USB-2408 Series User's Guide
Contents
1. Parameter Conditions Specifications Digital to analog DAC8552 converter Number of channels 2 Resolution 16 bits Output ranges Calibrated 10 V Uncalibrated 10 05 V software selectable Output transient Host PC is reset powered on suspended or a reset Duration 2 s command is issued to device Amplitude 2 V p p Initial power on Duration 50 ms Amplitude 5 V peak Differential non linearity 0 25 LSB typ 1 LSB max Output current AOUTx pins 5 0 mA max Output short circuit AOUTX connected to AGND Unlimited duration protection Output coupling DC 26 USB 2408 Series User s Guide Specifications Parameter Conditions Specifications Power on and reset state DACS cleared to zero scale 0 V 50 mV Output noise 60 UVims BW 1 5 KHz Settling time To rated accuracy 10 V step 75 uS Slew rate 1 0 V us Throughput Single channel 1000 S s max system dependent 0 01 S s min Multi channel 1000 S s ch max system dependent 0 01 S s min Table 14 Calibrated absolute accuracy specifications Range Accuracy LSB 10 V 16 0 Table 15 Calibrated absolute accuracy components specifications Range of reading Offset mV Temp drift C Absolute accuracy at FS mV 10 V 0 0183 1 831 0 00055 3 661 Table 16 Relative accuracy specifications Range Relative accuracy LSB 10 V 4 0 typ Analog input2. Pin Signal name Pin description Pin Signal name Pin description 1 CHO Channel 0 23 AGND Analog ground 2 CH8 Channel 8 24 CH15 Channel 15 3 AGND Analog ground 25 CH7 Channel 7 4 CH1 Channel 1 26 AGND Analog ground 5 CH9 Channel 9 27 CH14 Channel 14 6 AGND Analog ground 28 CH6 Channel 6 7 CH2 Channel 2 29 AGND Analog ground 8 CH10 Channel 10 30 CH13 Channel 13 9 AGND Analog ground 31 CH5 Channel 5 10 CH3 Channel 3 32 AGND Analog ground 11 CH11 Channel 11 33 CH12 Channel 12 12 AGND Analog ground 34 CH4 Channel 4 13 DGND Digital ground 35 AGND Analog ground 14 DIOO Digital input output 36 AOUT1 Note 10 Analog output 1 15 DIO1 Digital input output 37 AGND Analog ground 16 DIO2 Digital input output 38 AOUTO Note 10 Analog output 0 17 DIO3 Digital input output 39 CHAS Chassis ground 18 DIO4 Digital input output 40 5V 5 V output 19 DIO5 Digital input output 41 DGND Digital ground 20 DIO6 Digital input output 42 CTR1 Counter 1 21 DIO7 Digital input output 43 DGND Digital ground 22 DGND Digital ground 44 CTRO Counter 0 Note 10 On the USB 2408 these pins are labeled NC no connection 32 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 products USB 2408 USB 2408 2A0 to
3. ie et Er REED ia teak 31 Declaration of Conformity 7 cnini a 33 Preface About this User s Guide What you will learn from this user s guide This user s guide describes the Measurement Computing USB 2408 Series data acquisition devices and lists device specifications Conventions in this user s guide For more information about 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 USB 2408 Series hardware is available on our website 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 2408 Series Overview USB 2408 Series features The USB 2408 USB 2408 2A0 includes the following devices USB 2408 USB 2408 2AO These devi
4. 210 C 2 572 C 1 416 C I 0 C 0 935 C 0 469 C 0 022 1200 C 1 869 C 1 456 C 210 C 2 917 C 1 699 C k 0 C 1 017 C 0 526 C 0 029 1372 C 2 478 C 2 022 C 200 C 3 480 C 2 030 C N 0 C 1 201 C 0 659 C 0 029 1300 C 1 991 C 1 600 C 50 C 4 826 C 3 133 C R 250 C 2 117 C 1 424 C 0 082 1768 C 2 842 C 2 347 C 50 C 4 510 C 2 930 Co S 250 C 2 165 C 1 468 C 089 1768 C 3 187 C 2 597 C 250 C 5 489 C 3 956 C B 700 C 2 283 C 1 743 C 0 14 1820 C 2 202 C 1 842 C 200 C 2 413 C 1 352 C E 0 C 1 069 C 0 551 C 0 017 1000 C 1 575 C 1 211 C 200 C 2 821 C 1 676 C T 0 C 1 050 C 0 558 C 0 027 400 C 0 957 C 0 595 C To achieve the thermocouple accuracies listed above warm up the USB 2408 Series device for 45 minutes after the initial power on The accuracies listed above are only guaranteed if the device is housed in the plastic enclosure Analog input DC voltage measurement accuracy Table 5 DC Accuracy components and specifications All values are Offset Gain temperature temperature Gain error Offset INL error Absolute coefficient coefficient Range of reading error of range accuracy reading C p V C 10 V 0 0037 50 uV 0 0008 500 uV 0 0006 3 5 V 0 0047 25 uV 0 0008 300 uV 0 0006 2 2 5 V 0 0059 20 uV 0 0008 200 uV 0 0006 1 1 25 V 0 00
5. 3 17 8 18 0 18 1 18 3 18 9 18 8 19 2 0 3125 V 15 3 15 3 16 2 16 4 17 0 17 0 17 0 17 3 17 5 17 9 17 9 0 15625 V 14 5 14 1 15 3 15 5 15 7 16 1 16 1 16 1 16 8 169 17 1 0 078125 V 14 5 14 3 15 0 15 4 16 1 16 2 16 2 16 4 17 0 17 1 16 9 Channel switching error Table 10 Step response accuracy specifications Accuracy Range 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50 S s 25S s 10S s 5 S s 2 5 S s 10 V 0 0010 0 000896 10 000596 10 0004 0 000246 0 0002 0 0003 10 0002 0 000196 10 0001 0 000196 5 V 0 0009 0 000896 10 000446 10 0004 0 000396 0 0002 0 000246 10 000246 0 000196 0 0001 0 000196 2 5 V 0 0010 0 0007 10 000896 0 0004 0 000346 0 0002 0 000246 10 000246 10 000296 10 0001 0 0001 1 25 V 0 0013 0 000996 0 000896 0 0007 0 000446 0 000446 0 000346 10 000396 10 000396 10 000396 0 0003 20 625 V 0 002290 0 001696 0 001196 0 0011 0 0007 0 0007 0 000596 10 000546 10 000496 0 000596 0 0003 30 3125 V 0 0031 0 0031 0 0020 0 001796 0 0015 0 001246 0 0010 0 0010 10 001246 0 0009 0 000996 0 15625 V 0 0056 0 0062 0 0048 0 0037 0 0032 0 0025 0 002490 0 0021 0 0019 0 0022 0 0016 0 078125 V 0 0114 0 0123 0 0076 0 0070 0 0041 0 0051 0 0046 0 0036 0 0032 0 0030 0 0034 Channel switching error is defined as the accuracy t
6. 6 Replace the top section of the case and fasten it to the bottom section with the four screws Replace the rubber feet For more information about digital signal connections For general information about digital signal connections and digital I O techniques refer to the Guide to DAQ Signal Connections available on our web site at www mccdaq conysignals signals pdf The pull up pull down voltage is common to all of the internal 47 kQ resistors 18 USB 2408 Series User s Guide Functional Details External pull up pull down capability You can also place an external pull up resistor on any of the DIO bits which enables you to pull the DIO bit up to a voltage that exceeds the internal 5 V pull up voltage When using external pull up resistors be aware of the following You should either remove the J6 jumper or store it by attaching it to one of the three pins When using external pull up resistors be aware that the internal resistors cause a slight voltage impedance shift to digital lines in the on state as various lines change between the on off states J6 Internal jumper disabled placed on center pin only External pull up resistor DIOO DIO1 DIO2 DIO3 DIO4 DIO5 DIO6 DIO7 Figure 13 Digital I O external resistor configuration Counter input The CTRO and CTR1 terminals are 32 bit event counters that can accept frequency inputs up to 1 MHz The internal counter increments
