National Instruments SC-2040 User Manual Download

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SC-2040

User Manual

Eight-Channel Simultaneous Sample-and-Hold Accessory

September 1994 Edition

Part Number 371191A-01

Summary of Contents for SC-2040

Page 1: ...Copyright 1994 National Instruments Corporation All Rights Reserved SC 2040 User Manual Eight Channel Simultaneous Sample and Hold Accessory September 1994 Edition Part Number 371191A 01...

Page 2: ...ices Australia 03 879 9422 Austria 0662 435986 Belgium 02 757 00 20 Canada Ontario 519 622 9310 Canada Qu bec 514 694 8521 Denmark 45 76 26 00 Finland 90 527 2321 France 1 48 14 24 24 Germany 089 741...

Page 3: ...HT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMA...

Page 4: ...or application designer 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 an...

Page 5: ...gister Level Programming 1 4 Optional Equipment 1 4 Unpacking 1 4 Chapter 2 Configuration and Installation 2 1 Board Configuration 2 1 Supplementary Configuration Information 2 6 Power Supply Selectio...

Page 6: ...rack and Hold T H Circuitry 4 3 Triggering from the DAQ Board 4 4 External Triggering 4 5 Output Connection 4 6 Power Supply 4 6 Chapter 5 Calibration Procedures 5 1 Software Calibration 5 1 Offset Ad...

Page 7: ...onnection 3 10 Figure 4 1 SC 2040 Block Diagram 4 2 Figure 4 2 T H Amplifier Hold Settling Time and Track Acquisition Time 4 4 Figure 4 3 MIO 16E Controlled Triggering 4 5 Figure 4 4 External Triggeri...

Page 8: ...llation of your SC 2040 The topics discussed are switch and jumper configuration connection of the SC 2040 to the MIO 16E and the power on sequence for your SC 2040 configuration Chapter 3 Signal Conn...

Page 9: ...ce of the documentation set for your system You could have any of several types of manuals depending on the hardware and software in your system Use the manuals you have as follows Your DAQ hardware u...

Page 10: ...ual 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 yo...

Page 11: ...g interchannel phase relationships The MIO 16E can trigger the track and hold amplifiers or you can supply an external trigger source Note When a board is referred to without an AT prefix that is MIO...

Page 12: ...with LabVIEW The LabVIEW Data Acquisition VI Libraries are functionally equivalent to the NI DAQ software except that the SCXI functions are not included in the LabVIEW software for Sun LabWindows has...

Page 13: ...vironment NI DAQ and Your Hardware The National Instruments PC AT MC EISA DAQCard and DAQPad Series DAQ hardware is packaged with NI DAQ software for PC compatibles NI DAQ software for PC compatibles...

Page 14: ...ight rack mount kit with metal wraparound cover Unpacking Your SC 2040 board is shipped in an antistatic package to prevent electrostatic damage to the board Electrostatic discharge can damage several...

Page 15: ...ation of your SC 2040 The topics discussed are switch and jumper configuration connection of the SC 2040 to the MIO 16E and the power on sequence for your SC 2040 configuration Board Configuration The...

Page 16: ...Configuration and Installation Chapter 2 SC 2040 User Manual 2 2 National Instruments Corporation Figure 2 1 SC 2040 Parts Locator Diagram...

Page 17: ...nded Additionally there are eight sets of switches and jumpers that configure the gain settings and input modes of the eight SC 2040 channels Table 2 1 Power Supply Selection Switch Description Config...

Page 18: ...his position to connect the SC 2040 analog ground to the metal standoffs or to a rack mount kit which may provide shielding for the SC 2040 W1 SHLD OFF SHLD ON Table 2 3 DAQ Board Ground Isolation Sel...

Page 19: ...umber side up A B C D Other gains Refer to Supplementary Configuration Information later in the chapter and the gain table on the board itself Table 2 5 Channel Input Mode Switch Description Configura...

