2 configuration and installation scxi-1102/b/c user manual 2-6 © national instruments corporation hardware installation you can install the scxi-1102/b/c module in any available scxi chassis slot. After you have made any necessary changes and have verified and recorded the jumper setting on ...

  • Page 23: Signal Connections

    © national instruments corporation 3-1 scxi-1102/b/c user manual chapter 3 signal connections this chapter describes the input and output signal connections to the scxi-1102/b/c module via the module front connector and rear signal connector. This chapter also includes specifications and connection ...

  • Page 24

    Chapter 3 signal connections scxi-1102/b/c user manual 3-2 © national instruments corporation figure 3-1. Scxi-1102/b/c module front connector pin assignments +5 v cgnd cjsensor cjsensor cgnd nc nc nc nc nc nc nc nc nc nc cgnd nc nc nc nc nc nc nc cgnd nc nc nc nc nc nc nc cgnd 1 2 3 4 5 6 7 8 9 10 ...

  • Page 25

    Chapter 3 signal connections © national instruments corporation 3-3 scxi-1102/b/c user manual front connector signal descriptions analog input signal connections the signal terminals for the positive input channel are located in column b of the connector. The signal terminal for each corresponding n...

  • Page 26

    Chapter 3 signal connections scxi-1102/b/c user manual 3-4 © national instruments corporation input range for either positive or negative channel input is the maximum input voltage which will result in a valid measurement. Each channel includes input protection circuitry to withstand the accidental ...

  • Page 27

    Chapter 3 signal connections © national instruments corporation 3-5 scxi-1102/b/c user manual figure 3-2. Ground-referenced signal connection v s v + - - + front signal connector + - + - scxi - 1102/b/c cm ch0+ ch0- ch1+ ch1-.

  • Page 28

    Chapter 3 signal connections scxi-1102/b/c user manual 3-6 © national instruments corporation figure 3-3. Floating signal connection referenced to chassis ground cold-junction sensor connection pins a3 and a4 (cjsensor) connect the temperature sensor located on the scxi-1300 or scxi-1303 terminal bl...

  • Page 29: Rear Signal Connector

    Chapter 3 signal connections © national instruments corporation 3-7 scxi-1102/b/c user manual rear signal connector note: if you are using the scxi-1102/b/c module with a national instruments daq device and cable assembly, you do not need to read the remainder of this chapter. If you are using the s...

  • Page 30

    Chapter 3 signal connections scxi-1102/b/c user manual 3-8 © national instruments corporation rear signal connector descriptions the rear signal connector on the cabled module is the interface between the daq device and all modules in the scxi chassis. Pin signal name direction description 1, 2 aogn...

  • Page 31

    Chapter 3 signal connections © national instruments corporation 3-9 scxi-1102/b/c user manual the signals on the rear signal connector are analog output signals, digital i/o signals, or digital timing signals. The following section contains signal connection guidelines for each of these groups. Anal...

  • Page 32

    Chapter 3 signal connections scxi-1102/b/c user manual 3-10 © national instruments corporation the lab-lc boards, respectively. Table 3-1 lists the equivalencies. For more detailed information, consult your cable installation guide. Digital timing signal connection the scxi-1102/b/c module uses pin ...

  • Page 33: Theory of Operation

    © national instruments corporation 4-1 scxi-1102/b/c user manual chapter 4 theory of operation this chapter contains a functional overview of the scxi-1102/b/c module and explains the operation of each functional unit making up the scxi-1102/b/c module. Functional overview the block diagram in figur...

  • Page 34

    Chapter 4 theory of operation scxi-1102/b/c user manual 4-2 © national instruments corporation the major components of the scxi-1102/b/c modules are as follows: • rear signal connector • scxibus connector • scxibus interface • digital control circuitry • analog circuitry the scxi-1102/b/c modules co...

  • Page 35

    Chapter 4 theory of operation © national instruments corporation 4-3 scxi-1102/b/c user manual software programming choices in chapter 1, introduction, to learn about options for programming the control circuitry. Analog circuitry the analog circuitry per channel consists of a lowpass filter and an ...

