User`s Manual
Contents
1. Caution Shaded caution statements present information to help you avoid injuring yourself and others damaging your hardware or losing your data dit Angle brackets that enclose numbers separated by a colon signify a range of numbers such as those assigned to registers bit settings etc bold text Bold text is used for the names of objects on the screen such as buttons text boxes and check boxes For example 1 Insert the disk or CD and click the OK button italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase For example The nstaCal amp installation procedure is explained in the Quick Start Guide Never touch the exposed pins or circuit connections on the board Where to find more information The following electronic documents provide helpful information relevant to the operation of the USB 1608FS a MCC s Specifications USB 1608FS the PDF version of the Electrical Specification Chapter in this guide is available on our web site at www mccdaq com pdfs USB 1608FS pdf MCC s Quick Start Guide is available on our web site at www mccdaq com PDFmanuals DAQ Software Quick Start pdf MCC s Guide to Signal Connections is available on our web site at www mcecdag com signals signals pdf MCC s Universal Library User s Guide is available on our web site at www mccdaq com PDFmanuals sm ul user guide pdf MCC s Universal Library Function Reference is ava2. for the slave USB 1608FS to 6 Set the Universal Library 1 enable pacer output An example of a master slave configuration is shown below Set the Universal Library EXTCLOCKoption with USB 1608FS i USB 1608FS cbAInScan AInScan for the slave USB 1608FS Master Configure the Configure the SYNC pin SYNC pin for output for input Figure 3 11 Configuring for synchronous data acquisition When you are operating one USB 1608FS do not set the EXTCLOCK option unless you are using an external clock for A D pacing Chapter 4 Specifications Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input section Table 1 Analog input specifications Parameter Conditions Specification A D converter type 16 bit successive Approximation type Number of channels 8 single ended Input configuration Individual A D per channel Sampling method Simultaneous Absolute maximum input voltage CHx IN to GND 15 V max Input impedance 100 MOhm min Input ranges Software selectable 10 V 45 V 2 V 41 V Sampling rate Scan to PC memory 0 6 S s to 50 kS s software programmable Burst scan to 32 k sample FIFO 20 S s to 50 kS s software programmable Throughput Software paced 500 S s all channels Scan to PC memory Note 1 100 kS s o
3. The accuracy plots in Figure 3 10 are drawn for clarity and are not drawn to scale Input Voltage deal 1 66mV 4mV deal Ideal 1 66mV 4mV Output Code Ideal 1 66mV 4mV gt Ideal 10V Ideal 1 66mV 4mV Figure 3 10 Error band plot 3 9 USB 1608FS User s Guide Functional Details Gain queue The USB 1608FS gain queue allows you to set up a different gain setting for each channel The gain queue removes the restriction of having a single gain for all channels This feature creates a gain list which is written to local memory on the USB 1608FS The gain list is made up of a channel number and range setting An example of an eight element list is shown in Table 3 2 Table 3 2 Sample channel gain queue list Element Channel Range 0 CHO BIP10V 1 CHI BIP5V 2 CH2 BIP10V 3 CH3 BIPIV 4 CH4 BIP2V 5 CH5 BIP10V 6 CH6 BIPIV 7 CH7 BIP5V Note that the gain queue must contain eight elements that include all eight channels You must carefully match the gain to the expected voltage range on the associated channel otherwise an over range condition can occur Although this condition does not damage the USB 1608FS it does produce a useless full scale reading It can also introduce a long recovery time due to saturation of the input channel Synchronizing multiple units You can connect the SYNC pin of two USB 1608FS units together in a master s
4. when using Windows XP make sure you have XP Hotfix KB822603 installed This update is intended to address a serious error in Usbport sys when you operate a USB device You can run Windows Update or download the update from www microsoft com downloads details aspx familyid 733dd867 56a0 4956 b7fe e85b688b7f86 amp displaylang en For more information refer to the Microsoft Knowledge Base article Availability of the Windows XP SP1 USB 1 1 and 2 0 update This article is available at support microsoft com kbid 822603 To connect the USB 1608FS to your system turn your computer on and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer The USB cable provides power and communication to the USB 1608FS The USB 1608FS installs as a composite device with separate devices attached When you connect the USB 1608FS for the first time Found New Hardware popup balloons Windows XP or dialogs other Windows version open as each USB 1608FS interface is detected 3 Sa USB 1608FS USB Human Interface Device E i Found New Hardware Windows has found new hardware and is locating the software for it It is normal for multiple dialogs to open when you connect the USB 1608FS for the first time For additional information refer to the Notes on installing and using the USB 1608FS that was shipped with the USB 1608FS When the last balloon or dialog closes the in