7. DIO4 DIOS DIO6 DIO7 DGND Gn Qn ELM A dd N 000 Y 000006 000006 8 9 S 9 9 Figure 4 DIFF mode pinout These pins are labeled NC no connection on the USB 2408 Analog ground Analog input channel 7 low Analog input channel 7 high Analog ground Analog input channel 6 low Analog input channel 6 high Analog ground Analog input channel 5 low Analog input channel 5 high Analog ground Analog input channel 4 low Analog input channel 4 high Analog ground No connection Analog ground No connection Chassis ground 5 V user output Digital ground Counter channel 1 Digital ground Counter channel 0 11 USB 2408 Series User s Guide Functional Details Signal connections Input isolation USB 2408 Series devices are isolated data acquisition devices The analog I O digital I O counters and all the digital control timing are referenced to an isolated ground as shown in the figure below This ground is physically and electrically separate from the ground used by the circuit connected to the system bus interface Isolation provides a barrier between the host computer and potentially hazardous voltages by physically and electrically separating two parts of the measurement device The non isolated ground is common to the chassis ground of the computer while the isolated ground is not All analog measurements are made relative to the isolated ground See Figure 5 for details
8. Hz 8 245 Hz Resolution 19 6 bits 640 ys delay before next sample taken Figure 9 USB 2408 Series data rate vs resolution example Analog output USB 2408 2A0 only The USB 2408 2A0 has two 16 bit analog outputs AOUTO and AOUT1 Both outputs can be updated simultaneously at a rate of 500 S s per channel One output can be updated at a rate of 1000 S s The output range is fixed at 10 V The outputs default to 0 V when the host computer is shut down or suspended or when a reset command is issued to the device Digital I O You can connect up to eight digital I O lines to DIOO through DIO7 The digital I O terminals can detect the state of any TTL level input Digital input voltage ranges of up to 0 to 15 V are permitted with thresholds of 0 6 V low and 2 2 V high Each DIO channel is an open drain which when used as an output is capable of sinking up to 150 mA for direct drive applications 16 USB 2408 Series User s Guide Functional Details Figure 10 shows a typical DIO connection Typical DIO channel Isolated microcontroller ESD protection Figure 10 Digital output connection example The figure represents connections for one channel The other seven channels are connected in the same manner The maximum sink current is 150 mA per 8 channel bank or if all eight channels are used 18 mA maximum per channel Internal pull up pull down capability Unconnected inputs are pulled
9. Thermocouple measurement accuracy Thermocouple measurement accuracy specifications include polynomial linearization error cold junction compensation measurement error and are for sample rates up to 60S s These specs are for one year or 3000 operating hours whichever comes first There is a CJC sensor for each terminal block of the module The accuracy listed below assumes the screw terminals are at the same temperature as the CJC sensor The accuracy errors shown do not include the inherent accuracy error of the thermocouple sensor itself Contact your thermocouple supplier for details on the actual thermocouple sensor accuracy limitations Connect thermocouples to the USB 2408 Series device such that they are floating with respect to AGND When configuring thermocouple sensors keep any stray capacitance relative to AGND as small as possible to avoid settling time and accuracy errors The AGND and DGND pins are isolated from earth ground You can connect thermocouple sensors to voltages referenced to earth ground as long as isolation between the AGND DGND pins and earth ground is maintained 22 USB 2408 Series User s Guide Specifications Table 4 Thermocouple accuracy specifications including CJC measurement error All specifications are Sensor temperature Accuracy error Accuracy error Tempco Thermocouple range maximum typical C C
10. and when enabled it detects if an open circuit condition exists at the TC sensor USB 2408 Series devices provide electrostatic discharge ESD protection for each of the TC inputs However before handling TC sensors follow standard ESD practices and discharge any accumulated ESD charge Once the TC sensor is connected to the device the configuration options have been selected and the recommended 45 minute warm up has elapsed the device is ready to make high resolution DIFF temperature measurements Built in cold junction compensation CJC automatically compensates for the additional thermal EMFs generated by connecting the TC leads to the USB 2408 Series device terminal blocks CJC is performed using a high resolution temperature sensor connected close to the device terminal blocks The device includes two separate CJC sensors one on each side of the PCB Software corrects for the additional TCs created at the terminals Once the A D and CJC data is collected the application software uses this data to linearize to an accurate temperature reading The TC linearization uses the latest NIST linearization coefficients for each of the eight TC types supported by USB 2408 Series devices When configuring TC sensors keep any stray capacitance as small as possible relative to AGND to avoid settling time and accuracy errors For TC channels do not provide a return path to ground as this is done internally 14 USB 2408 Series User s
