USB-1208HS User's Guide
Contents
1. 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 The throughput sample rate in software paced mode is system dependent and can range from 33 S s to 4000 S s Continuous scan mode You can acquire data from up to eight channels in continuous scan mode The analog data is continuously acquired converted to digital values and written to an onboard FIFO buffer on the USB 1208HS until you stop the scan The FIFO buffer is serviced in blocks as the data is transferred from the USB 1208HS FIFO buffer to the memory buffer on your computer The maximum sampling rate is 1 MS s aggregate over one to eight channels You can start a continuous scan with either a software command or with an external hardware trigger event External components The USB 1208HS has the following external components as shown in Figure 2 Screw terminal banks two USB connector LEDs d 29 56 Pins 1 28 Activity LED connector Figure 2 USB 1208HS external components 10 USB 1208HS User s Guide Functional Details USB connector The USB connector provides 5 V power and communication No external power supply is required Activity LED The Activity LED indicates the commu2. Differential mode all ranges 78 dB typical 18 USB 1208HS User s Guide Specifications Table 2 Calibrated absolute accuracy Range Accuracy mV 20 V differential mode 9 55 typical 13 18 maximum 10 V differential mode 4 59 typical 6 23 maximum 5 V differential mode 2 25 typical 2 75 maximum 10 V single ended mode 5 10 typical 8 06 maximum 5 V single ended mode 2 63 typical 4 03 maximum 2 5 V single ended mode 1 59 typical 2 70 maximum 0 10 V single ended mode 3 29 typical 5 13 maximum Table 3 summarizes the noise performance for the USB 1208HS Noise distribution is determined by gathering 50 kS with inputs tied to ground at the user connector Samples are gathered at the maximum specified sampling rate of 1 MS s Table 3 Noise performance Range Typical counts LSBrms 20 V differential mode 3 0 45 10 V differential mode 3 0 45 5 V differential mode 3 0 45 10 V single ended mode 5 0 91 5 V single ended mode 5 0 91 2 5 V single ended mode 5 0 91 0 10 V single ended mode 5 0 91 Table 4 Input settling time in us typical Condition Range 1LSB 4LSB 8LSB full scale to full scale channel switch same range to same range 10 V 1 5 1 1 1 0 5 V 2 1 1 1 1 0 i2 5V 2 2 1 1 1 0 0
3. 10 V 2 6 1 1 1 0 Digital input output Table 5 Digital I O specifications Digital type CMOS Number of I O 16 Configuration Each bit may be configured as input power on default or output Pull up configuration The port has 47 kQ resistors configurable as pull ups or pull downs via internal jumper default setting is pull down Digital I O transfer rate system paced 33 to 8000 port reads writes or single bit reads writes per second typical system dependent Input high voltage 2 0 V minimum 5 5 V absolute maximum Input low voltage 0 8 V maximum 0 5 V absolute minimum 0 V recommended minimum Output high voltage 4 4 V minimum IOH 50 uA 3 76 V minimum IOH 24 mA Output low voltage 0 1 V maximum IOL 50 uA 0 44 V maximum IOL 24 mA Output current 24 mA maximum per terminal see Power section for additional information 19 USB 1208HS User s Guide Specifications External trigger Table 6 External trigger specifications Parameter Specification Trigger source TRIG input Trigger mode Software configurable for edge or level sensitive rising or falling edge high or low level Power on default is edge sensitive rising edge Trigger latency 1 us 1 clock cycle maximum Trigger pulse width 100 ns minimum Input type Schmitt Trigger 33 Q series resistor and 47 kQ pull down to grou
4. EE EEEE ai ITE aatia 9 Calibrating the USB 1208HS nce teer eie ede eiie indie de E Peces 9 Chapter 3 Functional Details 42 tue dude de eei e cedet utes 10 Theory of operation analog input acquisition modes sssssssssssseeeeeeeneneenenr ene 10 Software paced mode ns etes esed se iion iive nae aine eeu e de iebssd dacuticcedecchcssdaacbadecadescedcesutedededebsad da ere ge docu 10 Continuous scarimode scs ane c i et ertt b po od ae a a Bebe tot oe es e poene e be co EUR US 10 External components x xa oa des e He e en Ro Eee e P us 10 USB Gonnectot oer eh T LE Er ec dO o D dee e ei Pee iba Ue eb edo eee ae ait des 11 Activity LED did Stat s EBD zc ascetur eee FOE TP TERRE UNE ede idet e rt Pen ERR Og ete decd avas Urt tele PN eee exea PO US Screw terminal ssc C 11 Analog imput terminals 7x eoe wt de Ge te OLET Set one eI A tee cs 12 Wi vo nilicUNI EC X B 12 External clock VO terminals 4 eee tete dece einen Net en ed o ete eds 13 Digital O termiia ls ai ce tree t e RS II RES E ERU RENT RISERVA 13 Internal pull up pull down capability eese enne nenne enne tnet teen enne nene 14 Counter LO termmals unte tne a S tte ive tert ive berti m vie e tont sere t 16 Timer output termin l c sette te hi ee AREA ehe de ee 16 Trigger put termitial ctr tree i RU REC IT ENSE ERU
