USB-7204 User's Guide
Contents
1. Element Channel Range 0 CHO BIP10V 1 CHO BIP5V 2 CH7 BIP10V 3 CH2 BIPIV When a scan begins with the gain queue enabled the USB 7204 reads the first element sets the appropriate channel number and range and then acquires a sample The properties of the next element are then retrieved and another sample is acquired This sequence continues until all elements in the gain queue have been selected When the end of the channel list is detected the sequence returns to the first element in the list This sequence repeats until the specified number of samples is gathered You must carefully match the gain to the expected voltage range on the associated channel otherwise an over range condition can occur Although this condition does not damage the USB 7204 it does produce a useless full scale reading It can also introduce a long recovery time from saturation which can affect the next measurement in the queue Synchronized operations You can connect the SYNC pin of two USB 7204 devices together in a master slave configuration and acquire data from the analog inputs of both devices using one clock When the SYNC pin is configured as an output the internal A D pacer clock is sent to the screw terminal You can use this signal as a clock input to a second USB 7204 by connecting it to the SYNC pin and Trig SYNC connector of the second device 19 USB 7204 User s Guide Functional Details Mechanical drawing2. USB 7204 User s Guide Introducing the USB 7204 USB 7204 block diagram USB 7204 functions are illustrated in the block diagram shown here Port 0 Port 1 GND Vsus GND Vaus JP2 JP1 LO HI LO HI G 1 2 4 5 8 10 16 20 DIO Analog Input 6 Port 0 Y 6 8 bits 8 single ended 3 2 11 bit channels 3 Port1 a 9 A RN 4 differential 3 2 e USB 12 bit channels gt T Microcontroller O E CTR o 2 2 z 5 D SYNC Analog Output 2 3 8 2 channels TRIG_IN 12 bit S P7 f 2 Full speed Trigger SYNC USB 2 0 connector Compliant Interface USB connector OEM USB connector Figure 1 USB 7204 functional block diagram Chapter 2 Installing the USB 7204 What comes with your shipment The following items are shipped with the USB 7204 Hardware USB 7204 USB cable Optional hardware OEM connector cable Documentation MCC DAQ Quick Start Guide The Quick Start Guide booklet provides an overview of the MCC DAQ software you received with the device and includes information about installing the software Please read this booklet completely before installing any software or hardware Insert The operating systems that are supported by the device are listed on the insert and includes the internet location where you can download DAQFlex software and the locations where you can learn more about DAQFlex software and MCC DAQ software Unpacking the USB 7204 As with any
3. TRIG_IN Bit 3 Lop Sits No j al Port 1 Bit 3 HI iio i AGND Bit 1 S S 13 D AOUTO l Bit 0 8 8 AGND GND CH7IN 1 CH3 IN LO 5V on CH6IN CH3IN HI GND AGND Bit 7 O CH4IN iCH2INLO Bit 6 CH3IN CH2INHI Bit 5 3 gt AGND 1 Bit 4 CH3IN CH1INLO Porto Bits tog JF2 CH2IN CH1 INHI i O sa 8 Port 0 Bit 2 AGND Bit 1 CH1IN ICHO IN LO Bit 0 CHOIN CHOIN HI SE Differential OEM USB Power connector connector Status LEDs Figure 4 Screw terminal pinout Signal connections Analog input You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 CHO IN through CH7 IN Refer to Figure 4 above for the location of the analog input pins You can configure the analog input channels as eight single ended channels or four differential channels By default differential mode is configured at power up Single ended configuration When configured for single ended mode each analog input has 11 bit resolution due to restrictions imposed by the A D converter With single ended mode the input signal is referenced to signal ground and delivered through two wires The wire carrying the signal to be measured connects to CHF IN The second wire connects to AGND The input range for single ended mode is 10 V Single ended measurements using differential channels To perform a SE measurement using differential channels connect the sign
4. 0 Samples 1000 Rate 1000 Trigger Disabled Status Idle AOutScan CTR Value 0 Environmental Table 20 Environmental specifications Parameter Specification Operating temperature range 0 C to 70 C Storage temperature range 40 C to 70 C Humidity 0 to 90 non condensing Mechanical Table 21 Mechanical specifications Parameter Specification Dimensions L x W x H 90 17 x 95 25 x 12 70 mm 3 55 x 3 75 x 0 5 in 111 76 mm 4 40 in length with detachable screw terminals connected USB cable length 3 m 9 84 ft max User connection length 3 m 9 84 ft max Screw terminal connector and pinout Table 22 Connector specifications Parameter Specification Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG 27 USB 7204 User s Guide Specifications Table 23 Differential mode pinout Pin Signal Name Pin Signal Name 1 CHO IN HI 21 Port 0 Bit O 2 CHO IN LO 22 Port 0 Bit 1 3 AGND 23 Port 0 Bit 2 4 CH1 IN HI 24 Port 0 Bit 3 5 CH1 IN LO 25 Port 0 Bit 4 6 AGND 26 Port 0 Bit 5 7 CH2 IN HI 27 Port 0 Bit 6 8 CH2 IN LO 28 Port 0 Bit 7 9 AGND 29 GND 10 CH3 IN HI 30 5Vuser 11 CH3 IN LO 31 GND 12 AGND 32 Port 1 Bit O 13 D