5. 3 5 USB 1608FS User s Guide Functional Details ET GND 5V Figure 3 6 Schematic showing switch detection by digital channel DIOO For more information on digital signal connections For general information regarding digital signal connections and digital I O techniques refer to the Guide to Signal Connections available on our web site at www mccdag com signals signals pdf Power terminals The PC 5 V connection pin 39 is on the bottom screw terminal of the USB 1608FS Refer to the pinout diagram on page 3 3 for the location of this pin This terminal draws power from the USB connector The 5 V screw terminal is a 5 volt output that is supplied by the computer Caution The 5 V terminal is an output Do not connect to an external power supply or you may damage the USB 1608FS and possibly the computer The maximum total output current that can be drawn from all USB 1608FS connections power analog and digital outputs is 500 mA This maximum applies to most personal computers and self powered USB hubs Bus powered hubs and notebook computers may limit the maximum available output current to 100 mA The USB 1608FS alone draws 150 mA of current from the USB 5 V supply Once you start running applications with the USB 1608FS each DIO bit can draw up to 2 5 mA The maximum amount of 5 V current available for experimental use over and above that required by the USB 1608FS is the difference between the total curr
6. absolute measurement Accuracy specifications describe the actual measurement that can be relied upon with a USB 1608FS There are three types of errors which affect the accuracy of a measurement system offset gain nonlinearity The primary error sources in the USB 1608FS are offset and gain Nonlinearity is small in the USB 1608FS and is not significant as an error source with respect to offset and gain Figure 3 7 shows an ideal error free USB 1608FS transfer function The typical calibrated accuracy of the USB 1608FS is range dependent as explained in the Specifications chapter of this document We use a 10 V range as an example of what you can expect when performing a measurement in this range 3 7 USB 1608FS User s Guide Functional Details Input Voltage Output Code E 32768 65535 10V Figure 3 7 Ideal ADC transfer function The USB 1608FS offset error is measured at mid scale Ideally a zero volt input should produce an output code of 32768 Any deviation from this is an offset error Figure 3 8 shows the USB 1608FS transfer function with an offset error The typical offset error specification for the USB 1608FS on the 10 V range is 1 66 mV Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis The accuracy plots in Figure 3 8 are drawn for clarity and are not drawn to scale Input Voltage Output Code 7
7. 00 SS ERE ER a a ta aa a 1 2 55 38 2 55 41 2 55 43 2 55 45 2 55 47 2 55 49 Tim E channeio Acquisition Rate secs sample f 0 Set Rate Number of points displayed 10 10 seconds Using a rate faster than 1 sec sample may lead to timing inaccuracies EFEEEEEEI Zoom Off Figure 3 4 TracerDAQ showing single ended measurement data For more information on analog signal connections For more information on single ended inputs refer to the Guide to Signal Connections this document is available on our web site at www mccdaq com signals signals pdf Digital I O terminals DIOO to DIO7 You can connect up to eight digital I O lines to the screw terminal containing pins 21 to 40 DIOO to DIO7 Refer to the pinout diagram on page 3 3 for the location of these pins You can configure each digital bit for either input or output All digital I O lines are pulled up to USB 5 V with a 47 K resistor default You can request the factory to configure the resistor for pull down to ground if desired When you configure the digital bits for input you can use the USB 1608FS digital I O terminals to detect the state of any TTL level input Refer to the switch circuit shown in Figure 3 5 and the schematic shown in Figure 3 6 If you set the switch to the 5 V input DIOO reads TRUE 1 If you move the switch to GND DIOO reads FALSE 0 Figure 3 5 Digital connection DIOO detecting the state of a switch
8. aaa atana 2 1 What comes with your USB 1608FS shipment sss 2 1 SE CP E C 2 1 Additional documentatiOD need ad ere ER GERI PURI EFE REM UR A E T ag AEA A E casa don LEN EAAS 2 1 Unpacking the USB 1608ES 4 eene eee ette ec ee eI HP ede dede Tee e eed 2 1 Installing the SOftwareu a sott e tegit opi e uie e e nie Eten 2 2 Installing the hardware E Ee e E 2 2 Chapter 3 Functional Detalls i Loses tee eee ieeeteo Deut duret a anaa ara aaia eere dere 3 1 Theory of operation analog input acquisition modes ssssssseseseeeeeeeeneen eene 3 1 Software paced ModE moros saen He PERTH I GEHE EA TS ER e OR Re ea aad ETHER Continuous scan mode B rst scan mode ie tec etd ence itii ee E cele sa eene heec etate coved eod nep e Nonne d i be ede AER Bb se rot se E External components eh ente ava it eese as ia ate s USB Contectorx oce d bp etie he rp ba hadi ee ad pepe eism ease e Re E eise PED cit aee cnst Screw terminal wiring Mati connector anid pin Outre sects eos ER GERIT TA TM BER THERE TERR TM NER ERE T e eR en 3 3 Analog input terminals CHO IN CH7 IN nee enne nennen enne nnen tren enne teen trennen nete reinen serene 3 4 Digital I O terminals DIOO to DIO7 Power terminals enrenar iiien esoe ioo AEn seik Ground terminals Calibration terminal Counter terminal SYNC terminal Trigger t
