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DaqBoard/500 Series User’s Manual

887293

Connections & Pinouts 2-9

Differential (DIFF)

In installations where each Ground Referenced Source signal has a local ground [signals located remote from one
another] the Differential configuration

must be used

. Since the Differential configuration only responds to the

difference in a signal between its high and low voltages, any Common Mode Voltage will be cancelled out. In
addition, Differential configuration provides the best performance of the two configurations in an electrically noisy
environment.

The Differential configuration should be used when any of the following exist:

Each source has a local ground

Signal sources are remote from one another

Common Mode Voltage exists

Common Mode Noise exists

Signal sources are low-level (less than 1 V)

Signal source leads are longer that 12 feet

Differential for Grounded Signal Sources

The following figure is an example of a Differential Configuration for grounded signal sources.

Differential Configuration for Grounded Sources

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Содержание OMB-DAQBOARD-500 Series

Страница 1: ...omega com e mail info omega com For latest product manuals omegamanual info Shop online at User sGuide OMB DAQBOARD 500 Series 16 Bit 200 KHz PCI Data Acquisition Boards OMB 1138 0901 rev 2 3 324545A 01 ...

Страница 2: ...nce TEL 33 0 1 61 37 2900 FAX 33 0 1 30 57 5427 Toll Free in France 0800 466 342 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail info omega de United Kingdom One Omega Drive River Bend Technology Centre ISO 9002 Certified Northbank Irlam Manchester M44 5BD United Kingdom TEL 44...

Страница 3: ...artons and related procedures This symbol indicates the message is important but is not of a Warning or Caution category These notes can be of great benefit to the user and should be read In this manual the book symbol always precedes the words Reference Note This type of note identifies the location of additional information that may prove helpful References may be made to other chapters or other...

Страница 4: ...pecial attention to Warnings and Cautions Note During software installation Adobe PDF versions of user manuals will automatically install onto your hard drive as a part of product support The default location is in the Programs group which can be accessed from the Windows Desktop Initial navigation is as follows Start Desktop Start pull down menu Programs Omega DaqX Software You can also access th...

Страница 5: ...erminal Connector Option 2 6 External Connections 2 7 3 Configuration Configuration through Software 3 1 Analog Input Configuration 3 1 ADC Ranges 3 1 DAC Ranges 3 2 4 Software and Board Operation Overview 4 1 Out of the Box Software 4 1 Drivers for Third Party Icon Driven Software 4 2 DaqCOM Driver 4 2 Theory of Operation 4 3 5 CE Compliance Overview 5 1 CE Standards and Directives 5 1 Safety Con...

Страница 6: ...This product requires one of the following Operating Systems Windows 2000 Windows XP ...

Страница 7: ...t locations The board serial number and board type 500 or 505 is located on the solder side of the board Board Identity on Solder Side of the Board Board Type e g 500 505 Serial Number PCI Bus Slot Location Board 1 Board 2 Board 3 Board 4 The host PC can support up to four Boards DaqView 500 Authorization Code ____________________________ Customers who ordered DaqView 500 can find their authorizat...

Страница 8: ...Hz 128 M byte RAM Windows 2000 or XP Operating System Installation A Pictorial Overview Step 1 Install Software IMPORTANT Software must be installed before installing hardware 1 Remove previous version Daq drivers if present You can do this through Microsoft s Add Remove Programs feature 2 Place the Data Acquisition CD into the CD ROM drive Wait for PC to auto run the CD This may take a few moment...

Страница 9: ...hat your computer is capable of performing Bus Mastering DMA for the applicable PCI slot Note that some computers have BIOS settings that enable or disable Bus Mastering DMA If your computer has this BIOS option ensure that Bus Mastering DMA is Enabled on the appropriate PCI slot Refer to your PC Owner s Manual for additional information regarding your PC and enabling Bus Mastering DMA for PCI slo...

Страница 10: ...eps install additional boards into available PCI bus slots if applicable to your application 11 Replace the computer s cover 12 Plug in all cords and cables that were removed in step 1 13 Apply power to and start up the PC Note At this point some PCs may prompt you to insert an installation disk While this is rare if you do receive such a prompt simply place the install CD ROM into the disk drive ...