5. 2 resistors or provide solder bridges to close the gaps Trigger Sync connector The Trigger Sync connector provides two signals SYNC and TRIG_IN These signals are also available on the screw terminal see page 16 for details about these signals Trigger Sync connector pinout Pin Signal Name Pin Signal Name 1 TRIG_IN 2 GND 3 N C 4 GND 5 SYNC 6 GND 7 N C 8 GND 9 N C 10 N CD Use a 0 1 box header when making connections to the Trigger Sync connector The Trigger Sync connector internally connects its SYNC and TRIG_IN pins to the screw terminal via jumpers P6 and P7 1 5k Microcontroller SYNC Microcontroller TRIG_IN TRIG_IN Trigger Sync P7 Screw connector terminal Figure 3 Jumper P6 and P7 schematic 11 USB 7204 User s Guide Functional Details Sync jumper P6 The Sync jumper internally connects the SYNC pin on the Trigger Sync connector to the SYNC pin on the screw terminal Remove this jumper on boards that will not send receive the SYNC signal through the SYNC TRIG connector Refer to Figure 2 on page 10 for the location of this jumper Trigger jumper P7 The Trigger jumper internally connects the TRIG_IN pin on the Trigger Sync connector to the TRIG_IN pin on the screw terminal Remove this jumper on boards that will not send receive the TRIG signal through the SYNC TRIG connector Refer to Refer to Figure 2 on page 10 for the location of t
6. Table 16 Microcontroller specifications Parameter Specification Type High performance 8 bit RISC microcontroller Program Memory 32 768 words Data Memory 3 936 bytes Indicator LEDs Table 17 Indicator LED specifications Parameter Specification Power LED top Indicates that the device s microcontroller has power and is configured Status LED Blinks to indicate USB communications OEM power OEM Connector LED sink current up to 5 mA per LED 5 V max 25 USB 7204 User s Guide Specifications Power Table 18 Power specifications Parameter Conditions Specification Supply current Note 10 80 mA 5 V user power available Connected to self powered hub 4 0 V min 5 25 V max Note 11 Connected to externally powered root port hub Connected to bus powered hub 4 0 V min 5 25 V max Output current Note 12 Connected to self powered hub 420 mA max Connected to externally powered root port hub Connected to bus powered hub 20 mA max Fuse F1 F4 spare 0452 500 Littelfuse 0 5A NANO Slo Blo Subminiature Surface Mount Fuse Fuse F2 F3 spare 0452 375 Littelfuse 0 375A NANO Slo Blo Subminiature Surface Mount Fuse Note 10 This is the total current requirement for the USB 7204 which includes up to 10 mA for the status LED Note 11 Self powered hub refers to a USB hub with an external power supply Self powered hubs
7. 0 bit 0 through bit 7 Port 1 bit Othrough bit 7 Configuration 2 banks of 8 Pull up pull down configuration All pins configurable via jumpers JP1 and JP2 to Vs or Ground via 47 k resistors JP1 configures Port 1 and JP2 configures Port 0 Input high voltage 2 0 V min 5 5 V absolute max Input low voltage 0 8 V max 0 5 V absolute min Output high voltage 3 8 V min OH 2 5 mA Output low voltage 0 7 V max IOL 2 5 mA Power on and reset state Input External trigger Table 12 Digital trigger specifications Parameter Conditions Specification Trigger source Note 7 External digital TRIG_IN Trigger mode Software selectable Edge sensitive user configurable for CMOS compatible rising or falling edge Trigger latency 10 us max Trigger pulse width 1 us min Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Input leakage current 1 0 HA Note 7 TRIG_IN is a Schmitt trigger input protected with a 1 5 kQ series resistor External clock input output Table 13 External clock I O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Software selectable direction Output default Outputs internal A D pacer clock Input Receives A D pacer clock from external source Input clock rate 50 KHz max Clock pulse width Input mode
8. A OUT 0 33 Port 1 Bit 1 14 D A OUT 1 34 Port 1 Bit 2 15 AGND 35 Port 1 Bit 3 16 N C no connect 36 Port 1 Bit 4 17 GND 37 Port 1 Bit 5 18 TRIG_IN 38 Port 1 Bit 6 19 SYNC 39 Port 1 Bit 7 20 CTR 40 GND Table 24 Single ended mode pinout Pin Signal Name Pin Signal Name 1 CHO IN 21 Port 0 Bit O 2 CH1 IN 22 Port 0 Bit 1 3 AGND 23 Port 0 Bit 2 4 CH2 IN 24 Port 0 Bit 3 5 CH3 IN 25 Port 0 Bit 4 6 AGND 26 Port 0 Bit 5 7 CH4 IN 27 Port 0 Bit 6 8 CH5 IN 28 Port 0 Bit 7 9 AGND 29 GND 10 CH6 IN 30 5Vuser 11 CH7 IN 31 GND 12 AGND 32 Port 1 Bit O 13 D A OUT 0 33 Port 1 Bit 1 14 D A OUT 1 34 Port 1 Bit 2 15 AGND 35 Port 1 Bit 3 16 N C no connect 36 Port 1 Bit 4 17 GND 37 Port 1 Bit 5 18 TRIG_IN 38 Port 1 Bit 6 19 SYNC 39 Port 1 Bit 7 20 CTR 40 GND 28 USB 7204 User s Guide Specifications Trigger Sync connector ES Pin GND for F1 O 20 Bit 7 19 Bit 6 18 Bit 5 o 17 Bit 4 O 16 Rott Bits 15 Bit 2 14 Bit 1 O 113 Bit 0 O 12 GND O O 11 EV iir O 10 GND O 9 Bit 7 O 8 Bit 6 7 Bit 5 S 6 Porto Bit4 Loja JP2 9 a Port 0 Bit 2 3 Bit 1 8 2 Bit 0 1 OEM USB Power connector connector Status LEDs OEM connector and pinout P4 Table 25 OEM connector specifications 1 CH3 IN LO CH3 IN HI AGND CH2 IN LO CH2 IN HI AGND CH1 IN LO CH1 IN HI AGND CHO IN LO CHO IN HI Differential Parameter
9. E ARE EEEE iii 24 Ext rnal irigp r rs time inst nent ii 24 External clock input oUt pOr std cartoons 24 COM a es ed Bn e nl e de A ee 25 USB 7204 User s Guide Non volatile A eg sige sienne mienne tn terne tnt tentent 25 Microcontrollers sires Rs ann nn ri nn Reel td Te needs 25 Indicator LEDS kemin a nn tt stead en AU nr nn AT nt tent nt senior 25 POWER rene since vecocnu sess tuessteguncevigecend dec nd ni ee ee Re a dde ddr a ht A rene 26 Generali A R RAA ARR TR Ce Re ann ANR AT Rte 27 Environmental smilies mien Ines Rene ie et er toes ios 27 Mechanical niai nantes animent te 27 Screw terminal connector and pinout 00 0 eee eeceeeceseceecesecaecsaecaeecaeecsaseaeeeaeseeeeeseseesecsaecsaecsaecsaecsaeeaeeenes 27 OEM connector and pinout P4 ec cveisis 80 sms ovis hace aa E EERE a EN E E e ae EIEE ait 29 Trigger Sync connector and pinout PS iii 29 Declaration f Condo MY een aa pe ae e nn ane fA eaae aaa Enada a aaea en Gun 30 Preface About this User s Guide This document describes the Measurement Computing USB 7204 data acquisition device and lists device specifications Conventions For more information Text presented in a box signifies additional information related to the subject matter 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 scre
