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Principles of Operation

69

Converting a Voltage to a Twos Complement Code

To convert a voltage into a twos complement code on the DT9812-10V, DT9812-10V-OEM,
DT9812A, DT9813-10V, DT9813A, DT9814-10V, or DT9814A module, use the following
formula:

Code = Voltage



(20 / 4096)

where,

• 20 is the full-scale range of the module (-10V to +10V)

• 4096 is the resolution (12 bits)

•

Voltage

is the analog output voltage

•

Code

is the raw count used by the software to represent the voltage in binary notation

For example, if you want to output a voltage of



5 V, determine the code as follows:

Code = 5/ (20 / 4096)

=

1024

Error Conditions

The modules can report an underrun error if the data for the analog output channels is not
sent fast enough from the host computer. It is up to the host application to handle this error
either by ignoring it or by stopping the output operation.

To avoid this error, try slowing down the clock rate, increasing the output buffer size, or
allocating more output buffers.

Note:

If no new data is available to be output by the analog output channels, the last value

that was written to the analog output channels continues to be output.

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Содержание DT9812 Series

Страница 1: ...DT9812 UM 20769 R DT9813 and User s Manual DT9814 Series Title Page ...

Страница 2: ...atent rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke D...

Страница 3: ...ions to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing...

Страница 4: ......

Страница 5: ...necting to an Expansion Hub 23 Changing the Name of a Module Optional 25 Chapter 3 Wiring Signals to the Module 27 Preparing to Wire Signals 29 Wiring Recommendations 29 Wiring Signals to a DT9812 2 5V DT9812 10V DT9812A DT9813 10V DT9813A DT9814 10V or DT9814A Module 29 Wiring Signals to the DT9812 10V OEM Module 32 Connecting Analog Input Signals 34 Connecting Analog Output Signals 35 Connecting...

Страница 6: ... Single Analog Input Channel 59 Specifying One or More Analog Input Channels 59 Input Ranges and Gains 60 Input Sample Clock Sources 61 Analog Input Conversion Modes 62 Single Value Operations 62 Continuous Scan Mode 62 Input Triggers 63 Data Transfer 63 Data Format 63 Converting a Binary Code to a Voltage 63 Converting a Twos Complement Code to a Voltage 64 Error Conditions 64 Analog Output Featu...

Страница 7: ...les 72 Counter Timer Operation Modes 73 Event Counting 73 Frequency Measurement 73 Edge to Edge Measurement 74 Rate Generation 74 Chapter 6 Supported Device Driver Capabilities 77 Data Flow and Operation Options 79 Buffering 80 Triggered Scan Mode 80 Data Encoding 80 Channels 81 Gain 81 Ranges 82 Resolution 82 Thermocouple and RTD Support 83 IEPE Support 83 Triggers 84 Clocks 85 Counter Timers 86 ...

Страница 8: ...ions 104 Digital I O Specifications 106 Counter Timer Specifications 107 External Trigger Specifications 108 External Clock Specifications 109 Power Physical and Environmental Specifications 110 Regulatory Specifications 111 Mating Connector Specifications 112 Appendix B Screw Terminal and Connector Pin Assignments 113 Screw Terminal Assignments 114 DT9812 2 5V DT9812 10V and DT9812A Screw Termina...

Страница 9: ...12 Series is used Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming the modules for data acquisition operations in the Microsoft Windows XP Windows Vista or Windows 7 operating system It is assumed that you have some familiarity with data acquisition principles and that you understand your application How this Manual...

Страница 10: ...the Universal Serial Bus for Data Acquisition This white paper describes why USB is an attractive alternative for data acquisition It is available on the Data Translation web site www datatranslation com Measure Foundry Manual UM 19298 and online help These documents describe how to use Measure Foundry to build drag and drop test and measurement applications for Data Translation data acquisition d...

Страница 11: ...rogramming language to access the capabilities of Data Translation data acquisition devices Microsoft Windows XP Windows Vista or Windows 7 documentation USB web site http www usb org Where To Get Help Should you run into problems installing or using a module the Data Translation Technical Support Department is available to provide technical assistance Refer to Chapter 7 starting on page 89 for mo...

Страница 12: ...About this Manual 12 ...

Страница 13: ...13 1 Overview Key Hardware Features 14 Supported Software 15 Getting Started Procedure 16 ...

Страница 14: ...nal and external A D clock sources Internal and external A D trigger sources No external power supply required Table 1 Key Features of the DT9812 DT9813 and DT9814 Series Modules Module Analog Inputs Analog Outputs I O Range Analog Input Sample Rate Analog Output Update Rate Digital I O DT9812 2 5V 8 SE 2 0 to 2 44 V 50 kS s 50 kS s 8 in 8 out DT9812 10V and DT9812 10V OEMa a The DT9812 10V OEM is...

Страница 15: ... DT9812 DT9813 or DT9814 Series module using Visual Studio 2003 or Visual Studio 2005 the class library complies with the DT Open Layers standard DataAcq SDK Use the Data Acq SDK if you want to use Visual Studio 6 0 and Microsoft C or C to develop your own application software for a DT9812 DT9813 or DT9814 Series module using Windows XP Windows Vista or Windows 7 the DataAcq SDK complies with the ...

