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Measurement Computing USB-2416 User Manual

Usb-based 24-bit, isolated, high-channel-count multifunction daq device
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USB-2416
USB-based 24-bit, Isolated, High-Channel-Count Multifunction DAQ Device
December 2019. Rev 9
© Measurement Computing Corporation
User's Guide

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Summary of Contents for Measurement Computing USB-2416

  • Page 1 USB-2416 USB-based 24-bit, Isolated, High-Channel-Count Multifunction DAQ Device User's Guide December 2019. Rev 9 © Measurement Computing Corporation...
  • Page 2 Other product and company names mentioned herein are trademarks or trade names of their respective companies. © 2019 Measurement Computing Corporation. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by photocopying, recording, or otherwise without the prior written permission of Measurement Computing Corporation.

  • Page 3: Table Of Contents

    What you will learn from this user's guide ......................5 Conventions in this user's guide ......................... 5 Where to find more information ......................... 5 Chapter 1 Introducing the USB-2416 ........................6 Functional block diagram ........................... 6 Chapter 2 Installing the USB-2416 ........................7 Unpacking................................
  • Page 4 Mechanical ............................... 38 Screw terminal connector type and pinout ....................... 39 Screw terminal pinout ..............................39 Optional AI-EXP32 expansion module ......................42 AI-EXP32 Screw terminal pinout ............................44 USB-2416 screw terminal pinout (with AI-EXP32 attached) ..................46 EU Declaration of Conformity ......................47...

  • Page 5: Preface

    Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. Where to find more information Additional information about the USB-2416 is available on our website at www.mccdaq.com. You can also contact Measurement Computing Corporation by phone, fax, or email with specific questions.

  • Page 6: Introducing The Usb-2416

    Six banks of removable screw-terminal blocks provide connectivity to the analog input channels, digital I/O  lines, and counter/timer channels. The USB-2416 is powered by an external 5 V, 2 A regulated power supply (PS-5V2AEPS) that ships with the device. Functional block diagram USB-2416 functions are illustrated in the block diagram shown here.

  • Page 7: Installing The Usb-2416

    Contact us immediately if any components are missing or damaged. Installing the software Refer to the MCC DAQ Quick Start and the USB-2416 product page on our website for information about the software that supports the device. Install the software before you install your device The driver needed to run the USB-2416 is installed with the software.

  • Page 8: Connecting An Ai-Exp32 To The Dsub37 Expansion Connector

    Figure 3. USB-2416 secured to an AI-EXP32 Connect the external power supply to the power input port of the USB-2416, and then plug it into an AC outlet. Connect the USB cable from the USB-2416 to the host computer USB port.

  • Page 9: Field Calibration

    Avoid touching board surfaces and onboard components. Only handle boards by their edges. Make sure the USB-2416 does not come into contact with foreign elements such as oils, water, and industrial particulate. The discharge of static electricity can damage some electronic components. Semiconductor devices are especially susceptible to ESD damage.

  • Page 10: Functional Details

    USB connector 37-pin DSUB expansion connector (connects to AI-EXP32) Screw terminals The USB-2416 has six groups of screw terminals—three on each side of the enclosure – that provide the following connections: 16 analog/TC inputs ( CH0H/CH0L CH15H/CH15L ...
  • Page 11 USB-2416 User's Guide Functional Details Figure 5. 16-channel differential mode pinout Differential connection guidelines When connecting differential voltage inputs to a floating voltage source, make sure there is a DC return path from each voltage input to ground. You make this path by connecting a resistor from each input to a GND pin.
  • Page 12 USB-2416 User's Guide Functional Details Figure 6. 32-channel single-ended mode pinout...

  • Page 13: Leds

    Figure 7. 32-channel single-ended mode pinout when connected to AI-EXP32 LEDs When the USB-2416 is connected to a computer and in its normal idle state, both LEDs are lit solid green. Power LED The Power LED is the top LED on the right side of the USB-2416 housing.

  • Page 14: Usb Connector

    Activity LED The (USB) Activity LED is the bottom LED on the right side of the USB-2416 housing. It blinks rapidly when both the USB cable and external power cables are plugged in. It continues blinking rapidly while the device is connecting to the computer, and then turns solid.

  • Page 15: Thermocouple Inputs

    ESD practices and discharge any accumulated ESD charge. The USB-2416 includes an ESD protection device at each of the analog input terminal block pins. If an ESD or transient voltage is coupled into the device, the input protection device(s) clamps the voltage to protect the thermocouple input circuitry from possible damage.