10. Measurement Computing Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems 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 7204 Table of Contents Preface About this User s Guide ondas 5 CONVENTIONS ON NN 5 Were to find more IMformatlon zen mn nt nm en nn te ner dd isis 5 Chapter 1 Introducing th USB 720M4 nee cues cctersnntzecoecechceedssizeaeeesentctesstz cyacesceuteeezanes 6 USB 7204 block Marita ii EE TEETE ete 7 Chapter 2 Installing the USB 7204 2558525 scchegsencedacegdcahaeceacestecies ahitssacecececteudeccasdestecdecuteccescudeeaanenubecnactae 8 What com
11. selectable Throughput Note 2 Software paced 250 samples per second S s typ system dependent Scan to system memory 0 596 to 50 000 S s Channel gain queue Up to 16 elements Software selectable channel range Resolution Note 3 Differential 12 bits no missing codes Single ended 11 bits Integral linearity error least significant bit LSB typ Differential linearity error 0 5 LSB typ Repeatability 1 LSB typ Trigger source Software selectable External digital TRIG_IN Pacer source Software selectable m Internal External SYNC rising edge triggered m External Gated SYNC see Note 4 Programmed IO Calibration Factory Cal factors stored in firmware Cal factors must be applied via application software 21 USB 7204 User s Guide Specifications Note 1 Input current is a function of applied voltage on the analog input channels For a given input Note 2 Note 3 Note 4 voltage Vin the input leakage is approximately equal to 8 181 V 12 HA Maximum throughput scanning to computer memory is machine dependent The rates specified are for Windows XP only The AD7870 converter only returns 1 1 bits 0 2047 codes in single ended mode and 12 bits in differential mode Firmware versions prior to 2 04 have LSB justified data Firmware versions from 2 04 on have MSB justified data External Gated Sync holds off the first clock pulse after
12. setting up a scan to ensure adequate setup time for the first conversion Table 2 Accuracy differential mode Range Accuracy LSB 20 V 5 1 10 V 6 1 5 V 8 1 4 V 9 1 2 5 V 12 1 2 V 14 1 1 25 V 20 1 1 V 24 1 Table 3 Accuracy single ended mode Range Accuracy LSB 10 V 4 0 Table 4 Accuracy components differential mode All values are Range of Reading Gain Error at full scale FS Offset mV Accuracy at FS mV millivolts mV 20 V 0 2 40 9 766 49 766 10 V 0 2 20 9 766 29 766 5 V 0 2 10 9 766 19 766 4 V 0 2 8 9 766 17 766 2 5 V 0 2 5 9 766 14 766 2 V 0 2 4 9 766 13 766 1 25 V 0 2 2 5 9 766 12 266 1 V 0 2 2 9 766 11 766 Table 5 Accuracy components single ended mode All values are Range of Reading Gain Error at FS mV Offset mV Accuracy at FS mV 10 V 0 2 20 19 531 39 531 22 USB 7204 User s Guide Specifications Table 6 Noise performance differential mode Range Typical counts Least significant bitroot mean square LSBrms 20 V 2 0 30 10 V 2 0 30 5 V 3 0 45 4 V 3 0 45 2 5 V 4 0 61 2 V 5 0 76 1 25 V 7 1 06 1 V 8 1 21 Table 7 Noise performance single ended mode Range Typical LSBrms Counts 10 V 2 0 30 Analog output Table 8 Analog output specifications Parameter Conditions Spe
13. 1 us min Output mode 5 us min Input leakage current Input mode 1 0 uA Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Output high voltage Note 8 IOH 2 5 mA 3 3 V min No load 3 8 V min Output low voltage Note 8 IOL 2 5 mA 1 1 V max No load 0 6 V max Note 8 SYNC is a Schmitt trigger input and is over current protected with a 1 5 kQ series resistor USB 7204 User s Guide Specifications Counter Table 14 Counter specifications Parameter Specification Pin name Note 9 CTR Counter type Event counter Number of channels 1 Input type TTL rising edge triggered Input source CTR screw terminal Resolution 32 bits Schmidt trigger hysteresis 20 mV to 100 mV Input leakage current uA Input frequency 1 MHz max High pulse width 500 ns min Low pulse width 500 ns min Input high voltage 4 0 V min 5 5 V absolute max Input low voltage 1 0 V max 0 5 V absolute min Note 9 CTR is a Schmitt trigger input protected with a 1 5K Q series resistor Non volatile memory Table 15 Non volatile memory specifications Parameter Specification EEPROM 1 024 bytes EEPROM Configuration Address Range Access Description 0x000 0x1FF Reserved 512 bytes system and cal data 0x200 0x3FF Read write 512 bytes user area Microcontroller
14. So co S S ite Lo o N o te ey w 3 550 90 17 3 350 85 09 2 987 75 86 3 200 81 28 2 300 58 42 1 775 45 09 1 537 39 04 985 25 02 564 1431 300 762 200 5 08 000 0 o co a wo a S oN 000 3 575 90 81 3 775 95 89 Figure 13 Circuit board dimension 20 Chapter 4 Specifications All specifications are subject to change without notice Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input Table 1 Analog input specifications Parameter Conditions Specification A D converter type Successive approximation type Input modes Single ended or differential default Input voltage range for linear CHx to GND 10 volts V max operation single ended mode Input common mode voltage range CHx to GND 10 V min 20 V max for linear operation differential mode Absolute maximum input voltage CHx to GND 28 V max Input impedance 122 kQ Input current Note 1 Vin 10 V 70 microamperes uA typ Vin 0 V 12 pA typ Vin 10 V 94 uA typ Number of channels 8 single ended 4 differential software selectable Configuration Single A D Sampling method Multiplexed Input ranges single ended mode 10 V G 2 Input ranges differential mode 20 V G 1 10 V G 2 default 5 V G 4 4 V G 5 2 5V G 8 2 0V G 10 1 25 V G 16 1 0V G 20 Software
