USB 16-CHANNEL ANALOG INPUT MODULE
Contents
1. 9 Figure 1 3 System Calibration Utility screenshot 2 range select 9 Figure 1 4 System Calibration Utility screenshot 3 10 Figure 1 5 System Calibration Utility screenshot 4 gain sssee m 10 Figure 1 6 System Calibration Utility screenshot 5 11 Figure 1 7 System Calibration Utility screenshot 6 finish and 11 Ince EL P 11 Counter Timer a tqon 11 Ordering Guide oon nce aa ase sauce theses IRE MH eerte 12 12 Bit Models 7 3 ee pH and eoa ann tti peu edidere fis tate 12 16 Bit Models ernentecneu toI die 12 Model Options eoo 12 Included with your 12 Optional accessories nne dte e rediere pere d lepus o lage er eee 12 Chapter 2 Installation Rie tei Ree e dede ex e LOI o ded A e eee e LE e ege 13 Software CD Installation encian eene a ren nnn nnne nennen 13 Hardware Installation eiie egi iere eo Ede EH ehe 13 Chapter 3 Hardware Details ssssssssssssssssssseseeee ener entere enne nnne nnne 14 Option Sel2. DIOO DIO7 and high byte DIO8 DIO15 can be individually software configured as inputs or outputs Each DIO line is buffered and capable of sourcing 32mA or sinking 64mA Be sure to consult the Power section for total power limitations before operation By default the DIO lines are pulled up with a 10KO resistor to 5V DIO lines can also be factory configured as pulled down Counter Timer A fully programmable 8254 16 bit counter is provided with the Counter Gate Counter Clock and Counter Output signals brought out to the connector All three signals are buffered and capable of sourcing 32mA or sinking 64mA Be sure to consult the Power section for total 11 Manual USB AI12 16x power limitations before operation The Counter Gate Counter Clock and Counter Output are pulled up with a 10KO resistor to 5V The clock input is software selectable between an internal 10MHz clock and the external Counter Clock The maximum allowed frequency for the clock is 10MHz The highly versatile 8254 contains three independent counter timers Counter 0 is available for general purpose use as described above Counters 1 and 2 are dedicated for use in timing A D starts Ordering Guide This manual primarily describes the 12 Bit versions of this family 16 Bit models are described in their own manual however they are listed here for your reference 12 Bit Models e USB AI12 16A Full feature version 12 Bit 500kHz A D with real time calibration e USB AI1
3. 7 74 eT EE md Figure 5 3 Analog Input Sample screenshot 18 Manual USB AI12 16x Chapter 6 Connector Pin Assignments The I O connector is a 68 pin Type 2 SCSI female right angle type with quick release one touch locking latches which protrudes through a cutout in the module s enclosure s r s s s 17 to 21 22 GND z a a o foo oon 31 GND z s Description Channel Channel 0 Singled ended or 0 differentia Analog Ground Channel Channel 1 Singled ended or 1 differentia Analog Ground Channel Channel 2 Singled ended or 2 differentia Analog Ground Channel Channel 3 Singled ended or 3 differentia Analog Ground Channel Channel 4 Singled ended or 4 differentia Analog Ground Channel Channel 5 Singled ended or 5 differentia Analog Ground Channel Channel 6 Singled ended or 6 differentia Analog Ground Channel Channel 7 Singled ended or 7 differentia Analog Ground Not used Digital Ground Digital I O Bit 14 pulled up Digital I O Bit 12 pulled up Digital I O Bit 10 pulled up Digital I O Bit 8 pulled up Digital I O Bit 6 pulled up Digital I O Bit 4 pulled up Digital Bit 2 pulled up Digital I O Bit 0 Lsb pulled up Digital Ground Output from 8254 ctr tmr pulled up 8254 counter timer clock input pulled up 8254 counter tim
4. calibration between ranges and the default range is therefore entirely suitable for most situations Previous lose Cancel and E xit Figure 1 3 System Calibration Utility screenshot 2 range select 9 Manual USB AI12 16x USB AI12 16 and USB AI15 16 System Calibration Utility OFFSET Apply a value to your sensor which should result in a near minimum scale 70 25 volt reading on Channel 0 Input Type the Expected Value in Volts you are applying Volts This field shows the Current Reading from Channel 0 01 9012 Volts The two values may not match This is normal and is how we will calculate a file that will cause the data to match programmatically nce you ve finished creating and uploading the new calibration data we ll run a simple check to make sure you THEN see the correct data displayed Click Next when you re comfortable with the data shown Previous i Cancel and E xit Figure 1 4 System Calibration Utility screenshot 3 offset USB AI12 16 and USB AI15 16 System Calibration Utility GAIN Apply a value to your sensor which should result in a near full scale 79 75 volt reading on Channel 0 Input Type the Expected Value in Volts you are applying 385 Volts This field shows the Current Reading from Channel 0 The two values may not match This is normal and is how we will calculate a file that will cause the data to match p
