USB-QUAD08 User`s Guide
Contents
1. Parameter Specification Number of I O 8 independent Configurable Timer outputs DIO6 DIO7 only Terminal count Modulo Input Output default Input Input characteristics Weak 10 resistor pulled up to 5V with protection diode Vysg diode drop Input high 2 0 V to 42 4 50 VDC Input low OV to 0 8 V Output Output characteristics Open collector Darlington transistors with CEMF suppression diodes ULN2803 Output logic supply User voltage supply up to 50 VDC 42 4 V px for strong drive Supply CLMP Connect to logic supply positive terminal up to 50 VDC 42 4 V Output high 2 0 VDC to 50 VDC 42 4 Vy dependent upon logic supply Output low 0 8 V Output sink current 500 mA per pin 2 5 A max per device parallel connections for higher current needs requires external supply Output generation Counter events or timer outputs bits 6 and 7 asynchronous generation Asynchronous throughput 4000 updates second typ tested on Windows XP and Windows Vista32 Timer outputs Number of channels Two 16 bit Timer Output 0 DIO6 Timer Output 1 DIO7 Effective frequency range 0 01123 Hz to 5 MHz Trigger and pacer Table 4 Trigger and pacer specifications Parameter Specification Digital type Edge level sensitive software selectable Trigger types Start acquisition process Pacer La2. nennen eene en eerte tene 7 Hard Ware ayers i ERREICHEN REN UM EEA Documentation Optional components i ota rites e ara 7 Unpacking the USB QU ADJOGS 7 Installing the softWare 5 aser PERIERE ERES o va Hib da CER ET REV 7 Configuring the channel input mode sse nennen trennen een rennen ennt tenete 8 Installing the hard Wate rre te eon tbe eee eic tp eie te FER Ud 8 Connecting the USB QUADOS to your system 9 Signal connections eene Dp et oeste RR IP a ERI RP DRE GO BREED ERO POP RU Eg ts Screw terminal pinout t rte erbe ER E XS UE iet e ROS E 37 pin connector pinout J12 and J50 ADIOS ER NIPAEIBEO EIN DIN Pail recte eda pire ple eee Connecting the USB QUADOS to an 4 15 Chapter 3 Functional Details s 17 USB QUADOS block diagram iet 17 External components ree iei dr tp pe II RE E rere e Retire tenerte 18 Screw terminals iere eer ren ere rede EU e iade Mee C poto petet eere pe en 18 37spin connectors 112 30 eia aene dte 19 LED URBE enn pee he epe bm e 19 DSB COBeCtOE ore re RO ERN ENT ek 19 Counter ua see p e e Ote UR etu dti a Aiea d Gest oe Pene 19 Quadrature counter mode RENNES s
3. _ Figure 1 Channel input mode switch Figure 2 shows the locations for the counter input mode switches and the counter LEDs Using the board orientation shown in Figure 2 slide the switch to the left toward the USB connector for single ended mode or to the right towards the 37 pin connector for differential mode Note that the dot is visible on the switch when configured for differential mode regardless of the board orientation By default the board is shipped with the counter inputs configured for single ended operation as shown in Figure 2 Counter ep Counter Counter ep Counter input6 6 4 input 4 input 2 2 0 inputO GSSSSSSG 99956666 j 999999 999999 99996696 mmm 30 27 28 29 25 26 10 9 23 24 S8 S7 F4 5 4 MEASUREMENT Vh ANS COMPUTING USB QUAD08 15 16 S20 1 S2 S18 S3 S4 S19 S5 S6 S21 a li oooooooo i j oooooooo i oooooooo 1 oooooooo j oooooooo Counter gp LED Counter Counter gp LED Counter input7 7 5 input 5 input 3 3 1 input 1 Figure 2 Input mode switch and LED locations The following table lists the counter input channel associated with each switch Counter input channel Input 0 1 2 3 4 5 6 7 Phase A S7 S5 S23 S3 S26 1 28 15 Phase B S8 S6 S9 54 525 52 527 16 Index S24 S21 S10 S19 S29 S18 30 20 Installing the hardware Install the DAQ software befor
4. 83 us Input Table 2 Input specifications Parameter Specification Receiver type SN75ALS175 quad differential receiver Configuration 8 channels Each channel consists of PhaseA input PhaseB input and Index input each input is selectable as single ended or differential Differential PhaseA PhaseB and Index inputs at the user connector are routed to the inputs of differential receiver PhaseA PhaseB and Index inputs at the user connector are routed to the inputs of the differential receiver Single ended PhaseA PhaseB and Index inputs at the user connector are routed to the inputs of the differential receiver PhaseA PhaseB and Index inputs at the user connector are left floating The inputs of the differential receiver are routed to the 3 V reference Common mode input voltage range 2 Differential input voltage range 2 Input sensitivity 200 mV Input hysteresis 50 mV typ Input impedance 12 Absolute maximum input voltage 14 V max Miscellaneous Meets or exceeds ANSI EIA TIA 422 B EIA TIA 423 B RS 485 Meets ITU recommendations V 10 V 11 X 26 X 27 Designed for multipoint busses on long lines and in noisy environments 29 USB QUADO0S User s Guide Specifications Digital I O Timer outputs Terminal count outputs Table 3 Output specifications
5. A e EA iS 30 Indicator LEDs ue ERR ERR REUNIR EUREN EU EE RUE E REUS EUR 30 M 31 Environmental eth ae deen ase nal 31 Mechanical ate ipee inei RE 31 USB specificatiOns terere e DUE 31 I O 32 Screw terminal 33 pi COMNECLOTS sm oom o i 35 Declaration of aan 37 Preface About this User s Guide What you will learn from this user s guide This user s guide describes the Measurement Computing USB QUADOS 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 QUADOS is available on our website
6. Counter 3 Phase A low Encoder power output Counter 3 Phase B low Encoder power output Counter 1 Phase A low Encoder power output Counter 1 Phase B low Encoder power output Counter 1 Index low Counter 4 Phase A high Counter 4 Phase B high Ground Counter 4 Index high Counter 6 Index low Counter 6 Phase A high Counter 6 Phase B high Ground Counter 6 Index high Counter 7 Index low Counter 7 Phase A high Counter 7 Phase B high Ground Counter 7 Index high Counter 5 Phase A high Counter 5 Phase B high Ground Counter 5 Index high Figure 5 Differential mode pinout Pin assignments for single ended mode are shown in Figure 6 Counter 0 Phase A high Counter 0 Phase high Ground Counter 0 Index high Floating Counter 2 Phase A high Counter 2 Phase B high Ground Counter 2 Index high Floating Counter 3 Phase A high Counter 3 Phase B high Ground Counter 3 Index high Counter 1 Phase A high Counter 1 Phase B high Ground Counter 1 Index high OPHA GND OINDX 2INDX 2PHA 2PHB GND 2INDX SINDX 3PHA GND 3INDX 1 1PHB GND 1INDX OPHA ENC 2 2 1PHA ENC 1PHB 10 11 12 13 14 15 16 17 18 19 412 OINDX 1INDX Floating Encoder power output Floating Encoder power output Floating No connection Floating Enc
7. 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 Immunity EN 61326 1 2006 Table 3 EC 61000 4 2 2001 Electrostatic Discharge immunity EC 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 Ocables must be less than 3 meters 9 75 feet in length The host computer must be properly grounded The host computer 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 May 2009 Test records are outlined in Chomerics Test Report EMI5334 09 We hereby declare that the equipment specified conforms to the above Directives and Standards Kore Carl Haapaoja Director of Quality Assurance Measurement Computing Corporation 10 Commerce
8. Ground Counter 1 Phase A high 1 Counter 1 Phase low 1 Counter 1 Phase B high 1 Counter 1 Phase B low 1PHB Counter 1 Index high 1INDX Counter 1 Index low 1INDX Ground GND OINDX Counter 0 Index low OINDX Counter 0 Index high OPHB Counter 0 Phase B low OPHB Counter 0 Phase B high OPHA Counter 0 Phase A low OPHA Counter 0 Phase A high Encoder power output oooooooo 9099099 Figure 3 Differential mode pinout 10 USB QUADOS User s Guide Installing the USB QUADOS Pin assignments for single ended mode are shown in Figure 4 DIO channel 7 DIO7 DIO6 DIO Channel 6 DIO channel 5 DIO5 Q DIO4 DIO Channel 4 DIO channel 3 DIO3 O DIO2 DIO Channel 2 DIO channel 1 0101 0100 DIO Channel 0 Ground GND O Q GND Ground Encoder power input ENC IN O Q XPCR External pacer input protection for DIO CLMP O Q XTRIG External trigger input Power output 5V O 5V Power output Encoder power output ENC O Q GND Ground Counter 7 Phase Ahigh 7PHA O Sines Floating 7PHA O o im Coun er 6 Index hig Counter 7 Phase high 7PHB S ere ros ng Floating 7PHB O HA Coun er 6 Phase B hig uds c AE CH 9 g GPHA Counter 6 Phase A high oatin Bose GND IS Q Encoder power output rd Encoder power output ENC S c anD Groun t Ph A high PHA oatin 02 4INDX Courier 4 Index high Counte
