Industrial field device with reduced power consumption
First Claim
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1. A field device for use in monitoring or controlling an industrial process, comprising:
- two wire process control loop electrical connections;
field device electrical circuitry having a power-on input; and
digital communications monitoring circuitry coupled to the electrical connections and configured to provide a signal to the power-on input of the field device electrical circuitry in response to a digital signal on the two wire process control loop.
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Abstract
A field device for use in monitoring or controlling an industrial process includes two wire process control loop electrical connections. Digital communications monitoring circuitry coupled to the electrical connections and is configured to control power to the field device electrical circuitry in response to a digital signal on the two wire process control loop.
26 Citations
24 Claims
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1. A field device for use in monitoring or controlling an industrial process, comprising:
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two wire process control loop electrical connections; field device electrical circuitry having a power-on input; and digital communications monitoring circuitry coupled to the electrical connections and configured to provide a signal to the power-on input of the field device electrical circuitry in response to a digital signal on the two wire process control loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling operation of electrical circuitry in a field device of the type used in monitoring or controlling an industrial process, the method comprising:
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monitoring signals carried on a two wire process control loop; detecting a communications signal from the monitored signals on the two wire process control loop; and powering field device electrical circuitry in response to detected digital communications signal on the two wire process control loop. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification