USB-DIO24H/37 User`s Guide
Contents
1. 125port writes or single bit writes per second typical Counter timer read write rates software paced Counter read 62 port reads per second typical Counter clear 125 port writes per second typical Power Table 4 Power specifications Parameter Conditions Specification Supply current Note 5 No Load 100mA typ 135 mA max Input power requirements Note 6 4 75 V min 5 25 V max USB 5 V power available Measured at USB 5 V screw 4 4 V min 5 25 V max terminals pins 10 14 and 30 USB 5 V power Connected to 350 mA total output source output current Note 7 Self powered hub current Externally powered root port hub USB 5 V over current protection Resettable fuse Hold current 350 mA typical Trip current 700 mA typical Trip recovery time 100 mS max On resistance 1 3 Ohms max Note 5 This is the total no load current requirement for the USB DIO24H 37 Note 6 Bus powered hubs are allowed to provide downstream USB power as low as 4 4 V Although your USB DIO24H 37 will typically function at this 4 4 V minimum guaranteed performance requires a minimum power supply voltage of 4 75 V All self powered and root port hubs will meet this 4 75 V minimum Note 7 Refer to the available source sink current level listed in the Digital input output section 4 2 USB DIO24H 37 User s Guide Specifications General Table 5 General specification2. 3 Output sink Current IS a A son eos sn At i 3 3 Chapter 4 SPOCHICALIONS ais a assa la a a 4 1 Digital A SR A nade actus aa ee EM es 4 1 I 4 2 Data transterrates ista ati leete ta tono Poo an to E A tl feat 4 2 O E O O ONO 4 2 Generals eel a as e o elle eine AN eta oo Win Sot 4 3 Environmental estao rs de col er e cl del ser o do el 4 3 Mechanical e da eet een dd o de ed a dE 4 3 Main connector and pin Out vanidad ida 4 3 iv 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 DIO24H 37 digital I O board 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 lt tt gt 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
3. Cables ti 4 20 20 19 37 O O E Figure 2 3 C37FFS x cable The red stripe identifies pin 1 Al 20 37 Figure 2 4 C37FF x cable Field wiring signal termination and conditioning Y ou can connect the USB DIO24H 37 to the following accessory boards using the C37FF x or C37FFS x cable SCB 37 37 conductor shielded signal connection screw terminal box Details on this product are available on our web site at www mccdaq com cbicatalog cbiproduct asp dept_id 196 amp pf_id 1166 CIO MINI37 37 pin screw terminal board Details on this product are available on our web site at www mecdag com cbicatalog cbiproduct asp dept_id l02 amp pf_id 1543 CIO MINI37 VERT 37 pin screw terminal board with vertical 37 pin male D connector Details on this product are available on our web site at www mcecdag com cbicatalog cbiproduct asp dept_id l02 amp pf_id 256 CIO ERBO08 Eight Form C 6A relays Details on this product are available on our web site at www mccdaq com cbicatalog cbiproduct asp dept id 123 zpf id 240 CIO SERBO08 8 Form C relays 10 Amp relay accessory board with socketed and field replaceable relays Details on this product are available on our web site at www mecdag com cbicatalog cbiproduct asp dept_id 123 amp pf_id 680 CIO ERB24 24 Form C 6A relays Details on this product are available on our web site at www mccdaq com cbicatalog cbiprodu
4. Input low voltage 0 8 V max 0 5 V absolute min Output high voltage IOH 15 mA 2 4 V min Output low voltage IOL 64 mA 0 55 V max Source current Note 1 Maximum 15 mA per output Self powered hub Externally powered root port hub Source current Note 2 Not supported Bus powered hub Battery powered root port hub Sink current Note 3 Current sink max 365 mA number of outputs 64 mA max sink current for any single output Power up reset state Input mode high impedance Note 1 Self powered hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB device to draw up to 500 mA Root port hubs reside in the PC s USB Host Controller The USB port s on your PC are root port hubs All externally powered root port hubs 1 e desktop PC s provide up to 500 mA of current for a USB device In this configuration all 24 digital outputs of the USB DIO24H 37 can source their per pin maximum of 15 mA This provides a total requirement of 15 mA 24 360 mA Combining this with the USB DIO24H 37 operating current of 135 mA a fully loaded current draw of 495 mA is realized Note 2 Bus powered hub refers to a USB hub that derives power directly from the USB 5 V and does not have its own power supply These hubs allow a connected USB device to draw up to 100 mA Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A la