11. high by default to 5 V using 47 kQ resistors through jumper J6 on the circuit board The pull up pull down voltage is common to all 47 kQ resistors Complete the following steps to configure these inputs Caution The discharge of static electricity can damage some electronic components Before removing the USB 2408 Series device from its housing ground yourself using a wrist strap or touch the computer chassis or other grounded object to eliminate any stored static charge To open the case and set the J6 jumper do the following Turn the device over and rest the top of the housing on a flat stable surface Peel off the four rubber feet on the bottom of the device to access the screws Remove the four screws from the bottom of the device qe Bo bee s Hold both the top and bottom sections together turn the device over and rest it on the surface then carefully remove the top section of the case to expose the circuit board 5 Configure jumper J6 for either pull up pins 1 2 or pull down pins 2 3 The jumper is configured by default for pull up Figure 11 shows the location of the jumper on the board 17 USB 2408 Series User s Guide Functional Details Tid MAA AAA i ThE SEL T 0 ta AB RT M Mes Ihe T tU HEI E B CE 5 Figure 11 Location of J6 jumper Figure 12 shows the jumper configured for pull up and pull down 1 1 3 3 Pull u Pull down default Figure 12 J6 jumper configurations
12. inputs When connecting DIFF voltage inputs to a floating voltage source make sure there is a DC return path from each voltage input to ground You make this path by connecting a resistor from each low channel input to an AGND pin A value of approximately 100 kQ can be used for most applications This does not apply to channels configured for TC input as they have their own internal reference Leave unused input channels either floating or tied to an AGND terminal Source impedances should be kept as small as possible to avoid settling time and accuracy errors Figure 6 shows a DIFF voltage connection using a ground path resistor CHOH CHOL AGND CH1H CH1L AGND Figure 6 DIFF voltage connection with ground path resistor example Gain queue Use the USB 2408 Series channel gain queue feature to configure a list of channels modes and gains for each scan The settings are stored in a channel gain queue list that is written to local memory on the device The channel gain queue list contains one or more channel numbers and range settings You can configure up to 64 elements The channels can be listed in any order and can include duplicate channels for sampling at different ranges 13 USB 2408 Series User s Guide Functional Details An example of a 12 element list is shown in the table below Sample channel gain queue list Element
13. max Max input voltage range CTRO CTRI relative to AGND and DGND Note 7 20 V max power on off Input high voltage 1 3 V min 2 2 V max Input low voltage 1 5 V max 0 6 V min Schmitt trigger hysteresis 0 4 V min 1 2 V max Input bandwidth 3 dB 1 MHz Input capacitance 25 pf Input leakage current 120 nA S5 V 1 6 mAQ X15 V Input frequency 1 MHz max High pulse width 500 ns min Low pulse width 500 ns min Note 7 DGND pins are recommended for use with counter input pins The DGND and AGND are common and are isolated from earth ground Memory Table 21 Memory specifications EEPROM 4096 bytes isolated micro reserved for sensor configuration 256 bytes USB micro for external application use Microcontroller Table 22 Microcontroller specifications Type One high performance 8 bit RISC microcontroller with USB interface non isolated One high performance 16 bit RISC microcontroller for measurements isolated 29 USB 2408 Series User s Guide Specifications Power Table 23 Power specifications Parameter Conditions Specification Supply current Note 8 Quiescent current 275 mA Voltage supervisor limits 4 5 V gt Vex OF Vet gt 5 5 V PWR LED Off power fault 4 5 V lt Vexr lt 5 5 V PWR LED On 5 V user output voltage range Available at terminal block pin 40 4 75 V min to 5 25 V
14. more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2011 2014 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 2408 Series docx 2 Table of Contents Preface About this User s Guide 51er terere inicien rne ser rper ses Ser sul 5 What you will learn from this user s guide sse sese eee 5 Conventions in this user s guide Where to find more information Chapter 1 In
15. on resistance drain to source 4Q Note 3 DGND pins are recommended for use with digital input and digital output pins The DGND and AGND pins are common and are isolated from earth ground Note 4 Each DMOS transistor source pin is internally connected to DGND Note 5 The external pull up is connected to the digital output bit through an external pull up resistor Adding an external pull up resistor connects it in parallel with the internal 47 KQ pull up resistor of that particular digital input output bit Careful consideration should be made when considering the external pull up resistor value and the resultant pull up voltage produced at the load Note 6 Does not include the additional leakage current contribution that may occur when using an external pull up resistor 28 USB 2408 Series User s Guide Specifications Counter Table 20 CTR specifications Parameter Conditions Specification Pin name CTRO CTRI Number of channels 2 channels Resolution 32 bits Counter type Event counter Input type Schmitt trigger rising edge triggered Input source CTRO pin 44 CTRI pin 42 Counter read writes rates software paced Counter read System dependent 500 reads per second Counter write System dependent 500 writes per second Input characteristics Each CTRx input pin 562 kQ pull up resistor to 5 V 10 KQ series resistor Input voltage range 15 V
16. output calibration Table 17 Analog input output calibration specifications Parameter Specifications Recommended warm up time 45 minutes min Calibration Firmware calibration Calibration interval 1 year AI calibration reference 10 000 V 5 mV max Actual measured values stored in EEPROM Tempco 5 ppm C max Long term stability 30 ppm 1000 hours AO calibration procedure The analog output pin is internally routed to the analog input pin USB 2408 2A0 only AOUTx readback Each AOUTx output can be independently measured by the onboard A D converter USB 2408 2A0 only Software selectable 27 USB 2408 Series User s Guide Specifications Digital input output Table 18 Digital input specifications Parameter Specifications Number of I O 8 channels Configuration Each DIO bit can be independently read from DIN or written to DOUT The DIN bits can be read at any time whether the DOUT is active or tri stated Input voltage range 0 to 15 V Input type CMOS Schmitt trigger Input characteristics 47 KQ pull up pull down resistor 28 kQ series resistor Maximum input voltage range 0 V to 20 V max power on off relative to DGND Note 2 Pull up pull down configuration All pins pulled up to 5 V via individual 47 kQ resistors the J6 shorting block default position is pins 1 and 2 Pull down capability is available by placing the J6