9. at www mccdaq com You can also contact Measurement Computing Corporation by phone fax or email with specific questions 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 QUAD08 The USB QUADOS is a USB 2 0 high speed device supported under popular Microsoft Windows operating systems The device is compatible with both USB 1 1 and USB 2 0 ports The USB QUADOS provides the following features Eight counter inputs quadrature non quadrature mode Simultaneous input and decoding of up to eight incremental quadrature encoders High speed pulse counter for general counting applications multiple counting modes supported Configurable as single ended or differential 10 MHz 16 32 48 bit resolution 12 volt input range Indicator LEDs show the status of each counter encoder input 0 10 O Q 16 debounce settings Eight digital I O bits o Configurable as input or output o Digital input bits accept voltage inputs up to SOVDC 42 4Vpk o Digital output bits are open collector with clamping diodes for counter electromotive force suppression Internal external pacing Internal software trigger and external digital trigger I O connections are made to ten banks of detachable screw terminals or 37 pin D type connectors The 37 pin connectors are pin compatible wit
10. can accept frequency inputs up to 10 MHz In Totalize mode phase A is used as the primary counter input Phase B can be used to set the count direction in up down counting by default the counter counts up when phase B is high 1 and counts down when phase B is low 0 The Index input can be used to gate latch decrement the counter or clear reload the counter with the MAXLIMIT value Counter inputs can be read either asynchronously or synchronously as part of a digital scan group The following table lists the options supported in Totalize mode Totalize counter mode options Counter mode Description Clear on read The counter is cleared after each asynchronous read The value of the counter before it was cleared is latched and returned Range limit When counting up The counter stops when the maximum count specified by the MAXLIMIT value is reached Counting resumes if direction is reversed or the counter is reloaded When counting down The counter will count down to 0 and then stop Counting resumes if direction is reversed or the counter is reloaded Non recycle The counter is disabled if a count overflow or underflow occurs or the MAXLIMIT value is reached A clear command via software or Index input is required to re enable the counter 20 USB QUADO06S User s Guide Functional Details Counter mode Description Modulo N Counting up When the maximum count specified by the MAXLI
11. can be used to reload the position counter which is useful at system startup when the incremental encoder cannot determine the starting position of the motor The Terminal count MAXLIMIT status can be output to the DIO terminals Each input can be debounced from 500 ns to 25 5 ms total of 16 selections to eliminate extraneous noise or to switch induced transients Encoder input signals must be within 12 V to 12 V and the switching threshold is 200 mV differential or 200 mV above 3 0 V and 50 mV typical hysteresis Refer to page 22 for additional information about Debounce mode 19 USB QUADO06S User s Guide Functional Details The following table lists the options supported in Quadrature mode Quadrature counter mode options Counter mode Description Count mode Select X1 X2 or X4 Count modes provide different levels of accuracy with respect to the encoder position counts rising edges on phase A 512 pulses In mode the encoder position is accurate to within 360 512 X2 counts rising edges and falling edges on phase A 1024 pulses total In X2 mode the encoder position is accurate to within 360 1024 X4 count rising and falling edges on both phase and phase B 1024 pulses on both phase and phase B In X2 mode the encoder position is accurate to within 360 2048 Range limit When counting up The counter stops when the maximum count specified by the MAXLIMIT value is
12. high Note that a period of stability must precede the edge in order for the edge to be accepted 2 During time period T2 the input signal is not stable for a length of time equal to the debounce time setting for this example Therefore the output stays high and does not change state during time period T2 T3 During time period T3 the input signal is stable for a time period equal to meeting the debounce requirement The output is held at the high state This is the same state as the input T4 Atanytime during time period T4 the input can change state When this happens the output will also change state At the end of time period T4 the input changes state going low and the output follows this action by going low T5 During time period 5 the input signal again has disturbances that cause the input to not meet the debounce time requirement The output does not change state After time period T6 the input signal has been stable for the debounce time and therefore any edge the input after time period T6 is immediately reflected in the output of the debounce module 23 USB QUADOS User s Guide Functional Details Debounce mode comparisons Figure 20 shows how the two modes interpret the same input signal which exhibits glitches Notice that the trigger before stable mode recognizes more glitches than the trigger after stable mode Use the bypass option to achieve maximum glitch re
13. provide up to 500 mA of current for a USB device Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A laptop PC that is not connected to an external power adapter is an example of a battery powered root port hub If your laptop PC is constrained to the 100 mA max use a self powered hub Environmental Table 7 Environmental specifications Parameter Specification Operating temperature range 0 C to 60 Storage temperature range 40 C to 85 Humidity 096 to 9096 non condensing Mechanical Table 8 Mechanical specifications Parameter Specification Dimensions L x W x H 245 x 146 x 50 mm 9 6 x 5 7 x 2 0 in USB specifications Table 9 USB specifications Parameter Specification Device type USB 2 0 high speed mode 480 Mbps if available recommended otherwise USB 1 1 full speed mode 12 Mbps Device compatibility USB 2 0 recommended or USB 1 1 USB cable type A B cable UL type AWM 2725 or equivalent min 24 AWG VBUS GND min 28 AWG D D USB cable length 3 meters max 9 84 feet 31 USB QUADO0S User s Guide Specifications I O connectors Table 10 I O Connector specifications Parameter Specification Connector type Screw terminals 10 banks detachable 37 pin D type J12 external and J50 internal Wire gauge range for screw t
14. reached Counting resumes if direction is reversed or the counter is cleared When counting down The counter will count down to 0 and then stop Counting resumes if direction is reversed or the counter is cleared Non recycle The counter is disabled if a count overflow or underflow occurs or the MAXLIMIT value is reached A clear command via software or Index input is required to re enable the counter Modulo N Counting up When the maximum count specified by the MAXLIMIT value is reached the counter rolls over to 0 and continues counting up Counting down When the count reaches 0 the counter rolls over to the maximum count specified by the MAXLIMIT value and continues counting down Quadrature mode options that are specific to the Index signal are listed below Index input mode options Quadrature mode Counter mode Description Clear on Z The counter is cleared on the rising edge of the Index signal Latching Latching mode allows the count to be latched by the Index signal Totalize counter mode The USB QUADOS can be used as a high speed pulse counter for general counting applications The counters can concurrently monitor time periods frequencies pulses and other event driven incremental occurrences directly from pulse generators limit switches proximity switches and magnetic pick ups Each counter can be configured with software as a 16 32 or 48 bit counter The counters