5. a USB hub You can connect your system to various devices using a standard four wire cable The USB connector replaces the serial and parallel port connectors with one standardized plug and port combination Data can flow two ways between a computer and peripheral over USB connections Make sure that you have the latest Windows Updates installed for your USB driver particularly XP Hotfix KB822603 Chapter 2 Installing the USB DIO24H 37 What comes with your USB DIO24H 37 shipment The following items are shipped with the USB DIO24H 37 Hardware USB DIO24H 37 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 mecdag com PDFmanuals DAQ Software Quick Start pdf This booklet supplies a brief description of the software you received with your USB DIO24H 37 and information regarding installation of that software Please read this booklet completely before installing any software or hardware Optional components If you ordered any of the following products with your board they should be included with your shipment Cables C37FFS x 2 1 USB DIO24H 37 User s Guide Installing the USB DIO24H 37 Signal termination and conditioning accessories MCC provides signal termination and conditioning boards that you can use with the USB DIO24H 37 Refer to the Field wiring signal terminat
6. board You can use this board in a variety of digital applications to control logic devices such as switches gauges relays pumps and sensors The USB DIO24H 37 is a USB 2 0 low speed module supported under popular Microsoft Windows operating systems It is designed for USB 1 1 ports and was tested for full compatibility with both USB 1 1 and USB 2 0 ports The USB DIO24H 37 is a high drive 24 line digital I O module that includes one 32 bit external event counter Power is supplied by the 5 volt USB supply from your computer No external power is required Digital I O lines are accessed through a 37 pin connector Each digital port can be configured for either input or output Digital channels are pulled up to 5V with 47k resistors The control register that sets the direction of the I O ports is an emulation of the 82C55 in mode 0 only The 74FCT244 outputs are high drive TTL capable of sourcing 15 mA and sinking 64 mA The USB DIO24H 37 board is completely plug and play with no jumpers or switches to set All board addresses are set by your system s plug and play software USB DIO24H 37 block diagram USB DIO24H 37 functions are illustrated in the block diagram shown here High Drive 82C55 Emulation PORT A 7 0 500 mA _ USB USB 2 0 PORT CH 3 0 PORT CH Microcontroller pala PORT CL 3 0 PORT EL eS PORT B 7 0 32 bit Event Counter 1 channel 37 Pin I O Connector Figure 1
7. the LED is It indicates Steady green The USB DIO24H 37 is connected to a computer or external USB hub Blinks continuously Data is being transferred Blinks three times Initial communication is established between the USB DIO24H 37 and the computer Pull up resistors Each digital port has an internal 47k pull up resistor network All digital pins are pulled up to 5 V high logic level on power up and reset Power consumption The maximum total output current that can be drawn from all USB DIO24H 37 connections power and digital outputs is 500 mA This maximum applies to most personal computers and self powered USB hubs Bus powered hubs and notebook computers may limit the maximum available output current to 100 mA To overcome this limitation an external self powered hub can be used to supply the proper current level required for full output capability Once you start running applications with the USB DIO24H 37 each DIO bit can draw up to 15 mA The maximum amount of 5 V current available for external use over and above that required by the USB DIO24H 37 is the difference between the total current requirement of the USB DIO24H 37 based on the application and the allowed current draw of the computer platform 500 mA for desktop PCs and self powered hubs 3 2 USB DIO24H 37 User s Guide Functional Details The following power limits depend on whether you are sourcing current out of the USB DIO24H 37 or you