15. Specification Connector type 10 position 2 54 mm 0 1 in box header Table 26 OEM connector pinout Pin Signal Name Pin Signal Name 1 N C 2 Veus fuse protected 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9 N C do not connect anything to this pin 10 SHIELD Trigger Sync connector and pinout P5 Table 27 Trigger Sync connector specifications Parameter Specification Connector type 10 position 2 54 mm 0 1 in box header Table 28 Trigger Sync connector pinout Pin Signal Name Pin Signal Name 1 TRIG_IN 2 GND 3 N C 4 GND 5 SYNC 6 GND 7 N C 8 GND 9 N C 10 N C 29 CE Declaration of Conformity Manufacturer Measurement Computing Corporation Address 10 Commerce Way Suite 1008 Norton MA 02766 USA Category Electrical equipment for measurement control and laboratory use Measurement Computing Corporation declares under sole responsibility that the product USB 7204 to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EC EMC Directive 2004 108 EC General Requirements EN 61326 1 2006 IEC 61326 1 2005 Emissions EN 55011 2007 CISPR 11 2003 Radiated emissions Group 1 Class A EN 55011 2007 CISPR 11 2003 Conducted emission
16. USB 7204 12 Bit 50 kS s Multifunction DAQ Board User s Guide Document Revision 9 Va QU Fa MEASUREMENT December 2013 r A Copyright 2013 4 N vap COMPUTING Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our mission To provide data acquisition hardware and software that will save time and save money Simple installations minimize the time between setting up your system and actually making measurements We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system Limited Lifetime Warranty Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product to the original purchaser unless otherwise noted Any products found to be defective in material or workmanship will be repaired replaced with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of t
17. al to the CH IN HI input and ground the associated CH IN LO input Differential configuration When configured for differential mode each analog input has 12 bit resolution In differential mode the input signal is measured with respect to the low input and delivered through three wires The wire carrying the signal to be measured connects to CHO IN HI CH1 IN HL CH2 IN HI or CH3 IN HI The wire carrying the reference signal connects to CHO IN LO CH1 IN LO CH2 IN LO or CH3 IN LO The third wire connects to GND 13 USB 7204 User s Guide Functional Details A low noise precision programmable gain amplifier PGA is available on differential channels to provide gains of up to 20 and a dynamic range of up to 12 bits Differential mode input voltage ranges are 20 V 10 V 5 V 4 V 2 5 V 2 0 V 1 25 V and 1 0 V In differential mode the following two requirements must be met for linear operation Any analog input must remain in the 10V to 20V range with respect to ground at all times The maximum differential voltage on any given analog input pair must remain within the selected voltage range The input common mode voltage signal of the differential channel must be in the 10 V to 20 V range in order to yield a useful result For example you input a 4 V pp sine wave to CHHI and apply the same sine wave 180 out of phase to CHLO The common mode voltage is 0 V The differential input voltage
18. allow a connected USB device to draw up to 500 mA Root port hubs reside in the computer s USB host controller The USB port s on your computer are root port hubs All externally powered root port hubs desktop computers 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 computer that is not connected to an external power adapter is an example of a battery powered root port hub Bus powered hubs receive power from a self powered or root port hub In this case the max current available from the USB 5 V is 100 mA The minimum USB 5 V voltage level can be as low as 4 1 V Protected by fuse F2 at 375 mA Note 12 This refers to the total amount of current that can be sourced from the USB 5 V analog outputs and digital outputs 26 USB 7204 User s Guide Specifications General Table 19 General specifications Parameter Specification Device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 DEFAULTS for programmable options and DEV RESET DEFAULT message Al Channel Mode Differential Range 10 V Low Channel 0 High Channel 0 Samples 1000 Rate 1000 Range 10 V Pacer Master Transfer Mode BlockIO Trigger Disabled Queue Disabled Status Idle AlnScan AlTrig Trigger Polarity Rising Rearm Disabled Low Channel 0 High Channel
19. cification Resolution 12 bits 1 in 4096 Output range 0 4 096 V 1 mV per LSB Number of channels 2 Throughput Note 5 Software paced 250 S s single channel typ system dependent Single channel continuous scan 10 kS s Dual channel continuous scan simultaneous 5 kS s update Power on and reset Initializes to 000h code voltage Output drive Each D A OUT 15 mA Slew rate 0 8V microsecond us typ Note 5 Maximum throughput scanning to computer memory is machine dependent The rates specified are for Windows XP only Maximum rates on operating systems that predate XP may be less and must be determined through testing on your machine Table 9 Analog output accuracy all values are Range Accuracy LSB 0 V to 4 096 V 4 0 typ 45 0 max Table 10 Analog output accuracy components all values are Range of FSR Gain Error at FS mV Offset mV Accuracy at FS Note 6 mV 0 V to 4 096 V 0 1 typ 0 9 max 4 0 typ 36 0 max 1 0 typ 9 0 max 4 0 typ 45 0 max Note 6 Negative offsets will result in a fixed zero scale error or dead band At the max offset of 9 mV any input code of less than 0x009 will not produce a response in the output 23 USB 7204 User s Guide Specifications Digital input output Table 11 Digital I O specifications Parameter Specification Digital type CMOS Number of I O 16 Port