9. absolute max Input low voltage 1 0 V max 0 5 V absolute min Note 5 CTR isa Schmitt trigger input protected with a 1 5K Ohm series resistor Memory Table 9 Memory specifications Data FIFO 32 768 samples 65 536 bytes EEPROM 1 024 bytes EEPROM configuration Address range Access Description 0x000 0x07F Reserved 128 bytes system data 0x080 0x1FF Read write 384 bytes cal data 0x200 0x3FF Read write 512 bytes user area 4 3 USB 1608FS User s Guide Specifications Microcontroller Table 10 Microcontroller specifications Type High performance 8 bit RISC microcontroller Program memory 16 364 words Data memory 2 048 bytes Power Parameter Conditions Specification Supply current USB enumeration lt 100 mA Supply current Note 6 Continuous mode 150 mA 5 V USB power available Connected to self powered hub 4 5 V min 5 25 V max Note 7 Connected to externally powered root port hub Output current Note 8 350 mA max Note 6 This is the total current requirement for the USB 1608FS which includes up to 10 mA for the status LED Note 7 Self powered hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB device to draw up to 500 mA Root port hubs reside in the PC s USB host Controller The USB port s on your PC are root port hubs All externally powered ro
10. or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems which a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people iii Table of Contents Preface About this User s Guide 2 nene eee dereud dee setae cee recu innen renun vi What you will learn from this user s guide ssssssesseseeeeneeeeneenn nennen enne nennen nnne vi Conventions in this user s guide sssssssssessesseseereer enne ener nnne trennen nennen rr en rennen innen nennen vi Where to find more information essere enne enne nnne nnne n trennen en rennen nnne nns vi Chapter 1 Introducing the USB 1608FS ccecccesseeeseseeeeeeeseeseeeeeeeesneeseeesesesneeseseseeeseseenaesesesneeseseseneesnseneeees 1 1 USB 1608FS block diagram sess eene nennen trennen rr en rennen enn nnns 1 2 Software features s end eot dtu od ae ll Ces we ee a 1 2 Connecting a USB 1608FS to your computer is easy eene nennen enne enne 1 3 Chapter 2 Installing the USB 1608F8S eere ode tte eerie ute aae taie
11. to work with USB ports We use the Microsoft HID because it is a standard and its performance delivers full control and maximizes data transfer rates for your USB 1608FS No third party device driver 1s required The USB 1608FS is plug and play There are no jumpers to position DIP switches to set or interrupts to configure You can connect the USB 1608FS before or after you install the software and without powering down your computer first When you connect an HID to your system your computer automatically detects it and configures the necessary software You can connect and power multiple HID peripherals to your system using a USB hub You can connect your system to various devices using a standard four wire cable The USB connector replaces the serial and parallel port connectors with one standardized plug and port combination You do not need a separate power supply module The USB automatically delivers the electrical power required by each peripheral connected to your system Data can flow two ways between a computer and peripheral over USB connections Chapter 2 Installing the USB 1608FS What comes with your USB 1608FS shipment The following items are shipped with the USB 1608FS Hardware USB 1608FS USB cable 2 meter length Additional documentation In addition to this hardware user s guide you should also receive the Quick Start Guide available in PDF at www mccdaq com PDFmanuals DA Q Software Quick S
12. 32768 l 66mV 0 A Actual 65535 10V Figure 3 8 ADC transfer function with offset error Gain error is a change in the slope of the transfer function from the ideal and is typically expressed as a percentage of full scale Figure 3 9 shows the USB 1608FS transfer function with gain error Gain error is easily converted to voltage by multiplying the full scale input 10 V by the error 3 8 USB 1608FS User s Guide Functional Details The accuracy plots in Figure 3 9 are drawn for clarity and are not drawn to scale Input Voltage A Gain error 0 04 or AmV Ideal FAUN Gain error 0 04 or AmV Actual Output Code 65535 10V Figure 3 9 ADC Transfer function with gain error For example the USB 1608FS exhibits a typical calibrated gain error of 0 04 on all ranges For the 10 V range this would yield 10 V x 0 0002 4 mV This means that at full scale neglecting the effect of offset for the moment the measurement would be within 4 mV of the actual value Note that gain error is expressed as a ratio Values near FS 10 V are more affected from an absolute voltage standpoint than are values near mid scale which see little or no voltage error Combining these two error sources in Figure 3 10 we have a plot of the error band of the USB 1608FS at full scale 10 V This plot is a graphical version of the typical accuracy specification of the product