Страница 16: ...m is repeated in each chapter the shaded area in the diagram shows you where you are in the getting started procedure Figure 1 Getting Started Flow Diagram Set Up and Install the Module see Chapter 2 starting on page 19 Wire Signals to the Module see Chapter 3 starting on page 27 Verify the Operation of the Module see Chapter 4 starting on page 43 ...

Страница 17: ...Part 1 Getting Started ...

Страница 18: ......

Страница 19: ...19 2 Setting Up and Installing the Module Unpacking 21 Attaching Modules to the Computer 22 Changing the Name of a Module Optional 25 ...

Страница 20: ...Chapter 2 20 Set Up and Install the Module this chapter Wire Signals to the Module see Chapter 3 starting on page 27 Verify the Operation of the Module see Chapter 4 starting on page 43 ...

Страница 21: ... at 508 481 3700 ext 1323 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com Note The DT9812 DT9813 and DT9814 Series modules are factory calibrated The DT9812 2 5V module requires no further adjustment If yo...

Страница 22: ...ngle USB port by using expansion hubs For more information refer to page 23 You can unplug a module and then plug it in again if you wish without causing damage This process is called hot swapping Your application may take a few seconds to recognize a module once it is plugged back in You must install the device driver before connecting your module to the host computer Connecting Directly to the U...

Страница 23: ...s are powered by their own external power supply The practical number of DT9812 DT9813 and or DT9814 Series modules that you can connect to a single USB port depends on the throughput you want to achieve To connect multiple modules to an expansion hub do the following 1 Attach one end of the USB cable to the module and the other end of the USB cable to an expansion hub 2 Connect the power supply f...

Страница 24: ...umber of expansion hubs up to five and modules up to four per hub that you require Refer to Figure 3 The operating system automatically detects the USB devices as they are installed Figure 3 Attaching Multiple DT9812 DT9813 and or DT9814 Series Modules Using Expansion Hubs USB Cable Expansion Hubs Host Computer Power Supply for Hub USB Cables USB Cables USB Cable Power Supply for Hub DT9812 DT9813...

Страница 25: ...Panel dialog box appears 3 Click the DT9812 DT9813 or DT9814 Series module that you want to rename and then click Edit Name 4 Enter a new name for the module and then click OK The name is used to identify the module in all subsequent applications 5 When you are finished configuring the module click Close 6 Repeat steps 3 to 5 for the other modules that you want to configure 7 Close the Data Acquis...

Страница 26: ...Chapter 2 26 ...

Страница 27: ...7 3 Wiring Signals to the Module Preparing to Wire Signals 29 Connecting Analog Input Signals 34 Connecting Analog Output Signals 35 Connecting Digital I O Signals 36 Connecting Counter Timer Signals 39 ...

Страница 28: ...Chapter 3 28 Set Up and Install the Module see Chapter 2 starting on page 19 Wire Signals to the Module this chapter Verify the Operation of the Module see Chapter 4 starting on page 43 ...

Страница 29: ...tatic discharge to the I O while the box is operational Connect all unused analog input channels to analog ground Wiring Signals to a DT9812 2 5V DT9812 10V DT9812A DT9813 10V DT9813A DT9814 10V or DT9814A Module For the DT9812 2 5V DT9812 10V DT9812A DT9813 10V DT9813A DT9814 10V and DT9814A modules you wire signals to the screw terminals on the module Table 2 lists the screw terminal assignments...

Страница 30: ...2 44 V Table 3 DT9813 10V and DT9813A Screw Terminal Assignments Screw Terminal Signal Screw Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Input 3 16 Counter 0 Gate 36 Digital Input 2 15 Ground 35 Digital Input 1 14 DAC 1 34 Digital Input 0 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 3...

Страница 31: ...nalog Input CH22 15 Ground 35 Analog Input CH21 14 DAC 1 34 Analog Input CH20 13 DAC 1 Return 33 Analog Input CH19 12 DAC 0 32 Analog Input CH18 11 DAC 0 Return 31 Analog Input CH17 10 2 5 V Reference 30 Analog Input CH16 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 Analog Inp...

Страница 32: ...nector on the DT9812 10V OEM module Table 5 Analog I O Connector Pin Assignments on the DT9812 10V OEM Module Pin Signal Pin Signal 20 USB 5 V Out 19 Ground 18 Counter 0 In 17 Counter 0 Out 16 Counter 0 Gate 15 Ground 14 DAC 1 13 DAC 1 Return 12 DAC 0 11 DAC 0 Return 10 2 5 V Reference 9 Analog Ground 8 Analog Input CH7 7 Analog Input CH6 6 Analog Input CH5 5 Analog Input CH4 4 Analog Input CH3 3 ...