20. d impedance of the pin in question Ground The analog ground AGND terminals provide a common ground for all analog channels The digital ground GND terminals provide a common ground for the digital trigger counter and sync channels and the power terminal Accuracy The overall accuracy of any instrument is limited by the error components within the system Quite often resolution is incorrectly used to quantify the performance of a measurement product While 12 bits or 1 part in 4096 does indicate what can be resolved it provides little insight into the quality of an absolute measurement Accuracy specifications describe the actual results that can be realized with a measurement device There are three types of errors which affect the accuracy of a measurement system offset gain nonlinearity The primary error sources in the USB 7204 are offset and gain Nonlinearity is small in the USB 7204 and is not significant as an error source with respect to offset and gain Figure 9 shows an ideal error free USB 7204 transfer function The typical calibrated accuracy of the USB 7204 is range dependent as explained in the Specifications chapter on page 21 We use a 10 V range here as an example of what you can expect when performing a measurement in this range The accuracy plots in Figure 9 are drawn for clarity and are not drawn to scale Input Voltage Output Code 2048 4095 FS Figure 9 Ideal ADC tran
21. e USB 7204 User s Guide Installing the USB 7204 Universal Library and InstaCal Installing in a Windows environment Refer to the Quick Start Guide that ships with your device for instructions on installing the MCC DAQ software in a Windows environment This booklet is available in PDF at www mccdag com PDFmanuals DAQ Software Quick Start pdf Running and deploying apps in an Android environment For instructions on deploying and running apps in an Android environment refer to the UL for Android Example Projects topic in the Universal Library for Android Help that installs with the UL for Android software library on the MCC DAQ CD Installing the hardware Install the software before you install your device A driver needed to run the USB 7204 is installed when you install the software Therefore you need to install the software package you plan to use before you install the hardware For operation on a Windows operating system we recommend that you run Windows Update to update your operating system with the latest USB drivers There are two ways to connect the USB 7204 to your system Connect a USB cable from the USB connector to either a USB port on the computer or to an external USB hub connected to the computer No external power is required or Use a 2 54 mm 0 1 in box header to connect with the OEM connector The connector pinout is shown below Pin Signal Name Pin S
22. electronic device you should take care while handling to avoid damage from static electricity Before removing the USB 7204 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 contact us immediately using one of the following methods Knowledgebase kb mccdaq com Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdaq com For international customers contact your local distributor Refer to the International Distributors section on our website at www mccdaq com International Installing the software Note Before installing the USB 7204 hardware you must install the software you plan to use with the device The USB 7204 is supported by DAQFlex software and Universal Library software You can install both software packages on your computer DAQFlex Install DAQFlex software when you want to develop data acquisition applications that can be deployed across multiple operating systems and custom embedded systems DAQFlex software for each supported operating system is available from the DAQFlex download page at www mccdaq com DAQFlexDL Refer to the DAQFlex Software User s Guide at www mecdag com pdfs manuals DAQFlex 20Software pdf for instructions about how to install DAQFlex softwar
23. en 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 USB 7204 hardware is available on our website at www mccdag com You can also contact Measurement Computing Corporation with specific questions Knowledgebase kb mccdaq com Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdaq com Chapter 1 Introducing the USB 7204 The USB 7204 is a USB 2 0 full speed device that is supported under the following operating systems Microsoft Windows 8 7 Vista XP 32 bit or 64 bit Android 3 1 or later Macintosh 32 bit or 64 bit Linux 32 bit or 64 bit The USB 7204 is compatible with both USB 1 1 and USB 2 0 ports The device that provides the following features Eight channels of 16 bit analog input configurable for eight 11 bit single ended inputs represented as 12 bit data even values only or four 12 bit differential inputs Two 12 bit analog outputs 16 individually configurable digital I O channels 32 bit event counter Digital trigger input Bidirectional SYNC pin for external clocking and synchronization with another board The device is powered by the 5 volt USB supply from your computer and requires no external power