Page 20: ...fuse limited to 1 A at 5 V Shield Selection If you are using a rack mount kit shield the SC 2040 from unwanted noise by connecting the analog ground on the board to the metal chassis of the rack usin...

Page 21: ...200 B 300 B and C 500 A 600 A and C 700 A and B 800 A B and C Input Mode Selection Jumpers W2 through W9 select the input mode for each channel on the SC 2040 Position A B leaves the negative input o...

Page 22: ...Find the installation and system configuration section for your operating system and follow the instructions given there If you are using LabVIEW the software installation instructions are in your La...

Page 23: ...mputer This includes connecting any power signals to ground and vice versa National Instruments is not liable for any damages resulting from any such signal connections Corresponding signals on connec...

Page 24: ...Connector J11 B I O Connector J12 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 6 7 5 4 3 2 1 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58...

Page 25: ...16 AIGND ACH14 58 17 ACH7 ACH7 57 18 AIGND ACH15 23 19 NC AISENSE 62 20 NC DAC0OUT 22 21 NC DAC1OUT 21 22 NC EXTREF 20 23 NC AOGND 54 55 24 33 DGND DGND 4 7 9 12 13 15 18 35 36 39 44 50 53 25 NC DIO0...

Page 26: ...t to 1 A of the 5 V supply Table 3 3 Output Connectors J11 and J12 Signal Summary J11 Pin 50 pin J12 Pin 68 pin Signal Name Description 1 2 4 6 8 10 12 14 16 18 23 24 26 27 29 31 32 34 56 58 59 61 63...

Page 27: ...ns the SC 2040 into track mode With an MIO 16E attached pin 46 on J11 should be used for monitoring purposes only others others compatibility The remaining pins provide 50 pin compatibility with the 6...

Page 28: ...oration SC 2040 Input Signals AIGND CH0 CH0 CH1 CH1 CH7 CH7 TRIG DGND SC 2040 Screw Terminals Signals Sent to MIO 16 AIGND AISENSE ACH1 ACH7 PFI2 STARTSCAN PFI7 DGND J11 and J12 Connectors on SC 2040...

Page 29: ...tial inputs so the signals you are measuring should be ground referenced If they are not set jumpers W2 through W9 of the nonreferenced channels to position B C to create a DC path for the input bias...

Page 30: ...or from the positive input channel connected to its negative ground Doing this creates the DC path for the positive input bias current Typical resistor values range from 100 k to 10 M This solution al...

Page 31: ...Manual Figures 3 5 through 3 7 illustrate how to connect AC coupled signals IN IN SC 2040 Vin CH CH A 100 k A B C Figure 3 5 Ground Referenced AC Coupled Signal Connection IN IN SC 2040 GND Analog Vi...

Page 32: ...hould be careful to minimize noise pickup The common mode rejection of the instrumentation amplifiers decreases significantly at high frequencies The amplifiers do not reject normal mode noise The com...

Page 33: ...ly at its transitions This noise can cause the SC 2040 to enter hold mode on the wrong edge Two possible sources of noise are interference and reflection The best way to reduce noise corruption is to...

Page 34: ...ght channels each one comprising an instrumentation amplifier with DIP switch programmable gains of 1 10 100 200 300 500 600 700 or 800 and a track and hold amplifier The analog inputs are overvoltage...

Page 35: ...t Protection Input Protection Inst Amp Inst Amp Gains Gains A A 68 Pin I O Connector 50 Pin Breakout Connector ACH0 ACH7 PFI7 PFI2 Track Hold Signal 5 V 15 V 15 V Power On LED External 5 V Power Conve...

Page 36: ...resulting in an increase in measurement resolution and accuracy Furthermore the amplifiers exhibit low bias currents and good bandwidth even at high gains You can select gains for each channel indepen...

Page 37: ...T H Amplifier Hold Settling Time and Track Acquisition Time Triggering from the DAQ Board This section applies to you only if you are triggering the SC 2040 from the MIO 16E board Note No signal shou...