Страница 11: ... The DaqBoard s Properties tab will appear following figure Note If the DaqBoard icon is not present skip to the upcoming section Using Add Device Accessing the DaqBoard 500 Properties Tab 6 Enter a Device Name in the text box or use the default e g DaqBoard500_0 The Name is for identifying the specific DaqBoard but actually refers to the PCI slot 7 Verify that the Device Type shows the correct bo...

Страница 12: ... the Resource Test button 3 After the test is complete click OK System capability is now tested for the DaqBoard and a list of test results will appear Note If you experience difficulties please consult your user documentation included on your CD before calling for technical support Test Hardware Tab Condensed Screen Image At this point we are ready to connect signals For DaqBoard 500 Series board...

Страница 13: ...ation method is used for both analog to digital and digital to analog conversions Please contact the factory should you believe your board to be in need of calibration Basic Information Analog Inputs 16 Single Ended or 8 Differential Ranges Unipolar 0 to10V 0 to 5V 0 to 2 5V 0 to 1 25V Bipolar 10V 5V 2 5V 1 25V Resolution 16 bit A D Sample Rate 200 kHz Gains Programmable x1 x2 x4 x8 D A Outputs 16...

Страница 14: ...1 2 Introduction 947294 DaqBoard 500 Series User s Manual Block Diagram DaqBoard 500 Series Block Diagram ...

Страница 15: ...omatic integration into the PC s configuration when first installed The PCI interface provides access to all on board registers for software configuration of all on board functions For maximum performance the boards feature a 32 bit bus mastering DMA engine on the ADC and DAC hardware to provide high speed transfers between the board and system memory DMA Engine Interrupt latency on the PCI bus ca...

Страница 16: ...1 4 Introduction 947294 DaqBoard 500 Series User s Manual ...

Страница 17: ...lways handle components carefully and you should never touch connector pins or circuit components unless you are following ESD guidelines in an appropriate ESD controlled area Such guidelines include the use of properly grounded mats and wrist straps ESD bags and cartons and related procedures Overview DaqBoard 500 Series boards communicate external from the host PC through a 68 pin SCSI III conne...

Страница 18: ... O Ch B5 T 13 B2 A TTL Level Digital I O Ch B2 47 B3 TTL Level Digital I O Ch B3 A 14 B0 L TTL Level Digital I O Ch B0 48 B1 TTL Level Digital I O Ch B1 L 15 A6 TTL Level Digital I O Ch A6 49 A7 TTL Level Digital I O Ch A7 16 A4 I TTL Level Digital I O Ch A4 50 A5 TTL Level Digital I O Ch A5 I 17 A2 O TTL Level Digital I O Ch A2 51 A3 TTL Level Digital I O Ch A3 O 18 A0 TTL Level Digital I O Ch A0...

Страница 19: ...Signal Definitions The following is a description of each of the signals available at the 68 pin SCSCI Type III connector as indicated in the preceding pinout Analog Input Channels These channel signals are over voltage protected to 20 V above or below the 15 V power supply The channel inputs can withstand input voltages of up to 20 volts when the power to the system is off Differential Channels P...

Страница 20: ... to the ADCLKOUT TMR1 pin or associated terminal at any given time TIMER 1 is automatically disabled in hardware when the ADCLKOUT is enabled ADTRGIN Uses pin 6 ADTRGIN is the External ADC Trigger Gate Input This input recognizes TTL level signals and is used to start or stop the ADC acquisition process The input is selectable as either rising falling edge or active high low level sensitivity ADTR...

Страница 21: ...for an External Clock Input would not be possible unless COUNTER 1 was being used to count the DAC s External Clock Input signal DATRGIN Uses pin 38 DATGRIN is the External DAC0 Trigger Gate Input This input recognizes TTL level signals and is used to start or stop the DAC acquisition process The input is selectable as either rising falling active edge or active high low level sensitivity Ground L...

Страница 22: ... Analog Input Channel 12 61 B4 Digital I O Line B4 12 AGND Analog Common Note 2 B5 Digital I O Line B5 46 ACH5 Analog Input Channel 5 60 B6 Digital I O Line B6 11 ACH13 Analog Input Channel 13 26 B7 Digital I O Line B7 45 AGND Analog Common Note 2 C0 Digital I O Line C0 10 ACH6 Analog Input Channel 6 25 C1 Digital I O Line C1 44 ACH14 Analog Input Channel 14 58 C2 Digital I O Line C2 9 AGND Analog...