13. 38 CTR 19 AGND 39 PC 5V 20 AGND 40 GND 4 5 C Declaration of Conformity Manufacturer Measurement Computing Corporation Address 10 Commerce Way Suite 1008 Norton MA 02766 USA Category Electrical equipment for measurement control and laboratory use Measurement Computing Corporation declares under sole responsibility that the product USB 1608FS to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EU EMC Directive 89 336 EEC Electromagnetic Compatibility EN 61326 1997 Amendment 1 1998 Emissions Group 1 Class A EN 55011 1990 CISPR 11 Radiated and Conducted emissions Immunity EN61326 Annex A EC 1000 4 2 1995 Electrostatic Discharge immunity Criteria A EC 1000 4 3 1995 Radiated Electromagnetic Field immunity Criteria A EC 1000 4 8 1994 Power Frequency Magnetic Field immunity Criteria A Declaration of Conformity based on tests conducted by Chomerics Test Services Woburn MA 01801 USA in May 2004 Test records are outlined in Chomerics Test Report EMI3876 04 We hereby declare that the equipment specified conforms to the above Directives and Standards pe hora Carl Haapaoja Director of Quality Assurance Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdag com www mccdag com
14. 8 Table 4 summarizes the noise performance for the USB 1608FS Noise distribution is determined by gathering 50 K samples with inputs tied to ground at the user connector Samples are gathered at the maximum specified sampling rate of 50 kS s Table 4 Noise performance Range Typical counts LSBrms 10 V 10 1 52 5 V 10 1 52 2 V 11 1 67 1V 14 2 12 Digital input output Table 5 Digital I O specifications Digital type CMOS Number of I O 8 DIOO through DIO7 Configuration Independently configured for input or output Pull up pull down configuration All pins pulled up to Vs via 47 K resistors default Positions available for pull down to ground Hardware selectable via zero ohm resistors as a factory option Input high voltage 2 0 V min 5 5 V absolute max Input low voltage 0 8 V max 0 5 V absolute min Output high voltage IOH 2 5 mA 3 8 V min Output low voltage IOL 2 5 mA 0 7 V max Power on and reset state Input External trigger Table 6 External trigger specifications Parameter Conditions Specification Trigger source Note 3 External digital TRIG IN Trigger mode Software selectable Edge sensitive user configurable for CMOS compatible rising or falling edge Trigger latency 10 us max Trigger pulse width lus min Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0
15. C O O0 r XO LO xr CO CN QO O OO l CO LO sr CO CN NF CO 00 00 CO C0 CO CO CO CO CO CN CN ONE OX CN ONE CN ONE OVI 2 m atyOztaea9oasxoao6aoacdao ae9 Sok REOSOSOSOSOSOSOSO OLOFHOADOAGOOOOAOOO00000 Analog input terminals CHO IN CH7 IN You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 CHO IN through CH7 IN Refer to the pinout diagram on page 3 3 for the location of these pins We recommend that you connect unused analog input terminals to ground terminals during operation For example if you are not using terminal 15 CH7 IN connect this terminal to terminal 16 AGND Input configuration All of the analog input channels are configured for single ended input mode Each analog signal is referenced to signal ground AGND and requires two wires The wire carrying the signal to be measured connects to CH IN The second wire connects to AGND The input voltage ranges are 10 V 5 V 22 0 V 1 0 V The following image illustrates a typical single ended measurement connection Figure 3 3 Single Ended measurement connection 3 4 USB 1608FS User s Guide Functional Details The following image shows the single ended measurement data acquired by TracerDAQ S Data Acquisition TracerDAQ TracerDAQ inix Bx aQ File Edit Run Help Ex weed X 10 0 80 M amp 0 gE tf 5 40 E IUS
16. USB 1608FS USB based Analog and Digital I O Module User s Guide MEASUREMENT COMPUTING USB 1608FS USB based Analog and Digital I O Module User s Guide A A MEASUREMENT COMPUTING Document Revision 2 May 2006 Copyright 2006 Measurement Computing Corporation Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Refer to www mccdaq com execteam html for the names titles and contact information of each key executive at Measurement Computing Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our two missions To offer the highest quality computer based data acquisition control and GPIB hardware and software available at the best possible price To offer our customers superior post sale support FREE Whether providing unrivaled telephone technical and sales support on our latest product offerings or continuing that same first rate support on older products and operating systems we re committed to you Lifetime warranty Every hardware product manufactured by Measurement Computing Corporation is warranted against defects in materials or workmanship for the life of the product Products found defective are repaired or replaced promptly Lifetime Harsh Envir
