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IOtech 6224 User Manual

12 channel, 24-bit, half/full-analog input, ethernet
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USER'S MANUAL
6224
12 Channel  24-Bit  Half/Full-Bridge Analog Input  Ethernet
High-speed, Strain Gauge Input Module
IOtech
25971 Cannon Road
Cleveland, OH 44146-1833
(440) 439-4091
*372738A-01*
Fax: (440) 439-4093
sales@iotech.com
productsupport@iotech.com
372738A-01
1172-0901 rev 1.0
www.iotech.com

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Summary of Contents for IOtech 6224

  • Page 1 USER’S MANUAL 6224 12 Channel  24-Bit  Half/Full-Bridge Analog Input  Ethernet High-speed, Strain Gauge Input Module IOtech 25971 Cannon Road Cleveland, OH 44146-1833 (440) 439-4091 *372738A-01* Fax: (440) 439-4093 sales@iotech.com productsupport@iotech.com 372738A-01 1172-0901 rev 1.0 www.iotech.com...
  • Page 2 IOtech cannot be held liable for any damages resulting from the use or misuse of this product. Copyright, Trademark, and Licensing Notice All IOtech documentation, software, and hardware are copyright with all rights reserved. No part of this product may be copied, reproduced or transmitted by any mechanical, photographic, electronic, or other method without IOtech’s prior written consent.

  • Page 3: Table Of Contents

    Product Care …… 7-1 The Readme Files and the Install CD-ROM …… 7-2 Customer Support …… 7-2 Chapter 8 – Specifications, IOtech 6224 For information regarding digital circuitry, refer to the Digital I/O section of the Specifications chapter. IOtech 6224 User’s Manual...

  • Page 4: Quick Start

    In this scenario an IOtech 6224 is connected directly to an Ethernet port on a host computer. Connect the Ethernet cable to the Ethernet jack on the 6224. If connecting directly to the PC, as indicated above (i.e., instead of connecting to a network hub) you must use an Ethernet crossover cable.
  • Page 5 RJ-50 jacks. Using RJ-45 plugs can cause permanent damage to RJ-50 pins 1 and 10, thus disabling shunt calibration. The 6224 has 12 analog channel inputs (CH1 through CH12) via front panel RJ-50 jacks and 8 digital I/O lines via rear panel DB9 connector.

  • Page 6: Chapter 1 - General Information

    RJ50 Cables (CN-272-01) …… 1-7 Introduction IOtech 6224 is a twelve-channel, 24-bit resolution strain measurement device that connects to a host PC’s Ethernet port. The device is used to measure half-bridge and full-bridge sensors and can be synchronized with other 6000 series devices.

  • Page 7: Rear Panel

    Terminating Slave Unit. The assignment is made in Encore. Refer to the following section, Synchronization, for details. Refer to Accessories in the Specifications chapter for SYNC cables available from IOtech. Up to nine units can be synchronized. The total combined length of the SYNC cables is not to exceed 2.438m (8 ft).

  • Page 8: Analog Circuitry

    1 on page 3-1 and in the block diagram (page 2-1). You can connect the IOtech 6224 to a device that is biased at any voltage within the unit’s rejection range of earth ground. The Specifications chapter includes additional information.

  • Page 9: Synchronization

    Reference Note: For detailed information refer to the Encore software’s Comprehensive Help. You can access the Help from within Encore. After doing so, navigate to the synchronization related topic as follows from the Help’s Contents panel: Configuring Hardware>>Hardware Setup>>Synchronizing Devices. General Information IOtech 6224 User’s Manual 949290...

  • Page 10: Stacking Plate And Handle Options

    Stacking Plate and Handle Options IOtech 6000 Series device chassis are equipped with feet (on the lower panel) and dimples (on the upper panel) to allow for quick stacking of units. A rigid securing of two or more units together is possible with the use of optional stacking plate kits (190658A-01).
  • Page 11 The CN-270 components each house a 350 ohm resistor. You will need an RJ50 M/M cable to use any of the Quarter-Bridge components with an IOtech 6224. IOtech offers a pack of four RJ50 M/M, 1 meter (3.28ft) cables (see upcoming RJ50 Cables section).

