USB-1608FS-Plus User's Guide
Contents
1. Screw terminal I O connector Screw terminal I O connector PC 5V Event Counter 1 channel Figure 1 Functional block diagram Chapter 2 Installing a USB 1608FS Plus What comes with your shipment Verify that the following hardware components are included in the shipment Hardware USB 1608FS Plus USB cable Software MCC DAQ CD Documentation MCC DAQ Quick Start Guide The Quick Start Guide booklet provides an overview of the MCC DAQ software you received with the device and includes information about installing the software Please read this booklet completely before installing any software or hardware DAQFlex Insert The DAQFlex insert ships with all hardware that supports DAQFlex software The operating systems supported by the device are listed on the insert and includes the internet location where you can download DAQFlex software and the locations where you can learn more about DAQFlex software and MCC DAQ software Unpacking As with any electronic device take care while handling to avoid damage from static electricity Before removing the USB 1608FS Plus from its packaging ground yourself using a wrist strap or touch either the computer chassis or other grounded object to eliminate any stored static charge If the device is damaged notify Measurement Computing Corporation immediately by phone fax or email Knowledgebase kb mccdaq com Phone 508 946 5100 and follow the in2. Parameter Condition Specification Pin name SYNC Pin type Bidirectional Direction software selectable Input Receives A D pacer clock from external source Output Outputs internal A D pacer clock Input clock rate 100 kHz max Clock pulse width Input 1 us min Output 4 us min Input clock mode Edge sensitive rising Input type Schmitt trigger 47 kQ pull down to ground Schmitt trigger hysteresis 1 01 V typ 0 6 V min 1 5 V max Input high voltage threshold 2 43 V typ 1 9 V min 3 1V max Input high voltage limit 5 5 V absolute max Input low voltage threshold 1 42 V typ 1 0 V min 2 0 V max Input low voltage limit 0 5 V absolute min 0 V recommended min Output high voltage 4 4 V min OH 50 pA 3 80 V min OH 8 mA Output low voltage 0 1 V max OL 50 pA 0 44 V max IOL 8 mA 19 USB 1608FS Plus User s Guide Specifications Counter section Table 8 Counter specifications Parameter Specification Pin name CTR Counter type Event counter Number of channels 1 Input type Schmitt trigger 47 kQ pull down to ground Input source CTR screw terminal Resolution 32 bits Schmitt trigger hysteresis 1 01 V typ 0 6 V min 1 5 V max Input high voltage threshold 2 43 V typ 1 9 V min 3 1V max Input high voltage limit 5 5 V absolute max Input low voltage threshold 1 42 V typ 1 0 V min 2 0 V max Input low v
3. Up to eight elements one gain element per unique ordered channel Resolution 16 bits No missing codes 16 bits Crosstalk Signal DC to 25 kHz 80 dB Trigger source Software selectable External digital TRIG_IN Note 1 Maximum throughput when scanning in hardware paced mode is machine dependent Accuracy Analog input DC voltage measurement accuracy Table 2 Calibrated absolute accuracy Range Accuracy mV 10 V 5 66 5 V 2 98 2 V 1 31 1 V 0 68 17 USB 1608FS Plus User s Guide Table 3 Accuracy components All values are Range Gain error Gain error at FS Offset mV of Reading 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 1 V 0 04 0 40 0 28 Noise performance Table 4 Noise performance Range Typical counts LSBrms 10 V 10 1 52 5 V 10 1 52 2 V 11 1 67 1 V 14 2 12 Table 4 summarizes the noise performance for the USB 1608FS Plus 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 100 kS s Digital input output Table 5 Digital I O specifications Parameter Specification Digital type SV TTL Number of I O 8 DIOO through DIO7 Configuration Independently configured for input or output Pull up pull down All pins
4. the internal A D pacer clock signal is sent to the screw terminal You can output the clock to the SYNC pin of another device that is configured for A D pacer input 15 USB 1608F S Plus User s Guide Functional Details Mechanical drawings 2 80 00009000000000000000 1 05 O0OHOOOODOOOOQOOOOD 3 20 Figure 11 USB 1608FS Plus circuit board top and enclosure dimensions 16 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 General analog input specifications Parameter Condition 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 relative to GND 15 V max Input impedance 100 MQ min Input ranges Software selectable per channel 10 V 5 V 2 V 1 V Sampling rate Hardware paced 0 01 S s to 100 kS s software selectable Throughput Software paced 500 S s all channels Hardware paced Note 1 400 kS s of channels max 100 kS s max for any channel Burst scan lt 32 768 total samples 800 kS s of channels max uses onboard FIFO 100 kS s max for any channel Gain queue Software configurable