8. 1 USB DIO24H 37 functional block diagram USB DIO24H 37 User s Guide Introducing the USB DIO24H 37 Software features For information on the features of JnstaCal and the other software included with your USB DIO24H 37 refer to the Quick Start Guide that shipped with your device The Quick Start Guide is also available in PDF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf Check www mccdaq com download htm for the latest software version or versions of the software supported under less commonly used operating systems Connecting a USB DIO24H 37 to your computer is easy Installing a data acquisition device has never been easier The USB DIO24H 37 relies upon the Microsoft Human Interface Device HID class drivers The HID class drivers ship with every copy of Windows that is designed to work with USB ports We use the Microsoft HID because it is a standard and its performance delivers full control and maximizes data transfer rates for your USB DIO24H 37 No third party device driver is required The USB DIO24H 37 is plug and play There are no jumpers to position DIP switches to set or interrupts to configure You can connect the USB DIO24H 37 before or after you install the software and without powering down your computer first When you connect an HID to your system your computer automatically detects it and configures the necessary software You can connect and power multiple HID peripherals to your system using
9. 7 Port B Bit 3 26 Port C Bit 3 8 Port B Bit 2 27 Port C Bit 2 9 Port B Bit 1 28 Port C Bit 1 10 Port B Bit 0 29 Port C Bit 0 11 GND 30 Port A Bit 7 12 NC 31 Port A Bit 6 13 GND 32 Port A Bit 5 14 NC 33 Port A Bit 4 15 GND 34 Port A Bit 3 16 NC 35 Port A Bit 2 17 GND 36 Port A Bit 1 18 5 37 Port A Bit 0 19 GND 4 4 EC 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 DI024H 37 to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EU EMC Directive 89 336 EEC Electromagnetic Compatibility EN 61326 1997 Amendment 1 1998 Emissions Group 1 Class A EN 55011 1990 CISPR 11 Radiated and Conducted emissions Immunity EN61326 Annex A JEC 61000 4 2 1995 Electrostatic Discharge immunity Criteria C JEC 61000 4 3 1995 Radiated Electromagnetic Field immunity Criteria A JEC 61000 4 8 1994 Power Frequency Magnetic Field immunity Criteria A Declaration of Conformity based on tests conducted by Chomerics Test Services Woburn MA 01801 USA in February 2006 Test records are outlined in Chomerics Test Report EM14445 06 We hereby declare that the equipment specified conform
10. USB DIO24H 37 USB based High Drive 24 bit Digital I O Module User s Guide MEASUREMENT COMPUTING USB DIO24H 37 Digital Input Output User s Guide A A MEASUREMENT COMPUTING Document Revision 2 May 2006 Copyright 2006 Measurement Computing Corporation Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Refer to www mccdaq com execteam html for the names titles and contact information of each key executive at Measurement Computing Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our two missions To offer the highest quality computer based data acquisition control and GPIB hardware and software available at the best possible price To offer our customers superior post sale support FREE Whether providing unrivaled telephone technical and sales support on our latest product offerings or continuing that same first rate support on older products and operating systems we re committed to you Lifetime warranty Every hardware product manufactured by Measurement Computing Corporation is warranted against defects in materials or workmanship for the life of the product Products found defective are repaired or replaced promptly Lifetime Harsh Environme
11. are sinking current into the USB DIO24H 37 Output Source current limits The maximum allowed current draw for a typical desktop computer and self powered hub is 500 mA You must account for the supply current drawn from the USB supply for the USB DIO24H 37 itself plus the current used by each DIO line Since each DIO line can output 15 mA maximum 24 DIO x 15 mA 360 mA maximum rating for the chips Output sink current limits Each USB DIO24H 37 DIO output can sink up to 64 mA For an individual line this is not a problem But if you were to apply this maximum load to all 24 DIO lines you would damage the USB DIO24H 37 because the total amount of current is well over the maximum for the USB supply If you want to sink the maximum of 64 mA per DIO line you can only do so with up to six lines To sink current with all 24 DIO outputs at any one time you can sink a maximum of 18 mA per line 3 3 Chapter 4 Specifications Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Digital input output Table 1 Digital I O specifications Digital input type 74ACT373 Digital output type 74FCT244 Number of I O 24 Port A Bit 0 through Port C Bit 7 Configuration 2 banks of 8 and 2 banks of 4 or 3 banks of 8 Pull up pull down configuration Internal 47K resistors configured for pull up to 5 V Input high voltage 2 0 V min 5 5 V absolute max