5. Specifications Power Table 11 Power specifications Parameter Operating modes Conditions Specification Bus powered USB 5 V supply see Note 2 Supply current see Note 1 Suspend mode lt 2 5mA Enumeration lt 100 mA Run mode lt 500 mA Power consumption excluding Run mode 1 05 W maximum 210 mA input current analog and digital outputs Power available for 5 V Run mode 1 45 W maximum AICKO TMR digital I O The total power consumption for all external loads must be less than this value and each load must meet the individual specification for the terminal Digital output power calculation Power per output Iout 5 V for example 24 mA P 0 024 5 120 mW output 5 V output power calculation Power W Iout 5 V 5 V output voltage range Run mode 4 5 V minimum 5 25 V maximum Suspend mode enumeration OV 5 V output current Run mode no other output loads 290 mA maximum 1 45 W Fuses On USB supply 0452 750 Littelfuse 0 750A NANO2 Slo Blo Subminiature Surface Mount Fuse Spare fuse mounted in holder on PCB Note 1 This is the total current consumption for the USB 1208HS including 5 V and digital output currents Note 2 Output voltage range assumes input power is within specified limits USB specifications Table 12 USB specifications USB device type USB 2 0 high speed USB device compatibility US
6. be repaired replaced with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Warranty Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of the current list price I O boards face some harsh environments some harsher than the boards are designed to withstand Contact MCC to determine your product s eligibility for this program 30 Day Money Back Guarantee Any Measurement Computing Corporation product may be returned 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 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 notified in advance of the possibility of such damages Trademark and Copyright Information TracerDAQ Universal Library Harsh Environment Warranty Measurement Computi
7. setting at power up is edge sensitive rising edge Retrigger The acquisition uses the trigger settings for positive edge negative edge and level sensitive edge sensitive but automatically re arms the trigger after it is activated USB 1208HS User s Guide Functional Details Power terminals You can use the two 5V connections to supply power to external devices or circuitry These terminals can output up to 285 mA Refer to the pinout diagram on page 11 for the location of this pin Caution The 5V terminals are outputs Do not connect to an external power supply or you may damage the USB 1208HS and possibly the computer Analog ground terminals The 10 analog ground AGND connections provide a common ground for all analog I O channels Refer to the pinout diagram on page 11 for the location of the AGND terminal pins Common ground terminals The six ground GND connections provide a common ground for the digital I O timer counter I O timer clock I O and the 5 V terminals Refer to the pinout diagram on page 11 for the location of the GND terminals 17 Chapter 4 Specifications All specifications are subject to change without notice Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input Table 1 Analog input specifications Parameter Conditions Specification A D converter Analog Devices AD7329 13 bit successive approxim
8. turn your computer on and connect the USB cable to a USB port on your computer or to an external USB hub connected to your computer The USB cable provides power and communication to the USB 1208HS When you connect the USB 1208HS for the first time a Found New Hardware dialog opens when the USB 1208HS interface is detected The Status LED on the USB 1208HS turns on at this time indicating the USB 1208HS is detected and installing on your computer When the dialog closes the installation is complete Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB 1208HS or you may lose data and or your ability to communicate with the USB 1208HS If the Status LED turns off If the Status LED lights up but then turns off the computer has lost communication with the USB 1208HS To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should light up again Calibrating the USB 1208HS The USB 1208HS is shipped fully calibrated Calibration coefficients are stored in EEPROM Return the device to Measurement Computing Corporation when calibration is required The normal calibration interval is once per year Chapter 3 Functional Details Theory of operation analog input acquisition modes The USB 1208HS can acquire analog input data in two basic modes software paced and continuous scan