5. 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 RSVD 37 TRIG_IN 18 AGND 38 CTR 19 AGND 39 PC 5V 20 AGND 40 GND 22 CE 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 Plus to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EC EMC Directive 2004 108 EC General Requirements EN 61326 1 2006 IEC 61326 1 2005 Emissions EN 55011 2007 CISPR 11 2003 Radiated emissions Group 1 Class A EN 55011 2007 CISPR 11 2003 Conducted emissions Group 1 Class A Immunity EN 61326 1 2006 Table 3 IEC 61000 4 2 2001 Electrostatic Discharge immunity TEC 61000 4 3 2002 Radiated Electromagnetic Field immunity To maintain compliance to the standards of this declaration the following conditions must be met The host computer peripheral equipment power sources and expansion hardware must be CE compliant All I O cables must be shielded with the shields connected to ground J O cables must be less than 3 meters 9 75 feet in length The host computer must be properly grounded The host compute
6. accuracy plots in Figure 9 are drawn for clarity and are not drawn to scale Input Voltage Gain error 0 04 or 4 mV Gain error 0 04 or 4 mV y ds Ta Output Code a 65535 10V Figure 9 ADC Transfer function with gain error For example a USB 1608FS Plus 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 10 we have a plot of the error band at full scale 10 V This plot is a graphical version of the typical accuracy specification of the product The accuracy plots in Figure 10 are drawn for clarity and are not drawn to scale Input Voltage Ideal 1 66 mV 4 mV Ideal Ideal 1 66 mV 4 mV Output Code 65535 Ideal 1 66 mV 4 mv gt Ideal gt 10V Ideal 1 66 mV 4 mV gt Figure 10 Error band plot Synchronized operations You can connect the SYNC pin of multiple devices together in a master slave configuration and acquire data from the analog inputs of all devices using one clock When the SYNC pin is configured as an output
7. 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 3 Output current is the total amount of current that can be sourced from the PC 5V SYNC and digital outputs General Table 12 General specifications Parameter Specification Device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 Environmental Table 13 Environmental specifications Parameter Specification Operating temperature range 0 C to 70 C Storage temperature range 40 C to 70 C Humidity 0 to 90 non condensing Mechanical Table 14 Mechanical specifications Parameter Specification Dimensions L x W x H 79 x 82 x 27 mm 3 10 x 3 20 x 1 05 in USB cable length 3 m 9 84 ft max User connection length 3 m 9 84 ft max 21 USB 1608FS Plus User s Guide Specifications Screw terminal connector and pinout Table 15 Connector specifications Parameter Specification Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Table 16 Connector pinout 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 CH4 IN 29 DIO4 10 AGND 30
8. diari cacon dnd rd EEE EEEE e Co ETE eti EE OERE EO NOES EE A 6 Chapter 2 Installing a USB 1608FS Plus What COMES with yo r Shipment aooiee ne ee E E E ENE ENEE ENE EEE E E E 7 Hard Ware critical OR ET EE A TEA A O A OR Stee AE AROR EORR pes 7 Software Doc mentatioi a A A ir s 7 Unpacking elisa ici lic 7 Installing the SoftWare sarae sienseeshs idan os O save dla role Senet ERA eee ias 7 DA ORV CK 590 tdt daa dat 7 Universal Library and InstaCal ieser eaen aeee a aee aeae ane eee eri nee oe naa ea aerae urs 8 Installing the hard Water 8 Calibrating the hard Water 8 Chapter 3 Functional Details Analog input MOdeSw s 268 eee A Aveo A 9 Software paced Hardware paced Burst SCAM tn ii A A E A AAA A A RA External components USB connector STE WALES iii ii T Signal CONMECHONS tii 11 PMA OG PUC aaa aii Dinal TO A ao Counter input SYNC DO Trigger input Reserved Ground Power Out pt A A AE TACA E TO an Synchronized AAPP RN 15 Mechanical dra WES custodiado suytescbesseesce st aee ee aE S E Oae pee a ae S E Ne he EPSPS Jevssbevn cette Er EESE 16 Chapter 4 Specifications eiea aaa ici 17 Anal input iia a T E 17 ANCCULACY ur a Analog input DC voltage measurement accuracy Noise performance Digital input output ie cnica IRA E rE shoes eri Lia II SE S rT it A O E E E USB 1608FS Plus User s Guide External clock input outputs sirsenis eiser
9. internal jumper labeled DIO You must remove the device housing to access the jumper on the circuit board To set the jumper for pull up or pull down complete the following steps 1 Unplug the device from the computer 2 Turn the device over and rest the top of the housing on a flat stable surface Caution The discharge of static electricity can damage some electronic components Before removing the USB 1608FS Plus from its housing ground yourself using a wrist strap or touch the computer chassis or other grounded object to eliminate any stored static charge Remove the three screws from the bottom of the device using a 1 Philips head screwdriver 4 Hold both the top and bottom sections together turn the device over and rest it on the surface then carefully remove the top section of the case to expose the circuit board Figure 5 shows the location of the DIO jumper on the circuit board Figure 5 loo jumper location 5 Configure the jumper for pull up or pull down as shown in Figure 6 ee e ron 9 DIO Pull up Pull down default Figure 6 Pull up down jumper configuration 12 USB 1608F S Plus User s Guide Functional Details 6 Replace the top section of the housing and fasten it to the bottom section with the three screws 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 Conne