24. es with your shipment ses 8 Hard Ware e ouceuane coven syaeaaey ias 8 DOCUIMEN AION eek sc teeta as 8 Unpacking the USB 7204 2 25 nent ns tn se tt nel ne core craneal ilatina sees 8 InstallinSthe SOmt ware RENE EE ARS ida 8 DAOFIEX sun le bin teo 8 Universal Library and InstaCal ss 9 Installing the hardware unies ee Ais aioe ee ahs EA oie RES eS 9 Programming and developing applications ss 9 Chapter 3 Functional Details o onnnnninnicnnnnicnnnannnnacnnanann arrancan 10 Analog input acquisition modes esse 10 COMPONE NiS insiste niet nent EE en tee et net net line entr te S EEEE USB CONNECLO ea EE EAE ATAA E ed AURA Eden sn bois ETUI An A D Ces el OEM connector Trigger S ync connector USB Connector ivan rimes nier LED indicators SCTEW TETMINALS en oes ai gs es Son cece foes ss AR sistas AE TSE et a nt os ibs dan Eten nee eee date ae Rhea ae RAS LEE TT Signal Connections ee etek il kod teh eee Mn ae ae Ne RO nt Re eh es Analog INDUC cist eter she Me ii da cotton ghee Analoroutp te EE aleve en ee Re A E a ias Digital 1 O Trigger input SYNC DO Counter input Power output CLOUD A Matai ARIE EM nee JAVEA K O AN Channel sain GuUeUen essensen ina ae tio E RESSE 19 Synchronized OPETATIONSS csi tt 19 Mechanical drawing cimil hee E A S 20 Chapter 4 Specifications e a a a a Gt Se a a a ea oa nee 21 Aalto NRA NE een nt 21 ON 23 Digital input output ei anei e
25. essage based Firmware Specification for information about the message based firmware Chapter 3 Functional Details Analog input acquisition modes The USB 7204 can acquire analog input data in software paced and continuous scan modes Software paced mode You can acquire one analog sample at a time in software paced mode You initiate the A D conversion by calling a software command The analog value is converted to digital data and returned to the computer You can repeat this procedure for each channel desired until you have the total number of samples that you want from each channel The maximum throughput sample rate in software paced mode is system dependent Continuous scan mode You can acquire data from up to eight channels simultaneously in continuous scan mode The analog data is continuously acquired and converted to digital values until you stop the scan Data is transferred in blocks of up to 32 samples from the USB 7204 to the memory buffer on your computer The maximum continuous scan rate of 50 kS s is an aggregate rate You can acquire data from one channel at 50 kS s two channels at 25 kS s and four channels at 12 5 kS s You can start a continuous scan with either a software command or with an external hardware trigger event Components The USB 7204 components are shown in Figure 2 1 Trigger Sync connector 5 Power LED top and Status LED bottom 8 OEM connector 2 Trigger jumper P7 6 USB connector 9 P
26. 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 mecdaq com legal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2013
27. his jumper 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 This connector operates in parallel with the OEM connector do not connect to both the USB connector and the OEM connector LED indicators The USB 7204 has LEDs for power and communication status See Figure 2 for the location of each LED LED type Indication Power Steady green The device s microcontroller is connected to a computer or external USB hub Status Blinking green data is being transferred over the USB bus Screw terminals The screw terminals provide the following connections Eight analog input connections CHO IN to CH7 IN Two analog output connections D A OUT 0 to D A OUT 1 One external trigger source TRIG_IN One SYNC terminal for external clocking and multi unit synchronization SYNC One external event counter connection CTR Five analog ground connections AGND One ground connection GND 16 digital I O connections Port 0 Bit 0 to Port 0 Bit 7 and Port 1 Bit 0 to Port 1 Bit 7 One output power connection 5 VusER Three ground connections GND Screw terminal connections are shown in Figure 4 12 USB 7204 User s Guide Functional Details Trigger Sync connector Spare fuse GND for F1 CTR Bit7 SYNC Bit 6
28. ignal Name 1 N C 2 VBUS 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9 N C do not connect anything to this pin 10 SHIELD When you connect the USB 7204 for the first time on a computer running Windows a Found New Hardware message opens as the device is detected The installation is complete when the message closes After the USB 7204 is installed the Power LED remains on to indicate that communication is established between the USB 7204 and your computer Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB 7204 or you may lose data and or your ability to communicate with the USB 7204 If the Power LED turns off If the Power LED is on but then turns off the computer has lost communication with the USB 7204 To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the Power LED should turn on Programming and developing applications You can program and develop applications for the USB 7204 using MCC DAQ software and DAQFlex software OEM users can create a custom driver for use with the message based firmware to interface with the device Refer to the Quick Start Guide for information about the Universal Library and InstaCal Refer to the DAQFlex Software User s Guide for information about DAQFlex software Refer to the M