Страница 33: ...10V OEM Module Pin Signal Pin Signal 20 Ext Trigger 19 Ext Clock 18 Ground 17 Digital Output 7 16 Digital Output 6 15 Digital Output 5 14 Digital Output 4 13 Digital Output 3 12 Digital Output 2 11 Digital Output 1 10 Digital Output 0 9 Ground 8 Digital Input 7 7 Digital Input 6 6 Digital Input 5 5 Digital Input 4 4 Digital Input 3 3 Digital Input 2 2 Digital Input 1 1 Digital Input 0 ...

Страница 34: ...9814 10V and DT9814A support 24 single ended analog input channels Figure 5 shows how to connect single ended voltage input signals channels 0 and 1 in this case to the module Figure 5 Connecting Single Ended Analog Inputs Signal Source Vsource 1 2 1 Analog In 1 Analog In 0 Vsource 0 Analog Ground 9 DT9812 DT9813 or DT9814 Series Module For the DT9812 10V OEM module connect to the Analog I O conne...

Страница 35: ...ort two analog output channels DAC0 and DAC1 Figure 6 shows how to connect an analog output voltage signal DAC0 in this case to one of these modules Figure 6 Connecting Analog Outputs DAC0 Load DAC0 Return 12 11 DT9812 DT9813 or DT9814 Series Module For the DT9812 10V OEM module connect to the Analog I O connector ...

Страница 36: ...es to these modules Connecting Digital Input Lines Figure 7 shows how to connect digital input signals lines 0 and 1 in this case to a DT9812 2 5V DT9812 10V or DT9812A module Figure 7 Connecting Digital Inputs to the DT9812 2 5V DT9812 10V or DT9812A Module Figure 8 shows how to connect digital input signals lines 0 and 1 to a DT9812 10V OEM module Figure 8 Connecting Digital Inputs to the DT9812...

Страница 37: ... case to a DT9812 2 5V DT9812 10V DT9812A DT9813 10V or DT9813A module Figure 10 Connecting Digital Outputs to the DT9812 2 5V DT9812 10V DT9812A DT9813 10V or DT9813A Module Note While the DT9812 Series modules have 8 digital outlines the DT9813 10V module has only four digital output lines screw terminals 30 through 33 Digital Input 1 35 Digital Input 0 Ground TTL Inputs 34 DT9813 10V or DT9813A...

Страница 38: ...ws how to connect a digital output signal to a DT9812 10V OEM module Figure 11 Connecting Digital Outputs to the DT9812 10V OEM Module DT9812 10V OEM Module Digital Output 0 Ground 500 5 V Out LED On 10 18 Digital I O Connector ...

Страница 39: ...n event counting operation using an external gate In this example the counter counts the number of rising edges that occur on the Counter 0 In signal when the Counter 0 Gate signal is in the active state as specified by software Refer to page 73 for more information Figure 12 Connecting Counter Timer Signals for an Event Counting Operation Using an External Gate Figure 13 shows how to connect coun...

Страница 40: ...Counter 0 In signal is the number of counts divided by the period of the signal connected to the Counter 0 Gate input Figure 14 Connecting Counter Timer Signals for a Frequency Measurement Operation Using an External Pulse Signal Source Counter 0 In Ground 18 19 DT9812 DT9813 or DT9814 Series Module Counter 0 In Number of pulses counted during gate period Counter 0 Gate Determines period for count...

Страница 41: ... to measure the following characteristics of a signal Pulse width The amount of time that a signal pulse is in a high or a low state or the amount of time between a rising edge and a falling edge or between a falling edge and a rising edge You can calculate the pulse width as follows Pulse width Number of counts 24 MHz Period The time between two occurrences of the same edge rising edge to rising ...

Страница 42: ... generation continuous pulse output operation in this example an external gate is used Figure 16 Connecting Counter Timer Signals for a Rate Generation Operation Using an External Gate Heater Controller Ground Counter 0 Out Ground External Gating Switch 17 16 Counter 0 Gate 19 DT9812 DT9813 or DT9814 Series Module ...

Страница 43: ...aAcq Application 45 Testing Single Value Analog Input 46 Testing Single Value Analog Output 47 Testing Continuous Analog Input 48 Testing Single Value Digital Input 49 Testing Single Value Digital Output 50 Testing Frequency Measurement 51 Testing Pulse Output 52 ...

Страница 44: ...Chapter 4 44 Set Up and Install the Module see Chapter 2 starting on page 19 Wire Signals to the Module see Chapter 3 starting on page 27 Verify the Operation of the Module this chapter ...

Страница 45: ... to Programs Data Translation Inc DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features For information on each of the features provided use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu If the...

Страница 46: ...DataAcq application choose Single Analog Input from the Acquisition menu 3 Select the appropriate DT9812 DT9813 or DT9814 Series module from the Board list box 4 In the Channel list box select analog input channel 0 5 In the Range list box select the range for the channel 0 to 2 44 V for the DT9812 2 5V and 10 V for the DT9812 10V DT9812 10V OEM DT9812A DT9813 10V DT9813A DT9814 10V and DT9814A 6 ...