17. when the TTL levels transition from low to high 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 and counter channels and the power terminal 19 USB 2408 Series User s Guide Functional Details Mechanical drawings 0000000009 000000 00000 Figure 14 USB 2408 Series device circuit board top and enclosure dimensions 20 Chapter 4 Specifications All specifications are subject to change without notice Typical for 25 C unless otherwise specified All specifications apply to all temperature and voltage input channels unless otherwise specified Specifications in italic text are guaranteed by design Analog input Table 1 General analog input specifications Parameter Conditions Specification A D converter type ADS1256 24 bit Sigma Delta A D data rates 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50 S s 25 S s 10 S s 5 S s 2 5 S s Throughput m Single channel 2 5 S s to 1102 94 S s software selectable Multiple channels 0 16 S s to 551 47 S s software selectable See Table 11 and Table 12 for details Number of channels 16 single ended or 8 differential software selectable Thermocouples require differential mode For each channel configured as differential you essentially lose two single ended channels Input isolation
18. 1 5 70 4 48 4 48 4 24 2 66 3 07 2 29 30 078125 V 13 47 15 02 9 17 6 88 4 28 4 16 4 00 3 57 2 28 2 13 2 40 Table 8 RMS noise performance specifications uVRMS A D data rate Range 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50 S s 25 S s 10 S s 5 S s 2 5 S s 10 V 19 22 15 17 10 87 6 83 4 62 4 62 4 05 2 89 1 81 1 44 1 44 5 V 8 60 7 21 5 18 3 92 2 46 2 17 2 17 2 16 0 90 0 72 0 72 i2 5V 4 99 4 36 2 72 2 15 1 14 1 07 1 07 0 87 0 58 0 60 0 60 1 25 V 2 81 2 66 2 10 1 41 0 83 0 83 0 76 0 58 0 51 0 51 0 43 0 625 V 2 86 2 51 1 28 1 12 0 81 0 73 0 66 0 58 0 38 0 40 0 30 0 3125 V 2 32 2 24 1 24 1 05 0 72 0 71 0 68 0 56 0 51 0 39 0 37 0 15625 V 2 01 2 55 1 13 1 00 0 86 0 68 0 68 0 64 0 40 0 47 0 35 0 078125 V 2 04 2 28 1 39 1 04 0 65 0 63 0 60 0 54 0 35 0 32 0 36 24 USB 2408 Series User s Guide Specifications Table 9 Noise free resolution specifications bits A D data rate Range 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50 S s 25 S s 10 S s 5S s 2 5 S s 10 V 17 2 17 6 18 1 18 7 19 3 19 3 19 5 20 0 20 6 21 0 21 0 5 V 17 4 17 6 18 1 18 5 19 2 19 4 19 4 19 4 20 6 21 0 21 0 42 5 V 17 2 17 4 18 1 18 4 19 3 19 4 19 4 19 7 20 3 20 7 21 0 1 25 V 17 0 17 1 17 4 18 0 18 8 18 8 18 9 19 3 19 5 19 5 19 7 0 625 V 16 0 16 2 17 1 17
19. 412 V 12V Non Isolated 3 3V 5V Power gt 33V Supply Figure 1 USB 2408 Series functional block diagram Chapter 2 Installing a USB 2408 Series Device What comes with your shipment As you unpack your USB 2408 Series device verify that the following components are included Hardware USB 2408 Series device USB 2408 or USB 2408 2AO USB cable 2 meter length 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 Unpacking As with any electronic device take care while handling to avoid damage from static electricity Before removing the USB 2408 Series device 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 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 Install
20. 50 1445 12 11 6 15 248 1 25 0 62 5 220 59 175 44 121 95 75 76 18 80 11 56 9 00 4 92 1 99 1 00 0 50 6 183 82 146 20 101 63 63 13 15 66 9 63 8 07 4 10 1 66 0 83 0 42 7 157 56 125 31 87 11 54 11 13 43 8 25 692 3 52 142 0 71 0 36 8 137 87 109 65 7622 47 35 1175 722 606 3 08 1 24 0 62 0 31 9 122 55 97 47 67 75 42 09 10 44 642 5 38 2 73 1 10 0 55 0 28 10 110 29 87 72 60 98 37 88 9 40 5 78 484 2 46 0 99 0 50 0 25 11 100 27 79 74 55 43 3444 8 54 525 440 2 24 0 90 0 45 0 23 12 91 91 73 10 50 81 31 57 7 83 482 4 04 2 05 0 83 0 42 0 21 13 84 84 67 48 46 90 29 14 723 444 3 73 1 89 0 76 0 38 0 19 14 78 78 62 66 43 55 27 06 6 71 4 13 3 46 176 0 71 0 36 0 18 15 73 53 58 48 40 65 2525 6 27 3 85 3 23 1 64 0 66 0 33 0 17 16 68 93 54 82 38 11 23 60 5 87 3 61 3 03 1 54 0 62 0 31 0 16 Analog voltage output USB 2408 2A0 only Unused AOUTX output channels should be left disconnected The USB 2408 2A0 output voltage level defaults to O V whenever the host PC is reset shut down or suspended or if a reset command is issued to the device The outputs may have a transient during startup The duration of the output transient depends highly on the enumeration process of the host PC Typically the output of the USB 2408 2A0 is stable after two seconds Table 13 USB 2408 2AO analog voltage output specifications
21. 500 VDC min between field wiring and USB interface Channel configurations Temperature sensor input software selectable to match sensor type Voltage input Input voltage range Thermocouple mode 0 078125 V Voltage mode Note 1 10 V 5 V 2 5 V 1 25 V 0 625 V 0 3125 V 0 15625 V 0 078125 V software selectable Absolute maximum input voltage CxH CxL relative to GND m 22 V max power on m 0 V max power off Input impedance 10 MQ power on m 390 Q power off Input leakage current 20 nA Input voltage 2330 V uA max power on off Input capacitance 590 pf Maximum working Voltage mode 10 25 V max voltage signal common mode Common mode rejection Thermocouple mode 110 dB ratio Note 1 fin 60 Hz Voltage mode 90 dB fin 60 Hz all input ranges ADC resolution 24 bits Crosstalk Adj chan DIFF mode 100 dB Input coupling DC Channel gain queue Up to 64 elements Software selectable channel and range Warm up time 45 minutes min Open thermocouple detect Software selectable for each channel CJC sensor accuracy 15 C to 35 C 0 5 C typ 0 C to 55 C 1 0 C max 21 USB 2408 Series User s Guide Specifications Note 1 Placing a notch of the A D digital filter at 60 Hz setting A D data rate 60 S s 10 S s 5 S s or 2 5 S s further improves the common mode rejectio
