System and method of powering and communicating field ethernet device for an instrumentation and control using a single pair of powered ethernet wire

An industrial process field device for use with a powered Ethernet connection, the industrial process field device comprising:

• communications circuitry operable to exchange data with an industrial process control device over an Ethernet connection using an Ethernet protocol;
• power circuitry operable to extract operating power from the Ethernet connection;
• and
• process circuitry operable to:
• sense a physical condition of an industrial application and to transmit information about the sensed physical condition to the industrial process control device using the Ethernet connection;
• or
• control the physical condition of the industrial application in response to a process command received from the industrial process control device through the Ethernet connection.

A method of providing data and electrical power to an industrial process field device, the method comprising:

• injecting an electrical power signal onto an Ethernet connection;
• transmitting the electrical power signal and control data over the Ethernet connection, the control data being generated by a control device;
• extracting the electrical power signal and the control data at the industrial process field device for an industrial application, the instrumentation device implementing an instrumentation operation using the electrical power signal;
• collecting physical data at the instrumentation device;
• and
• receiving the physical data at the control device via the Ethernet connection.

A method of providing data and electrical power to an industrial process field device, the method comprising:

• injecting an electrical power signal onto a two-wire Ethernet connections;
• transmitting the electrical power signal and control data over the two-wire Ethernet connection, the control data being generated by a control device;
• extracting the electrical power signal and the control data at the industrial process field device for an industrial application, the instrumentation device implementing an instrumentation operation using the electrical power signal;
• collecting physical data at the instrumentation device;
• and
• receiving the physical data at the control device via the two-wire Ethernet connection.

An industrial control system comprising:

• an industrial controller operable to output control data;
• an Ethernet connection including at least a first pair of wires, the first pair of wires being operable to communicate both the control data and an electrical power signal;
• and
• a monitor connected to the Ethernet connection and operable to receive the electrical power signal and the control data to thereby monitor an industrial application.

An industrial control system comprising:

• an industrial controller operable to output control data;
• an Ethernet connection including at least a first pair of wires, the first pair of wires being operable to communicate both the control data and an electrical power signal;
• and
• an actuator connected to the Ethernet connection and operable to receive the electrical power signal and the control data to thereby actuate a process in an industrial application.

A method of transmitting data comprising:

• outputting transmit data over a first connection;
• inputting receive data over a second connection;
• providing a two-wire Ethernet connection operable to transfer the transmit data and the receive data;
• providing an electrical power signal over the two-wire Ethernet connection;
• and
• switching a switch connected to the two-wire Ethernet connection between the first connection for transferring the transmit data over the two-wire Ethernet connection and the second connection for transferring the receive data over the two-wire Ethernet connection.

A data transfer system comprising:

• a transmitter operable to output transmit data;
• a first connection associated with the transmitter and operable to output the transmit data;
• a second connection associated with the transmitter and operable to input receive data;
• a two-wire Ethernet connection operable to transfer the transmit data and the receive data;
• a switch connected to the two-wire Ethernet connection and operable to switch between the first connection when transmitting the transmit data and the second connection when transmitting the receive data;
• and
• a power injector operable to provide an electrical power signal over the two-wire Ethernet connection.