Страница 47: ... the Control menu 3 Select the appropriate DT9812 DT9813 or DT9814 Series module from the Board list box 4 In the Channel list box select analog output channel 0 5 In the Range list box select the output range of DAC0 0 to 2 44 V for the DT9812 2 5V and 10 V for the DT9812 10V DT9812 10V OEM DT9812A DT9813 10V DT9813A DT9814 10V and DT9814A 6 Enter an output value or use the slider to select a val...

Страница 48: ...o the channel list Note that by default channel 0 is included in the channel list 6 Click Config from the Toolbar 7 In the Config dialog select ChannelType and then select Single Ended 8 In the Config dialog select Range and then select Unipolar for the DT9812 2 5V or Bipolar for the DT9812 10V DT9812 10V OEM DT9812A DT9813 10V DT9813A DT9814 10V and DT9814A 9 From the Scope view double click the ...

Страница 49: ...or DT9813 Series module Refer to page 36 for an example of how to connect a digital input 2 In the Quick DataAcq application choose Digital Input from the Acquisition menu 3 Select the appropriate DT9812 or DT9813 Series module from the Board list box 4 Select digital input port A by clicking Port A 5 Click Get The application displays the value of each digital input line in port A on the screen i...

Страница 50: ... appropriateDT9812 or DT9813 Series module from the Board list box 4 Select digital output port B by clicking Port B 5 Click the appropriate bits to select the type of signal to write from the digital output lines If the bit is selected a high level signal is output from the digital output line if the bit is not selected a low level signal is output from the digital output line Optionally you can ...

Страница 51: ...tion works only with counter timer 0 2 In the Quick DataAcq application choose Frequency Counter from the Acquisition menu 3 Select the appropriate DT9812 DT9813 or DT9814 Series module from the Board list box 4 In the Count Duration text box enter the number of seconds during which events will be counted 5 Click Start to start the frequency measurement operation The operation automatically stops ...

Страница 52: ... counter timer 0 2 In the Quick DataAcq application choose Pulse Generator from the Control menu 3 Select the appropriate DT9812 DT9813 or DT9814 Series module from the Board list box 4 Select Continuous to output a continuous pulse stream 5 Select High to low to output a falling edge pulse the low portion of the total pulse output period is the active portion of the signal 6 Click Start to genera...

Страница 53: ...Part 2 Using Your Module ...

Страница 54: ......

Страница 55: ...55 5 Principles of Operation Analog Input Features 59 Analog Output Features 65 Digital I O Features 70 Counter Timer Features 71 ...

Страница 56: ...erence A D Ch2 A D Ch3 A D Ch1 A D Ch0 12 Bit D A Converter 12 Bit A D Converter DAC 1 DAC 0 From USB Port Power Supply 32 Bit Counter Timer C T Out 0 C T Gate 0 C T In 0 A D Clock External Clock External Trigger Digital I O DOUT7 DOUT0 DIN7 DIN0 USB 2 0 or 1 1 Port Input FIFO 5 V ESD Protected to 4000 V ESD Protected to 4000 V Note For the DT9812 10V DT9812 10V OEM and DT9812A modules the referen...

Страница 57: ...14 A D Ch15 A D Ch13 16 Channel Multiplexer 2 5 V Reference A D Ch2 A D Ch1 A D Ch0 12 Bit D A Converter 12 Bit A D Converter DAC 1 DAC 0 From USB Port Power Supply 32 Bit Counter Timer C T Out 0 C T Gate 0 C T In 0 A D Clock External Clock External Trigger Digital I O DOUT3 DOUT0 DIN3 DIN0 USB 2 0 Port Input FIFO 5 V ESD Protected to 4000 V ESD Protected to 4000 V ...

Страница 58: ...les A D Ch22 A D Ch23 A D Ch21 24 Channel Multiplexer 2 5 V Reference A D Ch2 A D Ch1 A D Ch0 12 Bit D A Converter 12 Bit A D Converter DAC 1 DAC 0 From USB Port Power Supply 32 Bit Counter Timer C T Out 0 C T Gate 0 C T In 0 A D Clock External Clock External Trigger USB 2 0 Port Input FIFO 5 V ESD Protected to 4000 V ESD Protected to 4000 V ...

Страница 59: ...nd DT9813A modules provides 16 single ended analog inputs The DT9814 10V and DT9814A modules provide 24 single ended analog input channels The modules can acquire data from a single analog input channel or from a group of analog input channels The following subsections describe how to specify the channels Specifying a Single Analog Input Channel The simplest way to acquire data from a single analo...

Страница 60: ...input ranges Table 7 lists the supported gains and effective input ranges for each module For each channel on the module choose the gain that has the smallest effective range that includes the signal you want to measure For example if you are using a DT9812 2 5V module and the range of your analog input signal is 0 to 1 05 V specify a range of 0 to 2 44 V for the module and use a gain of 2 for the...

Страница 61: ...nnel if the maximum sample rate is 50 kSamples s for the device or 6 25 kSamples s for each channel if the maximum sample rate is 100 kSamples s for the device According to sampling theory Nyquist Theorem specify a frequency that is at least twice as fast as the input s highest frequency component For example to accurately sample a 2 kHz signal specify a sampling frequency of at least 4 kHz Doing ...