5. I O Bit 1 pulled up Digital Ground Digital Ground Enable Analog to Digital Conversion Starts pulled up active high External Analog to Digital Conversion Start Trigger pulled up software selectable rising falling edge Manual USB AI12 16x Chapter 7 Specifications Analog Inputs ADC Type Sampling rate USB AI12 16A USB AI12 16 USB AI12 16E Resolution Number of channels Bipolar ranges Unipolar ranges Board Calibration System Calibration Calibration Hardware USB AI12 16A USB AI12 16 USB AI12 16E Input impedance A D Start Sources A D Start Enable A D Start Types Channel Oversampling Overvoltage protection Crosstalk Digital I O Lines Input voltage Input current Output voltage Output current Successive approximation 500Ksamples sec maximum aggregate 250Ksamples sec maximum aggregate 100Ksamples sec maximum aggregate 12 bit 16 single ended or 8 differential software selectable 1V 2V 5V 10V software selectable 0 1V 0 2V 0 5V 0 10V software selectable Factory installed optional Factory installed optional VREF LOW AGND VREF HIGH 9 90V 0 0299V Program provided to calibrate entire system Calibrated real time output for offset gain errors NONE NONE 1MO Software Start Timer Start and External Start Trigger rising or falling edge software selectable Externally supplied pulled up active high Single Channel or Scan software selectable 0 255 c
6. an alternative to mode for event counting 22 Manual USB AI12 16x Mode 3 Square Wave Generator This mode operates like mode 2 The output is high for half of the count and low for the other half If the count is even then the output is a symmetrical square wave If the count is odd then the output is high for N 1 2 counts and low for N 1 2 counts Periodic triggering or frequency synthesis are two possible applications for this mode Note that in this mode to achieve the square wave the counter decrements by two for the total loaded count then reloads and decrements by two for the second part of the wave form Mode 4 Software Triggered Strobe This mode sets the output high and when the count is loaded the counter begins to count down When the counter reaches zero the output will go low for one input period The counter must be reloaded to repeat the cycle A low gate input will inhibit the counter Mode 5 Hardware Triggered Strobe In this mode the counter will start counting after the rising edge of the trigger input and will go low for one clock period when the terminal count is reached The counter is retriggerable The output will not go low until the full count after the rising edge of the trigger 23 Manual USB AI12 16x Customer Comments If you experience any problems with this manual or just want to give us some feedback please email us at manuals accesio com Please detail any errors you find and include your
7. and System Calibration Board Calibration uses two on board known reference voltages that are accessible by software The first reference voltage measures analog ground while the second reference voltage measures slightly below 10V refer to the specification for exact values The results of sampling both reference voltages can then be used to compare against the known values specified for each reference Differences between the sampled value and the known value provides offset gain error information for correcting these errors in hardware System Calibration uses the System Calibration program provided with the board The System Calibration program is methodically the same as Board Calibration except that the reference voltages are supplied by the user on analog input channel 0 The advantage of System Calibration over Board Calibration is the ability to calibrate out offset gain and other errors for the entire system The system can include such devices as sensors signals conditioners etc These components contribute to errors in the system Calibrating using the System Calibration program accounts for the gain offset errors of the board AND the errors from the system it is connected to Only A models contain hardware to calibrate the output of the ADC This hardware can be used by both Board Calibration and System Calibration Either method creates a file containing offset gain and other errors refer to the software reference manual for the f