10. NW DIO channel 1 DIO1 Digital ground GND DIO channel 0 DIOO CH1IN Al channel 1 AGND Analog ground CHOIN Al channel 0 ovo0o0o0c0oa 0a emnw w o voo DIO channel 4 DIO4 9 CH4IN Alchannel 4 Digital ground GND 8 AGND Analog ground DIO channel 3 DIO3 7 CH3IN Alchannel 3 Digital ground GND 6 AGND Analog ground DIO channel 2 DIO2 5 CH2IN Alchannel2 Digital ground GND 4 AGND Analog ground 3 2 1 N Figure 3 Screw terminal pinout Signal connections Analog input You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 CHO IN through CH7 IN 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 All analog input channels are configured for single ended input mode All analog input signals are referenced to ground AGND Connect the wire carrying the signal to be measured to CH IN Connect the second wire to AGND The input voltage ranges are 10 V 5 V 2 0 V 1 0 V 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 Channel Gain queue The channel gain queue feature allows you to configure a different gain setting for each channel The gain settings are store
11. USB 1608FS Plus Analog Input and Digital I O User s Guide Document Revision 3 Va QU Fa MEASUREMENT October 2013 r Copyright 2013 4 N Vap COMPUTING Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction 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 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 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 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 curr
12. ach six channels at 66 7 kS s each and so on up to eight channels at 50 kS s each You can start a hardware paced scan with a software command or an external hardware trigger event Burst scan In burst scan mode BURSTIO you can acquire data from the USB 1608FS Plus using the full capacity of the 32 k sample FIFO The acquired data is read from the FIFO and transferred to a user buffer in the computer You can initiate a single acquisition sequence of one to eight channels with either a software command or an external hardware trigger event Burst scans are limited to the depth of the on board memory as the data is acquired at a rate faster than it can be transferred to the computer The maximum sampling rate is an aggregate rate The total sample rate using burst scan mode is 100 kS s per channel for any or all channels A data overrun may occur if you exceed the FIFO capacity and sample gt 32 768 samples External components The USB 1608FS Plus has the following external components as shown in Figure 2 Screw terminals LED USB connector USB 1608FS Plus User s Guide Functional Details 1 Screw terminal pins 21to40 3 Screw terminal pins 1 to 20 2 LED 4 USB connector Figure 2 USB 1608FS Plus components USB connector Receives the supplied USB cable When connected to a computer or USB hub the cable provides 5 V power and communication No external power supply is required LED The LED indicates the commu
13. ctions available on our web site at www mccdaq com signals signals pdf Counter input The CTR terminal is a 32 bit event counter that can accept frequency inputs up to 1 MHz The internal counter increments when the TTL levels transition from low to high SYNC I O The SYNC terminal is a bidirectional I O signal that can be configured as an input default or an output Configure as an external clock input to pace the A D conversions from an external source The SYNC terminal supports TTL level input signals of up to 100 kHz Configure as an output that may be used to pace conversions on a second device and acquire data from 16 channels Refer to page 15 for more information about synchronized operations Trigger input The TRIG_IN terminal is an external digital trigger input The trigger mode is software selectable for edge or level sensitive Edge sensitive mode is selectable for rising or falling Level sensitive mode is selectable for high or low Reserved The RSVD terminal is reserved for future use Ground The analog ground AGND terminals provide a common ground for all analog channels The digital ground GND terminals provide a common ground for the digital trigger counter and sync channels and the power terminal Power output The PC 5V output terminal can output up to 200 mA maximum You can use this terminal to supply power to external devices or circuitry Caution The PC 5V terminal is an outpu