9. 00 E mail info mccdaqg com www mccdag com
10. 2 0 high speed D D USB A D Clock In FIFO Bus interface A D Clock Out D A Clock In D A Clock Out Vsus 5V Counter In 0 ounter In 1 ENABLEs Nr Timer Out y x16 iwise ili pe Branson 16 5V Protection prog DIO 16 5V Power 12V supplies 3 3V 5V For information on the features of nstaCal and the other software included with your USB 1208HS refer to the Quick Start Guide that shipped with your device The Quick Start Guide 1s also available in PDF at www mccdaq com PDFmanuals DA Q Software Quick Start pdf Check www mccdag com download htm for the latest software version Chapter 2 Installing the USB 1208HS What comes with your USB 1208HS shipment As you unpack your USB 1208HS verify that the following components are included Hardware USB 1208HS 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 mcecdag com PDFmanuals DA Q Software Quick Start pdf This booklet supplies a brief description of the software you received with your USB 1208HS and information regarding installation of that software Please read this booklet completely before installing any software or hardware Unpacking the USB 1208HS As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the USB 1208HS from its packaging ground yourse
11. 4 Single ended measurement connection 12 USB 1208HS User s Guide Functional Details The following image depicts a Wheatstone bridge signal source connected to a USB 1208HS configured for differential mode Figure 5 Differential measurement connection 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 External clock I O terminals Use the AICKI terminal to receive a sampling clock from an external source Use the AICKO terminal to output the internal A D sampling clock When using an external clock a pulse output generated by the external clock rising edge is also available at these terminals Digital I O terminals You can connect up to 16 digital I O lines to screw terminals DIOO through DIO15 Refer to the pinout diagram on page 11 for the location of these pins The 16 DIO terminals have 47 k resistors that you can configure for pull up pull down using a jumper inside the case The default configuration is pull down You can use the USB 1208HS digital I O terminals to detect the state of any TTL level input Refer to the switch circuit shown in Figure 6 and the schematic shown in Figure 7 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 13 USB 1208HS User s Guide Func
12. B 1 1 2 0 USB cable length 5 meters maximum USB cable type A B cable UL type AWM 2527 or equivalent minimum 24 AWG VBUS GND minimum 28 AWG D D Environmental Table 13 Environmental specifications Operating temperature range 0 to 50 C Storage temperature range 40 to 85 C Humidity 0 to 90 non condensing Mechanical Table 14 Mechanical specifications Dimensions 127 mm L x 88 9 mm W x 35 56 H USB 1208HS User s Guide Specifications Main connector and pin out Table 15 Main connector specifications Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Table 16 Main connector pin out Pin Signal name Pin Signal name 1 AINO 29 NC 2 AGND 30 NC 3 AIN1 31 AGND 4 AGND 32 NC 5 AIN2 33 NC 6 AGND 34 AGND 7 AIN3 35 AICKI 8 AGND 36 AICKO 9 AIN4 37 NC 10 AGND 38 NC 11 AIN5 39 TRIG 12 AGND 40 GND 13 AING 41 CTRO 14 AGND 42 CTR1 15 AIN7 43 TMR 16 AGND 44 GND 17 empty 45 empty 18 5V 46 5V 19 GND 47 GND 20 DIOO 48 DIO8 21 DIO1 49 DIO9 22 DIO2 50 DIO10 23 DIO3 51 DIO11 24 DIO4 52 DIO12 25 DIO5 53 DIO13 26 DIO6 54 DIO14 27 DIO7 55 DIO15 28 GND 56 GND 23 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 95
13. Replace the top section of the case and then fasten it to the bottom section with the four screws 15 USB 1208HS User s Guide Functional Details 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 mccdaq com signals signals pdf Counter I O terminals The terminals provide connections to each 32 bit counter input channel CTRO and CTR1 Each counter can count frequencies of up to 20 MHz Timer output terminal Use the TMR terminal to connect to the pulse width modulation PWM timer output You can set the following timer output parameters through software pulse frequency duty cycle pulse width divided by the pulse period number of pulses to generate time delay before starting the timer output after it s enabled resting state of the output idle high or idle low The timer can generate a pulse output with a programmable frequency range of 0 00931 Hz up to 20 MHz Both the period and time delay ranges are 50 ns to 107 4 seconds 5 V Timer generator TMR terminal Figure 11 USB 1208HS PWM timer channel Trigger input terminal The TRIG connection is an external digital trigger input The trigger mode is software selectable for Level sensitive or edge sensitive Rising or falling edge High or low level The default