15. with an inductive diode clamped to the CLMP terminal for counter electromotive force suppression DO bits can withstand 50 volts and can operate via software control asynchronous The asynchronous digital output throughput is 4000 updates second typical Terminal count output When used as terminal count outputs DIOO to DIO7 indicate the count status for each corresponding counter channel The output state will go high for the period of time that the count is equal to the terminal count value or the values specified as the MAXLIMIT For example assume DIOO is set for terminal count output If counter 0 is configured for Range limit mode with MAXLIMIT set to 4 096 the output of DIOO will go high when the count reaches 4 096 counting up or 0 counting down The output remains high until counting resumes either by a direction change or by a counter reload Similarly if configured for Modulo N counting the same behavior applies except that a reset or direction change is not required to change the output state since this mode rolls over when the MAXLIMIT value is reached Once the count moves off of MAXLIMIT counting up or 0 counting down the terminal count output will go low Timer output You can use DIO6 and DIO7 as 16 bit timer outputs Each timer can generate a programmable pulse width wave with a programmable frequency in the range of 0 01123 Hz to 5 MHz At higher frequencies the timer output frequency and duty
16. MIT value is reached the counter rolls over to 0 and continues counting up Counting down When the count reaches 0 the counter rolls over to the maximum count specified by the MAXLIMIT value and continues counting down Up down Up down counting mode uses phase as the pulse source and phase B as the direction By default the counter counts up when phase 1 high and counts down when phase 0 low Totalize mode options that are specific to the Index signal are listed below Index input mode options Totalize mode Counter mode Description Gating Gating mode allows the index input to gate the counter By default the counter is enabled when the Index signal is high When the Index signal is low the counter is disabled but holds the count value Latching Latching mode allows the count to be latched by the Index signal Clear Reload Clear Reload mode allows the Index signal to reload the counter with the MAXLIMIT value Decrement Decrement mode allows the Index signal to decrement the counter Period measurement mode Use period mode to measure the period of a signal at a counter channel s phase A input You can measure x1 x10 x100 or x1000 periods 16 bit 32 bit or 48 bit values Four resolutions are available 20 83 ns 208 3 ns 2 083 us or 20 83 period measurement mode options are software selectable The 48 MHz system clock is used as the timing source Periods
17. OS 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 the device is 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 For international customers contact your local distributor Refer to the International Distributors section on our web site at www mccdaq com International Installing the software Install the DAQ software before you install your board The driver needed to run the USB QUADOS is installed with the MCC DAQ software Refer to the Quick Start Guide for instructions on installing the software on CD This booklet is available in PDF at www mccdag com PDFmanuals DAQ Software Quick Start pdf Be sure you are using the latest system software Before you install your USB QUADOS run Windows Update to update your operating system with the latest USB drivers USB QUADOS User s Guide Installing the USB QUADOS Configuring the channel input mode The counter inputs are configurable as single ended 12 V or differential 12 V differential input 14 Vmax mode via on board switches see Figure 1 __ _ Single ended Differential mode mode default 1 note the dot
18. USB QUAD08 Eight channel Quadrature Encoder Input Device User s Guide Document Revision 3 MEASUREMENT May 2012 r Copyright 2012 4 N as 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 t
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20. X 5 1 H 1 m 1 2PHA 2 2 ENC 7 3 2PHB 6PHB 4 ENC 5 2INDX 6INDX 6 2PHA 6PHA 7 2 6PHB 8 Ground Ground 9 2INDX 6INDX 1 1 3PHA 7PHA 2 g 3 3PHB 7PHB 3 ET 4 i 5 3INDX 7INDX 6 3PHA TPHA 7 7PHB 8 Ground Ground 9 3INDX 7INDX P4 Figure 8 37 pin connector to the C37F 4X9F 1M cable pinout 13 USB QUADOS User s Guide Installing the USB QUADOS C37FFS x and C37FF x pinout i Figure 9 C37FFS x cable The red stripe identifies pin 1 Figure 10 C37FF x cable Signal termination You can connect the USB QUADOS to the following accessory boards using the C37FF x or C37FFS x cable SCB 37 Signal connection box 37 conductor shielded CIO MINI37 Universal screw terminal board 37 pin CIO MINI37 DST Universal screw terminal board 37 pin detachable screw terminals CIO MINI37 VERT Universal screw terminal board 37 pin D male connector vertical CIO MINI37 VERTDST Universal screw terminal board 37 pin D male connector vertical detachable screw terminals CIO TERMIN AL Universal screw terminal board prototyping area 37 terminals Details on these products are available on our web site at www mccdaq com products screw terminal bnc aspx DIN rail moun
21. asurement Computing Corporation 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 QUAD08 docx Table of Contents Preface About this User s Guide 5 iere ser n pepe sies arae 5 What you will learn from this user s 5 Conventions in this user s guide Where to find more information Chapter 1 Introducing the USB QUADOS 6 Chapter 2 Installing the USB QUADOS What comes with your USB QUADOS shipment
22. cifications 37 pin connectors J12 Table 13 Differential mode pinout Pin Signal name Pin description Pin Signal name Pin description 1 Counter 0 Phase A low 20 Counter 0 Phase A high 2 ENC Encoder power output 21 OPHB Counter 0 Phase B high 3 Counter 0 Phase B low 22 GND Ground 4 ENC Encoder power output 23 OINDX Counter 0 Index high 5 OINDX Counter 0 Index low 24 21NDX Counter 2 Index low 6 NC No connection 25 2 Counter 2 Phase high 7 2PHA Counter 2 Phase A low 26 2 Counter 2 Phase high 8 Encoder power output 27 GND Ground 9 2PHB Counter 2 Phase B low 28 2INDX Counter 2 Index high 10 ENC Encoder power output 29 3INDX Counter 3 Index low 11 Counter 3 Phase low 30 Counter 3 Phase A high 12 ENC Encoder power output 31 Counter 3 Phase high 13 Counter 3 Phase low 32 GND Ground 14 ENC Encoder power output 33 3INDX Counter 3 Index high 15 1 Counter 1 Phase low 34 1 Counter 1 Phase high 16 ENC Encoder power output 35 1PHB Counter 1 Phase B high 17 1 Counter 1 Phase B low 36 GND Ground 18 ENC Encoder power output 37 1INDX Counter 1 Index high 19 1INDX Counter 1 Index low Table 14 Single ended mode pinout Pin Signal name Pin description Pin Signal name P