Страница 62: ... the channel list and repeats the process continuously until either the allocated buffers are filled or until you stop the operation Refer to page 63 for more information about buffers The conversion rate is determined by the frequency of the internal sample clock refer to page 61 for more information about the internal sample clock The sample rate which is the rate at which a single entry in the ...

Страница 63: ...ta you must allocate buffers to hold the data A buffer done event is returned whenever a buffer is filled This allows you to move and or process the data as needed We recommend that you allocate a minimum of two buffers for a continuous analog input operation Data is written to multiple allocated input buffers continuously when no more empty buffers are available the operation stops The data is ga...

Страница 64: ...re to represent the voltage 4096 is the input resolution 12 bits Voltage is the analog voltage For example assume that the software returns a code of 1040 for the analog input value Determine the analog input voltage as follows Voltage 20 1040 4096 5 078 V Error Conditions An overrun condition is reported if the A D sample clock rate is too fast This error is reported if a new A D sample clock pul...

Страница 65: ... how to specify the channels Specifying a Single Analog Output Channel The simplest way to output data from a single analog output channel is to use single value analog output mode specifying the analog output channel that you want to update refer to page 67 for more information about single value operations You can also specify a single analog output channel using the output channel list describe...

Страница 66: ...D A subsystem as a software trigger Output Clock When in continuous output mode described on page 67 you can update both analog output channels simultaneously using the internal clock on the module Using software specify the clock source for the D A subsystem as internal and specify the frequency at which to update the analog output channels For the DT9812 10V DT9812 10V OEM DT9813 10V DT9814 10V ...

Страница 67: ...ceives the software trigger the module starts writing output values to the analog output channels specified in the output channel list The operation repeats continuously until no more buffers are on the subsystem queue or you stop the operation Refer to page 68 for more information about buffer modes Note Make sure that the host computer transfers data to the analog output channels fast enough so ...

Страница 68: ... result if your buffer size is too small if you do not allocate enough buffers or if your clock rate is too fast Data Format The DT9812 2 5V module uses binary data encoding The DT9812 10V DT9812 10V OEM DT9812A DT9813 10V DT9813A DT9814 10V and DT9814A modules use twos complement encoding In software you need to supply a code that corresponds to the analog output value you want the module to outp...

Страница 69: ...binary notation For example if you want to output a voltage of 5 V determine the code as follows Code 5 20 4096 1024 Error Conditions The modules can report an underrun error if the data for the analog output channels is not sent fast enough from the host computer It is up to the host application to handle this error either by ignoring it or by stopping the output operation To avoid this error try...

Страница 70: ...o page 70 for more information about single value operations A digital line is high if its value is 1 a digital line is low if its value is 0 On power up or reset a low value 0 is output from each of the digital output lines Resolution The resolution of the digital ports on the DT9812 Series modules is fixed at 8 bits The resolution of the digital ports on the DT9813 Series modules is fixed at 4 b...

Страница 71: ...rnal and specify the frequency at which to pace the counter timer operation The frequency of the internal C T clock can range from 15 Hz to 12 MHz External clock An external clock is useful when you want to pace counter timer operations at rates not available with the internal clock or if you want to pace at uneven intervals Connect an external clock with a maximum recommended frequency of 6 MHz t...

Страница 72: ...pe Note that this gate type is used for edge to edge measurement mode refer to page 74 for more information about these modes Rising edge external gate input Enables a counter timer operation when a low to high transition is detected on the Counter 0 Gate signal In software this is called a high edge gate type Note that this gate type is used for edge to edge measurement operations refer to page 7...

Страница 73: ...use software to specify the counter timer mode as count the C T clock source as external and the active gate type as software or high level Make sure that the signals are wired appropriately Refer to page 39 for an example of connecting an event counting application Frequency Measurement Connect a pulse of a known duration to the Counter 0 Gate signal Specify the active gate in software high level...

Страница 74: ...ween two occurrences of the same edge rising edge to rising edge or falling edge to falling edge You can calculate the period as follows Period 1 Frequency Period Number of counts 24 MHz Frequency The number of periods per second You can calculate the frequency as follows Frequency 24 MHz Number of Counts Using software specify the counter timer mode as measure the C T clock source as internal the...

Страница 75: ...the C T clock source as either internal or external the clock divider 2 to 65536 and the active gate type high level or software gate Refer to page 72 for more information about gate types Make sure that the signals are wired appropriately Refer to page 42 for an example of connecting a rate generation application ...

Страница 76: ...Chapter 5 76 ...

Страница 77: ... Driver Capabilities Data Flow and Operation Options 79 Buffering 80 Triggered Scan Mode 80 Gain 81 Channels 81 Ranges 82 Resolution 82 Thermocouple and RTD Support 83 IEPE Support 83 Triggers 84 Clocks 85 Counter Timers 86 ...

Страница 78: ...bility is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or DT Open Layers for NET Class Library User s Manual Table 8 DT9812 DT9813 and DT9814 Series Subsystems DT9812 DT9813...