17. V max 0 5 V absolute min Input leakage current E 0uA Note3 TRIG IN is a Schmitt trigger input protected with a 1 5K Ohm series resistor 4 2 USB 1608FS User s Guide Specifications External clock input output Table 7 External clock I O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Software selectable direction Output Outputs internal A D pacer clock Input Receives A D pacer clock from external Source Input clock rate 50 kHz maximum Clock pulse width Input lus min Output Sus min Input leakage current 1 0uA Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Output high voltage Note 4 IOH 2 5 mA 3 3 V min No load 3 8 V min Output low voltage Note 4 IOL 2 5 mA 1 1 V max No Load 0 6 V max Note 4 Counter section SYNC is a Schmitt trigger input and is over current protected with a 200 Ohm series resistor Table 8 Counter specifications Pin name Note 5 CTR Counter type Event counter Number of channels 1 Input type TTL rising edge triggered Input source CTR screw terminal Resolution 32 bits Schmidt trigger hysteresis 20 mV to 100 mV Input leakage current tluA Maximum input frequency 1 MHz High pulse width 500 ns min Low pulse width 500 ns min Input high voltage 4 0 V min 5 5 V
18. an output you should use only to calibrate the USB 1608FS Refer to the pinout diagram on page 3 3 for the location of this pin Calibration of the USB 1608FS is software controlled by InstaCal Counter terminal The CTR connection pin 38 is a TTL level input to a 32 bit event counter Refer to the pinout diagram on page 3 3 for the location of this pin The internal counter increments when the TTL level transitions from low to high The counter can count frequencies of up to 1 MHz SYNC terminal The SYNC connection pin 36 is a bidirectional I O signal You can use it for two purposes Configure as an external clock input to externally source the A D conversions The SYNC terminal supports TTL level input signals of up to 50 kHz Configure as an output to synchronize with a second USB 1608FS and acquire data from 16 channels Refer to the pinout diagram on page 3 3 for the location of this pin For more information refer to page 3 10 Trigger terminal The TRIG_IN connection pin 37 is an external digital trigger input You can configure this terminal with software for either rising or falling edge Accuracy The overall accuracy of any instrument is limited by the error components within the system Quite often resolution is incorrectly used to quantify the performance of a measurement product While 16 bits or 1 part in 65536 does indicate what can be resolved it provides little insight into the quality or accuracy of an
19. d written to an on board FIFO buffer on the USB 1608FS until you stop the scan The FIFO buffer is serviced in blocks as the data is transferred from the USB 1608FS FIFO buffer to the memory buffer on your computer The maximum sampling rate is an aggregate rate where the total sample rate for all channels is 100 kS s divided by the number of channels with a maximum rate of 50 kS s for any channel Using this equation you can acquire data with the USB 1608FS from one channel at 50 kS s two channels at 50 kS s each four channels at 25 kS s each and so on up to eight channels at 12 5 kS s each You can start a continuous scan with either a software command or with an external hardware trigger event Burst scan mode In burst scan mode you can acquire data with the USB 1608FS using the full capacity of its 32 K sample FIFO The acquired data 1s then read from the FIFO and transferred to a user buffer in your computer You can initiate a single acquisition sequence of one two four or eight channels by either a software command or an external hardware trigger Burst scans are limited to the depth of the on board memory as the data 1s acquired at a rate faster than it can be transferred to the computer The maximum sampling rate is an aggregate rate where the total acquisition rate for all channels is 200 kS s divided by the number of channels with a maximum rate of 50 kS s for any channel The maximum rate that you can acquire data using burst
20. ed in advance of the possibility of such damages HM USB 1608FS doc ii Trademark and Copyright Information TracerDAQ Universal Library nstaCal Harsh Environment Warranty Measurement Computing Corporation and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Windows Microsoft and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation LabVIEW is a trademark of National Instruments CompactFlash is a registered trademark of SanDisk Corporation All other trademarks are the property of their respective owners Information furnished by Measurement Computing Corporation is believed to be accurate and reliable However no responsibility is assumed by Measurement Computing Corporation neither for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and