12. ct asp dept id 1238 pf id 241 CIO SPADES0 16 X 4 termination panel which mates with both 37 pin and 50 pin connectors Details on this product are available on our web site at www mccdaq com pdfs screw pdf SSR RACK08 24 channel solid state I O module rack Details on this product are available on our web site at www mccdaq com cbicatalog cbiproduct asp dept_id 122 amp pf_id 620 SSR RACK24 24 channel solid state I O module rack Details on this product are available on our web site at www mccdaq com cbicatalog cbiproduct asp dept_id 122 amp pf_id 1193 2 4 Chapter 3 Functional Details Components The USB DIO24H 37 has the following external components as shown in Figure 3 1 37 pin I O connector USB connector LED N 9 an N Q A faa 0 lt USB Connector 37 pin I O connector Figure 3 1 USB DIO24H 37 components 37 pin I O connector The 37 pin connector provides 24 digital I O one counter six ground and two power connections The digital I O port is configured as two 8 bit and two 4 bit ports based on an 82C55 mode 0 emulation You can configure each port independently for input default or output The CTR signal is the input to the 32 bit external event counter The internal counter increments when the TTL levels transition from low to high The counter can count frequencies of up to 1 MHz The six ground GND pins are identical and pro
13. h your USB DIO24H 37 shipment ccecccesseesecesecesecesecseecaeeeneeeeeeseeseeeecesecneeeneenaeenaes 2 1 Hard Wares sits E eee LS BAA SE E ee ee Additional documentation Optional components 00 0 ccceseessessceseceseeseesecesecsceeseesecssecsseeseesecsaecseeeseeseceaecaeeeseeseceaecaeeeaceseceecsaecaeeseesecaaecaeeeeeeaeeeaeeneees Unpacking the USB DIO24H 37 i i c ccchccciccceccsceccedeceescs aliada 2 2 RE 2 2 Installing the USB DIO24H 37 ccecccesecsseesseeseessceseesneeecesecnseessecseceaeceaecaaecaeecaeeeaeeeneeeeeseseseeseensenseenseenaes 2 2 Connecting the USB DIO24H 37 to your system ccccssessseescesecsseeseeseceaecseeeseeseceaecneeescesesecaaecseeeeeaecaaecaeeesenseeaeeneees 2 2 Connecting the board for I O operations 20 0 0 cecceeseesseesseeseeesceeeceeceseeseceaecnaecaaecseecaeeeseeeaeeeeeenecsereneenseneenaes 2 3 Connectors cables main I O COMMECCtOL ccecceeseeesceseesseeseesecesecsceesceseceaecaeeescssecsaecaeeseeeeesecsaecaeceecaecaaecseeeeensecaeeneees 2 3 Pin Out main VO COMA iia 2 3 Chapter 3 Functional Detail Ss enced Sou iaa COMIPONENIS Za ceases O oSesseagesseditinbes aces EA AA ER 37 pin I O connector USB connector LED tot Pulls p Tesista A a a dieu henna POW COMSUIIP tl OM ge da e a e r RE Ea bt Output source current limits 2 0 eeeceesceeececeseeseesecaecsseeseesecsaecseeeseesecsaecaseseeeeeeseceaecseeeeeesecsaecseeeeeeseceaecaeeeeeeaeeaeeneees 3
14. ion and conditioning section on page 2 4 for a complete list of compatible accessory products Unpacking the USB DIO24H 37 As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the USB DIO24H 37 from its packaging ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge If any components are missing or damaged notify Measurement Computing Corporation immediately by phone fax or e mail Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdaq com 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 mccdag com PDFmanuals DA Q Software Quick Start pdf Installing the USB D1024H 37 Be sure you are using the latest system software Before you connect the USB DIO24H 37 make sure that you are using the latest versions of the USB drivers Before installing the USB DIO24H 37 download and install the latest Microsoft Windows updates In particular when using Windows XP make sure you have XP Hotfix KB822603 installed This update is intended to address a serious error in Usbport sys when you operate a USB device You can run Windows U
15. manuals and help topic titles and to emphasize a word or phrase For example The JnstaCal 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 DIO24H 37 MCC s Specifications USB DIO24H 37 the PDF version of the Electrical Specification Chapter in this guide is available on our web site at www mccdaq com pdfs USB DIO24H 37 pdf MCC s Quick Start Guide is available on our web site at www mccdaq com PDFmanuals DAQ Software Quick Start pdf MCC s Guide to Signal Connections is available on our web site at www mccdaq 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 forLabVIEW User s Guide is available on our web site at www mecdag com PDFmanuals SM UL LabVIEW pdf USB DIO24H 37 User s Guide this document is also available on our web site at www mcecdag com PDFmanuals USB DIO24H 37 pdf Chapter 1 Introducing the USB DIO24H 37 Overview USB DIO24H 37 features This manual explains how to install configure and use the USB DIO24H 37 digital I O