23. cognition Debounce Debounce i Debounce Time Time Time _ r N H Input i t Figure 20 Example of two debounce modes interpreting the same signal Set the debounce time according to the amount of instability expected in the input signal Setting a debounce time that is too short may result in unwanted glitches clocking the counter Setting a debounce time that is too long may result in an input signal being rejected entirely Some experimentation may be required to find the appropriate debounce time for a particular application To see the effects of different debounce time settings view the analog waveform along with the counter output This can be done by connecting the source to an analog input Use trigger before stable mode when the input signal has groups of glitches and each group is to be counted as one The trigger before stable mode recognizes and counts the first glitch within a group but rejects the subsequent glitches within the group if the debounce time is set accordingly Set the debounce time to encompass one entire group of glitches as shown in Figure 21 Debounce Time Input LLLI Trigger Before Stable Trigger After Stable Figure 21 Optimal debounce time for trigger before stable mode Trigger after stable mode behaves more like a traditional debounce function rejecting glitches and only passing state t
24. counter input modes Counter Quadrature or Totalize mode Period measurement Pulse width measurement Counter operation modes are programmable with software Some modes make use of a user configurable value called the MAXLIMIT value This value doesn t directly affect the current count but sets a limit used in some modes to determine counter behavior counter modes use the phase A input Some modes also make use of the phase B and Index inputs Each mode supports additional sub modes for counter operations Refer to the discussion of each counter mode in the pages that follow for specific information Quadrature counter mode The USB QUADOS can simultaneously decode signals from up to eight encoders Quadrature encoders with 16 bit 32 bit or 48 bit counters 10 MHz maximum pulse frequency and X1 X2 and X4 count modes are supported The USB QUADOS provides Phase A Phase X and Index inputs for each encoder connected 0 90 and zero Phase A and Phase B are generated at a 90 phase shift with respect to each other Phase A and B signals are used to determine system position counts velocity counts per second and direction of rotation The Index signal can be programmed to gate latch the current count decrement or clear reload the counter with the MAXLIMIT value The Index signal may be used to establish an absolute reference position within one count of the encoder rotation 360 This signal
25. cycle are dependent on the load impedance and the supply refer to Driving digital outputs on page 26 for more information The duty cycle is programmable The timer output rate and pulse width can be updated asynchronously at any time however doing so results in a pulse stream that is not seamless 25 USB QUADO0S User s Guide Functional Details Driving digital outputs The outputs are open collector effectively sinking current The USB QUADOS has weak 10 kQ resistors pulled up to 5V with over voltage protection Using this default configuration may not provide adequate drive for your application If minimum current is required install a 250 Q resistor from a digital output bit sinking from a 5V terminal Do not exceed 20 mA If a stronger drive strength is required use an external supply with a series resistor up to 500 mA load per digital output pin Do not exceed 2 5 A for the device Counter electro motive force CEMF suppression Counter electromotive force is the voltage or electromotive force that is induced into an inductor due to an alternating or pulsating current CEMF is caused by a changing electromagnetic field and is always in polarity opposite to that of the applied voltage The USB QUADOS provides a CLMP screw terminal to suppress For protection attach an external supply to the CLMP terminal directly do not install the supply after the series resistor Caution Each output can s
26. d 19 Totalize counter mode Period measurement mode eee er HR t i dd RV IEE jih 21 Pulse width measurement Mode sre ai a enm eer e e 21 Synchronous asynchronous scanning ann 21 Synchronous scanning Asynchronous sc nnihg oeste ce ere i S RUE daa PE al deva 22 Debouric e imode Trigcer after stable Trigger before stable mode D bounc mode compariSODS 5 n orent eren tee ere hm i e RE a Ee an en ERE perte 24 DERE ER EUER ERREUR ERI AS 25 Digital input ama a eee E E E A E A o BAR neke 25 seansi o Lied det cepa g a A O A Sele eka 25 Termmnal ount output Nee 25 Timer PE A A a IPs ea 25 Driving digital outputs epe RR ER 26 pe RR ERI DR POM 26 USB QUADO0S User s Guide PEE 27 Po o am ampera mnm neee EEEE E ETO 27 Encoder POWET 27 6r MEUM 27 Mechanical 28 Chapter 4 izle I 29 auicm EE 29 29 Digital I O Timer outputs Terminal count outputs 30 T gser and pacer cae ede
27. de Screw terminals The device has ten banks of detachable screw terminals that provide the following connections Eight encoder counter inputs Eight DIO or six DIO and two timer outputs Clamp for suppression External trigger input External pacer input External encoder power input Eight encoder power outputs Power outputs Ground 18 USB QUADO06S User s Guide Functional Details 37 pin connectors J12 J50 The USB QUADOS has two 37 pin D type connectors J12 and J50 Each connector provides Phase A B and Index connections for up to four quadrature encoder inputs Connector pinouts are shown 12 Connector J12 is on the right side of the device as shown in Figure 15 on page 18 Connector J50 is internal you must remove the board from the housing to access connector J50 LED indicators The USB QUADOS has LEDs for power and communication status see Figure 16 Additionally each encoder counter channel has an associated status LED adjacent to its screw terminal bank see Figure 2 on page 8 Power LED indicates that the device microcontroller has power and is running Status LED indicates that the USB is configured blinks to indicate USB traffic Channel LEDs indicates that the encoder counter is receiving a valid signal on any of the inputs USB connector The USB connector provides 5 V power and communication Counter input modes The USB QUADOS supports the following
28. e 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 USB QUADOS User s Guide Installing the USB QUADOS Connecting the USB QUADOS to your system To connect the USB QUADOS to your system turn on your computer and 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 When you connect the device for the first time a Found New Hardware dialog opens when the operating system detects the device Two drivers will be loaded MCC USB and USB QUAD08 The installation is complete after the drivers are loaded and the dialog closes The Status LED on the USB QUADOS should blink and then remain on indicating that communication between the device and the computer is established The Power LED blinks during device detection and initialization and then remains on When first powered on a momentary delay may occur before the Power LED begins to blink or become solid If the Status LED turns off If the Status LED turns on but then turns off the computer has lost communication with the USB QUADOS To restore communication disconnect the USB cable from the computer and then reconnect it This should
29. er power output Note 2 ENC Encoder power output Note 2 GND Ground 4PHA Counter 4 Phase A high 5INDX Counter 5 Phase A high 4PHA Counter 4 Phase A low SINDX Counter 5 Phase A low 4PHB Counter 4 Phase B high 5PHB Counter 5 Phase B high 4PHB Counter 4 Phase B low 5PHB Counter 5 Phase B low 4INDX Counter 4 Index high 5 Counter 5 Index high 4INDX Counter 4 Index low 5PHA Counter 5 Index low GND Ground ENC Encoder power output Note 2 ENC Encoder power output Note 2 GND Ground 6PHA Counter 6 Phase A high 7INDX Counter 7 Phase A high 6PHA Counter 6 Phase A low 7INDX Counter 7 Phase A low 6PHB Counter 6 Phase B high 7PHB Counter 7 Phase B high 6PHB Counter 6 Phase B low 7PHB Counter 7 Phase B low 6INDX Counter 6 Index high 7PHA Counter 7 Index high 6INDX Counter 6 Index low 7PHA Counter 7 Index low GND Ground ENC Encoder power output Note 2 5V Power output 5V Power output XTRIG External trigger input CLMP protection for DIO Note 5 XPCR External pacer input ENC IN Encoder power input Note 2 GND Ground GND Ground DIOO DIO channel 0 DIO1 DIO channel 1 DIO2 DIO channel 2 DIO3 DIO channel 3 DIO4 DIO channel 4 DIO5 DIO channel 5 DIO6 DIO channel 6 Note 3 DIO7 DIO channel 7 Note 4 Note 2 External supply when operating in encoder mode ENC IN is passed to all ENC lines with optional protection diodes to prevent reverse connection Note 3 DIOG can also function as Time
