Related Manuals for Omega OMB-DAQ-2408 Series
Summary of Contents for Omega OMB-DAQ-2408 Series
- Page 1 User’ s Guide Extended Warranty Program Shop online at omega.com e-mail: info@omega.com For latest product manuals: omegamanual.info OMB-DAQ-2408 SERIES Multifunction USB Data Acquisition Modules...
- Page 2 For Other Locations Visit omega.com/worldwide The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications.
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Page 3: Table Of Contents
Introducing the OMB-DAQ-2408 Series ....................6 Overview: OMB-DAQ-2408 Series features ...................... 6 OMB-DAQ-2408 Series block diagram ......................7 Chapter 2 Installing a OMB-DAQ-2408 Series Device ..................8 What comes with your shipment? ........................8 Hardware ..................................8 Documentation .................................. 8 Unpacking................................ - Page 4 OMB-DAQ-2408 Series User's Guide Analog input/output calibration ........................27 Digital input/output............................27 Counter ................................28 Memory ................................29 Microcontroller ..............................29 Power ................................29 USB specifications ............................29 Environmental ..............................30 Mechanical ............................... 30 Screw terminal connector type and pinout ....................... 30...
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Page 5: About This User's Guide
Preface About this User's Guide What you will learn from this user's guide This user's guide describes the Omega Engineering OMB-DAQ-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. -
Page 6: Introducing The Omb-Daq-2408 Series
These devices are USB 2.0 high-speed devices supported under popular Microsoft Windows operating systems. The OMB-DAQ-2408 Series is compatible with both USB 1.1 and USB 2.0 ports, although the speed of the module maybe limited when using USB 1.1 ports. Each OMB-DAQ-2408 Series device provides the following features: ... -
Page 7: Omb-Daq-2408 Series Block Diagram
OMB-DAQ-2408 Series User's Guide Introducing the OMB-DAQ-2408 Series OMB-DAQ-2408 Series block diagram OMB-DAQ-2408 Series functions are illustrated in the block diagram shown here. Figure 1. OMB-DAQ-2408 Series functional block diagram... -
Page 8: Installing A Omb-Daq-2408 Series Device
As with any electronic device, take care while handling to avoid damage from static electricity. Before removing the OMB-DAQ-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. -
Page 9: Installing The Hardware
To connect a OMB-DAQ-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. -
Page 10: Chapter 3 Functional Details
LED indicates the communication status of a device. This LED blinks when data is Activity transferred, and is off when the device is not communicating. Screw terminals OMB-DAQ-2408 Series devices have two banks of screw terminals. Screw terminal functions for SE and DIFF modes are identified in Figure 3 and Figure 4. - Page 11 OMB-DAQ-2408 Series User's Guide Functional Details The OMB-DAQ-2408 Series device screw terminals provide the following connections: – see Figure 3) or eight DIFF ( 16 SE ( ) analog input connections CH15 CH0H/CH0L CH7H/CH7L Eight digital I/O connections (...
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Page 12: Signal Connections
Signal connections Input isolation OMB-DAQ-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. -
Page 13: Analog/Tc Input
OMB-DAQ-2408 Series User's Guide Functional Details Figure 5. OMB-DAQ-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. -
Page 14: Gain Queue
Gain queue Use the OMB-DAQ-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. -
Page 15: Tc Input Mode
TC output into the common-mode input range of the A/D. OMB-DAQ-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, and when enabled, it detects if an open-circuit condition exists at the TC sensor. - Page 16 Figure 8. OMB-DAQ-2408 Series A/D converter data rate vs. noise graph If low noise is your main concern, you can operate the OMB-DAQ-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 averaged out of the data, and issues such as reference noise become less important.
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Page 17: Analog Output (Omb-Daq-2408-2Ao Only)
OMB-DAQ-2408 Series User's Guide Functional Details Figure 9. OMB-DAQ-2408 Series data rate vs. resolution example Analog output (OMB-DAQ-2408-2AO only) The OMB-DAQ-2408-2AO has two 16-bit analog outputs ( AOUT0 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. - Page 18 Caution! The discharge of static electricity can damage some electronic components. Before removing the OMB-DAQ-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.
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Page 19: External Pull-Up/Pull-Down Capability
OMB-DAQ-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. -
Page 20: Mechanical Drawings
OMB-DAQ-2408 Series User's Guide Functional Details Mechanical drawings Figure 14. OMB-DAQ-2408 Series device circuit board (top) and enclosure dimensions... -
Page 21: Chapter 4 Specifications
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. -
Page 22: Channel Configurations
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 OMB-DAQ-2408 Series device such that they are floating with respect to AGND... -
Page 23: Analog Input Dc Voltage Measurement Accuracy
0.957 °C 0.595 °C To achieve the thermocouple accuracies listed above, warm up the OMB-DAQ-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. -
Page 24: Input Bandwidth
OMB-DAQ-2408 Series User's Guide Specifications Input bandwidth Table 6. input bandwidth –3 db Bandwidth (Hz) A/D data rate 3750 S/s 1615 2000 S/s 1000 S/s 500 S/s 100 S/s 44.2 60 S/s 26.5 50 S/s 22.1 25 S/s 11.1 10 S/s 4.42... -
Page 25: Channel Switching Error
OMB-DAQ-2408 Series User's Guide Specifications ±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 17.3 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... -
Page 26: Analog Voltage Output (Omb-Daq-2408-2Ao Only)
OMB-DAQ-2408 Series User's Guide Specifications 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 50 S/s 25 S/s 10 S/s 5 S/s 2.5 S/s 1102.94 877.19 609.76... -
Page 27: Analog Input/Output Calibration
OMB-DAQ-2408 Series User's Guide Specifications Parameter Conditions Specifications Settling time To rated accuracy, 10 V step 75 µS Slew rate 1.0 V/µs 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. -
Page 28: Counter
OMB-DAQ-2408 Series User's Guide Specifications Parameter Specifications Input low voltage 1.5 V max, 0.6 V min Schmitt trigger hysteresis 0.4 V min, 1.2 V max DGND pins are recommended for use with digital input and digital output pins. The DGND and Note 2: AGND pins are common and are isolated from earth ground. -
Page 29: Memory
500 VDC min Note 8: This is the total quiescent current requirement for the OMB-DAQ-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 AOUTx outputs. -
Page 30: Environmental
OMB-DAQ-2408 Series User's Guide Specifications Environmental Table 25. Environmental specifications Parameter Specifications Operating temperature range 0 °C to 50 °C max –40 °C to 85 °C max Storage temperature range Humidity 0 to 90% non-condensing max Mechanical Table 26. Mechanical specifications... - Page 31 OMB-DAQ-2408 Series User's Guide Specifications Screw terminal pinout Table 28. 8-channel differential mode pinout Signal name Pin description Signal name Pin description CH0H Channel 0 HI AGND Analog ground CH0L Channel 0 LO CH7L Channel 7 LO AGND Analog ground...
- Page 32 OMB-DAQ-2408 Series User's Guide Specifications Table 29. 16-channel single-ended mode pinout Signal name Pin description Signal name Pin description Channel 0 AGND Analog ground Channel 8 CH15 Channel 15 AGND Analog ground Channel 7 Channel 1 AGND Analog ground Channel 9...
- Page 33 Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification.
- Page 34 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors...
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