8. eda cT Seid 21 I dunt 21 Appendix Co nter Timert 2 oe he pee E SERE Ea 22 Operational Modes oie Interea Dc efte adco Y aga odas ie px age eed Re YER an CNET a 22 cece ee Dc etae e A lene ed e e da dde eeu deeds ase 24 4 Manual USB AI12 16x Chapter 1 Introduction This USB based Data Acquisition Module is an ideal solution for adding portable easy to install high speed analog input and digital I O capabilities to any computer with a USB port The unit is a USB 2 0 high speed device and requires a USB 2 0 port to function Features e High speed USB 2 0 device e 12 bit resolution e Sampling rate USB AI12 16A 500Ksamples sec maximum aggregate USB AI12 16 250Ksamples sec maximum aggregate USB AI12 16E 100Ksamples sec maximum aggregate e 16 single ended or 8 differential analog inputs software selectable e System Calibration Program provided to calibrate entire system e Calibration Hardware USB AI12 16A Calibrated real time output for offset gain errors USB AI12 16 NONE USB AI12 16E NONE e Ranges of 0 1V 0 2V 0 5V 0 10V x1V x2V 5V 10V software selectable per channel e Start sources Software Timer and External Trigger rising or falling edge software selectable e A D Modes Single Channel or Scan e Noise reduction with Channel Oversampling e Over voltage protection of
9. mailing address so that we can send you any manual updates ACCES 1 0 PRODUCTS INC 10623 Roselle Street San Diego CA 92121 Tel 858 550 9559 FAX 858 550 7322 www accesio com 24 Manual USB AI12 16x
10. to it is best to verify the USB port s power capabilities before operation This card according to the USB 2 0 spec is a high powered device An optional external power supply can be ordered if the USB port cannot support high powered devices If using more than a total of 500mA use optional 9 VDC on board voltage regulator outputs 5 VDC to card external power supply and remove VUSB jumper and place jumper on VEXT Then plug in external power before plugging into USB port This option will give you a total of 1000mA available 21 Manual USB AI12 16x Appendix A Counter Timer This board contains a 82C54 16 bit counter timer It can be programmed to any count as low as 1 or 2 and up to 65 536 depending on the mode chosen For those interested in more detailed information a full description can be found in the Intel or equivalent manufacturer s data sheet provided in the chipdocs directory on the Software Master CD In addition the driver and firmware on the board requires a full 16 bit load operation do not select low byte only or high byte only modes for the counters Additional low level information on the 82C54 can be found on the Software Master CD in the chipdocs directory Operational Modes The 8254 modes of operation are described in the following paragraphs to familiarize you with the versatility and power of this device For those interested in m ore detailed information a full description of the 82
11. 2 16 Standard version 12 Bit 250kHz with software calibration e USB AI12 16E Economy version 12 Bit 100kHz with software calibration 16 Bit Models e USB AI16 16A Full feature version 16 Bit 500kHz with real time calibration e USB AI16 16E Economy version 16 Bit 250kHz with software calibration Model Options e P External AC DC adapter power jack regulator installed OEM Board only no enclosure DIN DIN rail mounting provision T Extended Temperature Operation 40 to 85 C 50 x special number designator contact factory 4 20mA or 10 50mA inputs 16 current inputs when factory configured as single ended 8 current inputs when factory configured as differential DIO lines can be configured with pull down resistors Included with your board The following components are included with your shipment Please take time now to ensure that no items are damaged or missing 1 USB AI12 16x unit installed in labeled enclosure 2 6 USB cable 3 Software Master CD PDF user manual installed with product package 4 Printed USB I O Quick Start Guide Optional accessories e C68PS18L 68 Pin SCSI 18 shielded cable with one touch latches e STB 68 Screw Terminal Board mounted on standoffs e CUSB MINI 6 USB Cable with type A connector and mini OTG connector for embedded applications mates with P4 on the board 12 Manual USB AI12 16x Chapter 2 Installation Software CD Installation The software p