30. erminals 16 AWG to 28 AWG Compatible cable with the C37F 4X9F 1M connectors 37 pin connectors C37FF x C37FFS x Compatible accessory SCB 37 products with the 37 pin CIO MINI37 CIO MINI37 DST CIO MINI37 VERT CIO MINI37 VERTDST CIO TERMINAL 32 USB QUADOS User s Guide Specifications Screw terminal connectors Table 11 Differential mode pinout Signal name Terminal description Signal name Terminal description ENC Encoder power output Note 2 GND Ground OPHA Counter 0 Phase A high 1INDX Counter 1 Phase A high Counter 0 Phase low 1INDX Counter 1 Phase A low Counter 0 Phase B high 1PHB Counter 1 Phase B high Counter 0 Phase low 1PHB Counter 1 Phase B low OINDX Counter 0 Index high 1 Counter 1 Index high OINDX Counter 0 Index low 1PHA Counter 1 Index low GND Ground ENC Encoder power output Note 2 ENC Encoder power output Note 2 GND Ground 2PHA Counter 2 Phase A high 3INDX Counter 3 Phase A high 2 Counter 2 Phase A low 3INDX Counter 3 Phase A low 2PHB Counter 2 Phase B high Counter 3 Phase B high 2PHB Counter 2 Phase B low Counter 3 Phase B low 2INDX Counter 2 Index high Counter 3 Index high 2INDX Counter 2 Index low 3PHA Counter 3 Index low GND Ground ENC Encod
31. etails USB QUADOSG block diagram USB QUADOS functions are illustrated in the block diagram shown here PHA PHB PHA 5 PHB 9 8 INDX 8 PHB 8 x 8 INDX 8 PHA PHB 4 PHA 4 PHB 8 3 0V ref USB PC Address 20 Internal clamp diode Figure 14 USB QUADOS functional block diagram 17 USB QUADOS User s Guide Functional Details External components The USB QUADOS has the following external components as shown in Figure 15 10 Screw terminal banks 37 pin I O connector J12 Device Power and Status LEDs USB connector Counter encoder channel LEDs not shown below refer to Figure 2 on page 8 for each location Counter input 1 connections Counter input 3 connections Counter input 5 connections Counter input 7 connections DIO1 3 5 7 ENC IN power connections USB connector and LEDs Figure 16 10 11 12 DIO2 4 6 8 trigger pacer and power connections Counter input 6 connections Counter input 4 connections Counter input 2 connections Counter input 0 connections 37 pin I O connector J12 Figure 15 USB QUADOS external components The LEDs and USB connector locations are shown in Figure 16 1 Power LED top and Status LED bottom 2 USB connector Figure 16 Power Status LEDs USB connector device left si
32. from sub microsecond to many seconds can be measured Counter channel inputs are read synchronously using period mode Pulse width measurement mode Use pulse width mode to measure the time from the rising edge to the falling edge or vice versa on a signal on phase A counter input Four resolutions are available 20 83 ns 208 3 ns 2 083 us or 20 83 us pulse width measurement mode options are software selectable The 48 MHz system clock is used as the timing source Pulse widths from sub microsecond to many seconds can be measured Counter channel inputs are read synchronously using pulse width mode Synchronous asynchronous scanning Counter inputs can be read asynchronously under program control or synchronously as part of a digital scan group Synchronous scanning When read synchronously the count of each channel counter is set to 0 and latched at the beginning of the synchronous acquisition Each clock pulse start of scan signal initiates a scan of all channels specified Each time the USB QUADOS receives a start of scan signal the counter values are latched and are available to the device The values returned during scan period 1 are always zero The values returned during scan period 2 reflect what happened during scan period 1 The scan period defines the timing resolution To achieve a higher timing resolution shorten the scan period Use of terminal count outputs is not recommended in conjunction with synchrono
33. h the PCI QUADOA for upgrade migration from a PCI bus although software migration is required The USB QUADOS is powered by the 5 volt USB supply from your computer When operating in encoder mode the USB QUADOS passes an external supply of up to 50 VDC current rated at 1 5 A 5 VDC through the ENC IN screw terminal to all connected ENC terminals Chapter 2 Installing the USB QUAD08 What comes with your USB QUAD08 shipment As you unpack your USB QUADOS verify that the following components are included Hardware USB QUAD08 USB cable 2 meter length Documentation In addition to this hardware user s guide you should also receive the Quick Start Guide This 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 Optional components If you ordered any of the following products with your board they should be included with your shipment Cables C37F 4X9F 1M o C37FFS x o C37FF x Signal termination accessories MCC provides signal termination products for use with the USB QUADOS Refer to Signal termination on page 14 for a list of compatible accessory products ACC 202 DIN rail kit Unpacking the USB QUAD08 As with any electronic device take care while handling to avoid damage from static electricity Before removing the USB QUAD
34. he 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 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 mccdaq conylegal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2012 Me
35. in description 1 Floating Note 11 20 Counter 0 Phase 2 ENC Encoder power output 21 OPHB Counter 0 Phase B 3 Floating Note 11 22 GND Ground 4 Encoder power output 23 OINDX Counter 0 Index 5 OINDX Floating Note 11 24 2INDX Floating Note 11 6 NC No connection 25 2PHA Counter 2 Phase A 7 2 Floating Note 11 26 2 Counter 2 Phase B 8 Encoder power output 27 GND Ground 9 2PHB Floating Note 11 28 2INDX Counter 2 Index 10 ENC Encoder power output 29 SINDX Floating Note 11 11 Floating Note 11 30 Counter 3 Phase 12 ENC Encoder power output 31 3PHB Counter 3 Phase B 13 Floating Note 11 32 GND Ground 14 ENC Encoder power output 33 3INDX Counter 3 Index high 15 1 Floating Note 11 34 1 Counter 1 Phase 16 Encoder power output 35 1 Counter 1 Phase B 17 1PHB Floating Note 11 36 GND Ground 18 ENC Encoder power output 37 1INDX Counter 1 Index 19 1INDX Floating Note 11 Note 11 In single ended mode the PhaseA PhaseB and Index inputs at the user connector are left floating The inputs of the differential receiver are routed to 3 V reference 35 USB QUADOS User s Guide Specifications J50 Table 15 Differential m
36. ink up to 500 mA Ensure that the entire device up to 5 outputs sinks less than 2 5 Alternately all outputs can sink 300 mA Figure 23 below shows the digital output timer output circuit USB QUAD08 Darlington FPGA transistor with CEMF suppression USB QUAD08 Figure 23 Digital timer output channel circuit Triggering You can trigger a synchronous acquisition of counter data internally with software or externally using the XTRIG digital trigger input screw terminal The XTRIG input allows TTL level triggering with latencies guaranteed to be less than 1 us The acquisition can be triggered on a rising or falling edge or on a high or low level The trigger input is TTL logic Latency is one sample period maximum The input signal range is 0 5 to 7 V maximum The logic level 1 or 0 and the rising or falling edge for the discrete trigger input are software selectable 26 USB QUADO06S User s Guide Functional Details Pacing You can pace synchronous acquisition of counter data by the onboard clock or by an external clock connected to the XPCR external pacer input terminal Power The total supply current at the 5V terminal is 480 mA maximum including DIO The total supply current shared between the 5V terminals is 20 mA maximum You can use the 5V terminal to supply power to external devices or circuitry Caution The 5V terminals are outputs Do not connect to an external power supply