Страница 23: ...r pin 1 Note 6 The following table provides screw terminal reference for connecting analog channels differentially as opposed to single ended Differential Channels Screw Terminal Reference HI LO Ch 0 ACH0 ACH1 Ch 1 ACH2 ACH3 Ch 2 ACH4 ACH5 Ch 3 ACH6 ACH7 Ch 4 ACH8 ACH9 Ch 5 ACH10 ACH11 Ch 6 ACH12 ACH13 Ch 7 ACH14 ACH15 External Connections WARNING Always turn the computer power OFF and unplug it b...

Страница 24: ...eed to select the proper input configuration on your data acquisition board Single Ended Applications with a Floating Source are typically wired to a data acquisition board configured for Single Ended SE configuration Since only one wire from each input signal is connected to a multiplexed input of the A D the Single Ended configuration provides a larger number of inputs per board than Differentia...

Страница 25: ... In addition Differential configuration provides the best performance of the two configurations in an electrically noisy environment The Differential configuration should be used when any of the following exist Each source has a local ground Signal sources are remote from one another Common Mode Voltage exists Common Mode Noise exists Signal sources are low level less than 1 V Signal source leads ...

Страница 26: ...of resistance between each analog input and ground In most cases the 10 MΩ of resistance is sufficient for the return of bias current Resistor Connection Scenarios If the Input Signal is DC Coupled If the Input Signal is AC Coupled Use a Resistor Value from 10 KΩ to 100 KΩ Use resistors with values from 10 KΩ to 100 KΩ Connect the resistor between a Connect one resistor between Input Signal Return...

Страница 27: ...on combination ADC Ranges The analog inputs may be configured for either 10 V bipolar or 0 to10 V unipolar operation The input range is programmable on a channel by channel basis in a 176 element channel configuration RAM Note that the range selection also applies to expansion channels The programmable gain circuitry must also be taken into account in defining the usable error free input range The...

Страница 28: ...lution for each range Note that resolution is not accuracy Resolution defines the minimum definable voltage increment Absolute DC accuracy and relative accuracy define exactly how close the actual voltage output will be to the expected output DAC OUTPUT DaqBoard 500 DAC Range Resolution Range Configuration Full Scale Range Microvolt Resolution BIPOLAR 10 00 V 305 600 µV bit UNIPOLAR 0 to 10 00 V 1...

Страница 29: ... display capabilities of Excel eZ PostView provides a simple method of graphically viewing acquired data Up to 8 windows can be displayed on one screen with up to 16 channels overlaid on each window eZ PostView makes it simple to visually inspect acquired waveforms from multiple channels within seconds of acquiring the data Documentation in Adobe PDF format is provided on the CD Refer to the PostA...

Страница 30: ...als can be ordered from the factory Drivers for Third party Icon driven Software DaqView can only be used with one DaqBoard at a time LabVIEW can be used with multiple boards For multiple board use via custom programming refer to the Using Multiple Devices section of the Programmer s Manual or to DaqCOM documentation LabVIEW The DaqBoard 500 Series boards are fully supported by our data acquisitio...

Страница 31: ...rdless of whether the data coding is for unipolar or bipolar inputs The number is typically multiplied by a scale factor to convert it to useful engineering units For example An input in the range of 0 to 10 V uses a scale factor of 0 000152800V bit A DAC DATA value of 32723 when multiplied by 0 00015280 results in 5 000044 V at the DAC output line ADC Conversion This is the process of sampling a ...

Страница 32: ...rnal event ADCLKIN is an edge sensitive input that can be programmed to cause conversions The ADCLKIN is selectable as either rising or falling edge sensitive Once an ADC clock is received the Analog input is immediately sampled Converted data will become available within 5 microseconds max Any attempt to clock the ADC while an A D conversion is currently running will result in a Clock Error ADC M...

Страница 33: ...e switched On and Off with the external ADTRGIN input The input is level sensitive and selectable as either active high or active low control If the on board pacer clock drives the ADC the external gate input is used to enable and disable the ADC s pacer clock after being polarity conditioned The ADC clock will be enabled as long as the gate input is in the active state ADC External Trigger The ex...

Страница 34: ...triggered the ADC Conversion Counter immediately increments after each conversion until it reaches 0 whereupon ADC conversions are automatically disabled If the timer is loaded with a value of 1 the ADC will be stopped after one valid clock If this register is loaded with the value 0 the full count 65 536 conversions will occur Note that the Software and External Gate modes described in the sectio...