12. 40V to 55V e 16 high current Digital I O lines e 16 bit programmable counter timer e PC 104 module size and mounting compatibility e Small 4 4 x 1 25 rugged industrial enclosure e Miniature USB connector for embedded applications Applications e Equipment monitoring e Environmental measurements e Embedded data acquisition e Education Laboratory Functional Description This product is a USB based Analog to Digital converter board with 16 single ended or 8 differential analog inputs Inputs can either be voltages or optionally 4 20mA The board is capable of sampling speeds up to 500K 250K or 100K samples sec depending on model Sampling can be enabled disabled via an I O connector pin by an external signal Analog input channels are enabled as a consecutive set by software Each channel within the set is independently configured by software to accept one of eight different analog input ranges Analog to digital conversion starts or A D starts are issued one of three ways Software Start Timer Start or External Trigger Start A D starts are software configured to be either rising or falling edge Additionally A D starts are software configured to be Single Channel or Scan Single Channel samples data once from the next consecutive channel within the enabled set A Scan samples data from all channels within the set at the fastest possible rate To minimize noise the board implements a technique called Oversampling High accuracy is
13. 54 programmable interval timer can be found in the Intel or equivalent manufacturers data sheets The following conventions apply for use in describing operation of the 8254 Clock A positive pulse into the counter s clock input Trigger A rising edge input to the counter s gate input Counter Loading Programming a binary count into the counter Mode 0 Pulse on Terminal Count After the counter is loaded the output is set low and will remain low until the counter decrements to zero The output then goes high and remains high until a new count is loaded into the counter A trigger enables the counter to start decrementing Mode 1 Retriggerable One Shot The output goes low on the clock pulse following a trigger to begin the one shot pulse and goes high when the counter reaches zero Additional triggers result in reloading the count and starting the cycle over If a trigger occurs before the counter decrements to zero a new count is loaded This forms a retriggerable one shot In mode 1 a low output pulse is provided with a period equal to the counter count down time Mode 2 Rate Generator This mode provides a divide by N capability where N is the count loaded into the counter When triggered the counter output goes low for one clock period after N counts reloads the initial count and the cycle starts over This mode is periodic the same sequence is repeated indefinitely until the gate input is brought low This mode also works well as
14. achieved with a real time 5 Manual USB AI12 16x internal calibration system or software calibration depending on model which allows the card to adjust for offset gain errors at runtime giving a more precise reading Also provided are 16 Digital I O lines in 2 groups of 8 lines Both Digital I O bytes are individually software selectable as input or output A fully programmable 8254 16 bit counter is provided with a maximum input frequency of 10MHz The clock gate inputs and output can be accessed externally for extended functionality The complete unit is designed for use in rugged industrial environments but is compact enough to fit nicely onto any desk or testing station The board is PC 104 sized 3 550 by 3 775 inches with mounting capability and ships standard inside a steel powder coated enclosure with an anti skid bottom CALIBRATION O V e 5 an uj inst 08 m 2 Ld A Bi N 1 500 250 or 100KS s 2 a Control Lines 8051 Style Microcontroller 68Pin SCSI High Density Connector USB 2 0 BUS Figure 1 1 Block Diagram 6 Manual USB AI12 16x Analog Inputs There are a total of 16 single ended or 8 differential analog inputs on this board A consecutive set of channels are enabled disabled by software This set of channels is constructed by a start and end channel Sampling begins on the start cha
15. annels Scan on the other hand will sample all the channels within the enabled set per A D Start Channels are sampled at 500KHz 250KHz or 100KHz depending on model to minimize the time skew between channels 7 Manual USB AI12 16x Oversample Oversampling is a technique which continuously samples a channel multiple times at the maximum A D speed of your particular model Quickly taking several samples from the same channel allows the signal to be averaged Averaging a signal can greatly reduce the noise injected by both the signal and the board system The oversample range is from to 255 software selectable and applies to every channel within the enabled set A channel is always sampled once plus the number of oversamples that was configured Therefore an oversample of 0 will sample a channel once initial sample plus 0 oversamples oversample of 1 will sample a channel twice initial sample plus 1 oversample up to an oversample of 255 which will sample a channel 256 times initial sample plus 255 oversamples Each channel s oversamples are taken before sampling begins on the next consecutive channel within the enabled set Calibration All ADC s suffer from offset and gain errors To account for this the board implements calibration methods to adjust for the offset gain errors This is particularly helpful as aging occurs and or operating temperature changes There are two methods available to calibrate Board Calibration