14. d in a channel gain queue list that is written to local memory on the device The channel gain queue list can contain up to eight unique elements The channel list must be in increasing order An example of a five element list is shown in the table below Sample channel gain queue list Element Channel Range 0 CHO BIP1V 1 CH2 BIP2V 2 CH4 BIP10V 3 CH6 BIPIV 4 CH7 BIPS5V 11 USB 1608F S Plus User s Guide Functional Details Carefully match the gain to the expected voltage range on the associated channel or an over range condition may occur Although this condition does not damage the device it does produce a useless full scale reading and can introduce a long recovery time due to saturation of the input channel Digital 1 0 You can connect up to eight digital I O lines to DIOO through DIO7 Each digital channel is individually configurable for input or output During initial power on or reset the digital pins are set for input The digital I O terminals can detect the state of any TTL level input Refer to the schematic shown in Figure 4 DIOO lt vy x L 5V Figure 4 Schematic showing switch detection by digital channel DIOO If you set the switch to the 5 V input DIOO reads TRUE 1 When set to GND DIOO reads FALSE 0 Pull up down configuration All digital I O lines are pulled up to USB 5V HI with a 47 kQ resistor default You can change the pull up down configuration using the
15. ent 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 Measurement Computing Corporation InstaCal Universal Library and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Refer to the Copyrights amp Trademarks section on mecdaq com legal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2013 Measure
16. ment 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 that 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 HM USB 1608FS Plus Table of Contents Preface About this User s Guide oi need raices What you will learn from this user s guide Conventions in this user s guide ooooonncnoncnonoconoconoconocnonononnnonn nono nono ineo ers Eoi neon o renTo norka a cre ie t 5 Where to find more MforMatONn vececocicinonnrnn dico dentario dana EE eE UdeG e IR E RUIN EEEE dida sedan open 5 Chapter 1 Introducing the USB 1608FS PlUS ooonncccccnninnsnnnccccarercr cr 6 Functional block
17. ng Corporation when calibration is required The recommended calibration interval is one year The USB 1608FS Plus does not support field calibration Chapter 3 Functional Details Analog input modes The USB 1608FS Plus can acquire analog input data in three modes software paced hardware paced and burst scan Software paced 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 typical throughput sample rate in software paced mode is 500 S s system dependent Hardware paced You can acquire data from up to eight channels simultaneously in hardware paced mode The analog data is continuously acquired converted to digital values and written to an on board FIFO buffer on the device until you stop the scan The FIFO buffer is serviced in blocks as the data is transferred from the device FIFO buffer to the memory buffer on your computer Data is transferred in blocks from the device to the memory buffer on your computer The maximum sampling rate is an aggregate rate The total sample rate using hardware paced mode is 400 kS s divided by the number of channels with a maximum rate of 100 kS s for any channel You can acquire data from one to four channels at 100 kS s e
18. nication status it cannot be disabled LED behavior LED state Indication On steady green The device is connected to a computer or external USB hub Blinks once A USB command is received Blinks continuously An analog input scan is in progress Screw terminals The screw terminals provide the following connections Eight analog inputs CHO IN to CH7 IN Eight digital I O lines DIOO to DIO7 One external event counter input CTR One SYNC I O terminal for external clocking and multi unit synchronization SYNC One external trigger input TRIG_IN One power output PC 5 V 11 analog ground AGND and eight digital ground GND connections Use 16 AWG to 30 AWG wire when making connections to the screw terminals Pinout locations are shown in Figure 3 10 USB 1608FS Plus User s Guide Functional Details Digital ground GND 20 AGND Analog ground Power output PC 5V 19 AGND Analog ground Counter input CTR 18 AGND Analog ground Trigger input TRIG_IN 17 RSVD Reserved Sync VO SYNC 16 AGND Analog ground DIO channel 7 DIO7 15 CH7IN Alchannel7 Digital ground GND 14 AGND Analog ground 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 2 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 CH6IN Al channel 6 AGND Analog ground CH5IN Al channel 5 AGND Analog ground DIO channel 6 DIO6 Digital ground GND DIO channel 5 DIOS Digital ground GND a ok a e o
