I/O Devices Product Focus Study June 2002
By Control Engineering Staff -- Control Engineering, 3/29/2004
Executive Summary
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Among those specifying, recommending, and/or buying I/O devices, 77% do so for in-plant requirements, while 42% buy for OEM needs.
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The primary application for I/O devices among nearly half of those surveyed is both continuous and batch processing.
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Discrete input, discrete output, analog input and analog output are each used by more than 90% of respondents; making them the most widely used modules. Results suggest these will continue to be the most popular modules over the next year.
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Eighty-four percent of respondents apply their I/O devices within PLC systems. Slot in PLC, PCbased systems, distributed I/O systems and DIN-rail mounted (from PLC control supplier) represent a second tier of popular applications.
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4-20 mA is currently the most widely used communications network, based on usage among 90% of those surveyed. However, 4-20 mA will only be used by 83% of respondents next year, while Ethernet usage will grow from 79% to 85% of survey participants.
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Slightly more than three-quarters of respondents have purchased I/O devices from Allen- Bradley/Rockwell Automation in the past 12 months. This is more than double the penetration achieved by any other manufacturer.
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Respondents spent an average of $165,254 on I/O devices in the past year.
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Twenty-four percent of those surveyed report their purchases of I/O devices in the next 12 months will increase by an average of 45%. This compares to 14% of respondents projecting a decline in purchases by an average of 45%.
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Technical support, ease of use and installation factors are the most important criteria to respondents when buying I/O devices.
I/O Devices Product Focus Study 2002
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