  • Page 12: Rj50 12-Pin Screw Terminal Accessory (Cn-268)

    RJ50 Cables (CA-272-01) When connecting a cable from an IOtech 6224 RJ50 jack to an associated IOtech accessory (CN-268, CN-269, or CN- 270), be sure to only use RJ50 M/M cables. Use of another cable type can damage RJ50 pins.

  • Page 13: Chapter 2 - Block Diagram

    Block Diagram IOtech 6224 User’s Manual Block Diagram 959790...

  • Page 14: Chapter 3 - Pinouts And Connections

    • For CH9, CH10, CH11, and CH12, the signal values of pins 6, 7, and 9 are shared. Note 2: IOtech 6224 only supports TEDS if the acquisition software being used supports TEDS. Do not connect an RJ-45 plug to an RJ-50 jack. Using RJ-45 plugs can cause permanent damage to RJ-50 pins 1 and 10, thus disabling shunt calibration.

  • Page 15: Connecting Teds Channels

    Full-Bridge Notes: (1) When connecting a bridge to an IOtech 6224, the following connections are optional: RS+, RS-, SC, T+, T-. (2) For the half-bridge and quarter-bridge, there is no AI- signal to connect. (3) To create a quarter-bridge, place an external resistor across the two SC lines of a half-bridge. IOtech offers two external Quarter-Bridge accessories, CN-269 (120 ohm) and CN-270 (350 ohm).

  • Page 16: Shunt Calibration

    3.3V, then channels, 2, 3, and 4 will also have 3.3V excitation. The 6224 measures the ratio of bridge output to bridge excitation, and as such does not require accurate excitation voltage. For this reason the excitation voltage is not precisely regulated and may vary as much as 10% from the requested voltage, while still achieving accurate measurements.

  • Page 17: External Excitation Voltage Sources

    6224; thus all twelve channels can receive external excitation. External Excitation Voltage Sources The 6224 front panel includes three 4-pin connectors which provide a means of connecting external excitation voltage sources. Each external voltage source serves 4 channels, as follows; the first source applies excitation voltage to CH1 through CH4, the second to CH5 through CH8, and the third to CH9 through CH12.

  • Page 18: Where To Find Additional Information

    The internet is a great source for this material. In regard to TEDS (Transducer Electronic Data Sheet), you may find the IEEE 1451 standard to be of interest. IOtech 6224 User’s Manual Pinouts and Connectors 949290...

  • Page 19: Overview

    • immunity requirements for equipment used in controlled EM environments Refer to this product’s Declaration of Conformity (DoC) for any additional regulatory compliance iotech.com/CE information. To obtain the DoC for this product, visit Safety Conditions Users must comply with all relevant safety conditions as stated in the user’s manual and in the pertinent Declarations of Conformity.

  • Page 20: Emissions/Immunity Conditions

    Declaration of Conformity, if applicable to the device. CE Rules of Thumb The IOtech device is CE Compliant at the time it leaves the factory and should remain in compliance as long as the conditions stated on the Declaration of Conformity continue to be met.

  • Page 21: Noise Considerations

    Noise Considerations Controlling electrical noise is imperative because it can present problems even with the best measurement equipment. Most laboratory and industrial environments suffer from multiple sources of electrical noise. For example, AC power lines, heavy equipment (particularly if turned on and off frequently), local radio stations, and electronic equipment can create noise in a multitude of frequency ranges.

  • Page 22: Chapter 5 - Software, Iotech Encore

    Start>>All Programs>>IOtech>>Encore >>Comprehensive Help >>Quick Start Video Tutorial >>Getting Started Manual >>Readme Should you have questions or need support you can contact IOtech through one of the means provided on the front cover of this manual. IOtech 6000 Series Software 949290...