22. 56 20 uV 0 0008 100 uV 0 0006 1 0 625 V 0 0068 15 uV 0 0005 60 uV 0 0006 1 0 3125 V 0 0104 15 uV 0 0006 50 uV 0 0006 1 0 15625 V 0 0184 10 uV 0 0005 40 uV 0 0006 1 0 078125 V 0 0384 10 uV 0 0009 40 uV 0 0006 1 23 USB 2408 Series User s Guide Specifications Input bandwidth Table 6 input bandwidth A D data rate 3 db Bandwidth Hz 3750 S s 1615 2000 S s 878 1000 S s 441 500 S s 221 100 S s 44 2 60 S s 26 5 50 S s 221 25 S s 11 1 10 S s 4 42 5 S s 2 21 2 5 S s 1 1 Noise performance For the peak to peak noise distribution test a differential input channel is connected to AGND at the input terminal block and 50 000 samples are acquired at the maximum rate available at each setting Table 7 Peak to peak noise performance specifications uV A D data rate Range 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50 S s 25 S s 10 S s 5 S s 2 5 S s 10 V 126 84 100 14 71 76 45 06 30 52 30 52 26 70 19 07 11 92 9 54 9 54 5 V 56 74 47 56 34 21 25 87 16 21 14 31 14 31 14 30 5 96 4 77 4 77 42 5 V 32 96 28 79 17 94 14 19 7 51 7 09 7 09 5 72 3 81 4 00 4 00 1 25 V 18 57 17 52 13 83 9 30 5 48 5 48 5 01 3 81 3 34 3 34 2 86 0 625 V 18 88 16 58 8 45 7 41 5 32 4 80 4 38 3 86 2 50 2 61 1 98 0 3125 V 15 33 14 76 8 19 6 94 4 75 4 69 4 49 3 70 3 34 2 56 2 45 0 15625 V 13 28 16 84 7 47 6 6
23. Channel Range 0 CHO BIP10V 1 CHI BIPSV 2 CH0 BIP2PtSVOLTS 3 CH4 BIP2PtSVOLTS 4 CH8 BIP2PtSVOLTS 5 CHO BIPSV 6 CHI BIPIPt25VOLTS 7 CH7 BIPSV 8 CHO BIPIPt25VOLTS 9 CH15 BIP10V 10 CH9 BIPIPt25VOLTS 11 CH10 BIP2PtSVOLTS Carefully match the gain to the expected voltage range on the associated channel or an over range condition may occur Although this condition does not damage the device it does produce a useless full scale reading and can introduce a long recovery time due to saturation of the input channel For more information about analog signal connections For more information about analog input connections refer to the Guide to Signal Connections this document is available on our web site at www mccdaq com signals signals pdf TC input mode You can make up to eight high resolution DIFF TC measurements with a USB 2408 Series device Built in cold junction compensation sensors are provided for each of the screw terminal blocks and any supported TC type can be attached to any of the 8 TC channels Do not connect TCs as SE doing so can cause false readings You do not need to use ground referencing resistors for TC inputs because the analog front end circuit level shifts the TC output into the common mode input range of the A D USB 2408 Series devices also provide an open TC detection feature for each of the analog input channels configured for TC measurement This feature is enabled or disabled by software
24. Guide Functional Details Figure 7 shows a typical TC connection C HOL AGND H1H 24 bit ADS1256 H1L DODOD Figure 7 DIFF TC connection example Noise filtering data rate and throughput rate Although the USB 2408 Series A D converter has a maximum data rate of 3 750 samples per second the actual throughput rate you observe for voltage and temperature data is determined by these formulas Maximum single channel throughput 1 1 data rate 8540s Maximum multiple channel throughput 1 vA aa 640us where n is the number of channels See Table 18 and Table 19 in the Specifications chapter for details This drop off in throughput rate is due to the noise filtering feature in the device You can control the amount of the noise filtering by adjusting the data rate setting By reducing the data rate the averaging of samples increases and noise drops correspondingly Figure 8 illustrates this inverse relationship This graph applies to the A D converter only do not expect this level of performance from a USB 2408 Series device itself 25S N N Noise free bits o 8 30 000 S s ah o TN 00 0 1000 10 000 100 000 Data throughput S s Figure 8 USB 2408 Series A D converter data rate vs noise graph If low noise is your main concern you can operate the USB 2408 Series device at very low data rates starting from 2 5 samples per second S s At low rates much of the noise is average
25. USB 2408 Series 24 Bit Multifunction Temperature and Voltage Devices USB 2408 USB 2408 2AO User s Guide Document Revision 3 Va Y FA MEASUREMENT June 2014 AW V Sas COMPUTING Copyright 2014 Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Refer to www mccdaq com execteam html for the names titles and contact information of each key executive at Measurement Computing Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our mission To provide 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 Envir
26. ation increases the ability of the measurement system to reject common mode voltages The common mode voltage is the signal that is common to both the positive and negative inputs of the measurement device but is not part of the signal to measure Analog TC input Each analog input channel has the following measurement parameters Voltage input range TC type J K T E R S B or N You can select a unique input range or signal type for each channel For example one channel could be used for volts and another for temperature 12 USB 2408 Series User s Guide Functional Details Analog input mode You can configure the analog inputs for SE or DIFF mode The input voltage range is software selectable for 10 V 5 V x2 5 V 1 25 V 0 625 V 0 312 V 0 156 V or 0 078 V With SE mode connect up to 16 inputs to screw terminals CHO to CH15 SE mode requires two wires Connect one wire to the signal you want to measure CHx Connect one wire to the analog ground reference AGND Refer to Figure 3 on page 11 for the location of the SE inputs With DIFF mode connect up to eight differential inputs to screw terminals CHOH CHOL to CH7H CH7L DIFF mode requires two wires plus a ground reference Connect one wire to the high positive signal CHxH Connect one wire to the low negative signal CHxL Connect one wire to the analog ground reference AGND Refer to Figure 4 on page 11 for the location of the DIFF