21. ent requirement of the USB 1608FS based on the application and the allowed current draw of the computer platform 500 mA for desktop computers and self powered hubs With all outputs at their maximum output current you can calculate the total current requirement of the USB 1608FS USB 5 V as follows USB 1608FS 150 mA 8 DIO 2 5 mA ea 170 mA For an application running on a computer or powered hub the maximum available excess current is 500 mA 170 mA 330 mA This number is the total maximum available current at the PC 5 V screw terminals Measurement Computing highly recommends that you figure in a safety factor of 20 below this maximum current loading for your applications A conservative safe user maximum in this case would be in the 250 300 mA range Since some laptop computers running on battery power only allow up to 100 mA the USB 1608FS may be above that allowed by the computer In this case you must either purchase a self powered hub or operate the laptop computer from an external power adapter Ground terminals The 11 analog ground connections provide a common ground for all USB 1608FS input channels Eight ground connections provide a common ground for the DIO TRIG IN CTR SYNC and PC 5 V connections Refer to the pinout diagram on page 3 3 for the location of the AGND and GND terminal pins 3 6 USB 1608FS User s Guide Functional Details Calibration terminal The CAL connection pin 17 is
22. erminali eene etie Crean depo etl d reb EP Labbe ACCURACY S 5 nasci ee cose tiet ede e E EE ee Ee ec de ede Ue be CORR PER ER Eee ede itr de cee re Fe de DEGERE eed T ERE RR PURUS GENDER Synchronizing multiple units nessie ninii ieee anrea ener enne nnne nennen eian nnne nnne Chapter 4 Specifi CAtlONS em a ead sss ed Saeed sade cee aa AE E EE a E seeds ewesucowawes dues sueutewieeesteys 4 1 Analog input section i s oet ebd eee tede Seas ated ente ute Silda eR Nien hae 4 1 Digital anput Outputs sr oec e ERREUR OP M ae epi 4 2 External tt1996T 35r tetien t eer EIE M PP ete t T i emt 4 2 External clock input output a rete e cete ee e E D UR EI e eei de Re 4 3 Counter SeCtionds ic et ime Re ert eer te RE ur t tte ve tret Se i eter ert ane d tv eere dee 4 3 Avsunvw ML REE 4 3 Microcontroller te Ue Tace tees vie RU 4 4 USB 1608FS User s Guide Environmental Mechanical Preface About this User s Guide What you will learn from this user s guide This user s guide explains how to install configure and use the USB 1608FS so that you get the most out of its USB data acquisition features This user s guide also refers you to related documents available on our web site and to technical support resources Conventions in this user s guide For more information on Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading
23. f channels max of 50 kS s for any channel Burst scan to 32 k 200 kS s of channels max of sample FIFO 50 kS s for any channel Gain queue Software configurable Eight elements one gain element per channel Resolution 16 bits No missing codes 15 bits Crosstalk Signal DC 25 KHz 80 dB CAL output User calibration source 0 625 V 1 25 V 2 5 V 5 0 V software selectable CAL output accuracy Note 2 0 5 typ 1 0 max CAL current 5 mA max Trigger source Software selectable External digital TRIG_IN Note 1 Maximum throughput scanning to PC memory is machine dependent While the majority of XP equipped PC s we tested allowed acquisition at the maximum rates a few would not The lowest maximum rate we observed on an XP equipped PC during multi channel testing was 95 kS s aggregate The rates specified are for Windows XP only Maximum rates on operating systems that predate XP may be less and must be determined through testing on your machine Note 2 Actual values used for calibration are measured and stored in EEPROM Table 2 Calibrated absolute accuracy Range Accuracy mV 10 V 5 66 5 V 2 98 2 V 1 31 1 V 0 68 4 1 USB 1608FS User s Guide Specifications Table 3 Accuracy components All values are Range of Reading Gain error at FS mV Offset mV 10 V 0 04 4 00 1 66 5 V 0 04 2 00 0 98 2 V 0 04 0 80 0 51 1V 0 04 0 40 0 2
24. ilable on our web site at www mecdag com PDFmanuals sm ul functions pdf MCC s Universal Library for LabVIEW User s Guide is available on our web site at www mecdag com PDFmanuals SM UL LabVIEW pdf USB 1608FS User s Guide this document is also available on our web site at www mcecdag com PDFmanuals USB 1608FS pdf vi Chapter 1 Introducing the USB 1608FS This user s guide contains all of the information you need to connect the USB 1608FS to your computer and to the signals you want to measure The USB 1608FS is part of the Measurement Computing brand of USB based data acquisition products The USB 1608FS is a USB 2 0 full speed device supported under popular Microsoft Windows operating systems It is designed for USB 1 1 ports and was tested for full compatibility with both USB 1 1 and USB 2 0 ports The USB 1608FS offers true simultaneous sampling of up to eight channels of 16 bit single ended analog input This is accomplished through the use of one A D converter per channel The range of each channel is independently configurable via software Eight digital IO lines are independently selectable as input or output A 32 bit counter is capable of counting TTL pulses The USB 1608FS is powered by the 5 volt USB supply from your computer No external power is required A SYNC synchronization control line allows you to synchronize two USB 1608FS modules together to acquire data synchronously fro