29. ins 21 40 3 Sync jumper P6 7 Pull up down jumper JP2 Port 0 10 Pull up down jumper JP1 Port 1 4 Pins 1 20 Figure 2 USB 7204 components 10 USB 7204 User s Guide Functional Details 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 This connector operates in parallel with the OEM connector do not connect to both the USB connector and the OEM connector OEM connector The OEM connector operates in parallel with the USB connector do not connect to both the USB connector and the OEM connector The OEM connector is a 0 1 box header Pins 2 4 6 8 and 10 provide a USB connection as listed in the connector pinout below OEM connector pinout Pin Signal Name Pin Signal Name 1 N C 2 VBUS 3 N C 4 D 5 N C do not connect anything to this pin 6 D 7 N C do not connect anything to this pin 8 GND 9 N C do not connect anything to this pin 10 SHIELD Modifications are required in order to use the OEM connector We recommend that you return the device to the factory for this modification Should you have the capabilities to perform the modifications the following change is required to create a USB connection via the OEM connector locations R48 and R49 must be populated We recommend that you populate with 0603 size 0
30. l scale neglecting the effect of offset for the moment the measurement would be within 20 mV of the actual value Note that gain error is expressed as a ratio Values near FS are more affected from an absolute voltage standpoint than are values near mid scale which see little or no voltage error Combining these two error sources in Figure 12 we have a plot of the error band of the USB 7204 for the 10 V range This is a graphical version of the typical accuracy specification of the product The accuracy plots in Figure 12 are drawn for clarity and are not drawn to scale 18 USB 7204 User s Guide Functional Details Input Voltage Ideal 9 77 mV 20 mV deal deal 9 77 mV 20 mV Output Code Ideal 9 77 mV 20 mV gt Ideal gt Ideal 9 77 mV 20 mV Figure 12 Error band plot Channel gain queue Use the device s channel gain queue to set up a scan sequence with a unique per channel gain setting and channel sequence The queue is large enough for up to 16 channel configurations limited to either single ended or differential mode The channel gain queue feature removes the restriction of using an ascending channel sequence at a fixed gain This feature creates a channel list which is written to local memory on the USB 7204 The channel list is made up of a channel number and range setting An example of a four element list is shown in the table below Sample channel gain queue list
31. mental use over and above that required by the USB 7204 is the difference between the total current requirement of the USB based on the application and the allowed current draw of the computer platform 500 mA for desktop computers and self powered hubs or 100 mA for bus powered hubs and notebook computers It shall not exceed 375 mA based on the Slo Blo Fuse current rating connected to the 5V terminal With all outputs at their maximum output current you can calculate the total current requirement of the USB 7204 USB 5 V as follows USB 7204 80 mA 16 DIO 2 5 mA ea 2 AO 15 mA ea 150 mA For an application running on a computer or powered hub the maximum available excess current is 500 mA 150 mA 350 mA This number is the total maximum available current at the 5V lt output screw terminal Measurement Computing highly recommends that you figure in a safety factor of 20 below this 16 USB 7204 User s Guide Functional Details maximum current loading for your applications A conservative safe user maximum in this case would be in the 350 mA to 375 mA range fuse rated Since laptop computers typically allow up to 100 mA the USB 7204 in a fully loaded configuration may be above that allowed by the computer In this case you must determine the per pin loading in the application to ensure that the maximum loading criteria is met The per pin loading is calculated by simply dividing the 5 V by the loa
32. s Group 1 Class A Immunity EN 61326 1 2006 Table 3 IEC 61000 4 2 2001 Electrostatic Discharge immunity TEC 61000 4 3 2002 Radiated Electromagnetic Field immunity To maintain compliance to the standards of this declaration the following conditions must be met The host computer peripheral equipment power sources and expansion hardware must be CE compliant All I O cables must be shielded with the shields connected to ground J O cables must be less than 3 meters 9 75 feet in length The host computer or embedded system must be properly grounded Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN 61326 1 2006 or IEC 61326 1 2005 Declaration of Conformity based on tests conducted by Chomerics Test Services Woburn MA 01801 USA in August 2004 Test records are outlined in Chomerics Test Report EM13948 04 Further testing was conducted by Chomerics Test Services Woburn MA 01801 USA in December 2008 Test records are outlined in Chomerics Test report EMI5216 08 We hereby declare that the equipment specified conforms to the above Directives and Standards AU 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
33. s an output to pace the conversions on another USB 7204 When configured as an output the internal A D pacer clock is sent to the screw terminal You can use this signal as a clock input to a second USB 7204 by connecting it to the SYNC pin and Trig SYNC connector of the second device The SYNC pin is internally connected to the SYNC pin on the Trigger Sync connector see page 11 Counter input The CTR connection is a TTL level input to a 32 bit event counter Refer to Figure 4 on page 13 for the location of this pin The internal counter increments when the TTL level transitions from low to high The counter can count frequencies of up to 1 MHz Power output The 5VUSER output connection is a 5 volt output that is supplied by the host computer Caution Do not connect to an external power supply to this terminal or you may damage the USB 7204 and possibly the computer The maximum total output current that can be drawn from all USB 7204 connections power analog and digital outputs is 420 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 Just connecting the USB 7204 to your computer draws 80 mA of current from the USB 5 V supply Once you start running applications with the USB 7204 each DIO bit can draw up to 2 5 mA and each analog output can draw 15 mA The maximum amount of 5 V current available for experi
