Omega Engineering OM-DAQ-USB-2401 manual Connecting Various Hardware Setups

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3Hardware Setup

3.4 Connecting Various Hardware Setups

ON-DAQ-USB-2401 data acquisition systems range from simple to complex. One example of a simple system is that of one OM-DAQ-USB-2401 connected to a PC’s USB connector. A much more complex system is one that contains 10 OM- DAQ-USB-2401 units and a combination of USB-powered and self-powered hubs. Despite the wide range of possibilities in between, use of the following examples should enable you to properly connect your system.

NOTE:

In the examples that follow, the USB hubs have four external ports (downstream ports). The USB hubs used in your system may have more. Connections can be adjusted accordingly.

3.4.1 Direct Connection to Computer USB Port(s)

In this example, one DAQ unit is connected by cable to one of the computer’s USB ports. The number of USB connectors may vary from PC to PC. When you connect DAQ units directly to a USB connector in this manner, no additional power source is required since the computer’s USB connector power pins supply the DAQ with adequate power (500 mA at 4.75 to 5.25 V).

POWER

ADAPTER (OPTIONAL)

USB

Figure 3-3. Direct Connection to a Computer USB Port(s)

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Contents OM-DAQ-USB-2401 Servicing North America OM-DAQ-USB-2400 Multiple Channel USB Data Acquisition Module OM-DAQ-USB-2400 International Usage and CE Marking 10-1List of Figures SectionExamples of Under Sampling Precautions IntroductionGeneral Description & System Components Safety Warnings and IEC SymbolsStatement on CE Marking System Components Included Items HardwarePackage Inspection OM-DAQ-USB-2401 System Components Hardware SetupUSB Hubs and Power Adaptors Power Adaptors USB-powered HubsSelf-powered Hubs Connecting Your OM-DAQ-USB-2401 Acquisition System to PC Connecting Various Hardware Setups Direct Connection to Computer USB PortsConnection to USB-powered Hub Connections to Self-Powered and USB-powered HubsConnections to Self-Powered Hub and to USB-Powered Hub OM-DAQ-USB-2401 MountingOM-DAQ-USB-2401 Wall Mounting OM-DAQ-USB-2400 SeriesOM-DAQ-USB-2401 DIN Rail Mounting OM-DAQ-USB-2401 Rail MountingGetting Started Software InstallationSoftware System RequirementsSoftware Setup Welcome ScreenConfirm Installation Screen DAQ Central Software Operation Main Control WindowToolbar Buttons Toolbar ButtonsMain Control Window Pull-Down Operations File MenuTools Menu 2 Device Configuration Channels TabConfiguration Parameter Settings Manual Acquisition is manually started/stopped Level Data Tab Data Displays18. Main Window Screen 23. Waveform Screen A/D Conversion Power Line RejectionOptical Isolation Analog Input Configuration Input RangesMeasurement Duration, Scan Time, and Resolution Automatic Calibration 27. Calibration/Scan Arrangement28. Thermocouple Wiring Thermocouple MeasurementsResolution Effective Number of Bits ENOB, RMS Signal ManagementScan Time and Resolution Channel Control and ExpansionUnder Sampling and Aliasing RMSSignal Examples of Under SamplingSignal Modes TriggeringNoise Reduction in Differential Mode Analog Filtering System NoiseAveraging Vadc = VT x Ri / Rs + Ri Input and Source ImpedanceCrosstalk = RCCE Conformity OM-DAQ-USB-2401 Design for CE ConformityFerrite Core Symptoms and Solutions TroubleshootingBasic Checklist Service & Calibration Service & CalibrationSpecifications Thermocouple Input Range Power SupplyExternal Power Source Cold JunctionThermocouple Accuracy ºC for OM-DAQ-USB-2401 TC Type Temp Typical Fast SlowApprovals and Regulatory Compliance International Usage & CE Marking10-2 10-3 10-4 WARRANTY/DISCLAIMER Temperature