25. lave configuration and acquire data synchronously from 16 channels When the SYNC pin is configured as an output the internal A D pacer clock signal is sent to the screw terminal You can output the clock to the SYNC pin of a second USB 1608FS configured for A D pacer input You set the function of the SYNC pin pin 36 for pacer input or pacer output by using nstaCal By default the SYNC pin is set for pacer input To synchronize a master USB 1608FS with a slave USB 1608FS and acquire data from 16 channels follow the steps below 1 RunZnstaCal 2 Double click on the USB 1608FS listing on the PC Board List on the InstaCal main form The Board Configuration dialog displays 3 Configure the SYNC pin of the master USB 1608FS for pacer output o Double click on the USB 1608FS that you want to configure as the master The Board Configuration dialog opens o Click to select the Enable Sync output check box and then click OK v Enable SYNC output 4 Configure the SYNC pin of the slave USB 1608FS for pacer input o Double click on the USB 1608FS that you want to configure as the slave The Board Configuration dialog displays o Make sure that the Enable Sync output check box is not checked unchecked is the default setting Enable SYNC output 5 Connect the SYNC pin on the master USB 1608FS to the SYNC pin on the slave USB 1608FS 3 10 USB 1608FS User s Guide Functional Details EXTCLOCK option with cbAInScan AInScan
26. m 16 analog inputs The USB 1608FS is shown in Figure 1 1 I O connections are made to the screw terminals located along each side of the USB 1608FS Figure 1 1 USB 1608FS 1 1 USB 1608FS User s Guide Introducing the USB 1608FS USB 1608FS block diagram USB 1608FS functions are illustrated in the block diagram shown here USB G2 1 2 5 10 Full speed USB 2 0 Compliant Interface AID 0 N 1 N 1N a iw iw A w DT 1 di aan USB Microcontroller Screw terminal I O connector Screw terminal I O connector TRIG IN AID 7 32 bit Event Counter 1 channel Figure 1 2 USB 1608FS Functional Block Diagram Software features For information on the features of nstaCal and the other software included with your USB 1608FS refer to the Quick Start Guide that shipped with your device The Quick Start Guide is also available in PDF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf Check www mccdag com download htm for the latest software version or versions of the software supported under less commonly used operating systems USB 1608FS User s Guide Introducing the USB 1608FS Connecting a USB 1608FS to your computer is easy Installing a data acquisition device has never been easier The USB 1608FS relies upon the Microsoft Human Interface Device HID class drivers The HID class drivers ship with every copy of Windows that is designed
27. onment Warranty We will replace any product manufactured by Measurement Computing Corporation that is damaged even due to misuse for only 50 of the current list price I O boards face some tough operating conditions some more severe than the boards are designed to withstand When a board becomes damaged just return the unit with an order for its replacement at only 50 of the current list price We don t need to profit from your misfortune By the way we honor this warranty for any manufacturer s board that we have a replacement for 30 Day Money Back Guarantee You may return any Measurement Computing Corporation product within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it Please call for an RMA number first No credits or returns accepted without a copy of the original invoice Some software products are subject to a repackaging fee These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notifi
28. ot port hubs desktop PC s provide up to 500 mA of current for a USB device Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A laptop PC that is not connected to an external power adapter is an example of a battery powered root port hub If your laptop PC is constrained to the 100 mA maximum you need to purchase a self powered hub Note 8 This refers to the total amount of current that can be sourced from the USB 5 V and digital outputs General Device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 Environmental Operating temperature range 0 to 70 C Storage temperature range 40 to 70 C Humidity 0 to 90 non condensing Mechanical Dimensions 79 mm L x 82 mm W x 25 mm H USB cable length 3 meters max User connection length 3 meters max USB 1608FS User s Guide Specifications Main connector and pin out Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Pin Signal Name Pin Signal Name 1 CHO IN 21 DIOO 2 AGND 22 GND 3 CH1 IN 23 DIO1 4 AGND 24 GND 5 CH2 IN 25 DIO2 6 AGND 26 GND 7 CH3 IN 27 DIO3 8 AGND 28 GND 9 CHA IN 29 DIO4 10 AGND 30 GND 11 CH5 IN 31 DIO5 12 AGND 32 GND 13 CH6 IN 33 DIO6 14 AGND 34 GND 15 CH7 IN 35 DIO7 16 AGND 36 SYNC 17 CAL 37 TRIG IN 18 AGND