16. ection ene d eie Ee E EH ue e dee dede del de eee ev Rd a ud ce 14 Figure 3 1 Option Selection eene enne enne enn n entere en e nnne nns 14 USB Connector oce dene ete is a de Tee deer 15 Embedded USB Connector 4 nni nii 15 Md DET 15 DC Power Jack Optiorial nee ee tepore eet eoo ve Het e DARET eet re ETE 15 68 PINTVO CONNECTOR 41 S gest eine eite eth po er ode bcc eb E ede tae TOR da 15 Chapt r 4 USB Address Information eee tie dre o et ee eee eL 16 Chapter 5 Programming Aa 2 rie tot re HR Ta naa Ea rd al tire eret RA 17 SanipleProgramis leet lec p n td rait e 17 Figure 5 1 DIO Sample sereenshot 1 tite ettet aM eec tette AAEE eet edu be este 17 Figure 5 2 DIO Sample screenshot 2 e iei tte ka eni etui ees b ute abe ee enc 18 Figure 5 3 Analog Input Sample screenshot ssssssssssssseee eene rne 18 Chapter 6 Connector Pin Assignments a nennen nnne nnns 19 Chapter 7 Specifications oie dp LER 20 Analog Inputs 25 i ge a ees iiu enti Bl uceeba daa cede ege uud deus do ce uod ide 20 Digital ere 20 Counter TImer sores Fae ei dae dde tva
17. er gate input pulled up active high non inverting input non inverting input non inverting input non inverting input non inverting input non inverting input non inverting input non inverting input 33 fo Ch12 SE Ch4 DIFF 44 AGND Ch13 SE Ch5 DIFF e me 51 to 55 56 57 1015 58 1013 59 1011 61 107 62 105 63 103 64 101 65 67 GQjio ojog ojo z iz z D Start Enable External Trigger Description Channel 8 Single ended or Channel 0 differential inverting input Analog Ground Channel 9 Single ended or Channel 1 differential inverting input Analog Ground Channel 10 Single ended or Channel 2 differential inverting input Analog Ground Channel 11 Single ended or Channel 3 differential inverting input Analog Ground Channel 12 Single ended or Channel 4 differential inverting input Analog Ground Channel 13 Single ended or Channel 5 differential inverting input Analog Ground Channel 14 Single ended or Channel 6 differential inverting input Analog Ground Channel 15 Single ended or Channel 7 differential inverting input Analog Ground Not used Digital Ground Digital I O Bit 15 Msb pulled up Digital I O Bit 13 pulled up Digital I O Bit 11 pulled up Digital I O Bit 9 pulled up Digital I O Bit 7 pulled up Digital I O Bit 5 pulled up Digital I O Bit pulled up Digital
18. gative offset of the ADC Each channel input has an over voltage protection of 40V to 55V A D Start This board offers three software selectable sources for A D Start Software Start Timer Start and External Start Trigger Software Start generates an A D Start every time the software command is issued The maximum frequency for a Software Start is roughly 4KHz Timer Start uses the on board timer to generate an A D Start Frequencies ranging from 2 33 10 Hz to 500KHz are possible with Timer Start External Start Trigger uses the External Trigger pin on the connector to generate an A D Start Frequencies up to 500KHz are allowed for External Start Trigger A D Start is also software configured as rising or falling edge Furthermore it can be disabled by driving the A D Start Enable pin on the connector low By default this signal is pulled high and A D Start is enabled If A D Start Enable goes low during a conversion the current channel plus any oversampling refer to the Oversample section will complete all its conversions before A D Start is disabled Once A D Start Enable returns high conversions will begin on the next successive channel within the enabled set upon the following A D Start An A D Start can be one of two software selectable types for this board Single Channel or Scan A D Starts that are Single Channel sample one channel within the enabled set per A D Start This allows for total control over the time skew between ch