Страница 79: ...s Yes Yes Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Yes Supports Programmable Synchronization Modes SupportsSynchronization Synchronization Modes SynchronizationMode Interrupt ...

Страница 80: ... Support SupportsTriggeredScan Maximum Number of CGL Scans per Trigger MaxMultiScanCount 1 0 0 0 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 0 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 0 0 0 0 0 Table 12 DT9812 DT9813 and DT9814 Series Data Encoding Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Binary Encoding Support SupportsBinaryEncoding Yesa a The DT9812...

Страница 81: ...4 Series module do not support the DOUT subsystem 1 0 SE Support SupportsSingleEnded Yes Yes SE Channels MaxSingleEndedChannels 8 16 or 24a 2 0 0 0 0 DI Support SupportsDifferential Yes Yes Yes DI Channels MaxDifferentialChannels 0 or 1b 0 or 1c 1 0 Maximum Channel Gain List Depth CGLDepth 8 16 or 24a 2 1 1 1 0 Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibi...

Страница 82: ...VoltageRanges 0 to 2 44 V or 10 Va 0 to 2 44 V or 10 Va Current Output Support SupportsCurrentOutput Table 16 DT9812 DT9813 and DT9814 Series Resolution Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1a a All modules support a fixed A D and D A resolution of 12 bits 1a 1b b The ...

Страница 83: ...hannel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType Table 18 DT9812 DT9813 and DT9814 Series IEPE Support Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Software Programmab...

Страница 84: ...igger Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negative TTL Trigger Support for Single Value Operations SupportsSvNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Negative Threshold Trigger Support SupportsNegThresholdTrig...

Страница 85: ... 100 kHza a For the DT9812 2 5V DT9812 10V DT9812 10V OEM DT9813 10V and DT9814 10V the maximum A D frequency of the internal clock is 50 kHz For the DT9812A DT9813A and DT9814A the maximum A D frequency of the internal clock is 100 kHz For the DT9812 2 5V DT9812 10V DT9812 10V OEM DT9813 10V and DT9814 10V the maximum A D frequency of the external clock is 40 kHz For the DT9812A DT9813A and DT981...

Страница 86: ...s Edge to Edge Measurement Mode Support SupportsContinuousMeasure High to Low Output Pulse Support SupportsHighToLowPulse Yes Low to High Output Pulse Support SupportsLowToHighPulse Variable Pulse Width Support SupportsVariablePulseWidth Noa None internal Gate Type Support SupportsGateNone Yes High Level Gate Type Support SupportsGateHighLevel Yes Low Level Gate Type Support SupportsGateLowLevel H...

Страница 87: ...pportsInterrupt Yes a The pulse width duty cycle if fixed at 50 when rate generation mode is used b Edge to edge measurement is supported on the gate signal only both rising and falling edges Table 21 DT9812 DT9813 and DT9814 Series Counter Timer Options cont DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD ...

Страница 88: ...Chapter 6 88 ...

Страница 89: ...89 7 Troubleshooting General Checklist 90 Technical Support 92 If Your Module Needs Factory Service 93 ...

Страница 90: ...f you still experience problems try using the information in Table 22 to isolate and solve the problem If you cannot identify the problem refer to page 90 Table 22 Troubleshooting Problems Symptom Possible Cause Possible Solution Module is not recognized You plugged the module into your computer before installing the device driver From the Control Panel System Hardware Device Manager uninstall any...

Страница 91: ...hapter 3 The module is out of calibration The modules are calibrated at the factory The DT9812 2 5V does not require additional calibration If you want to readjust the calibration of any other DT9812 DT9813 or DT9814 Series module refer to the instructions in Chapter 8 Computer does not boot The power supply of the computer is too small to handle all the system resources Check the power requiremen...

Страница 92: ...n com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and telepho...

Страница 93: ...your nearest distributor are listed on our web site www datatranslation com All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the module in an electrically conductive plastic material Handle with ground protection A static discharge can destroy compon...

Страница 94: ...Chapter 7 94 ...

Страница 95: ...95 8 Calibration Using the DT9812 Series Calibration Utility 97 Calibrating the Analog Input Subsystem 98 Calibrating the Analog Output Subsystem 100 ...

Страница 96: ...e modules every six months using the DT9812 Series Calibration Utility Note The DT9812 2 5V module is calibrated at the factory and does not require further calibration Ensure that you installed the DT9812 DT9813 or DT9814 Series Device Driver prior to using the DT9812 Series Calibration Utility This chapter describes how to calibrate the analog input and output subsystems of the DT9812 10V DT9812...

Страница 97: ... Translation Inc ECONseries Calibration DT9812 Series Calibration Utility The main menu appears 2 Select the module to calibrate and then click OK Once the DT9812 Series Calibration Utility is running you can calibrate the analog input circuitry either automatically or manually described on page 98 or the analog output circuitry of the module described on page 100 ...

Страница 98: ... supplied voltage to AD Ch0 is 0V and then click OK The offset value is calibrated When the offset calibration is complete a message appears notifying you to set the input voltage of AD Ch 0 to 9 375 V 5 Check that the supplied voltage to AD Ch0 is 9 375V and then click OK The gain value is calibrated 6 Click OK to finalize the analog input calibration process Note At any time you can click Restor...