27. ces are USB 2 0 full speed devices that are supported under the following operating systems Microsoft Windows 8 7 Vista XP 32 bit or 64 bit m Macintosh 32 bit or 64 bit Linux 32 bit or 64 bit Each USB 2408 Series device provides the following features 16 single ended SE or eight differential DIFF 24 bit analog inputs with sampling rates up to 1 kS s Each channel is software configurable as SE or DIFF For each DIFF channel pair you lose one SE channel Analog input ranges of 10 V 5 V 2 5 V 1 25 V 40 625 V 0 312 V 40 156 V and 40 078 V Up to eight analog inputs can be configured as DIFF thermocouple TC inputs which include built in cold junction compensation and open TC detection Computer protection provided through a minimum of 500 VDC input isolation between field wiring and the USB interface Eight lines of digital I O and two 32 bit counters Screw terminals for field wiring connections The USB 2408 2A0 also provides two 16 bit analog output channels You can pace a single channel at rates of up to 1 kS s You can pace both channels simultaneously at rates of up to 500 S s USB 2408 Series User s Guide Introducing the USB 2408 Series USB 2408 Series block diagram USB 2408 Series functions are illustrated in the block diagram shown here Calibration Voltage Sources QoooooooooHoooooolloooooo Microcontroller with full speed USB 2 0 Isolated Power Supplies
28. conforms to the above Directives and Standards GAP 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
29. d out of the data and issues such as reference noise become less important 15 USB 2408 Series User s Guide Functional Details At higher data rates higher frequency noise sources are not averaged out and begin to be troublesome These noise sources include the noise inherent in the A D converter itself which is not reducible Since TCs can pick up noise in your environment select a data rate based on the primary noise frequency For example to reduce the effect of 60 Hz noise select a data rate of 60 or a supported submultiple of 60 such as 10 or 5 Multiple channel throughput rates When setting different sample rates for channels be aware that all the channels will be sampled within the same sample window based on the channel with the lowest sample rate For example if you set a 10 Hz data rate for channel 0 and a 50 Hz data rate for channel 1 basically both channels pass the same number of samples per second to the host computer However more averaging is performed on channel 0 samples therefore channel 0 is sampled at a higher resolution The USB 2408 Series A D converter performs averaging and the number of averages equals 30 000 data rate In this example channel 0 is sampled 3000 times over 100 ms and all samples are averaged into one sample Then channel 1 is sampled 600 times over 20 ms and samples are likewise averaged into one sample The final samples are available to you at a maximum rate of about 8
30. erential mode pinout Pin Signal name Pin description Pin Signal name Pin description 1 CHOH Channel 0 HI 23 AGND Analog ground 2 CHOL Channel 0 LO 24 CH7L Channel 7 LO 3 AGND Analog ground 25 CH7H Channel 7 HI 4 CH1H Channel 1 HI 26 AGND Analog ground 5 CH1L Channel 1 LO 27 CH6L Channel 6 LO 6 AGND Analog ground 28 CH6H Channel 6 HI 7 CH2H Channel 2 HI 29 AGND Analog ground 8 CH2L Channel 2 LO 30 CH5L Channel 5 LO 9 AGND Analog ground 31 CH5H Channel 5 HI 10 CHSH Channel 3 HI 32 AGND Analog ground 11 CH3L Channel 3 LO 33 CH4L Channel 4 LO 12 AGND Analog ground 34 CH4H Channel 4 HI 13 DGND Digital ground 35 AGND Analog ground 14 DIOO Digital input output 36 AOUT1 Note 9 Analog output 1 15 DIO1 Digital input output 37 AGND Analog ground 16 DIO2 Digital input output 38 AOUTO Note 9 Analog output 0 17 DIOS Digital input output 39 CHAS Chassis ground 18 DIO4 Digital input output 40 5V 5 V output 19 DIO5 Digital input output 41 DGND Digital ground 20 DIO6 Digital input output 42 CTR1 Counter 1 21 DIO7 Digital input output 43 DGND Digital ground 22 DGND Digital ground 44 CTRO Counter 0 Note 9 On the USB 2408 these pins are labeled NC no connection 31 USB 2408 Series User s Guide Specifications Table 29 16 channel single ended mode pinout
31. hat can be expected after one conversion when switching from a channel with a DC input at one extreme of full scale to another channel with a DC input at the other extreme of full scale expressed in terms of percentage of full scale value Throughput rate The single channel throughput rate is calculated using this formula 1 1 Maximum throughput data rate 640us Table 11 Single channel throughput rate specifications A D data rate Maximum throughput Hz 3750 S s 1102 94 2000 S s 877 19 1000 S s 609 76 500 S s 378 79 100 S s 93 98 60 S s 57 78 50 S s 48 45 25 S s 24 61 10 S s 9 94 5 S s 4 98 2 5 S s 2 50 25 USB 2408 Series User s Guide Specifications The multiple channel throughput rate is calculated using this formula 1 1 y A 640us Maximum throughput n a ram where n is the number of channels Table 12 Multiple channel throughput rate specifications Hz Number of input channels 3750 S s 2000 S s 1000 S s 500 S s 100 S s 60 S s 50S s 25 S s 10S s 5S s 2 5 S s 1 1102 94 877 19 609 76 378 79 93 98 57 78 4845 24 61 9 94 4 98 2 50 2 551 47 438 60 304 88 189 39 46 99 28 89 2422 12 30 497 2 49 125 3 367 65 292 40 20325 126 26 31 33 19 26 16 15 8 20 3 31 1 66 0 83 4 275 74 219 30 152 44 94 70 23
32. i Isolation barrier VO connectors AIN TIN f Bene O y T T b e d Aout Isolated U U D D D D i i i D D D i 1 B U U 1 D D D i i i U i 1 ee A gt TUE Non AR SS Digital i isolated USB UC isolator C SL H amp d Isolated ground t ground Figure 5 USB 2408 Series input isolation diagram When making measurements in industrial environments DAQ devices can encounter hazardous voltages transients large common mode voltages and fluctuating ground potentials Any one of these issues can seriously degrade the measurement accuracy of the device and possibly damage the measurement instrument To overcome these issues some DAQ devices provide physical and electrical isolation Some of the benefits of isolation include Safety A DAQ device employing physical and electrical isolation helps to keep high voltages and transients from damaging the system side host computer Ground loops Improper grounding of the signal source that the DAQ device is measuring is one of the most common sources of noise and measurement inaccuracies Isolation improves the measurement accuracy by physically preventing ground loops Ground loops a common source of noise and error are the results of a measurement system having multiple grounds at different potentials Common mode rejection With isolation a DAQ device can measure small signals in the presence of large common mode voltages Isol