19. ile format This calibrated information within the file is then loaded onto the board and used by calibration hardware At this point the ADC output is real time with respect to the last time either Board or System Calibration was run There also exists a function in software that when called will automatically run Board Calibration and store the calibrated information onto the board For optimum calibrated data calibration should be repeated anytime the temperature or environment changes Board Calibration can be performed in milliseconds and is recommended to be performed periodically 8 Manual USB AI12 16x USB Al1 2 16 and USB Al16 16 System Calibration Utility System Calibration Utility This utility will 1 Perform an autocalibration of the board 2 Allow you to specify what SHOULD be seen in comparison to what 5 seen for both near Zero offset and near Full Scale Gain errors 3 Create a new Calibration file that will CAUSE the hardware to return what you ve specified instead of what the autocal decided to show By performing these steps you can calibrate MORE than just the board you calibrate the sensors the screw terminal accessories etc Single Ended Differential If there is a specific range gain setting you would like to optimize your calibration for select it here Be aware the high precision gain amplifier used in this product should show little variation in
20. ing or issuing credit at ACCES discretion for any products which are proved to be defective during the warranty period In no case is ACCES liable for consequential or special damage arriving from use or misuse of our product The customer is responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or if in ACCES opinion the equipment has been subjected to abnormal use Abnormal use for purposes of this warranty is defined as any use to which the equipment is exposed other than that use specified or intended as evidenced by purchase or sales representation Other than the above no other warranty expressed or implied shall apply to any and all such equipment furnished or sold by ACCES 3 Manual USB AI12 16x TABLE OF CONTENTS Chapter 1 Introduction iren oie Sa e ae E de Ha ert qe Mate eee age Les 5 uu rd EET 5 Applications eee ean Be 5 Functional ore eoi er OO GRE eru C er o be ee 5 Figure T T Block Diagram remote e dee tro aet dt eta ete ener cor tco te da d 6 Analog Ihp ls 2 ooi etm ro DL Rep den t des EP I ero De LO eee ree 7 A D Start t e et 7 Oversample 1 a onte ertt ete teen efe odii f ed Tree 8 Calibration 0x onn teo adr e or 8 Figure 1 2 System Calibration Utility screenshot 1
21. nnel and continues through every successive channel until the end channel is sampled Once the end channel has been sampled the process repeats again from the start channel If only one channel is being sampled the start and end channels would be the same Each channel within the set is individually software configured as either single ended or differential This board allows a mix of both single ended and differential inputs One must note however that a differential signal requires a pair of channels Thus when channel 0 is programmed as a differential input both channels 0 and 8 are used and not available as singled ended inputs Refer to the connector pin assignment chapter for single ended and differential pair inputs Optionally resistors can be factory installed on selected channels to allow for 4 20mA or 10 50mA analog inputs Again a mix of single ended and differential inputs are possible but they are factory configured as static hardware dependent and cannot be changed by software 8 input ranges 4 bipolar and 4 unipolar are selectable by software for each individual channel This channel by channel flexibility allows for up to 8 different input ranges being acquired on a single board The unipolar ranges are 0 1V 0 2V 0 5V and 0 10V The bipolar ranges are 1 2V 5V and 10V Each channel input has a slight positive bias to facilitate measurement of signals close to analog ground no signal information is lost due to ne
22. ns complete the driver package For detailed information on each function refer to the html Driver Manual located in the Win32 directory for this board unsigned long GetDevices void unsigned long QueryDevicelnfo Devicelndex pPID pName pDIOBytes pCounters Sample Programs Sample programs are useful to check out initial operation of the board as well as aiding in the understanding of the programming techniques used as source code is always provided This first screenshot illustrates what controls and indicators are provided for the digital I O portion of the board The indicates the bit is high or a 1 You would read a high on the associated connector pin with a voltage meter USB Al16 16 DIO Sample Digital 170 Fort Figure 5 1 DIO Sample screenshot 1 17 Manual USB AI12 16x This screenshot shows Port A DIO bits O through 7 has been selected as Outputs with even numbered bits being controlled low sinking current as indicated by the black O USB Al16 16 DIO Sample Digital 1 0 Port Port B D ET MEM IE gn e co IE TO Figure 5 2 DIO Sample screenshot 2 r Mainor M Calib File Ch 0 0 01 y D 0 0 0 0 0 0 0 v2008 01 24 10 00 bin 1 Cyr Oe Oe e sco om Dem y p Analog Range Ch Be z ee 2 1 26 D 1 1 1 1 Of 8 1 GU Ch 3 1 86 mavj p 3 msani i o Ch T1 Ch 12
