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Ethernet interface

  • US 8,132,035 B2
  • Filed: 05/27/2008
  • Issued: 03/06/2012
  • Est. Priority Date: 05/25/2007
  • Status: Expired due to Fees
First Claim
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1. A system for interfacing with an industrial process, comprising:

  • (A) at least one field device, the field device being configured to measure an industrial parameter and generate an analog signal, the analog signal containing data related to the industrial parameter;

    (B) at least one network adapter in communication with the field device, the network adapter comprising;

    (a) an Ethernet port; and

    (b) power circuitry configured to derive power from the Ethernet port and to provide power derived from the Ethernet port to the field device; and

    (C) wherein the network adapter couples directly to the at least one field device using an analogue current loop, wherein the network adapter provides power to the field device via the analog current loop, and wherein the network adapter is configured to read the analog signal from the field device on the analogue current loop, generate digital data from the analog signal, and transmit the digital data to a communication network through the Ethernet port.

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