29. rows of screw terminals one row on the top edge of the housing and one row on the bottom edge Each row has 20 connections Pin numbers are identified in Figure 3 2 Pin 20 Pin 1 MEASUREMENT COMPUTING USB 1608FS NV VETEV VEU i Vae I oo J 2900 DOG Pin 40 Pin 21 Figure 3 2 USB 1608FS screw terminal pin numbers Screw terminal pins 1 20 The screw terminals on the top edge of the USB 1608FS pins 1 to 20 provide the following connections Eight analog input connections CHO IN to CH7 IN Eleven analog ground connections AGND One calibration output terminal CAL Screw terminal pins 21 40 The screw terminals on the bottom edge of the USB 1608FS pins 21 to 40 provide the following connections Eight digital I O connections DIOO to DIO7 One external trigger source TRIG_IN One external event counter connection CTR One power connection PC 5 V One SYNC terminal for external clocking and multi unit synchronization SYNC Fight ground connections GND Main connector and pin out Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG 3 3 USB 1608FS User s Guide Functional Details aa zz OG lt lt oo Cw ooooo0o00o00000000000000 18 AGND 17 CAL 16 AGND 15 CH7 IN 14 AGND 13 CH6 IN 12 AGND 11 CH5 IN 10 AGND 9 CH4IN 8 AGND 7 CH3IN 6 AGND 5 CH21N 4 AGND 3 CH1IN 2 AGND CHO IN 1 oooooooo0O0O00000000000 Q
30. scan mode is 50 kS s each for one two or four channels and 25 kS s each for eight channels 3 1 USB 1608FS User s Guide Functional Details External components The USB 1608FS has the following external components as shown in Figure 3 1 USB connector LED Screw terminal banks 2 Screw terminal Pins 1 to 20 LED Screw terminal Pins 21 to 40 USB connector cable Figure 3 1 USB 1608FS USB connector The USB connector is on the right side of the USB 1608FS This connector provides 5 V power and communication The voltage supplied through the USB connector is system dependent and may be less than 5 V No external power supply is required LED The LED on the front of the USB 1608FS indicates the communication status It uses up to 5 mA of current and cannot be disabled Table 3 1 explains the function of the USB 1608FS LED Table 3 1 LED Illumination When the LED is It indicates Steady green The USB 1608FS is connected to a computer or external USB hub Blinks continuously Data is being transferred Blinks three times Initial communication is established between the USB 1608FS and the computer Blinks at a slow rate The analog input is configured for external trigger The LED stops blinking and illuminates steady green when the trigger is received 3 2 USB 1608FS User s Guide Functional Details Screw terminal wiring The USB 1608FS has two
31. stallation is complete The LED on the USB 1608FS should flash and then remain lit This indicates that communication is established between the USB 1608FS and your computer Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB 1608FS or you may lose data and or your ability to communicate with the USB 1608FS If the LED turns off If the LED is lit but then turns off the computer has lost communication with the USB 1608FS To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn back on 2 2 Chapter 3 Functional Details Theory of operation analog input acquisition modes The USB 1608FS can acquire analog input data in three basic modes software paced continuous scan and burst scan Software paced mode You can acquire one analog sample at a time in software paced mode You initiate the A D conversion by calling a software command The analog value is converted to digital data and returned to the computer You can repeat this procedure until you have the total number of samples that you want from one channel The maximum throughput sample rate in software paced mode is system dependent Continuous scan mode You can acquire data from up to eight channels simultaneously in continuous scan mode The analog data 1s continuously acquired converted to digital values an
32. tart pdf This booklet supplies a brief description of the software you received with your USB 1608FS and information regarding installation of that software Please read this booklet completely before installing any software or hardware Unpacking the USB 1608FS As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the USB 1608FS from its packaging ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge If any components are missing or damaged notify Measurement Computing Corporation immediately by phone fax or e mail Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdaq com 2 1 USB 1608FS User s Guide Installing the USB 1608FS Installing the software Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data Acquisition Software CD This booklet is available in PDF at www mccdaq com PDFmanuals DA Q Software Quick Start pdf Installing the hardware Be sure you are using the latest system software Before you connect the USB 1608FS make sure that you are using the latest versions of the USB drivers Before installing the USB 1608FS download and install the latest Microsoft Windows updates In particular
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