23. onsecutive samples channel software selectable 40 to 55V No crosstalk present below 400KHz 60dB 500KHz 16 programmable as inputs or outputs in groups of 8 pulled up Logic low OV min to 0 8V max Logic high 2V min to 5V max 20 max Logic low OV min to 0 55V max Logic high 2V min to 5V max Logic low 64mA max sink Logic high 32mA max source 20 Manual USB AI12 16x Counter Timer Type Available Counters Input Frequency Counter size Clock Clock Period Clock Pulse Width High Clock Pulse Width Low Gate Output Input Output Voltage Current Environmental Operating Temperature Storage Temperature Humidity Board Dimensions Power required 82C54 programmable interval counter Counter 0 10MHz max 16 bit Internal 10MHz or Externally supplied software selectable pulled up 100ns min 30ns min 40ns min Externally supplied pulled up active high External pulled up Same as Digital I O 0 to 70 C optional 40 to 85 C 40 to 105 C 5 to 90 RH without condensation PC 104 format 3 550 by 3 775 and mounting holes 5V at 330mA typ USB 2 0 spec defines a device in terms of a unit load A unit load is defined to be 100mA Devices drawing an absolute maximum of one unit load is considered to be low powered and devices drawing an absolute maximum of five unit loads is considered to be high powered Because this spec is not strictly adhered
24. pt service and support will be available All equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced subject to the following considerations Terms and Conditions If a unit is suspected of failure contact ACCES Customer Service department Be prepared to give the unit model number serial number and a description of the failure symptom s We may suggest some simple tests to confirm the failure We will assign a Return Material Authorization RMA number which must appear on the outer label of the return package All units components should be properly packed for handling and returned with freight prepaid to the ACCES designated Service Center and will be returned to the customer s user s site freight prepaid and invoiced Coverage First Three Years Returned unit part will be repaired and or replaced at ACCES option with no charge for labor or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipments lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms and conditions of the respective equipment manufacturer s warranty General Under this Warranty liability of ACCES is limited to replacing repair
25. rogrammatically nce you ve finished creating and uploading the new calibration data we ll run a simple check to make sure you THEN see the correct data displayed Click Next when you re comfortable with the data shown Previous lL ose Cancel and E xit Figure 1 5 System Calibration Utility screenshot 4 gain 10 Manual USB AI12 16x USB AI12 16 and USB AI16 16 System Calibration Utility Confirm Calibration by applying any desired inputs to your sensor and verifying the displayed value 1555 10D5 below You may need to convert to engineering 1556 gt 1006 units manually display is in Volts 1557 10D7 1558 10D8 1559 gt 100 1554 gt 1008 155B gt 10DC This field shows the Current Reading from Channel 0 155C gt 10DD 9 84953 Volts 155D gt 10DE 155 gt 10DF E RES ete Figure 1 6 System Calibration Utility screenshot 5 confirmation USB AI12 16 and USB AI15 16 System Calibration Utility The calibration data you have created must now be saved to a unique filename for later use by your When you later write your code use this filename in the ADC SetCal function call usgan 642008 01 24 10 00 bin Browse Previous Cancel and E xit Figure 1 7 System Calibration Utility screenshot 6 finish and save Digital I O There are 16 Digital I O lines DIOO to DIO15 available on this board Both the low byte
26. rovided with this board is contained on one CD and must be installed onto your hard disk prior to use To do this perform the following steps as appropriate for your operating system Substitute the appropriate drive letter for your drive where you see D in the examples below WIN98 Me 2000 XP 2003 a Place the CD into your CD ROM drive b The CD should automatically run the install program If the install program does not run click START RUN and type SUUNSA click OK or press C Follow the on screen prompts to install the software for this board LINUX a Please refer to linux htm on the CD ROM for information on installing under linux Hardware Installation Please install the software package before plugging the hardware into the system The board can be installed in any USB 2 0 port Please refer to the USB I O Quick Start Guide which can be found on the CD for specific quick steps to complete the hardware and software installation 13 Manual USB AI12 16x Chapter 3 Hardware Details Option Selection You may also refer to the setup program installed from the CD provided with the board The only user selectable hardware option available is VUSB vs VEXT which selects between USB powered or Externally powered VUSB POWER FROM USB 8 19 9 24 Figure 3 1 Option Selection Map 14 Manual USB AI12 16x USB Connector P1 The USB connector available via the outside of the enclosure is a Type B and ma