19. oklet for instructions about installing Universal Library and InstaCal software Installing the hardware Install the software before you install your device The driver needed to run the USB 1608FS Plus device is installed when you install the software Therefore you need to install the software package you plan to use before you install the hardware For operation on a Windows operating system we recommend that you run Windows Update to update your operating system with the latest USB drivers To connect the USB 1608FS Plus to your system connect the USB cable to an available USB port on the computer or to an external USB hub connected to the computer Connect the other end of the USB cable to the USB connector on the device No external power is required When connected for the first time a Found New Hardware dialog opens when the operating system detects the device When the dialog closes the installation is complete The LED on the USB 1608FS Plus turns on after the device is successfully installed If the LED turns off If communication is lost between the device and the computer the device LED turns off To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn on Calibrating the hardware The Measurement Computing Manufacturing Test department performs the initial factory calibration Return the device to Measurement Computi
20. oltage limit 0 5 V absolute min 0 V recommended min Input frequency 1 MHz max High pulse width 500 ns min Low pulse width 500 ns min Memory Table 9 Memory specifications Parameter Specification Data FIFO 32 768 samples 65 536 bytes EEPROM 2 048 bytes 768 bytes calibration 256 bytes user 1 024 bytes DAQFlex Microcontroller Table 10 Microcontroller specifications Parameter Specification Type High performance 32 bit RISC microcontroller 20 USB 1608FS Plus User s Guide Specifications Power Table 11 Power specifications Parameter Condition Specification Supply current USB enumeration lt 100 mA Supply current Including DIO and SYNC output loading lt 500 mA 5V power available Note 2 Connected to externally powered root port hub ora 4 5 V min 5 25 V max self powered hub Output current Note 3 200 mA max Note 2 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 USB host Controller The USB port s on your PC are root port hubs All externally powered root port hubs such as a desktop PC 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
21. orporation by phone fax or email with specific questions Knowledgebase kb mccdag com 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 Chapter 1 Introducing the USB 1608FS Plus The USB 1608FS Plus is an analog input and digital I O data acquisition device providing the following features Eight 16 bit single ended SE analog input channels Each input channel has a dedicated A D converter for simultaneous sampling Software selectable analog input ranges of 10 V 5 V 2 V and 1 V Eight individually configurable digital I O channels One 32 bit event counter One external digital trigger input Bidirectional external clock for synchronous operation with more than one device Screw terminals for field wiring connections The device is powered by the 5V USB supply from the computer requiring no external power The USB 1608FS Plus is compatible with both USB 1 1 and USB 2 0 ports The speed of the device may be limited when using a USB 1 1 port due to the difference in transfer rates on the USB 1 1 versions of the protocol low speed and full speed Functional block diagram USB 1608FS Plus functions are illustrated in the block diagram shown here USB PGA 1 2 5 10 Full speed USB 2 0 Compliant Interface by a i Bo ES A eo o y USB Microcontroller TRIG_IN
22. pulled up to 5V via 47 K resistors default configuration May be changed to pull down using an internal jumper Input high voltage 2 0 V min threshold Input high voltage limit 5 5 V absolute max Input low voltage threshold 0 8 V max Input low voltage limit 0 5 V absolute min 0 V recommended min Output high voltage 4 4 V min IOH 50 pA 3 76 V min IOH 24 mA Output low voltage 0 1 V max OL 50 pA 0 44 V max IOL 24 mA Power on and reset state Input 18 USB 1608FS Plus User s Guide Specifications External trigger Table 6 External trigger specifications Parameter Condition Specification Trigger source External digital TRIG_IN Trigger mode Software selectable Edge or level sensitive user configurable for CMOS compatible rising or falling edge high or low level Trigger latency 2 us 1 pacer clock cycle max Trigger pulse width lus min Input type Schmitt trigger 47 kQ pull down to ground Schmitt trigger hysteresis 1 01 V typ 0 6 V min 1 5 V max Input high voltage threshold 2 43 V typ 1 9 V min 3 1V max Input high voltage limit 5 5 V absolute max Input low voltage threshold 1 42 V typ 1 0 V min 2 0 V max Input low voltage limit 0 5 V absolute min 0 V recommended min External clock input output Table 7 External clock I O specifications
23. r must be USB 2 0 compliant Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN 61326 1 2006 or IEC 61326 1 2005 Note Data acquisition equipment may exhibit noise or increased offsets when exposed to high RF fields gt 1V m or transients Declaration of Conformity based on tests conducted by Chomerics Test Services Woburn MA 01801 USA in September 2011 Test records are outlined in Chomerics Test Report EMI5948 11 Further testing was conducted by Chomerics Test Services Woburn MA 01801 USA in December 2011 Test records are outlined in Chomerics Test Report EMI5996 11 We hereby declare that the equipment specified conforms to the above Directives and Standards Lg 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