37. nsure that the signals are connected such that there is no potential between PC ground and signal ground Make sure that the current output specification is not exceeded Figure 12 shows the differential input connections to one encoder to Encoder A OPHA to Encoder A OPHB to Encoder OPHB to Encoder B OINDX to Encoder Z OINDX to Encoder Z Encoder supply to to Encoder OPHA to Encoder to Encoder OPHB to Encoder B OINDX to Encoder 7 OINDX to Encoder Z GND Ground to GND pin 9900099 Supply return GND Pass through ENC IN Supply GND 9999 USB QUAD08 Encoder Figure 12 Differential encoder connections to the screw terminal or 37 pin connector 15 USB QUADOS User s Guide Installing the USB QUADOS Figure 13 shows the single ended input connections to one encoder Encoder supply to to Encoder OPHB to Encoder B NC OINDX to Encoder Z NC GND Ground to GND pin OPHA to Encoder A 5955609966 OPHB to Encoder OINDX to Encoder Z Supply return GND Pass through ENC IN Supply GND 595599996 USB QUAD08 Encoder Figure 13 Single ended encoder connections to the screw terminal or 37 pin connector 16 Chapter 3 Functional D
38. ode pinout Pin Signal name Pin description Pin Signal name Pin description 1 4PHA Counter 4 Phase A low 20 4 Counter 4 Phase high 2 ENC Encoder power output 21 4PHB Counter 4 Phase B high 3 4 Counter 4 Phase B low 22 GND Ground 4 ENC Encoder power output 23 4INDX Counter 4 Index high 5 4INDX Counter 4 Index low 24 6INDX Counter 6 Index low 6 NC No connection 25 6PHA Counter 6 Phase A high 7 6 Counter 6 Phase A low 26 6 Counter 6 Phase high 8 Encoder power output 27 GND Ground 9 6PHB Counter 6 Phase B low 28 6INDX Counter 6 Index high 10 ENC Encoder power output 29 7INDX Counter 7 Index low 11 7PHA Counter 7 Phase A low 30 7PHA Counter 7 Phase A high 12 ENC Encoder power output 31 7PHB Counter 7 Phase B high 13 7PHB Counter 7 Phase B low 32 GND Ground 14 ENC Encoder power output 33 7INDX Counter 7 Index high 15 5 Counter 5 Phase A low 34 5 Counter 5 Phase high 16 Encoder power output 35 5PHB Counter 5 Phase B high 17 5PHB Counter 5 Phase B low 36 GND Ground 18 ENC Encoder power output 37 5INDX Counter 5 Index high 19 5INDX Counter 5 Index low Table 16 Single ended mode pinout Pin Signal name Pin description Pin Signal name Pin description 1 4PHA Floating Note 12 20 4PHA Counter 4 Phase A 2 ENC Encoder power output 21 4PHB Counter 4 Phase B 3 4PHB Floating Note 12 22 GND Ground 4 ENC Encoder power output 23 4INDX Counter 4 Index 5 4INDX Floa
39. oder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Counter 4 Phase A high Counter 4 Phase B high Ground Counter 4 Index high Floating Counter 6 Phase A high Counter 6 Phase B high Ground Counter 6 Index high Floating Counter 7 Phase A high Counter 7 Phase B high Ground Counter 7 Index high Counter 5 Phase A high Counter 5 Phase B high Ground Counter 5 Index high Figure 6 Single ended mode pinout 4PHA 4 GND 4INDX 6INDX 6PHA 6PHB GND 6INDX 7TINDX 7 7PHB GND 7INDX 5PHA 5PHB GND 5INDX 4PHA 4PHB GND 4INDX 6INDX 6PHA 6PHB GND 6INDX TINDX TPHA 7PHB GND 7INDX 5PHA 5PHB GND SINDX 20 1 2 21 2 22 5 23 24 2 25 6 26 27 28 10 29 11 30 12 31 13 32 14 33 15 34 16 35 17 36 2 18 19 J50 20 1 21 22 23 24 z 25 26 27 28 10 22 11 30 12 31 13 32 44 33 15 34 16 35 17 36 18 19 J50 4PHA ENC 4PHB ENC 4INDX 6PHA 6PHB ENC 7 7PHB ENC 5 5PHB ENC 5INDX 4PHA 4 4INDX NC 6PHA 6PHB 7PHA ENC 7PHB ENC 5PHA ENC 5PHB 5INDX Counter 4 Phase A low Encoder power output Counter 4 Phase B low Encoder power output Co
40. ons Caution Ensure that the signals are connected such that there is no potential between PC ground and signal ground 27 USB QUADOS User s Guide Functional Details Mechanical Drawings 000000000000000000 00000000000000000 ols Figure 24 USB QUADOS circuit board top and enclosure dimensions 28 Specifications Chapter 4 specifications are subject to change without notice Typical for 25 unless otherwise specified Specifications in italic text are guaranteed by design Counter Table 1 Counter specifications Parameter Specification Counter type FPGA Counters 8 quadrature or normal Counter input modes Quadrature x1 x2 x4 Totalize Pulse width Period Mode options Non Recycle Range Limit Clear on Read Modulo N Up Down Decrement Index options Latch ClearlReload Decrement Gate mode dependent Resolution 16 32 or 48 bit counters Quadrature mode input frequency 10 5 2 5 MHz max in x1 x2 x4 Normal mode input frequency 10 MHz max De bounce times 16 steps from 500 ns to 25 ms positive or negative edge sensitive glitch detect mode or de bounce mode software selectable Time base and accuracy 48 MHz Q4 MHz 30 ppm with a 2xDLL delay locked loop Counter read pacer Internal or external scan pacer up to 8 MHz Period pulse width resolution 20 83 ns 208 3 ns 2 083 us or 20
41. r 5 Phase high 5 2 Om 4 Floating Floating 5PHB O gt lt i 4PHB Counter 4 Phase high Counter 5 Index high SINDX S g 06 o ibo edet Floating 5INDX P ounter ase A hig Ground GND O Q Encoder power output 22 04 ncoder power output m j roun Encod ENC GND Ground Counter 3 Phase A high 3PHA O 2INDX Floating Floating 3PHA O Q 2INDX Counter 2 Index high Counter 3 Phase B high 3PHB O 2PHB Floating Floating 3PHB O LJ Q 2PHB Counter 2 Phase B high comer tieng Q 2PHA Counter 2 Phase A high oating ounter ase A hig Ground GND O A Q ENC Encoder power output Encoder power output ENC lt Q Ground Counter 1 Pnasen mgn brio S OINDX Floating Counter 1 Phase B hi h 1PHB S MI re Po vanno ains 8 OPHB Floating 7 ahs 8 OPHB Counter 0 Phase B high u a s IND OPHA Floating Qaung 1 Q OPHA Counter 0 Phase A high Ground GND Q ENC Encoder power output Figure 4 Single ended mode pinout Notes When operating in quadrature counter mode the ENC output terminals are used to power encoders The external supply input to IN is passed to all of the ENC outputs When operating in normal counter mode the ENC IN and ENC terminals provide no function Terminals DIO6 and 0107 can also function as Timer Output 0 and Timer Output 1 respectively The CLMP terminal is u
42. r Output 0 Note 4 DIO7 can also function as Timer Output 1 Note 5 CEMF protection to the DIO supply it is not a source 33 USB QUADO06S User s Guide Specifications Table 12 Single ended mode pinout Signal name Terminal description Signal name Terminal description ENC Encoder power output Note 6 GND Ground OPHA Counter 0 Phase 1INDX Floating Note 7 Floating Note 7 1INDX Counter 1 Phase A OPHB Counter 0 Phase 1 Floating Note 7 Floating Note 7 1PHB Counter 1 Phase B OINDX Counter 0 Index 1 Floating Note 7 OINDX Floating Note 7 1PHA Counter 1 Index GND Ground ENC Encoder power output Note 6 ENC Encoder power output Note 6 GND Ground 2PHA Counter 2 Phase A 3INDX Floating Note 7 2PHA Floating Note 7 3INDX Counter 3 Phase A 2PHB Counter 2 Phase B Floating Note 7 2PHB Floating Note 7 Counter 3 Phase B 2INDX Counter 2 Index Floating Note 7 2INDX Floating Note 7 3PHA Counter 3 Index GND Ground ENC Encoder power output Note 6 ENC Encoder power output Note 6 GND Ground 4PHA Counter 4 Phase A 5INDX Floating Note 7 4PHA Floating Note 7 SINDX Counter 5 Phase A 4PHB Counter 4 Phase B 5PHB Floating Note 7 4PHB Floating Note 7 5PHB Counter 5 Pha
43. r is used to make the input rising edge or falling edge sensitive Inverter Bypass Debounce Bypass Trigger Before Stable Screw terminals 37 pin connector To Counters Buffer Inverter Figure 17 Debounce block diagram Edge selection is available with or without debounce In this case the debounce time setting is ignored and the input signal goes straight from the inverter or inverter bypass to the counter module The two debounce modes are trigger after stable and trigger before stable In either mode the selected debounce time determines how fast the signal can change and still be recognized Trigger after stable mode In the trigger after stable mode the output of the debounce module does not change state until a period of stability has been achieved This means that the input has an edge and then must be stable for a period of time equal to the debounce time Refer to Figure 18 Input Figure 18 Trigger after stable mode T1 through T5 indicate time periods In trigger after stable mode the input signal to the debounce module is required to have a period of stability after an incoming edge in order for that edge to be accepted passed through to the counter module For this example the debounce time is equal to T2 and T5 In Figure 18 the input signal goes high at the beginning of time period but never stays high for a period of time equal to the debounce time setting eq
