Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2011-08-23
2011-08-23
Patel, Ajit (Department: 2617)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S573000, C455S574000, C455S127100, C455S343100, C455S343200
Reexamination Certificate
active
08005514
ABSTRACT:
The present invention provides a field device whereby the device's additional information can be transmitted wirelessly without the need for battery replacement or external wiring. The present invention also provides a field device whereby the firmware of a wireless module in the field device can be developed at minimum cost and whereby it can be made easy to link the firmware to applications, such as an asset management system, on the host system side.The field device in accordance with the present invention is installed in a plant, factory, or the like, connected to a higher-order distributed control system through a signal line, configured to input or output 4-20 mA signals, and comprised of:an RF unit for transmitting or receiving radio signals; anda power supply block for accumulating extra electric currents when the block is neither transmitting nor receiving radio signals;wherein electric currents accumulated in the power supply block are supplied to the RF unit so as to be used as electric power for transmitting or receiving radio signals.
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Nishijima Takashi
Saito Yoji
Nguyen Khai M
Patel Ajit
Westerman Hattori Daniels & Adrian LLP
Yokogawa Electric Corporation
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