Страница 99: ...hannel is displayed in the A D Value window b Adjust the gain by entering values between 0 and 63 in the Gain edit box or by clicking the up down buttons until the A D Value is 9 3750 Note At any time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings ...

Страница 100: ... Output 0 DAC Ch0 of the module 3 Adjust the offset by entering values between 0 and 63 in the DAC 0 Offset edit box or by clicking the up down buttons until the voltmeter reads 0 V 4 Connect an external precision voltmeter to Analog Output 1 DAC Ch1 of the module 5 Adjust the offset by entering values between 0 and 63 in the DAC 1 Offset edit box or by clicking the up down buttons until the voltm...

Страница 101: ...pecifications 104 Digital I O Specifications 106 Counter Timer Specifications 107 External Trigger Specifications 108 External Clock Specifications 109 Power Physical and Environmental Specifications 110 Regulatory Specifications 111 Mating Connector Specifications 112 ...

Страница 102: ...os complement twos complement System accuracy to of FSR Averaged over 50 readings Gain 1 Gain 2 Gain 4 Gain 8 Gain 16 0 04 0 06 0 08 0 10 0 15 0 04 0 06 0 08 0 10 0 04 0 06 0 08 0 10 Input Range Gain 1 Gain 2 Gain 4 Gain 8 Gain 16 0 to 2 44 V 0 to 1 22 V 0 to 0 610 V 0 to 0 305 V 0 to 0 1525 V 10 V 5 V 2 5 V 1 25 V 10 V 5 V 2 5 V 1 25 V Nonlinearity 0 05 0 05 0 05 Differential nonlinearity 1 2 LSB...

Страница 103: ... at 50 kHz with a 1 kHz sine wave 10 5 bits 10 5 bits 10 5 bits Total Harmonic Distortion 70 dB 1 kHz 70 dB 1 kHz 70 dB 1 kHz Channel Crosstalk 74 dB 1 kHz 74 dB 1 kHz 74 dB 1 kHz Maximum A D Pacer Clock Single Analog Input Throughput Multiple Analog Input Throughput 50 kHz 50 kHz 50 kHz 50 kHz 100 kHz 100 kHz a Very high input impedance minimizes any source error b To avoid overrun and underrun e...

Страница 104: ...ity LSB 1 LSB 1 LSB Inherent quantizing error 1 LSB 1 LSB 1 LSB Output range 0 to 2 44 V 10 V 10 V Error Zero Gain 1 mV 0 1 4 mV 0 2 4 mV 0 2 Drift Zero bipolar Gain 20 V C 100 ppm 100 V C 100 ppm 100 V C 100 ppm Throughput Continuously paced analog output mode 50 kHz 50 kHz 75 kHza Current output 2 mA 2 mA 2 mA Output impedance 200 0 2 0 2 Capacitive driver capability 1000 pF minimum 1000 pF mini...

Страница 105: ... Yes No a To avoid overrun and underrun errors it is recommended that you do not run both the A D and D A subsystems at the same time using the maximum frequencies Table 24 Analog Output Specifications cont Feature DT9812 2 5V Specifications DT9812 10V DT9812 10V OEM DT9813 10V DT9814 10V Specifications DT9812A DT9813A DT9814A Specifications ...

Страница 106: ...9812 Series 16 8 in 8 out DT9813 Series 8 4 in 4 out Number of ports DT9812 Series 2 8 bit DT9813 Series 2 4 bit Input termination No Logic family TTL Logic sense Positive true Inputs Input type Input logic load High input voltage Low input voltage Low input current Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Outputs High output Low output High output current source Low output curren...

Страница 107: ...eration Resolution 32 bita a The resolution is 16 bits for rate generation operations Minimum pulse width minimum amount of time it takes a C T to recognize an input pulse 200 ns Logic family TTL Inputs Input logic load High input voltage Low input voltage Low input current Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Outputs High output Low output High output current source Low outpu...

Страница 108: ...er Specifications Feature DT9812 Series DT9813 Series DT9814 Series Specifications Input type Low level or falling edge sensitive Logic family TTL Inputs Input logic load High input voltage Low input voltage Low input current Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Minimum pulse width High Low 200 ns 200 ns Triggering modes Single scan Continuous scan Yes Yes ...

Страница 109: ...ifications DT9812A DT9813A DT9814A Specifications Input type Rising edge sensitive Rising edge sensitive Logic family TTL TTL Inputs Input logic load Input termination High input voltage Low input voltage Low input current Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Oscillator frequency 40 kHz maximum 75 kHz maximum Minimum pu...

Страница 110: ... 5 V out pin 20 100 mA maximum 100 mA maximum Power 5 V Enumeration Operation 100 mA 100 mA 100 mA 175 mA Physical Dimensions board Dimensions box with screw terminals and feet Weight board Weight box with screw terminals and feet 100 mm L x 100 mm W x 15 5 mm H 107 7 mm L x 100 mm W x 33 5 mm H 65 3 g 138 4 g 100 mm L x 100 mm W x 15 5 mm H 107 7 mm L x 100 mm W x 33 5 mm H 65 3 g 138 4 g Environ...