Страница 35: ...DACLKIN is an edge sensitive input that can be programmed to cause conversions The DACLKIN is selectable as either rising or falling edge sensitive DAC Maximum Clock Rate The maximum rate which the DAC should be clocked and retain optimal accuracy is limited by the DAC chip itself These limits may not be exceeded If the pacer clock is run faster some of the clock pulses will be ignored by the circ...

Страница 36: ...4 8 Software and Board Operation 988994 DaqBoard 500 Series ...

Страница 37: ...interfere with radio or telecommunications 2 The device must be immune from electromagnetic interference from RF transmitters etc The standards are published in the Official Journal of European Union under direction of CENELEC European Committee for Electrotechnical Standardization The specific standards relevant to Daq equipment are listed on the product s Declaration of Conformity and include CI...

Страница 38: ... strap etc Use care to avoid touching board surfaces and onboard components Only handle boards by their edges or ORBs if applicable Ensure boards do not come into contact with foreign elements such as oils water and industrial particulate Daq products contain no user serviceable parts refer all service to qualified personnel The specific safety conditions for CE compliance vary by product but gene...

Страница 39: ...ne by the user via software Analog Inputs Number of Inputs 16 Single ended or 8 Differential programmable on per channel basis Resolution 155 070 µV bit on 0 to 10 V range Acquisition Rate 200 kHz max A D Full Scale Ranges 10 V 0 to 10 V Programmable Gain x1 x2 x4 x8 ADC Nonlinearity Integral 1 LSB ADC Nonlinearity Differential 3 LSB no missing codes Input Ranges Range Accuracy Settling Time 10 V ...

Страница 40: ...V Gain Channel Selection 176 element Analog Input Triggering Clocking Clock Sources o on board programmable pacer o user defined external TTL External Clock Input Latency o 5us max Trigger Sources Stop Sources o software command o External TTL o software Analog as follows above level below level rising above level falling below level inside window outside window o software command o software Analo...

Страница 41: ... Update Sources o Asynchronous o Internal Pacer o External TTL Max update rate channel 100khz Waveform Triggering o Software Command o External Trigger TTL Output Current 5 mA Digital Inputs Outputs Channels 24 accessible from main I O connector Ports 3x8 bit Ports I O Direction Select Software selectable per three 8 bit ports Ports A B and C Input Level 5 0V 3 3V CMOS LSTTL compatible with 4 7 K ...

Страница 42: ...s Frequency Pulse Generators 2 Timers designated as TMR0 and TMR1 Channels 2 Pin Connections TMR0 SCSI 68 Pin 3 Shared with ADTRGOUT TB 100 Option Connector TMR0 Shared with ADTRGOUT TMR1 SCSI 68 Pin 37 Shared with ADCLKOUT TB 100 Option Connector TMR1 Shared with ADCLKOUT Output Rates 7 6 Hz to 500 Khz 50 Duty Cycle Square Wave Output Levels 5 V CMOS TTL with 4 7 K ohm pull up resistor High Level...

Страница 43: ...e interaction between the two stages Also see Buffer Channel In reference to Daq devices channel simply refers to a single input or output entity In a broader sense an input channel is a signal path between the transducer at the point of measurement and the data acquisition system A channel can go through various stages buffers multiplexers or signal conditioning amplifiers and filters Input chann...

Страница 44: ... have a nonlinear response To convert nonlinear signals into accurate readings requires software to calibrate several points in the range used and then interpolate values between these points Multiplexer MUX A device that collects signals from several inputs and outputs them on a single channel Sample reading The value of a signal on a channel at an instant in time When triggered the ADC reads the...

Страница 45: ...Notes ...

Страница 46: ...Notes ...

Страница 47: ...otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans...

Страница 48: ...ne Paddlewheel Systems 䡺 Totalizers Batch Controllers pH CONDUCTIVITY 䡺 pH Electrodes Testers Accessories 䡺 Benchtop Laboratory Meters 䡺 Controllers Calibrators Simulators Pumps 䡺 Industrial pH Conductivity Equipment DATA ACQUISITION 䡺 Data Acquisition Engineering Software 䡺 Communications Based Acquisition Systems 䡺 Plug in Cards for Apple IBM Compatibles 䡺 Datalogging Systems 䡺 Recorders Printer...

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