  • Page 16: Noise Filtering, Data Rate, And Throughput Rate

    Figure 10. USB-2416 A/D converter data rate vs. noise graph If low noise is your main concern, you can operate the USB-2416 at very low data rates starting from 2.5 S/s. At low rates, much of the noise is averaged out of the data, and issues such as reference noise become less important.

  • Page 17: Input Isolation

    Figure 11. USB-2416 data rate vs. resolution example Input isolation The USB-2416 is an isolated data acquisition device. The analog input, 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 use by the circuit connected to the system bus interface.

  • Page 18: Digital I/O

    Functional Details Digital I/O The USB-2416 provides up to eight digital I/O lines with read/write rates of 500 port reads or single bit reads per second. Digital input voltage ranges of 0 V to 15 V are permitted, with thresholds of 0.6 V (low) and 2.6 V (high). Each DIO channel is an open-drain, which, when used as an output, is capable of sinking up to 150 mA for direct drive applications.

  • Page 19: External Pull-Up/Pull-Down Capability

    USB-2416 User's Guide Functional Details Figure 14. Location of screws connecting bottom and top sections of case Figure 15. Location and default configuration (pull-up) of JP1 The pull-up/pull-down voltage is common to all of the internal 47 kΩ resistors. External pull-up/pull-down capability You can also place an external pull-up resistor on any of the DIO bits.

  • Page 20: Counter Input Terminals (Ctr0, Ctr1)

    USB-2416 User's Guide Functional Details Counter input terminals (CTR0, CTR1) Two 32-bit event counters accept frequency inputs up to 1 MHz. Refer to Figure 5 through Figure 7 on pages 11-13 for the location of these pins. The internal counter increments when the TTL levels transition from low to high.

  • Page 21: 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

    USB-2416 User's Guide Specifications Parameter Conditions Specification CJC sensor accuracy 15 °C to 35 °C ±0.15 °C typ 0 °C to 55 °C ±0.5 °C max Note 1: Placing a notch of the A/D digital filter at 60 Hz (setting A/D data rate = 60 S/s, 10 S/s, 5 S/s or 2.5 S/s) further improves the common mode rejection of this frequency.
  • Page 23 USB-2416 User's Guide Specifications Connect thermocouples to the USB-2416 such that they are floating with respect to GND (pins 18, 36, 39, 42, 44, 46, 66, 81, 84, 93, and 94). When configuring thermocouple sensors, keep any stray capacitance relative to GND (pins 18, 36, 39, 42, 44, 46, 66, 81, 84) as small as possible to avoid settling time and accuracy errors.
  • Page 24 2.396 °C 1.941 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 25 1.915 °C 1.524 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 26 2.619 °C 2.123 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 27 2.922 °C 2.332 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 28 1820 °C 1.962 °C 1.601 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after initial power on. The accuracies listed are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 29 1.539 °C 1.175 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.
  • Page 30 0.912 °C 0.551 °C To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic enclosure.

  • Page 31: Analog Input Dc Voltage Measurement Accuracy

    USB-2416 User's Guide Specifications Analog input DC voltage measurement accuracy: Table 12. DC Accuracy components and specifications. All values are (±) Range A/D data Gain error Offset INL error Absolute Gain temperature Offset temperature rate (% of error (% of...
  • Page 32 USB-2416 User's Guide Specifications Range A/D data Gain error Offset INL error Absolute Gain temperature Offset temperature rate (% of error (% of accuracy coefficient (% coefficient (µV/°C) reading) range) reading/°C) 1.25 V 3750 S/s 0.0025 7 µV 0.0008 48.050 µV 0.0006...

  • Page 33: Input Bandwidth

    USB-2416 User's Guide Specifications Range A/D data Gain error Offset INL error Absolute Gain temperature Offset temperature rate (% of error (% of accuracy coefficient (% coefficient (µV/°C) reading) range) reading/°C) ±0.078125 V 3750 S/s 0.035 6 µV 0.0009 33.547 µV 0.0006...

  • Page 34: Channel Switching Error

    USB-2416 User's Guide Specifications Table 15. RMS noise performance specifications (µVRMS) A/D data rate Range (V) 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 ±20 34.90 28.32...