14. USB 1208HS USB based High Speed Analog Input and Digital I O Module User s Guide s 9 MEASUREMENT 4 W t COMPUTING USB 1208HS USB based High Speed Analog Input and Digital I O Module User s Guide Va at a 4 W KK Va MEASUREMENT COMPUTING Document Revision 1 November 2008 Copyright 2008 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 mission To provide PC based data acquisition hardware and software that will save time and save money Simple installations minimize the time between setting up your system and actually making measurements We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system Limited Lifetime Warranty Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product to the original purchaser unless otherwise noted Any products found to be defective in material or workmanship will
15. ation type Input ranges Software selectable per channel Differential 20 V 10 V 5 V The voltage level on each individual AIN input is limited to 14 V SE 10 V 5 V 2 5 V 0 10 V Number of channels 4 differential 8 single ended software selectable Input configuration Multiplexed Channel gain queue 8 unique consecutive elements Software configurable range for each channel Absolute maximum input voltage CHx IN to GND 25 V maximum power on 12 V maximum power off Input impedance 35 MQ minimum Input bandwidth 3 db All input ranges 2 MHz typical Input leakage current 250 nA typical Input capacitance 32 pf typical Offset error drift 5 ppm C typical Gain error drift 25 ppm C typical Maximum working voltage 20 V 14V signal common mode 10 V 11 V 5 V 45 5 V Sampling rate 1 S s to 1 MS s software programmable Sample clock source Internal A D clock or AICKI 250 kHz input signal Burst mode Software selectable burst rate 1 us Throughput Software paced 33 to 4000 S s typical system dependent Scan to PC memory 1 MS s maximum Resolution 13 bits A D no missing codes Differential Mode 13 bits uncalibrated Single ended Mode 12 bits CMRR 60 Hz 74 dB typical Crosstalk Single ended mode All ranges 62 dB typical 250 kHz input signal
16. crosoft Windows operating systems The USB 1208HS is compatible with both USB 1 1 and USB 2 0 ports although the speed of the module maybe limited when using USB 1 1 ports With a multiplexed 13 bit A D converter for all analog input channels the USB 1208HS can sample up to eight single ended analog inputs upto four differential analog inputs A digital trigger lets you start analog input and or analog output scans The USB 1208HS also has 16 digital I O connections The port has 47 kQ resistors that you can configure for pull up pull down using a jumper inside the case The default configuration is pull down You can configure each digital bit for either input power on default or output The USB 1208HS also includes two 32 bit counters that can count TTL pulses and one 32 bit timer The USB 1208HS is powered by the 5 volt USB supply from your computer and requires no external power The USB 1208HS is shown below All I O connections are made to the screw terminals located along each side of the USB 1208HS USB 1208HS User s Guide Introducing the USB 1208HS USB 1208HS functions are illustrated in the block diagram shown here gt FPGA x8 13 bit 1MS amp channel A D E Co ii Figure 1 USB 1208HS functional block diagram Software features mec EEPROM Crystal 5 125V Reference 5 40V Supply Clock s 3 Microcontroller with Trigger USB
17. eee ee 16 hi eb lURIM E Eais 16 Power terminals ettet eet o ehe e d s v RU RUINIS 17 Analog ground terminals ninie ae ette Read ses 17 Common ground terminals nde nete RE de RU e ag ELSE e ede Eee eR eda 17 Chapter 4 SPCCITICATIONS mec ens 18 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 1208HS 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 Caution Shaded caution statements present information to help you avoid injuring yourself and others damaging your hardware or losing your data di 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 Fo
