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Summary of Contents for Measurement Computing USB-2404-UI
- Page 1 USB-2404-UI USB-based Universal Analog Input Device User's Guide Document Revision 2 March 2012 © Copyright 2012 Distributed by MicroDAQ.com, Ltd. www.MicroDAQ.com (603) 746-5524...
- Page 2 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.
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Page 3: Table Of Contents
Introducing the USB-2404-UI ....................... 6 Overview: USB-2404-UI features ........................6 Functional block diagram ........................... 7 Chapter 2 Installing the USB-2404-UI ........................8 What comes with your USB-2404-UI shipment? ....................8 Hardware ..................................8 Documentation .................................. 8 Unpacking................................8 Installing the software ............................8 Installing the hardware ............................ - Page 4 USB-2404-UI User's Guide Environmental ..............................19 Mechanical ............................... 19 Safety voltages ..............................19 Spring terminal connectors ..........................19 Accessory products ............................20 Declaration of Conformity ........................21 Distributed by MicroDAQ.com, Ltd. www.MicroDAQ.com (603) 746-5524...
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Page 5: Preface
Email: techsupport@mccdaq.com Hazardous voltages You can connect hazardous voltages to the USB-2404-UI device's spring terminals. A hazardous voltage is a voltage greater than 42.4 V or 60 VDC to earth ground. Take the following precautions if you connect hazardous voltages to the USB-2404-UI: Caution! Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards. -
Page 6: Introducing The Usb-2404-Ui
Chapter 1 Introducing the USB-2404-UI Overview: USB-2404-UI features This user's guide contains all of the information you need to connect the USB-2404-UI to your computer and to the signals you want to measure. ® ® The USB-2404-UI is a USB 2.0 high-speed device that is supported under popular Microsoft Windows operating systems. -
Page 7: Functional Block Diagram
USB-2404-UI User's Guide Introducing the USB-2404-UI Functional block diagram USB-2404-UI functions are illustrated in the block diagram shown here. Figure 1. USB-2404-UI functional block diagram Distributed by MicroDAQ.com, Ltd. www.MicroDAQ.com (603) 746-5524... -
Page 8: Installing The Usb-2404-Ui
Install the software before you install your device A driver needed to run the USB-2404-UI 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. -
Page 9: Calibrating The Usb-2404-Ui
USB drivers. To connect the USB-2404-UI to your system, turn your computer on, and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer. The USB cable provides power and communication to the USB-2404-UI. -
Page 10: Chapter 3 Functional Details
Figure 3. Rear panel Spring terminal connectors The USB-2404-UI has four 6-terminal connectors (CH0 to CH3) that provide connections for four analog input channels. The signal names for the spring terminal in each connector are listed in the table below. -
Page 11: Strain Relief Slot
— — — Refer to "USB-2404-UI circuitry" on page 13 for information about connections in each mode. Strain relief slot Use the strain relief slot to keep the USB cable from disconnecting from the device inadvertently. Feed a tie wrap through the slot and secure to the USB cable when it is connected to the device. -
Page 12: Teds Sensor Connections
When making a floating connection between the signal source and the USB-2404-UI, make sure the voltages on the positive and negative connections are within the channel-to-earth voltage range. Refer to the Specifications chapter for operating voltages and information about overvoltage protection. -
Page 13: Usb-2404-Ui Circuitry
Voltage and current modes In voltage and current modes, connect the signal source to the USB-2404-UI across the HI and LO terminals. The current is computed from the voltage that the ADC measures across an internal shunt resistor. Voltage and current mode connections are shown in Figure 8. -
Page 14: 3-Wire Rtd Mode
USB-2404-UI User's Guide Functional Details 3-wire RTD mode 3-wire RTD mode sources a current which varies based on the resistance of the load between the EX+ and EX– terminals. This mode compensates for lead wire resistance in hardware if all lead wires have the same resistance. -
Page 15: Thermocouple Mode
Each channel has a built-in thermistor for cold-junction compensation (CJC) calculations. For improved CJC sensor accuracy, operate the USB-2404-UI in a stable temperature environment, and avoid placing heat sources near the device or its connectors. Open thermocouple detection is not supported. Refer to the Specifications chapter for more information about accuracy. -
Page 16: Chapter 4 Specifications
Chapter 4 Specifications All specifications are subject to change without notice. Typical for the range 0 to 60 °C unless otherwise noted. Analog input Table 1. Analog input specifications Parameter Conditions Specification Number of channels A/D converter resolution 24-bit A/D converter type Delta-Sigma with analog pre-filtering Sampling mode Simultaneous... -
Page 17: Accuracy
USB-2404-UI User's Guide Specifications Current ±25 mA ±25 mA 10 kΩ, 1 kΩ 10.5 kΩ, 1.05 kΩ 4-wire and 2-wire resistance Thermocouple ±125 mV ±125 mV 5.05 kΩ, 505 Ω 4-wire and 3-wire RTD Pt 1000, Pt 100 350 Ω, 120 Ω... -
Page 18: Input Noise
USB-2404-UI User's Guide Specifications Full-bridge, ±62.5 mV/V ±3 ±20 Full-bridge, ±7.8 mV/V ±3 ±20 Input noise Table 5. Input noise (ppm of rangerms) specifications Conversion time High speed Best of 60 Hz Best of 50 Hz High resolution Mode, range... -
Page 19: Bus Interface
Storage humidity 5 to 95% RH, non-condensing Maximum altitude 2000 meter (6562 feet) Note 2: The USB-2404-UI is intended for indoor use only, but may be used outdoors if installed in a suitable enclosure Mechanical Table 11. Mechanical specifications Parameter... -
Page 20: Accessory Products
USB-2404-UI User's Guide Specifications Table 14. Signal names Terminal number Signal name Signal description TEDS Data T– TEDS Common EX+/HI (Note 4) Positive excitation or input signal Positive input signal EX–/LO (Note 4) Negative excitation or input signal Negative input signal Note 4: Depending on the input mode, terminals 3 and 5 are either excitation signals or input signals. -
Page 21: Declaration Of Conformity
Norton, MA 02766 Category: Electrical equipment for measurement, control and laboratory use. Measurement Computing Corporation declares under sole responsibility that the product USB-2404-UI to 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). - Page 22 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton, Massachusetts 02766 (508) 946-5100 Fax: (508) 946-9500 E-mail: info@mccdaq.com www.mccdaq.com Distributed by MicroDAQ.com, Ltd. www.MicroDAQ.com (603) 746-5524...
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