Страница 111: ...trical Equipment for Measurement Control and Laboratory Use EMC Requirements EN61000 4 2 2001 Electrostatic Discharge ESD 4 kV contact discharge 8 kV air discharge 4 kV horizontal and vertical coupling planes EN61000 4 3 2002 Radiated electromagnetic fields 3 V m 80 to 1000 MHz 3 V m 1 4 GHz to 2 GHz 1 V m 2 GHz to 2 7 GHz EN61000 4 4 2004 Electrical Fast Transient Burst EFT 1 kV on data cables EN...

Страница 112: ...cations for the DT9812 10V OEM module Table 31 Mating Connector Specifications for the DT9812 10V OEM Module Connector on Module Mating Connector Specifications USB Connector Bulgin part 14193 USB cable Analog I O Connector J3 Tyco part 1658622 4 Digital I O Connector J4 Tyco part 1658622 4 ...

Страница 113: ...113 B Screw Terminal and Connector Pin Assignments ...

Страница 114: ... Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Output 7 16 Counter 0 Gate 36 Digital Output 6 15 Ground 35 Digital Output 5 14 DAC 1 34 Digital Output 4 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Referencea a For the DT9812 2 5V module this reference is 2 44 V 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Inp...

Страница 115: ...Input 3 16 Counter 0 Gate 36 Digital Input 2 15 Ground 35 Digital Input 1 14 DAC 1 34 Digital Input 0 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Reference 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Inp...

Страница 116: ...Gate 36 Analog Input CH22 15 Ground 35 Analog Input CH21 14 DAC 1 34 Analog Input CH20 13 DAC 1 Return 33 Analog Input CH19 12 DAC 0 32 Analog Input CH18 11 DAC 0 Return 31 Analog Input CH17 10 2 5 V Reference 30 Analog Input CH16 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 A...

Страница 117: ...DAC 1 Return 12 DAC 0 11 DAC 0 Return 10 2 5 V Reference 9 Analog Ground 8 Analog Input CH7 7 Analog Input CH6 6 Analog Input CH5 5 Analog Input CH4 4 Analog Input CH3 3 Analog Input CH2 2 Analog Input CH1 1 Analog Input CH0 Table 36 Digital I O Connector Pin Assignments on the DT9812 10V OEM Module Pin Signal Pin Signal 20 Ext Trigger 19 Ext Clock 18 Ground 17 Digital Output 7 16 Digital Output 6...

Страница 118: ...Appendix B 118 Table 37 lists the pin assignments for the USB 5 pin header Table 37 USB 5 Pin Header Pin Signal 1 5 V 2 D 3 D 4 Ground 5 Shield ...

Страница 119: ...l Panel 91 application wiring analog inputs 34 analog outputs 35 digital inputs and outputs 36 edge to edge measurement 41 event counting 39 frequency measurement 40 pulse output 42 B base clock frequency 85 BaseClockFrequency 85 binary data encoding 80 analog input 63 analog output 68 buffers 80 inprocess flush 80 single wrap mode 80 C C C programs 15 C T see counter timer 107 cables USB 22 23 ca...

Страница 120: ...2 edge to edge measurement mode 86 event counting 86 gate types 72 gate falling edge type 86 gate rising edge type 87 high edge gate type 86 high level gate type 86 high to low output pulse 86 internal gate type 86 interrupt driven operations 87 low edge gate type 86 rate generation mode 86 subsystem specifications 107 counting events 73 customer service 93 D D A see analog output 104 data encodin...

Страница 121: ...ge 86 high level 86 internal 86 low edge 86 gate falling edge type 86 gate rising edge type 87 generating pulses 74 H hardware features 14 header USB connector 118 help online 45 high edge gate type 86 high level gate type 86 hot swapping 22 I inprocess buffers 80 input channels 59 ranges 60 sample clock sources 61 internal clock 71 85 gate type 86 interrupt driven operations 87 interrupts 79 L La...

Страница 122: ...29 pulse output 42 rate generation 74 testing 52 types 72 pulse width 41 72 74 Q Quick Data Acq 15 running 45 quickDAQ 15 R ranges analog input 60 analog output 66 number of 82 rate generation 74 86 recommendations for wiring 29 resolution analog input 59 analog output 65 available 82 digital I O 70 number of 82 retrigger clock frequency 80 returning boards to the factory 93 RMA 93 running the Qui...

Страница 123: ...SingleEnded 81 SupportsSingleValue 79 SupportsSoftwareTrigger 84 SupportsTwosCompEncoding 80 SupportsWrapSingle 80 T technical support 92 throughput maximum 85 minimum 85 transferring data analog input 63 analog output 68 triggered scan number of scans per trigger 80 retrigger frequency 80 triggers analog input 63 external 63 external negative digital 84 external positive digital 84 software 63 66...

Страница 124: ...Index 124 writing programs in C C 15 Visual Basic 15 Visual Basic NET 15 Visual C 15 Visual C 15 ...

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