Page 38: ...track mode The external trigger signal is a digital input and must conform to digital logic levels Because the SC 2040 track and hold circuitry must re acquire the input signals at the conclusion of e...

Page 39: ...ignals to and from the DAQ board and also provides 5 V power if selected by the power switch The corresponding pins of the 50 pin connector are tied to those of the 68 pin connector so that you can mo...

Page 40: ...th the SC 2040 the use of software rather than hardware calibration does not significantly reduce dynamic range The main drawback of software calibration is reduced throughput due to the increased pro...

Page 41: ...olynomial fit of the calibration points Alternatively and preferably for DAQ boards with no more than 12 bits of resolution you can determine the nonlinearity of the system on a code by code basis and...

Page 42: ...fference is because of a phenomenon known as hold step in which a small amount of charge is transferred to the track and hold amplifier hold capacitor during the transition from track mode to hold mod...

Page 43: ...ero At this gain most of the board offset is due to output offset The input offset adjustment has minimal effect Set the DAQ board to read the channel Acquire the data averaging as in step 4 Adjust th...

Page 44: ...700 14 29 mV 800 12 5 mV Input coupling DC Max working voltage signal common mode Average of 2 inputs should remain within 7 V of ground Overvoltage protection 30 V powered on 15 V powered off Inputs...

Page 45: ...dB min 90 dB typ Gain 10 87 dB min 104 dB typ Gain 100 100 dB min 110 dB typ Output range 10 V Dynamic Characteristics Bandwidth Gain 3 dB Bandwidth 1 2 MHz 10 800 kHz 100 500 kHz 200 300 kHz 300 180...

Page 46: ...nt 10 150 gain V C Gain temperature coefficient Gain DIP switch selectable Max Gain Tempco 1 25 ppm C 10 25 ppm C 100 45 ppm C 200 60 ppm C 300 80 ppm C 500 100 ppm C 600 120 ppm C 700 150 ppm C 800 2...

Page 47: ...e Monday through Friday from 8 00 a m to 6 00 p m central time In other countries contact the nearest branch office You may fax questions to us at any time Corporate Headquarters 512 795 8248 Technica...

Page 48: ...any National Instruments hardware or software products related to this problem include the configuration forms from their user manuals Include additional pages if necessary Name Company Address Fax Ph...

Page 49: ..._________________________________________ Other Products Computer Make and Model __________________________________________________ Microprocessor __________________________________________________ Cl...

Page 50: ...Part Number 371191A 01 Please comment on the completeness clarity and organization of the manual If you find errors in the manual please record the page numbers and describe the errors Thank you for y...

Page 51: ...Gauge C Celsius CH module positive input channel number CH module negative input channel number CMOS complementary metallic oxide semiconductor cps counts per second D A digital to analog DAQ data ac...

Page 52: ...I serial peripheral interface tempco temperature coefficient T H track and hold UL Underwriters Laboratory V volts VI virtual instrument VIH volts input high VIL volts input low Vin volts in VOH volts...

Page 53: ...plifier characteristics A 2 dynamic characteristics A 2 input characteristics A 1 S H characteristics A 3 stability A 3 transfer characteristics A 1 analog signal inputs 3 7 to 3 11 AC coupled inputs...

Page 54: ...2 4 DC coupled inputs 3 7 to 3 8 floating signal connection illustration 3 8 ground referenced signal connection illustration 3 7 leaving connector J5 disconnected note 3 7 DGND signal input connector...

Page 55: ...I O connectors J11 and J12 illustration 3 2 optional equipment 1 4 required components 1 1 software programming choices LabVIEW and LabWindows application software 1 2 NI DAQ driver software 1 2 to 1...

Page 56: ...ion analog circuitry 4 2 to 4 6 amplification 4 3 external triggering 4 5 to 4 6 input protection 4 3 output connection 4 6 power supply 4 6 track and hold T H circuitry 4 3 to 4 4 triggering from DAQ...

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