34. sfer function The USB 7204 offset error is measured at mid scale Ideally a zero volt input should produce an output code of 2048 Any deviation from this is an offset error Figure 10 shows the USB 7204 transfer function with an offset error The typical offset error specification on the 10 V range is 9 77 mV Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis 17 USB 7204 User s Guide Functional Details The accuracy plots in Figure 10 are drawn for clarity and are not drawn to scale Input Voltage Ideal Offset 9 77 mV Output Code 2048 977 mV z 4095 FS Figure 10 ADC transfer function with offset error Gain error is a change in the slope of the transfer function from the ideal and is typically expressed as a percentage of full scale Figure 11 shows the USB 7204 transfer function with gain error Gain error is easily converted to voltage by multiplying the full scale FS input by the error The accuracy plots in Figure 11 are drawn for clarity and are not drawn to scale Input Voltage y Gain error 0 2 or 20 mV Gain error 0 2 or 20 mV Actual Output Code 2048 4095 Figure 11 ADC Transfer function with gain error For example the USB 7204 exhibits a typical calibrated gain error of 0 2 on all ranges For the 10 V range this would yield 10 V x 0 002 20 mV This means that at ful
35. swings from 4 V 4 V 8 V to 4 V 4 V 8V Both inputs satisfy the 10 V to 20 V input range requirement and the differential voltage is suited for the 10 V input range see Figure 5 4V Measured Signal CHHI oy 4V 8V Differential 8V 4V CHLO 4V Figure 5 Differential voltage example common mode voltage of 0 V If you increase the common mode voltage to 11 V the differential remains at 8 V Although the common mode voltage signal on each input now has a range of 7 V to 15 V both inputs still satisfy the 10 V to 20 V input requirement see Figure 6 15V y Measured Signal cHHi 1 8V Differential 8V cho 11V 7V Figure 6 Differential voltage example common mode voltage of 11 V If you decrease the common mode voltage to 7 V the differential stays at 8 V However the solution now violates the input range condition of 10 V to 20 V The voltage on each analog input now swings from 3 V to 11 V Voltages between 10 V and 3 V are resolved but those below 10 V are clipped see Figure 7 14 USB 7204 User s Guide Functional Details 3V Measured Signal CHHI _7y 3V v 11V 8V Differential 7V 3V CHLO Y 11V Figure 7 Differential voltage example common mode voltage of 7 V Since the analog inputs are restricted to a 10 V to 20 V signal swing with respect to ground all ranges except 20 V can realize a linear output for any differential signal
36. t the digital I O terminals can be used to detect the state of any TTL level input 15 USB 7204 User s Guide Functional Details For more information on digital signal connections For more information on digital signal connections and digital I O techniques refer to the Guide to DAQ Signal Connections available on our web site at www mccdag com signals signals pdf Trigger input The digital trigger input TRIG_IN lets you start an acquisition when a signal s rising or falling edge is detected This pin is internally connected to the TRIG_IN pin on the Trigger Sync connector see page 11 SYNC I O The SYNC terminal is a bidirectional I O signal that can be configured as an input or an output default Configure as an external clock input to externally pace the A D conversions from an external source or another USB 7204 The SYNC terminal supports TTL level input signals of up to 50 kHz When used as a clock input the SYNC pin operates in one of two modes slave or gated slave o In slave mode the USB 7204 ignores the first clock pulse in order to ensure adequate setup time Use this mode when the USB 7204 is being paced from a continuous clock source such as a generator o In gated slave mode it is assumed that the clock signal is held off for an adequate amount of time for setup to occur No clock pulses are ignored Use this mode when the source of the external clock is another USB 7204 Configure a
37. with zero common mode voltage and full scale signal inputs The 20 V range is the exception You cannot put 20 V on CHHI and 0 V on CHLO since this violates the input range criteria The table below shows some possible inputs and the expected results Sample inputs and differential results CHHI CHLO Result 20 V OV Invalid 15 V 5 V Invalid 10 V OV 10 V 10 V 10 V 20 V OV 10 V 10 V OV 20 V 20 V 10 V 10 V 20 V 10 V OV 10 V 15 V 5 V 20 V 20 V 0 20 V Analog output You can connect up to two analog output connections to screw terminal pins 13 and 14 D A OUT 0 and D A OUT 1 Each channel can be paced individually at rates up to 10 000 updates per second Both channels can be paced simultaneously using the same time base at 5000 updates per channel The 0 4 096 V output range provides a convenient 1 mV per LSB when setting the output voltage levels Digital 1 0 The USB 7204 has two eight bit ports Port 0 to Bit 0 to Bit 7 and Port 1 to Bit 0 to Bit 7 Each port is configurable as either input or output Pull up down configuration The digital pins are configurable via jumpers for pull up to USB 5 V HD or pull down to ground LO Jumper JP2 configures Port 0 and JP1 configures Port 1 On power up and reset the DIO pins are configured as input and pulled by JP1 JP2 JP2 JP1 PORT 0 PORT 1 Figure 8 Jumper JPO and JP1 configuration When configured for inpu
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