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Acromag IOS-320 User Manual

12-bit high-density analog input module
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IOS-320
12-Bit High-Density Analog Input Module
USER'S MANUAL
ACROMAG INCORPORATED
Tel: (248) 295-0310
30765 South Wixom Road
Fax: (248) 624-9234
P.O. BOX 437
Wixom, MI 48393-7037 U.S.A.
solutions@acromag.com
Copyright 2009, Acromag, Inc., Printed in the USA.
8500-837-C11C007
Data and specifications are subject to change without notice.

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Summary of Contents for Acromag IOS-320

  • Page 1 USER’S MANUAL ACROMAG INCORPORATED Tel: (248) 295-0310 30765 South Wixom Road Fax: (248) 624-9234 P.O. BOX 437 Wixom, MI 48393-7037 U.S.A. solutions@acromag.com Copyright 2009, Acromag, Inc., Printed in the USA. 8500-837-C11C007 Data and specifications are subject to change without notice.

  • Page 2: Table Of Contents

    The information contained in this manual is subject to change IMPORTANT SAFETY CONSIDERATIONS without notice. Acromag, Inc. makes no warranty of any kind with It is very important for the user to consider the possible adverse regard to this material, including, but not limited to, the implied effects of power, wiring, component, sensor, or software failures warranties of merchantability and fitness for a particular purpose.

  • Page 3: I/O Server Module Interface Features

    For repairs to a product damaged in shipment, refer to the Acromag Service Policy to obtain return instructions. It is suggested that salvageable shipping cartons and packing material be saved for future use in the event the product must be shipped.

  • Page 4: Analog Input Range Hardware Jumper Configuration

    SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ Analog Input Range Hardware Jumper Configuration Table 2.3: Unipolar Straight Binary Analog Data Format* Analog Input Voltage Unipolar Straight Binary Data The ADC input range is programmed via hardware DIP...

  • Page 5: Connectors

    (12-bits or more). Contact your Acromag representative for Pin Description Number Pin Description Numbe information on our many isolated signal conditioning products that could be used to interface to the IOS-320 input module. SCH00/+DCH00 SCH32/-DCH12 SCH20/-DCH00 SCH13/+DCH13 External Trigger Input...

  • Page 6: Programming Information

    64 byte block. The W - ADC Convert Command IOS-320 ID space contents are shown in Table 3.1. Note that the base-address for the IOS module ID space (see your carrier board instructions) must be added to the addresses shown to Repeated ADC Convert Command properly access ID space.
  • Page 7 SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ Bit 15: When read, the CTRIG bit indicates whether an ADC conversion has been triggered, either by software command or external trigger input. If the bit reads Mode...

  • Page 8: Control Register

    Read ADC Data command is executed while the ADC (see Section 2) - make sure that all pertinent voltage and pulse conversion is taking place, then the IOS-320 will institute wait width constraints are met. The conversion is initiated on the states until the data is available (up to 4.5 uS) before providing...

  • Page 9: Uncalibrated Performance

    ½ LSB non-linearity of the ADC and the ¼ LSB non-linearity of the PGA). Calibrated Performance Very accurate calibration of the IOS-320 can be accomplished by using calibration voltages present on the board. The four voltages and the analog ground reference are used to determine the endpoints of a straight line which defines the analog input characteristic.
  • Page 10 SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ The following equation (1) is used to correct the actual ADC Calibration Programming Example 1 data (i.e. the uncorrected bit count read from the ADC) making use of the calibration voltages and range constants.

  • Page 11: Theory Of Operation

    This section describes the functionality of the IOS-320 that the 12-bit data is left-justified within the 16-bit word. circuitry. Refer to the IOS-320 block diagram on page 15 as you 10. Repeat steps 8 and 9 several times (e.g. 16) and take the study the following paragraphs.

  • Page 12: Service And Repair

    It is highly recommended that a non-functioning returns to the sample mode to acquire the next channel. Once a board be returned to Acromag for repair. The board can be conversion has been started, the control register can be updated damaged unless special SMT repair and service tools are used.

  • Page 13: Specifications

    SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ 6.0 SPECIFICATIONS Radiated Emissions....Meets or exceeds European Norm EN50081-1 for class B equipment. Shielded cable with GENERAL SPECIFICATIONS I/O connections in shielded Physical Configuration....Single I/O Server Module enclosure are required to meet Length........
  • Page 14 SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ 4. Follow the input connection recommendations of Section 2, Programmable Calibration Voltages follow: because input noise and non-ideal grounds can degrade overall system accuracy. For critical applications multiple input samples can be averaged to improve performance.
  • Page 16 SERIES IOS-320 I/O SERVER MODULE 12-BIT HIGH DENSITY ANALOG INPUT BOARD __________________________________________________________________________________________ - 16 - Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com...

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