33. ing the software Refer to the Quick Start Guide for instructions on installing the software on the MCC DAQ CD This booklet is available in PDF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf Installing the hardware Install the software before you install your device A driver needed to run the USB 2408 Series device is installed when you install the software Therefore you need to install the software package you plan to use before you install the hardware To connect a USB 2408 Series device 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 No external power is required When you connect the device for the first time to a computer running Windows a Found New Hardware dialog opens when the operating system detects the device The dialog closes after the device is installed A green Status LED indicates the device status When the LED is on the device is powered and ready for operation If the LED is not on the device is not powered or did not initialize Figure 2 on page 10 shows the location of the STATUS LED USB 2408 Series User s Guide Installing a USB 2408 Series Device Caution Do not disconnect any device from the USB bus while the computer is communicating with the USB 2408 Series device or you may lose data and or your abi
34. ity LED indicates the communication status of a device This LED blinks when data is transferred and is off when the device is not communicating Screw terminals USB 2408 Series devices have two banks of screw terminals Screw terminal functions for DIFF and SE modes are identified in Figure 4 and Figure 3 The USB 2408 Series device screw terminals provide the following connections 16 SE CHO to CH15 see Figure 3 or eight DIFF CHOH CHOL to CH7H CH7L analog input connections Eight digital I O connections DIOO to DIO7 Two analog output connections AOUTO AOUT1 USB 2408 2A0 only Two counter inputs CTRO CTR1 One power output 5V 10 analog grounds AGND four digital grounds DGND and one chassis ground CHAS 10 USB 2408 Series User s Guide Functional Details Analog input channel 0 CHOH 1 0 23 AGND Analog ground Analog input channel 8 CHOL 2 lS 24 CH15L Analog input channel 15 Analog ground AGND 3 l 25 CH7H Analog input channel 7 Analog input channel 1 CH1H 4 O 26 AGND Analog ground Analog input channel 9 CHiL 5 l 27 CH6L Analog input channel 14 Analog ground AGND 6 O 28 CH6H Analog input channel 6 Analog input channel 2 CH2H 7 29 AGND Analog ground Analog input channel 10 CH2L 8 30 CH5L Analog input channel 13 Analog ground AGND 9 31 CH5H Analog input channel 5 Analog input channel 3 CH3H 10 32 AGND Analog ground Analog input channel 11 CH3L 11 33 CHAL Analog input cha
35. lity to communicate with the device If the Status LED turns off If the Status LED turns on but then turns off the computer has lost communication with the USB 2408 Series device To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the Status LED should turn on Calibrating Factory calibration The Measurement Computing Manufacturing Test department performs the initial factory calibration Contact Measurement Computing for details about how to return your device and have it calibrated to the factory specifications Field calibration USB 2408 Series hardware supports field calibration You should calibrate the device with InstaCal whenever the ambient temperature changes by more than 10 C from the last calibration Chapter 3 Functional Details External components USB 2408 Series devices have the following external components USB connector LEDs Screw terminals Figure 2 shows the location of each component 1 Screw terminal pins 28to 44 4 USB Connector 2 Status LED 5 Screw terminal pins 1 to 22 3 Activity LED Figure 2 USB 2408 Series components USB connector The USB connector provides 5 V power and communication No external power supply is required LEDs USB 2408 Series devices have two LEDs STATUS and ACTIVITY The Status LED is lit when the device is detected and installed on the computer The Activ
36. max 5 V user output current Available at terminal block pin 40 10 mA max Isolation Measurement system to PC 500 VDC min Note 8 This is the total quiescent current requirement for the USB 2408 Series which includes up to 10 mA for the status LED This does not include any potential loading of the digital I O bits 5 V user terminal or the AOUTXx outputs USB specifications Table 24 USB specifications Parameter Specifications USB device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 USB cable type A B cable UL type AWM 2527 or equivalent min 24 AWG VBUS GND min 28 AWG D D USB cable length 3 meters max Environmental Table 25 Environmental specifications Parameter Specifications Operating temperature range 0 C to 50 C max Storage temperature range 40 C to 85 C max Humidity 0 to 90 non condensing max Mechanical Table 26 Mechanical specifications Parameter Specifications Dimensions L x W x H 127 x 89 9 x 35 6 mm 5 00 x 3 53 x 1 40 in User connection length 3 meters max Screw terminal connector type and pinout Table 27 Screw terminal connector specifications Connector type Fixed screw terminal Wire gauge range 16 AWG to 30 AWG 30 USB 2408 Series User s Guide Specifications Screw terminal pinout Table 28 8 channel diff
37. n of this frequency Channel configurations When any item is changed the firmware stores channel configurations in the EEPROM of the isolated microcontroller An external application issues commands over the USB to make changes and the configuration is made non volatile through the use of the EEPROM When connecting differential voltage inputs to a floating voltage source provide a DC return path from each voltage input to ground To do this connect a resistor from each input to an AGND pin A value of approximately 100 kQ can be used for most applications Leave unused input channels either floating or tied to AGND For each voltage thermocouple channel configured as differential you essentially lose one single ended channel Keep source impedances as small as possible to avoid settling time and accuracy errors Table 2 Channel configurations Channel Category Specification CxH CxL Thermocouple 8 differential channels CxH CxL Voltage 16 individually configurable channels that can be configured as either single ended or CxH CxL Voltage 8 differential Compatible sensors Table 3 Compatible sensor type specifications Parameter Conditions Thermocouple J 210 C to 1200 C K 270 C to 1372 C R 50 C to 1768 C S 50 C to 1768 C T 270 C to 400 C N 270 C to 1300 C E 270 C to 1000 C B 0 C to 1820 C Accuracy