  • Page 23: Chapter 6 - Strain And Pressure Force

    Strain and Pressure/Force This chapter provides schematics of bridge circuits applicable the IOtech 6224 and the Encore software application. Illustrations for axial strain and bending strain are also provided, as are equations for converting voltage to strain units. To access and change strain properties, using IOtech’s Encore software application: Navigate as follows: Hardware Configuration»Acquisition Setup»Analog...
  • Page 24   − (strained) (unstrained)     6-2 Strain and Pressure/Force IOtech 6224 User’s Manual 949290...
  • Page 25 Encore converts voltage readings to strain units using the following equation:  4 − V r ⋅    µε ⋅  ⋅    ⋅ ⋅  GF 1 2 V r    IOtech 6224 User’s Manual Strain and Pressure/Force 949290...
  • Page 26 Encore converts voltage readings to strain units using the following equation:   4 − V r ⋅   µε ⋅  ⋅    ⋅ ⋅  GF 1 2 V r    6-4 Strain and Pressure/Force IOtech 6224 User’s Manual 949290...
  • Page 27 4 − V r ⋅     µε  ⋅   ⋅   ν − 2 V r ν −     GF 1   IOtech 6224 User’s Manual Strain and Pressure/Force 949290...
  • Page 28 Encore converts voltage readings to strain units using the following equation:  2 − V r ⋅    µε ⋅  ⋅        6-6 Strain and Pressure/Force IOtech 6224 User’s Manual 949290...
  • Page 29 R4 is an active strain-gauge element measuring tensile strain (+ε). Supplemental Information Encore converts voltage readings to strain units using the following equation:  −    µε ⋅   IOtech 6224 User’s Manual Strain and Pressure/Force 949290...
  • Page 30 R4 is an active strain-gauge element measuring tensile strain (+ε). Supplemental Information Encore converts voltage readings to strain units using the following equation:  2 − V r ⋅    µε ⋅   ⋅ ν GF 1 6-8 Strain and Pressure/Force IOtech 6224 User’s Manual 949290...
  • Page 31 Encore converts voltage readings to strain units using the following equation:  2 − V r ⋅  µε ⋅   ⋅   ν − V r ν −    GF 1  IOtech 6224 User’s Manual Strain and Pressure/Force 949290...
  • Page 32 V ex   Where: P = Pressure S = the sensitivity of the gauge in mV/V = the Full Scale Output (Output = the measured voltage = the excitation voltage 6-10 Strain and Pressure/Force IOtech 6224 User’s Manual 949290...

  • Page 33: Chapter 7 - Product Care And Customer Support

    ESD bags and cartons, and related procedures. Product Care IOtech 6000 series devices are essentially maintenance free and require only a minimal amount of care. They should be treated much like any other high-tech piece of equipment. In general: •...

  • Page 34: The Readme Files And The Install Cd-Rom

    Note: Before calling for assistance, take a few minutes to read all parts of the manual that may be relevant to the problem. Also, please review the troubleshooting material. You can reach IOtech by one of the following means: Phone:...
  • Page 35 Specifications – IOtech 6224 The following specifications are typical for the range -40 to 50°C, unless otherwise noted. Input Characteristics Number of analog channels ....12 Bridge completion Full and half ........Internal Quarter ..........External ADC resolution ........24 bits Type of ADC ........
  • Page 36 Internal power ..........450 mW max External voltage ..........2 V to 10 V Rejection by analog pre-filter of signal frequencies at oversample rate. Measured with a balanced cable. Shielded cables may be significantly unbalanced. Specifications IOtech 6224 User’s Manual 949290...
  • Page 37 (may be externally pulled up to 5.6V without damage) Output resistance: 40Ω Output Levels: (see 6000 Series Digital Output graph below) Sampling: 1 MHz max continuous Input / Output Circuit Output timing: Outputs are always written asynchronously. IOtech 6224 User’s Manual Specifications 949290...
  • Page 38 “user” or “software” calibration. When performing a “user” calibration via Encore (or other software) keep in mind that sample rate affects both gain and offset of the 6224, and therefore any “user” calibration should be performed at the same sample rate that is intended for measurements.
  • Page 39 Hub using a crossover cable may prevent that network link from functioning. Some modern routers have become an exception by including logic to detect the crossover cable and allow the network link to function. IOtech 6224 User’s Manual Specifications 949290...

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