18. inal names CTRO CTRI Counter type Event counter Number of channels 2 Input type Schmitt trigger 33 Q series resistor 47 kQ pull down to ground Schmitt trigger hysteresis 0 4 V to 1 2 V Input high voltage 2 2 V minimum 5 5 V absolute maximum Input low voltage 1 5 V maximum 0 5 V absolute minimum 0 V recommended minimum Resolution 32 bits Counter read write rates software paced 33 to 8000 reads writes per second typical system dependent High pulse width 25 ns minimum Low pulse width 25 ns minimum Timer Table 9 Timer specifications Timer terminal name TMR Timer type PWM output with count period delay and pulse width registers Output value Default state is idle low with pulses high software selectable output invert Internal clock frequency 40 MHz Register widths 32 bits High pulse width 20 ns minimum Low pulse width 20 ns minimum Output high voltage 4 4 V minimum IOH 50 uA 3 76 V minimum IOH 24 mA Output low voltage 0 1 V maximum IOL 50 uA 0 44 V maximum IOL 24 mA Output current 24 mA maximum per terminal see Power section for additional information Memory Table 10 Memory specifications Data FIFO 4 kS analog input Non volatile memory 32 KB 16 KB firmware storage 16 KB calibration user data 21 USB 1208HS User s Guide
19. lf using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge If your USB 1208HS is damaged notify Measurement Computing Corporation immediately by phone fax or email 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 For international customers contact your local distributor Refer to the International Distributors section on our contact web page www mccdaq com contact USB 1208HS User s Guide Installing the USB 1208HS 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 install your USB 1208HS run Windows Update to update your operating system with the latest USB drivers Install the MCC DAQ software before you install your board The driver needed to run your board is installed with the MCC DAQ software Therefore you need to install the MCC DAQ software before you install your board Refer to the Quick Start Guide for instructions on installing the software Connecting the USB 1208HS to your system To connect the USB 1208HS to your system
20. nd Schmitt trigger 0 4 V to 1 2 V hysteresis Input high voltage 2 2 V minimum 5 5 V absolute maximum Input low voltage 1 5 V maximum 0 5 V absolute minimum 0 V recommended minimum External clock input output Table 7 External clock I O specifications Parameter Specification Terminal names AICKI AICKO Terminal type AICKI Input active on rising edge AICKO Output power on default is 0 V active on rising edge Terminal descriptions AICKI Receives sampling clock from external source AICKO Outputs internal sampling clock A D clock or pulse generated from AICKI when in external clock mode Input clock rate 1 MHz maximum Clock pulse width AICKI 400 ns minimum AICKO 400 ns minimum Input type Schmitt trigger 33 Q series resistor 47 kQ pull down to ground Schmitt trigger 0 4 V to 1 2 V hysteresis Input high voltage 2 2 V minimum 5 5 V absolute maximum Input low voltage 1 5 V maximum 0 5 V absolute minimum 0 V recommended minimum Output high voltage 4 4 V minimum IOH 50 uA 3 76 V minimum IOH 24 mA Output low voltage 0 1 V maximum IOL 50 pA 0 44 V maximum IOL 24 mA Output current 24 mA maximum per terminal see Power section for additional information 20 USB 1208HS User s Guide Specifications Counters Table 8 Counter specifications Counter term
21. nded 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 HM USB 1208HS doc 3 Table of Contents Preface About this User s Guide 5 1 i Gee D nte Gees E eaaa a a aa e aa Eea a aaa aei e eiaeiiai 5 What you will learn from this user s guide essssssssssesseseeeeeneer enne nennen enne 5 Conventions in this user s guide sse ener ener enne ennt ipio teen rennen rne 5 Where to find more information ccccesceesecsseeseeeseeeseeeseecensecesecseceaecsaeceaecaaecaeecaeeeseseneeeseseeessenseeneeeaeenaeenaes 5 Chapter 1 Introducing the USB 1208HS eeeeeeeeeeeeeeeeeee nennen nnn nn nennt in nnne nn innen nn inne tenni unen nnn nena 6 Softwatredeatules eo t S ROW RN titi E tita e 7 Chapter 2 Installing the USB 1208HS eerie iret reti iet cete ie mer Het etes ict oet ient lo Pear ot neta 8 Unpacking the USB 1208HS s e eue tice te ertet eite eek cieli aed Oe e A ae 8 Installing the software suse Reese eese e tete dee TSE ce re ees 9 Installing the hardware eee eee em ee e ee e ee Pt iiia 9 Connecting the USB 1208HS to your System cece siisi eaoaai
22. ng 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 XBee and XBee PRO are trademarks of MaxStream Inc 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 or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems which a are inte