38. n trennen 17 External pull up pull down Capability s i ro term e Pe ER E ERE DP E 19 Counter input sees cs Rn REP n DI e eU rr Oa nO ATRA 19 Ground iun Uc RR ERAS EHE REOR UO ERRARE n 19 Mechanical dr wIngs s eere Et EUR UR OL ta 20 Chapter 4 Specifications Analog input Channel configurations iste oen Eo ne o RU aaah e ei PO peti ete Eee n oe Ode t ree toO Compatible E estre ert e reae PE UO dese ire ete Perotti b prede e ecd e pae ACQCUFAGy orte DERE Thermocouple measurement accuracy Analog input DC voltage measurement accuracy sees eee eee eee 23 Inputbandwidtlli Lai eene RON Noise performance Channel switching error o entem ee ER ORE A a EORR 25 Throughput rate rU oH CRI ODD D RERO Dp ie eg br ERG 25 USB 2408 Series User s Guide Analog voltage output USB 2408 2A0 onl 26 Analoganput outp t calibration se notte deti rie ide e eet diee dnce de n edo ed e 27 Digital Input OUtpUt aiio ERROR en eise inte eee HR tA et ten itecto 28 COUTET 29 uu EUER 29 Microcontroll t ue a iia 29 PoWerc sie hits Ries Siow wees Shia Sean feet he RAS AAS eps is le aC 30 USB specifications el estes Sei ERT a eee ee sek ee ee A a ERNE 30 Environmental eie ue tue DD RERO ORIG DINERO DUI Dp te DU PPM 30 Mechanical erro RU PERPE RE RERO EE ER 30 Screw terminal connector type and pinout sees esse ee eee eee 30 Screw termiiial pinout
39. nnel 12 Analog ground AGND 12 34 CH4H Analog input channel 4 35 AGND Analog ground 36 NC No connection 37 AGND Analog ground Digital ground DGND 13 38 NC No connection Digital input output channel O DIOO 14 Digital input output channel 1 DIO1 15 Digital input output channel 2 DIO2 16 Digital input output channel 3 DIO3 17 39 CHAS Chassis ground Digital input output channel 4 DIO4 18 40 5V 5 V user output Digital input output channel 5 DIOS 19 41 DGND Digital ground Digital input output channel 6 DIO6 20 42 CTR1 Counter channel 1 Digital input output channel 7 DIO7 21 43 DGND Digital ground Digital ground DGND 22 9 44 CTRO Counter channel 0 Figure 3 SE mode pinout These pins are labeled NC no connection on the USB 2408 Analog input channel 0 high Analog input channel 0 low Analog ground Analog input channel 1 high Analog input channel 1low Analog ground Analog input channel 2 high Analog input channel 2 low Analog ground Analog input channel 3 high Analog input channel 3 low Analog ground Digital ground Digital input output channel 0 Digital input output channel 1 Digital input output channel 2 Digital input output channel 3 Digital input output channel 4 Digital input output channel 5 Digital input output channel 6 Digital input output channel 7 Digital ground CHOH CHOL AGND CH1H CH1L AGND CH2H CH2L AGND CH3H CH3L AGND DGND DIOO DIO1 DIO2 DIO3
40. onment Warranty Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of the current list price I O boards face some harsh environments some harsher than the boards are designed to withstand Contact MCC to determine your product s eligibility for this program 30 Day Money Back Guarantee Any Measurement Computing Corporation product may be returned within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified in advance of the possibility of such damages Trademark and Copyright Information 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
41. shorting block across pins 2 and 3 Transfer rate software paced 500 port reads or single bit reads per second typ Input high voltage 1 3 V min 2 2 V max Input low voltage 1 5 V max 0 6 V min Schmitt trigger hysteresis 0 4 V min 1 2 V max Note 2 DGND pins are recommended for use with digital input and digital output pins The DGND and AGND pins are common and are isolated from earth ground Table 19 Digital output specifications Parameter Specifications Number of I O 8 channels Configuration Note3 Each DIO bit can be independently read from DIN or written to DOUT The DIN bits may be read at any time whether the DOUT is active or tri stated Output characteristics Note 4 47 KQ pull up open drain DMOS transistor Pull up configuration All pins pulled up to 5 V via individual 47 kQ resistors the J6 shorting block default position is pins 1 and 2 Transfer rate software paced Digital output 500 port writes or single bit writes per second typ Output voltage range 0 V to 5 V no external pull up resistor internal 47 KQ pull up resistors connected to 5 V by default Note 6 0 V to 15 V max Note 5 Drain to source breakdown 50 V min voltage Off state leakage current 1 0 uA Sink current capability m 150 mA max continuous per output pin 150 mA max continuous for all eight channels DMOS transistor
42. troducing the USB 2408 Series sees se eves esec esec es seer ereer neee neee nreo ennenen enen 6 Overview USB 2408 Series features T 6 USB 2408 Series block diagram essent enne NATORREN testen eren enne 7 Chapter 2 Installing a USB 2408 Series Device vese se esec es eee ee eser eser esse eers neee 8 What comes with your shipment sese eee eee eee 8 Hardware Documentation nas e 8 Installing the software Installing the hardware Calibrating 5e Aa SEGA eddie ds Factory Calibration sss ee i re E OTRO UT GIU ER UE E ORO n EMI PE HERI Field calibration eR EE Chapter 3 Functional Details REED II m 10 External components repe eee he Omne DOT Ore RU ette pps e rper ORG er ee egeret n 10 USB e L L ATS 10 Signal connectighs 5i taste AIL ee eed ee t ette ii tesi Et rte o Pes 12 Input isol tiOT s oer ERU UT COPIO NE I EHEERIRU DEOR n Op AERE RI prO OI 12 Analoo TC input A E EAN 12 Analog put mode seins iesteoteai dere rete beoe t lo a aa a pedo e ed epe 13 erm ER RO 13 TC mput mode x eR E RUE en eer ate ep bmi 14 Analog output USB 2408 2AO TT tete ts 16 Digital VO A a EO SEER o e EDU ER n re Menten gen ele un 16 Internal pull up pull down capability eiaa nenne netnrenetetnet nenne KENN ener de SED trete
43. which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EC EMC Directive 2004 108 EC General Requirements EN 61326 1 2006 IEC 61326 1 2005 Emissions EN 55011 2007 CISPR 11 2003 Radiated emissions Group 1 Class A EN 55011 2007 CISPR 11 2003 Conducted emissions Group 1 Class A Immunity EN 61326 1 2006 Table 3 IEC 61000 4 2 2001 Electrostatic Discharge immunity IEC 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 I O cables 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 November 2010 Test records are outlined in Chomerics Test Report EMI5755 10 We hereby declare that the equipment specified
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