44. ransitions after a required period of stability Trigger after stable mode is used with electro mechanical devices like encoders and mechanical switches to reject switch bounce and disturbances due to a vibrating encoder that is not otherwise moving 24 USB QUADO0S User s Guide Functional Details The debounce time should be set short enough to accept the desired input pulse but longer than the period of the undesired disturbance as shown in Figure 22 Debounce Time Trigger Before Stable Trigger After Stable Figure 22 Optimal debounce time for trigger after stable mode Digital I O You can connect up to eight digital IO lines to the DIOO to DIO7 screw terminals Each digital bit can be independently configured as a digital input a digital output or as a terminal count output for the corresponding counter channel In addition DIO6 and DIO7 can be configured as timer outputs with variable pulse width When a digital channel is configured for terminal count or timer output it cannot be used for DIO functions Digital input Digital bits configured for input can accept high voltage inputs up to 42 4 V or 50 VDC The digital inputs are pulled high at power up with a 10 kQ series resistor to 5V with diode protection This allows higher voltage inputs from the sourcing current to the USB QUADOS Digital input bits are read asynchronously Digital output Digital bits configured for output are open collector
45. restore communication and the LED should turn on Signal connections The USB QUADOS has 10 screw terminals and two 37 pin connectors The table below lists the board connectors applicable cables and accessory products compatible with the USB QUADOS Board connectors cables and accessory equipment Connectors cables and accessories Description Connector type 10 banks of detachable screw terminals Two 37 pin D type connectors J12 external and J50 internal Compatible cables with the 37 pin C37F AX9F 1M connectors C37FF x C37FFS x Compatible accessory products CIO MINI37 with the C37FF x cable or C37FFs x cable SCB 37 CIO MINI37 DST CIO MINI37 VERT CIO MINI37 VERTDST CIO TERMINAL Wire gauge range for screw terminals 16 AWG to 28 AWG Caution Be sure to correctly phase the encoder according to the manufacturer instructions USB QUADOS User s Guide Installing the USB QUADOS Screw terminal pinout Pin assignments for differential mode are shown in Figure 3 DIO channel 7 0107 DIO6 DIO Channel 6 DIO channel 5 DIO5 Q DIO4 DIO Channel 4 DIO channel 3 DIO3 O Q 0102 DIO Channel 2 DIO channel 1 DIO1 O 0100 DIO Channel 0 Ground GND Q GND Ground Encoder power input ENC IN O Q XPCR External pacer input protection for DIO CLMP O Q XTRIG External trigger input Power output 5V O 5V Power output Encoder power output ENC O Q GND Ground Coun
46. se B 4INDX Counter 4 Index 5PHA Floating Note 7 4INDX Floating Note 7 5PHA Counter 5 Index GND Ground ENC Encoder power output Note 6 ENC Encoder power output Note 6 GND Ground 6PHA Counter 6 Phase A 7INDX Floating Note 7 6PHA Floating Note 7 7INDX Counter 7 Phase A 6PHB Counter 6 Phase B 7PHB Floating Note 7 6PHB Floating Note 7 7PHB Counter 7 Phase B 6INDX Counter 6 Index 7PHA Floating Note 7 6INDX Floating Note 7 7PHA Counter 7 Index low GND Ground ENC Encoder power output Note 6 5V Power output 5V Power output XTRIG External trigger input CLMP protection for DIO Note 10 XPCR External pacer input ENC IN Encoder power input Note 6 GND Ground GND Ground DIOO DIO channel 0 DIO1 DIO channel 1 DIO2 DIO channel 2 DIO3 DIO channel 3 DIO4 DIO channel 4 DIO5 DIO channel 5 DIO6 DIO channel 6 Note 8 DIO7 DIO channel 7 Note 9 Note 6 External supply when operating in encoder mode ENC IN is passed to all ENC lines with optional protection diodes to prevent reverse connection Note 7 In single ended mode the PhaseA PhaseB and Index gt inputs at the user connector are left floating The inputs of the differential receiver are routed to 3 V reference Note 8 DIO6 can also function as Timer Output 0 Note 9 DIO7 can also function as Timer Output 1 Note 10 protection to the DIO supply it is not a source USB QUADOS User s Guide Spe
47. sed to protect the digital outputs from counter electro motive force Refer to page 26 for more information about CEMF 11 USB QUADO0S User s Guide Installing the USB QUADOS 37 pin connector pinout J12 and J50 The USB QUADOS has two 37 pin connectors One connector J12 is on the device right panel and the other connector J50 is internal to the device Pin assignments for differential mode are shown in Figure 5 Caution Be sure to correctly phase the encoder according to the manufacturer s instructions Counter 0 Phase A high Counter 0 Phase B high Ground Counter 0 Index high Counter 2 Index low Counter 2 Phase A high Counter 2 Phase B high Ground Counter 2 Index high Counter 3 Index low Counter 3 Phase A high Counter 3 Phase B high Ground Counter 3 Index high Counter 1 Phase A high Counter 1 Phase B high Ground Counter 1 Index high OPHB GND OINDX 2INDX 2PHA 2PHB GND 2INDX 3INDX 3PHA 3PHB GND 3INDX 1PHA 1PHB GND 1INDX OINDX 2PHA 2 1PHA 1PHB ENC 1INDX oo ooc ogw O 10 11 12 13 14 15 16 17 18 19 O J12 Counter 0 Phase A low Encoder power output Counter 0 Phase B low Encoder power output Counter 0 Index low No connection Counter 2 Phase A low Encoder power output Counter 2 Phase B low Encoder power output
48. tch counter values for read back Trigger and pacer inputs Internal software External Trigger and pacer input 0 5 V to 7 0 V External pacer frequency 8 MHz max Indicator LEDs Table 5 LED specifications Parameter Specification Power LED Indicates that the device s microcontroller has power and is running Status LED Indicates that the USB is configured blinks to indicate USB traffic Channel LEDs Indicates that the encoder counter is receiving a valid signal on any of the inputs 30 USB QUADO0S User s Guide Specifications Power Table 6 Power specifications Parameter Condition Specification Vusp 5V Note 1 Connected to self powered hub 4 5 V to 5 25 V Connected to externally powered root port hub 480 mA max 225 mA typ 5V current 4 5 to 5 25 V 20 mA max Encoder supply External supply of 1 5 A 5 VDC fused up to 42 4 50 2 Protection diodes 30BQ060 0 5V max drop protecting against reverse polarity Encoder supply fuse 0452002 Littelfuse 2A NANO2 Slo Blo Subminiature Surface Mount Fuse 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 USB host Controller The USB port s on your PC are root port hubs All externally powered root port hubs desktop PC
49. ter 7 Phase Ahigh 7PHA O 6INDX Counter 6 Index low Counter 7 Phase 7 S 6INDX Counter 6 Index high Counter 7 Phase Bhigh 7 6PHB Counter 6 Phase B low Counter 7 Phase 7 S 6PHB Counter 6 Phase B high Counter 7 Index high 7INDX O 6PHA Counter 6 Phase A low Counter 7 Indexlow 7 S 6PHA Counter 6 Phase high Ground GND IS Q Encoder power output Encoder power output O c Q GND Ground Counter 5 Phase A high 5PHA O 7 Q 4INDX Counter 4 Index low Counter 5 Phase A low 5PHA O Q 4INDX Counter 4 Index high Counter 5 Phase B high 5PHB O LI 5 4 Counter 4 Phase low Counter 5 Phase low 5PHB O gt Q 4 Counter 4 Phase B high Counter 5 Index high 5SINDX O g Q 4PHA Counter 4 Phase A low Counter5Indexlow 5INDX S O eo 4PHA Counter 4 Phase A high Ground GND ENC Encoder power output Encoder power output ENC O Q GND Ground Counter 3 Phase A high 3PHA S Q 2INDX Counter 2 Index low Counter 3 Phase A low 3PHA O z Q 2INDX Counter 2 Index high Counter 3 Phase B high 3PHB S Q 2 Counter 2 Phase low Counter 3 Phase B low 3PHB O Q 2PHB Counter 2 Phase B high Counter 3 Index high 3INDX O Q 2PHA Counter 2 Phase A low Counter 3 Index low 3INDX O Q 2PHA Counter 2 Phase A high Ground GND O Q Encoder power output Encoder power output GND