16. n advance of the possibility of such damages HM USB DIO24H_37 doc 11 Trademark and Copyright Information TracerDAQ Universal Library InstaCal Harsh Environment Warranty Measurement Computing Corporation and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Windows Microsoft and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation LabVIEW is a trademark of National Instruments CompactFlash is a registered trademark of SanDisk Corporation All other trademarks are the property of their respective owners Information furnished by Measurement Computing Corporation is believed to be accurate and reliable However no responsibility is assumed by Measurement Computing Corporation neither for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and
17. nt Warranty We will replace any product manufactured by Measurement Computing Corporation that is damaged even due to misuse for only 50 of the current list price I O boards face some tough operating conditions some more severe than the boards are designed to withstand When a board becomes damaged just return the unit with an order for its replacement at only 50 of the current list price We don t need to profit from your misfortune By the way we honor this warranty for any manufacturer s board that we have a replacement for 30 Day Money Back Guarantee You may return any Measurement Computing Corporation product within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it Please call for an RMA number first No credits or returns accepted without a copy of the original invoice Some software products are subject to a repackaging fee These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified i
18. or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems which a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people 111 Table of Contents About this User s Guide eones v What you will learn from this user s guide 0000 0000 eeen enn nono nrnn nono ronn ron nn rra r rn rra nr narran rra v Conventions inthis used nadal tad dao datada de dl poe do hs v Where to find more informaatiota aa eere ea E e K EEA E SE ET EEEa E AEAEE Eae eea v Chapter 1 Introducing the USB DIO24H 37 sssssusseunnnneunnnnnnnnnnnunnnnnnnnnnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nennen 1 1 Overview USB DIO24H 37 features cccccecsseesceesceeseesceescesecnseceseceaeceaecsaecaeecaeeeseseneseeeseeeeceseenecenseenseenaes 1 1 USB DIO24H 37 block diarreas 1 1 S ltw fe de dl 1 2 Connecting a USB DIO24H 37 to your computer is aSy 00 0000 1 2 Chapter 2 Installing the USB DIO24H 37 ccccccceeeeeseee ener ee eeeeeeaeeeeeeeee eae aaeeeeeseeesegeeaaeeeeeseeeseneeeaneeseeeenseeeees 2 1 What comes wit
19. ould turn back on Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB DIO24H 37 or you may lose data and or your ability to communicate with the USB DIO24H 37 Connecting the board for I O operations Connectors cables main l O connector Table 2 1 lists the board connectors compatible cables and compatible accessory products for the USB DIO24H 37 Table 2 1 Board connectors cables and accessory equipment VO connector type 37 pin D type connector Compatible cable C37FFS x cable shielded round cable x length in feet Figure 2 3 C37FF x unshielded ribbon cable x length in feet Figure 2 4 Compatible accessory products with the SCB 37 C37FFS x and C37FF x cables CIO MINI37 CIO MINI37 VERT CIO ERB08 CIO SERB08 CIO ERB24 CIO SPADES0 SSR RACKO8 SSR RACK24 Pin out main I O connector O 5 20 1 EIR GND 21 2 NC PortC Bit7 22 3 Port B Bit 7 PortC Bit6 23 4 Port B Bit6 Port C Bit5 24 5 PortB Bit5 Port C Bit4 25 6 PortB Bit 4 Port C Bit3 26 7 Port B Bit 3 Port C Bit2 27 8 Port B Bit 2 PortC Bit1 28 9 Port B Bit 1 PortC BitO 29 10 Port B BitO PortABit 7 30 11 GND PortABit6 31 12 NC PortABit5 32 13 GND PortABit4 33 14 NC PortABit3 34 15 GND PortABit2 35 16 NC PortABit1 36 17 GND PortABitO 37 18 5 19 GND O Figure 2 2 Main I O connector pin out 2 3 USB DIO24H 37 User s Guide Installing the USB DIO24H 37