  • Page 36

    Chapter 4 theory of operation scxi-1102/b/c user manual 4-4 © national instruments corporation analog bus switch the scxi-1102/b/c modules contain switches to place their analog output on the scxibus to pass the output to the scxi module cabled to the daq device. The scxi-1102/b/c modules also conta...

  • Page 37: Calibration

    © national instruments corporation 5-1 scxi-1102/b/c user manual chapter 5 calibration this chapter discusses the calibration procedures for the scxi-1102/b/c modules. Overview using the procedure described in this chapter, you will be able to calculate the gain error and voltage offset on a per cha...

  • Page 38

    Chapter 5 calibration scxi-1102/b/c user manual 5-2 © national instruments corporation to calibrate the scxi-1102/b/c module, you need a voltmeter with the following specifications: • accuracy ± 6 ppm standard reading ± 15 ppm sufficient reading • range –10 to +10 v • resolution 8.5 digits a multira...

  • Page 39

    Chapter 5 calibration © national instruments corporation 5-3 scxi-1102/b/c user manual note: if you are using a calibrator that supplies accurate voltages, you can simply use the known applied voltage for input1 instead of measuring. C. Measure the module output between mch0+ and mch0– with the dmm....

  • Page 40: Specifications

    © national instruments corporation a-1 scxi-1102/b/c user manual appendix a specifications this appendix lists the specifications for the scxi-1102/b/c modules. These specifications are typical at 25 ° cunless otherwise noted. Scxi-1102/b/c analog input input characteristics number of channels ........

  • Page 41

    Appendix a specifications scxi-1102/b/c user manual a-2 © national instruments corporation gain error (relative to calibration reference) gain = 1 after calibration.................... 0.015% of reading max before calibration ................. 0.04% of reading gain = 100 after calibration..............

  • Page 42

    Appendix a specifications © national instruments corporation a-3 scxi-1102/b/c user manual system noise (related to input) filters cutoff frequency (–3 db) ....................2 hz (1102) 200 hz (1102b) 10 khz (1102c) nmr (60 hz) ......................................40 db (1102) step response (eith...

  • Page 43

    Appendix a specifications scxi-1102/b/c user manual a-4 © national instruments corporation environment operating temperature ........................ 0 ° to 50 ° c storage temperature ........................... –55 ° to 150 ° c relative humidity ............................... 5% to 90% noncondensi...

  • Page 44: Calibration Sample Program

    © national instruments corporation b-1 scxi-1102/b/c user manual appendix b calibration sample program this appendix contains a sample program to help you calibrate your submodule. Sample program for calibration the following is a sample c program that implements the procedure discussed in the gain ...

  • Page 45

    Appendix b calibration sample program scxi-1102/b/c user manual b-2 © national instruments corporation dummydaqrange, /* these dummy variables would be used if the measurement actually came from a daq board and not an external dmm. */ ret; double scale, gain, vinput1, voutput1, vinput2, voutput2, bi...

  • Page 46

    Appendix b calibration sample program © national instruments corporation b-3 scxi-1102/b/c user manual scxi_reset(scxi_chassis_id, moduleslot); /* in reset state, the module will drive the mch0+ output */ scxi_single_chan_setup(scxi_chassis_id, moduleslot, 0, dummydaqboard); /* this is necessary onl...

  • Page 47

    Appendix b calibration sample program scxi-1102/b/c user manual b-4 © national instruments corporation scxi_cal_constants(scxi_chassis_id, moduleslot, modulechan, twopoint, nidaqmem, dummyrangecode, gain, dummydaqboard, dummydaqchan, dummydaqgain, 1, vinput1, bin_output1, vinput2, bin_output2, &bin_...

  • Page 48: Customer Communication

    © national instruments corporation c-1 scxi-1102/b/c user manual appendix c customer communication for your convenience, this appendix contains forms to help you gather the information necessary to help us solve your technical problems and a form you can use to comment on the product documentation. ...