50. ting Use the ACC 202 DIN rail kit used for mounting a USB QUADOS to a standard DIN rail Use the thread forming screws to attach the DIN rail clip to your device Figure 11 ACC 202 DIN rail kit Details on this product are available on our web site at www mccdaq com daq accessory acc 202 aspx 14 USB QUADOS User s Guide Installing the USB QUADOS Connecting the USB QUADOSG to an encoder Up to eight encoders can be connected to the screw terminals nPHA nPHB and nINDX where is the number of the encoder 0 to 7 on the screw terminal Up to four encoders can be connected to each 37 pin connector external J12 and internal J50 Encoder inputs are configurable in differential or single ended mode Each A and B signal can be made as a single ended connection with respect to the 12V to common ground GND To connect the USB QUADOS to an encoder make the following connections Connect encoder signals A B and Z to the A B and Index pins on the screw terminal or 37 pin connector Connect the encoder ground to a ground GND terminal Connect the encoder power supply input to an screw terminal To power the encoders the USB QUADOS passes an external supply of up to 50 VDC current rated 1 5 A 5 VDC through the IN encoder power input terminal to the encoder power output terminals Diodes protect against reverse polarity Connect the supply return to a ground GND terminal Caution E
51. ting Note 12 24 6INDX Floating Note 12 6 NC No connection 25 6PHA Counter 6 Phase A 7 6 Floating Note 12 26 6 Counter 6 Phase B 8 Encoder power output 27 GND Ground 9 6PHB Floating Note 12 28 6INDX Counter 6 Index 10 ENC Encoder power output 29 7INDX Floating Note 12 11 7PHA Floating Note 12 30 7PHA Counter 7 Phase A 12 ENC Encoder power output 31 7PHB Counter 7 Phase B 13 7PHB Floating Note 12 32 GND Ground 14 Encoder power output 33 7INDX Counter 7 Index 15 5 Floating Note 12 34 5 Counter 5 Phase 16 ENC Encoder power output 35 5PHB Counter 5 Phase B 17 5PHB Floating Note 12 36 GND Ground 18 ENC Encoder power output 37 5INDX Counter 5 Index 19 5INDX Floating Note 12 Note 12 In single ended mode the PhaseA PhaseB and Index inputs at the user connector are left floating The inputs of the differential receiver are routed to 3 V reference 36 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 QUAD08 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
52. ual to T2 for this example 22 USB QUADO0S User s Guide Functional Details 2 At the end of time period T2 the input signal has transitioned high and stayed there for the required amount of time therefore the output transitions high If the input signal does not stabilize in the high state long enough no transition would have appeared on the output and the entire disturbance on the input would have been rejected T3 During time period T3 the input signal remained steady No change in output is seen 74 During time period T4 the input signal has more disturbances and does not stabilize in any state long enough No change in the output is seen T5 Atthe end of time period 5 the input signal has transitioned low and stayed there for the required amount of time therefore the output goes low Trigger before stable mode In the trigger before stable mode the output of the debounce module immediately changes state but will not change state again until a period of stability has passed For this reason the mode can be used to detect glitches Refer to Figure 19 Input UUU UUU Output T1 T2 T3 Ta 5 T6 Figure 19 Trigger Before Stable mode T1 through T5 in Figure 19 indicate time periods T The input signal is low for the debounce time equal to T1 therefore when the input edge arrives at the end of time period T1 it is accepted and the output of the debounce module goes
53. unter 4 Index low No connection Counter 6 Phase A low Encoder power output Counter 6 Phase B low Encoder power output Counter 7 Phase A low Encoder power output Counter 7 Phase B low Encoder power output Counter 5 Phase A low Encoder power output Counter 5 Phase B low Encoder power output Counter 5 Index low Floating Encoder power output Floating Encoder power output Floating No connection Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating Encoder power output Floating 12 USB QUADOS User s Guide Installing the USB QUADOS Cables C37F 4X9F 1M cable to 37 pin connector pinout Connections between the 37 pin connectors J12 and J50 to the C37F 4X9F 1M cable are shown in Figure 8 To power the encoders the USB QUADOS passes an external supply from the ENC IN power input terminal to connected power output screw terminals Figure 7 C37F 4X9F 1M cable P1 J12 450 1 4PHA zx 2 OPHB 4PHB 4 5 OINDX Index 4 6 4PHA M 7 OPHB 4 8 Ground Ground 9 OINDX 4INDX 1 54 1 1PHA 5PHA 2 ENC ENC 3 1PHB 5PHB 2 4 ENC ENC 5 1INDX 5INDX 6 1 5PHA t 7 1PHB SPHB lt S 8 Ground Ground 3 9 1IND
54. us reads When scanning is initiated the counters are reset to 0 and disarmed until the scan begins This has the following affects on the terminal count outputs The terminal count output timing is affected by the reset when scanning is initiated When using an external trigger to initiate the synchronous acquisition the counter is disarmed on all channels included in the scan until the trigger occurs Reloading the MAXLIMIT register interrupts the TC outputs 21 USB QUADOS User s Guide Functional Details Asynchronous scanning When read asynchronously counters can be configured so that they get set to O after each read count up or down repeatedly or count until the 16 32 48 bit or user set limit has been reached Refer to the counter mode descriptions below Debounce mode The USB QUADOS has debounce circuitry which eliminates switch induced transients that are typically associated with electro mechanical devices including relays proximity switches and encoders debounce options are software selectable You can select a debounce time debounce mode and rising edge or falling edge sensitivity Each channel can be debounced with 16 programmable debounce times in the range of 500 ns to 25 5 ms Two debounce modes trigger after stable and trigger before stable and a debounce bypass are shown in Figure 17 The signal from the buffer can be inverted before it enters the debounce circuitry The inverte
55. you may damage the USB QUADOS and possibly the computer The maximum total output current that can be drawn from all USB QUADOS connections power analog and digital outputs is 480 mA This maximum applies to most personal computers and self powered USB hubs Bus powered hubs and notebook computers may limit the maximum available output current to 100 mA The total current requirements of the USB QUADOS is 225 mA typical The maximum available excess current is the difference between the allowed current draw of the computer platform and the total output current requirement of the device For an application running on a computer or powered hub the maximum available excess current at the 5V screw terminals is calculated as follows Maximum excess current 480 mA 225 mA 255 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 Encoder power When operating in Quadrature counter mode the USB QUADOS passes an external supply of up to 50 VDC current rated 1 5 A 5 VDC through the IN encoder input power terminal to the ENC encoder power output terminals Each terminal provides power to one encoder When operating in normal counter mode the IN and terminals provide no function Ground The ground GND connections provide a common ground for the digital counter and power connecti
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