20. pdate or download the update from www microsoft com downloads details aspx familyid 733dd867 56a0 4956 b7fe e85b688b7f86 amp displaylang en For more information refer to the Microsoft Knowledge Base article Availability of the Windows XP SP1 USB 1 1 and 2 0 update This article is available at support microsoft com kbid 822603 Connecting the USB DIO24H 37 to your system To connect the USB DIO24H 37 to your system connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer The USB cable provides communication to the USB DIO24H 37 When you connect the USB DIO24H 37 for the first time multiple Found New Hardware popup balloons Windows XP or dialogs other Windows versions appear as the USB DIO24H 37 is detected J Found New Hardware x USB DIO24H 37 S USB DIO24H 37 Windows has found new hardware and is locating the software for it When installation is complete the USB LED should flash and then remain lit This indicates that communication is established between the USB DIO24H 37 and your computer 2 2 USB DIO24H 37 User s Guide Installing the USB DIO24H 37 If the USB LED turns off If the USB LED is lit but then turns off the computer has lost communication with the USB DIO24H 37 To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the USB LED sh
21. ptop PC that is not connected to an external power adapter is an example of a battery powered root port hub If your laptop is constrained to the 100 mA maximum a USB DIO24H 37 is not guaranteed to work In order to use the product you will need to purchase a self powered hub Note 3 A low side resettable fuse protects the USB DIO24H 37 This is designed to protect the host PC or hub from an over current condition Assuming all return currents in sinking applications return via the USB cable ground signal the maximum allowable return current is 500 mA Please include the USB DIO24H 37 unloaded operating current 135 mA in your power budget 4 1 USB DIO24H 37 User s Guide Specifications Counter Table 2 Counter specifications Pin name Note 4 CTR Counter type Event counter Number of channels 1 Input source CTR screw terminal Input type TTL rising edge triggered Resolution 32 bits Schmidt trigger hysteresis 20 mV to 100 mV Input leakage current uA Maximum input frequency 1 MHz High pulse width 500 ns min Low pulse width 500 ns min Input low voltage 0 V min 1 0 V max Input high voltage 4 0 V min 15 0 V max Note 4 CTR is a Schmitt trigger input Data transfer rates Table 3 Data transfer rate specifications Digital I O transfer rates software paced Digital input 62 port reads or single bit reads per second typical Digital output
22. s Parameter Conditions Specification USB controller clock error 236 30 ppm max 0 to 70 C 50 ppm max Device type USB 1 1 low speed Device compatibility USB 1 1 USB 2 0 Environmental Table 6 Environmental specifications Operating temperature range 0 to 70 C Storage temperature range 40 to 85 C Humidity 0 to 90 non condensing Mechanical Table 7 Mechanical specifications Dimensions 119 mm L x 84 mm W x 14 mm H USB cable length 3 meters max USB cable type A B cable UL type AWM 2527 or equivalent min 24 AWG VBUS GND min 28 AWG D D 3 meters max User connection length Main connector and pin out Table 8 Connector specifications 37 pin D type C37FF x unshielded ribbon cable x length in feet C37FFS x cable shielded round cable x length in feet SCB 37 CIO MINI37 CIO MINI37 VERT CIO ERB08 CIO SERB08 CIO ERB24 CIO SPADE50 SSR RACK08 SSR RACK24 Connector type Compatible cables Compatible accessory products with the C37FFS x and C37FF x cable 4 3 USB DIO24H 37 User s Guide Specifications Table 9 Connector pin out Pin Signal name Pin Signal name 1 CTR 20 5 2 NC 21 GND 3 Port B Bit 7 22 Port C Bit 7 4 Port B Bit 6 23 Port C Bit 6 5 Port B Bit 5 24 Port C Bit 5 6 Port B Bit 4 25 Port C Bit 4
23. s to the above Directives and Standards 2 ag 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. vide a common ground for all USB DIO24H 37 functions The two power pins 5V draw power from the USB connector Each pin is a 5 volt output that is supplied by the computer 3 1 USB DIO24H 37 User s Guide Functional Details Caution The 5 V pins are outputs Do not connect to an external power supply or you may damage the USB DIO24H 37 and possibly the computer When configured for input you can use the USB DIO24H 37 digital I O terminals to detect the state of any TTL level input Refer to the schematic shown in Figure 3 2 If you set the switch to the 5 V input Port AO reads TRUE 1 If you move the switch to GND Port AO reads FALSE Port A Bit 0 gt GND 5 V Figure 3 2 Schematic showing switch detection by digital channel Port AO For more information on digital signal connections For more information on 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 USB connector The USB connector provides 5 V power and communication The voltage supplied through the USB connector is system dependent and may be less than 5 V No external power supply is required LED The LED indicates the communication status of the USB DIO24H 37 It uses up to 5 mA of current and cannot be disabled Table 3 explains the function of the USB DIO24H 37 LED Table 3 1 LED Illumination When
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