  • Page 49

    Fax-on-demand is a 24-hour information retrieval system containing a library of documents on a wide range of technical information. You can access fax-on-demand from a touch-tone telephone at (512) 418-1111. You can submit technical support questions to the applications engineering team through e-ma...

  • Page 50: Technical Support Form

    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 ...

  • Page 51: Configuration Form

    Scxi-1102/b/c hardware and software configuration form record the settings and revisions of your hardware and software on the line to the right of each item. Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your curre...

  • Page 52: Documentation Comment Form

    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 ™ -1102/b/c user manual edition date: august 1997 part number: 320975b-01 please comment on th...

  • Page 53

    © national instruments corporation g-1 scxi-1102/b/c user manual glossary numbers/symbols +5 v +5 volt signal ° degrees Ω ohms % percent ± plus or minus a a amperes ac alternating current ach analog input channel signal prefix meanings value p- pico- 10 –12 n- nano- 10 –9 µ- micro- 10 –6 m- milli- 1...

  • Page 54

    Glossary scxi-1102/b/c user manual g-2 © national instruments corporation a/d analog-to-digital adc analog-to-digital converter–an electronic device, often an integrated circuit, that converts an analog voltage to a digital number aignd analog input ground signal aognd analog output ground signal aw...

  • Page 55

    Glossary © national instruments corporation g-3 scxi-1102/b/c user manual d d/a digital-to-analog daq data acquisition—(1) collecting and measuring electrical signals from sensors, transducers, and test probes or fixtures and inputting them to a computer for processing; (2) collecting and measuring ...

  • Page 56

    Glossary scxi-1102/b/c user manual g-4 © national instruments corporation dout digital output signal drivers/driver software software that controls a specific hardware device such as a daq device e eisa extended industry standard architecture esp engineering software package extconv external control...

  • Page 57

    Glossary © national instruments corporation g-5 scxi-1102/b/c user manual h hex hexadecimal hz hertz—the number of scans read or updates written per second i in. Inches indirect scanning the measurement that occurs when a signal passes on the scxibus from the scanned scxi module to the cabled scxi m...

  • Page 58

    Glossary scxi-1102/b/c user manual g-6 © national instruments corporation o out output signal outref output reference signal p pcmcia an expansion bus architecture that has found widespread acceptance as a de facto standard in notebook-size computers. It originated as a specification for add-on memo...

  • Page 59

    Glossary © national instruments corporation g-7 scxi-1102/b/c user manual serdatin serial data input signal serdatout serial data output signal signal conditioning the manipulation of signals to prepare them for digitizing slot0sel* slot 0 select signal t ttl transistor-transistor logic v v volts vc...

  • Page 60

    © national instruments corporation i-1 scxi-1102/b/c user manual index numbers +5 v signal (table), 3-3 a analog circuitry, 4-3 to 4-4 analog bus switch, 4-4 analog input channels, 4-3 analog configuration, 2-4 to 2-5 bent and trimmed resistor (figure), 2-5 current-loop receivers, 2-4 to 2-5 analog ...

  • Page 61

    Index scxi-1102/b/c user manual i-2 © national instruments corporation digital control circuitry, 4-2 to 4-3 digital i/o signal connections, 3-9 to 3-10 digital signal specifications, 3-10 digital timing signal connection, 3-10 documentation conventions used in manual, x to xi national instruments d...

  • Page 62

    Index © national instruments corporation i-3 scxi-1102/b/c user manual p parts locator diagram, 2-2 physical specifications, a-3 pin assignments front connector (figure), 3-2 rear connector (figure), 3-7 power requirements, a-4 r rear signal connector, 3-8 to 3-10 analog output signal connections, 3...

  • Page 63

    Index scxi-1102/b/c user manual i-4 © national instruments corporation national instruments application software, 1-3 ni-daq driver software, 1-4 register-level programming, 1-5 specifications, a-1 to a-4 amplifier characteristics, a-2 analog input, a-1 to a-3 digital signal specifications, 3-10 dyn...