27. tes with the six foot cable provided The USB port provides communication signals along with 5 VDC power The board can be powered from the USB port or an optional external power supply can be used Embedded USB Connector P4 In applications where the OEM board only no enclosure version of this board is used it may be desirable to use the miniature USB connector onboard which is next to and in parallel with the Type B connector LED The LED on the front of the enclosure is used to indicate power and data transmissions When the LED is in an illuminated steady green state this signifies that the board is successfully connected to the computer and has been detected and configured by the operating system When the LED flashes continuously this signifies that there is data being transmitted over the USB bus DC Power Jack Optional Please note not all boards will contain this option This is an option for high current applications when more current is needed than what your computer can provide on the USB port typically 500 mA The DC jack has a 2 00mm post on board and is designed to be used with the 9 VDC AC DC external power supply that ships with this option The voltage regulator on board regulates the 9 VDC and provides 5 VDC to the onboard circuitry When using external power switch the jumper located near the USB connector to VEXT otherwise when the jumper is in the VUSB position current is drawn from the USB port please consult
28. the option selection map for a visual reference 68 PIN I O CONNECTOR J1 The I O is accessed via a 68 pin female SCSI Pin in Socket type connector with one touch lock latches Detailed pin assignments are listed in chapter 6 as well as a handy reference of pin functions printed on the enclosure label 15 Manual USB AI12 16x Chapter 4 USB Address Information Use the provided driver to access the USB board This driver will allow you to determine how many supported USB devices are currently installed and each device s type This information is returned as a Vendor ID VID Product ID PID and Device Index The board s VID is Ox1605 and its PID is Ox8040 The Device Index is determined by how many of the device you have in your system and can provide a unique identifier allowing you to access a specific board at will See the Software Reference Manual installed on your system along with the board support package for more information 16 Manual USB AI12 16x Chapter 5 Programming The driver software provided with the board uses a 32 bit dll front end compatible with any Windows programming language Samples provided in Borland C Builder Borland Delphi Microsoft Visual Basic and Microsoft Visual demonstrate use of the driver Many functions are provided by the driver in Windows These functions will allow you to read or write to the board In addition counter timer functionality and board level functio
29. ya ACCES I O PRODUCTS INC 10623 Roselle Street San Diego CA 92121 858 550 9559 Fax 858 550 7322 contactus Qaccesio com www accesio com USB 16 CHANNEL ANALOG INPUT MODULE MODEL USB Al12 16x USER MANUAL File MUSB AI12 16x B1a Distributed by EUROPE Notice The information in this document is provided for reference only ACCES does not assume any liability arising out of the application or use of the information or products described herein This document may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of ACCES nor the rights of others IBM PC PC XT and PC AT are registered trademarks of the International Business Machines Corporation Printed in USA Copyright 2008 by ACCES I O Products Inc 10623 Roselle Street San Diego CA 92121 All rights reserved WARNING ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF ALWAYS TURN COMPUTER POWER OFF BEFORE INSTALLING A BOARD CONNECTING AND DISCONNECTING CABLES OR INSTALLING BOARDS INTO A SYSTEM WITH THE COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I O BOARD AND WILL VOID ALL WARRANTIES IMPLIED OR EXPRESSED 2 Manual USB AI12 16x Warranty Prior to shipment ACCES equipment is thoroughly inspected and tested to applicable specifications However should equipment failure occur ACCES assures its customers that prom
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