24. s eee Eer i eria REEE EEEE T EPEE rE SEE SEEE EE EEEN EEIE 19 Co nter s ch Meir didas id idas didnt ARER AREARE RT 20 MEMO esti A NS 20 Microcontro lr di AA a aee o E a e ii 20 POWER NON 21 Generale e E RON 21 Environmental nenesou eii 21 Mechanical nonnina cs it EE e E A Ra E E E ee a eee 21 Screw terminal connector and pinout oooooconoconononnonnncnnonon nono nono neon none ne rn enn Ron Ro ne rn Rene Ren eE OPERETES Ees Rene T o REESE Sreo ie 22 Declaration of CONTO MIR Y acicate a loaded aran biien 23 Preface About this User s Guide What you will learn from this user s guide This user s guide describes the Measurement Computing USB 1608FS Plus data acquisition device and lists device specifications Conventions in this user s guide For more information 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 bold text Bold text is used for the names of objects on a screen such as buttons text boxes and check boxes italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase Where to find more information Additional information about the USB 1608FS Plus is available on our website at www mccdag com You can also contact Measurement Computing C
25. small and is not significant as an error source with respect to offset and gain Figure 7 shows an ideal error free transfer function The typical calibrated accuracy of a USB 1608FS Plus is range dependent We use a 10 V range as an example of what you can expect when performing a measurement in this range Input Voltage Output Code N 32768 65535 10V Figure 7 Ideal ADC transfer function The offset error is measured at mid scale Ideally a zero volt input should produce an output code of 32 768 Any deviation from this is an offset error Figure 8 shows the transfer function with an offset error The typical offset error specification for a USB 1608FS Plus 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 8 are drawn for clarity and are not drawn to scale Input Voltage Ideal Offset 1 66 mV x A JAN 32768 1 66 mV Output Code 4 0 i Actuals 65535 10V Figure 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 9 shows the USB 1608FS Plustransfer function with gain error Gain error is easily converted to voltage by multiplying the full scale input 10 V by the error 14 USB 1608FS Plus User s Guide Functional Details The
26. structions 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 web site at www mccdag com International Installing the software Note Before installing the USB 1608FS Plus first install the software you plan to use with the device The USB 1608FS Plus is supported by Universal Library software and DAQFlex software You can install both software packages on your computer However you cannot run both software packages simultaneously with one USB 1608FS Plus device DAQFlex Install DAQFlex software when you want to develop data acquisition applications that can be deployed across multiple operating systems and custom embedded systems USB 1608FS Plus User s Guide Installing a USB 1608FS Plus DAQHFIex software for each supported operating system is available from the DAQFlex download page at www mccdaq com DAOFIexDL Refer to the DAQFlex Software User s Guide at www mecdag com pdfs manuals DAQFlex 20Software pdf for instructions about installing DAQFlex software Universal Library and InstaCal Install Universal Library and InstaCal when you want to develop data acquisition applications using Windows programming languages Universal Library and InstaCal software are included on the CD that ships with the device Refer to the Quick Start Guide bo
27. t Do not connect it to an external power supply or you may damage the device and possibly the computer The maximum output current that can be drawn by the USB 1608FS Plus 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 If the current requirement of the device exceeds the current available from the computer connect to a self powered hub or power the computer with an external power adapter When running applications with the device each DIO bit can source up to 24 mA The total amount of current that can be sourced from the PC 5V SYNC and digital outputs is 200 mA max Accuracy The overall accuracy of any instrument is limited by the error components within the system Resolution is often used incorrectly to quantify the performance of a measurement product While 16 bits or 1 part in 65 536 does indicate what can be resolved it provides little insight into the quality or accuracy of an absolute measurement Accuracy specifications describe the actual measurement achievable with a USB 1608FS Plus Accuracy specifications are listed on page 17 13 USB 1608FS Plus User s Guide Functional Details There are three types of errors which affect the accuracy of a measurement system offset gain nonlinearity The primary error sources in a USB 1608FS Plus are offset and gain Nonlinearity is
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