23. nication status of the USB 1208HS It flashes when data is transferred and is off when the USB 1208HS is not communicating This LED uses up to 10 mA of current and cannot be disabled Status LED The Status LED lights up when the USB 1208HS is detected and installed on your computer Screw terminals The USB 1208HS module s screw terminals provide the following connections Eight analog input connections AINO to AIN7 16 digital I O connections D100 to DI015 10 analog ground connections AGND Six digital ground connections GND One external clock input AICKI and one external clock output AICKO for analog inputs One digital trigger input TRIG Two counter inputs CTRO CTR1 One timer output TMR Two 5 V power output connections 5 V AINO 1 29 NC AGND 2 8 a 30 NC AIN1 3S C31 AGND av ss Sls oc AGND GIE CE amp Na AGND AIN3 7g amp Na5 AlckI bib 3 8 36 AICKO 37 NC AGND 10 99 amp 38 NC ANS ufe 39 TRIG AGND 1206 amp ff GND AING 13 f4 CTRO AGND 14 42 CTR AIN7 15d S TMR AGND 16H GND empty 17 em sv cs S V GND 19 CS GND DIO0 20M amp DIO8 DIO1 2 AA DIO9 Do2 20 DIO10 pos 23M amp DIO11 Dos 24 amp DIO12 Dos 24M amp DIO13 Dose 26M amp DIO14 DIO7T _a7 DIO15 GND 28M amp GND Figure 3 USB 1208HS screw terminal signals 11 USB 1208HS User s Guide Functional Details Analog input terminals You can connect up
24. r example The nstaCal 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 1208HS MCC s Specifications USB 1208HS the PDF version of the Specifications chapter in this guide is available on our web site at www mccdaq com pdfs USB 1208HS pdf MCC s Quick Start Guide is available on our web site at www mccdaq com PDFmanuals DA Q Software Quick Start pdf MCC s Guide to Signal Connections is available on our web site at www mccdagq 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 available on our web site at www mccdaq 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 1208HS User s Guide this document is also available on our web site at www mcecdag com PDFmanuals USB 1208HS pdf Chapter 1 Introducing the USB 1208HS This user s guide contains all of the information you need to connect the USB 1208HS to your computer and to the signals you want to measure The USB 1208HS is a USB 2 0 high speed device supported under popular Mi
25. tional Details Figure 6 Digital connection DIO detecting the state of a switch a p GND 5V Figure 7 Schematic showing switch detection by digital channel DIOO Internal pull up pull down capability Each of the 16 DIO bits on the USB 1208HS has a 47 KQ pull up pull down resistor To configure these bits for either a 5 V pull up or a 0 V pull down option you must open the USB 1208HS case to access the three pin jumper labeled W34 The pull up pull down voltage is common to all of the internal 47 kQ resistors To open the case and set the W34 jumper do the following 1 Turnover the USB 1208HS and rest it on its top on a flat stable surface 2 Peel off the four rubber feet on the bottom of the module to access the screws 3 Remove the four screws shown in Figure 8 from the bottom of the module 14 USB 1208HS User s Guide Functional Details a Figure 8 Location of screws connecting bottom and top sections of case 4 Holding both the top and bottom sections of the module turn it back over rest it on the surface and carefully remove the top section of the case 5 Set the jumper to either pull up or pull down see Figure 9 and Figure 10 09 0660096006005000 090600020000 Figure 9 Location of W34 jumper default pull down setting shown Pull down jumper Pull up jumper configuration configuration default Figure 10 W34 jumper pull down and pull up configurations 6
26. to eight analog input connections to the screw terminals labeled AINO through AIN7 Input configuration Analog signals are referenced to analog ground AGND Single ended mode requires two wires The wire carrying the signal to be measured connects to AINx The second wire connects to AGND Differential mode requires two wires plus a ground reference The wire carrying the positive portion of the differential signal to be measured connects to AINx The wire carrying the negative portion of the differential signal to be measured connects to AIN x 1 The analog ground reference wire connects to AGND The terminal configurations for single ended and differential modes are shown in the table below Channel 8 single ended channels configuration 0 4 differential channels configuration Vint Viz Vint Viz 0 AINO AGND AINO AINI 1 AINI AGND AIN2 AIN3 2 AIN2 AGND AIN4 AINS 3 AIN3 AGND AIN6 AIN7 4 AIN4 AGND 5 AIN5 AGND 6 AIN6 AGND 7 AIN7 AGND In single ended mode the input voltage ranges are 10 V 5 V 2 5 V 0 to 10 V In differential mode the input voltage ranges are 20 V 10 V and 5 V The voltage level on each AINx input is limited to 14 V The following image depicts a voltage source connected to a USB 1208HS configured for single ended mode AGND Figure
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