  • Page 35: Throughput Rate

    USB-2416 User's Guide Specifications Throughput rate The single channel throughput rate is calculated using this formula: +640 µs Maximum throughput = data rate Table 18. Single channel throughput rate specifications A/D data rate Maximum throughput (Hz) 3750 S/s 1102.94 2000 S/s 877.19...

  • Page 36: Analog Input Calibration

    USB-2416 User's Guide Specifications Analog input calibration Table 20. Analog input calibration specifications Parameter Specifications Recommended warm-up time 45 minutes min Calibration Firmware calibration Calibration interval 1 year Calibration reference +10.000 V, ±5 mV max. Actual measured values stored in EEPROM Tempco: 5 ppm/°C max...

  • Page 37: Counter

    USB-2416 User's Guide Specifications Note 5: The external pull-up is connected to the digital output bit through an external pull-up resistor. Adding an external pull-up resistor connects it in parallel with the internal 47k Ω pull-up resistor of that particular digital input/output bit.

  • Page 38: Power

    Center positive Note 8: This is the total quiescent current requirement for the USB-2416 which includes up to 10 mA for the status LED. This does not include any potential loading of the digital I/O bits or the +5V user terminal.

  • Page 39: Screw Terminal Connector Type And Pinout

    USB-2416 User's Guide Specifications Screw terminal connector type and pinout Table 31. Screw terminal connector specifications Connector type Detachable screw terminal Wire gauge range 16 AWG to 30 AWG Screw terminal pinout For additional channel configurations when using the optional AI-EXP expansion device, refer to the "Optional...
  • Page 40 USB-2416 User's Guide Specifications Table 32. 16-channel differential mode pinout Do not connect to terminal block pins labeled "NC." Signal name Pin description Signal name Pin description No connect No connect CH0H Channel 0 HI CH15L Channel 15 LO CH0L...
  • Page 41 USB-2416 User's Guide Specifications Table 33. 32-channel single-ended mode pinout Do not connect to terminal block pins labeled "NC." Signal name Pin description Signal name Pin description No connect No connect CH0H Channel 0 CH15L Channel 31 CH0L Channel 16...

  • Page 42: Optional Ai-Exp32 Expansion Module

    Use the AI-EXP32 (sold separately) for applications that need additional analog/thermocouple input and digital I/O channels. See Measurement Computing web site for product details. The AI-EXP32 expansion port is intended to interface with a USB-2416 series product. Do not try to use any of the expansion port pins for any other purpose.
  • Page 43 USB-2416 User's Guide Specifications Table 35. Multiple-channel throughput rate specifications (Hz), USB-2416 and optional AI-EXP32 expansion module. Number 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...

  • Page 44: Ai-Exp32 Screw Terminal Pinout

    USB-2416 User's Guide Specifications AI-EXP32 Screw terminal pinout Table 36. 32-channel differential mode pinout Do not connect to terminal block pins labeled "NC." Signal name Pin description Signal name Pin description CH16H Channel 16 HI CH31L Channel 31 LO CH16L...
  • Page 45 USB-2416 User's Guide Specifications Table 37. 32-channel single-ended mode pinout Do not connect to terminal block pins labeled "NC." Signal name Pin description Signal name Pin description CH16H Channel 16 CH31L Channel 63 CH16L Channel 48 CH31H Channel 31 CH17H...

  • Page 46: Usb-2416 Screw Terminal Pinout (With Ai-Exp32 Attached)

    USB-2416 User's Guide Specifications USB-2416 screw terminal pinout (with AI-EXP32 attached) Table 38. USB-2416 single-ended mode pinout with AI-EXP32 connected Do not connect to terminal block pins labeled "NC." Signal name Pin description Signal name Pin description No connect No connect...

  • Page 47: Eu Declaration Of Conformity

    October 16, 2017, Norton, Massachusetts USA Test Report Number: EMI5075.08 / EMI5271.09 Measurement Computing Corporation declares under sole responsibility that the product USB-2416 is in conformity with the relevant Union Harmonization Legislation and complies with the essential requirements of the following applicable European Directives:...
  • Page 48 Measurement Computing Corporation NI Hungary Kft 10 Commerce Way H-4031 Debrecen, Hátar út 1/A, Hungary Norton, Massachusetts 02766 Phone: +36 (52) 515400 (508) 946-5100 Fax: +36 (52) 515414 Fax: (508) 946-9500 http://hungary.ni.com/debrecen E-mail: info@mccdaq.com www.mccdaq.com...

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