An industrial process field device includes first and second loop terminals configured to couple to a two-wire process control loop. Device circuitry is powered from the process control loop and monitors a process variable or controls a control device. A current regulator is in series with the loop terminals, and regulates a loop current. A first shunt voltage regulator regulates a voltage across the device circuitry. Supplemental circuitry is connected in series with the first shunt voltage regulator and the second loop terminal, and is powered by power from the two-wire process control loop shunted through the first shunt voltage regulator. A second shunt voltage regulator is connected in series with the first shunt voltage regulator and the second loop terminal, and in parallel with the supplemental circuitry, and regulates a voltage across the supplemental circuitry.

Disclosed is a field device adapter for wireless data transfer for connection to a field-device-internal interface provided for a display, comprising: an interface for connection to the field-device-internal interface; a radio module configured to wirelessly transmit a data packet on a low-power wide-area network, wherein the radio module is further configured to only transmit the data packet and not to receive any data packets; adapter electronics configured to limit an energy provided via the field-device-internal interface to a predefined value and to charge a stored energy source with the limited energy. The adapter electronics are further configured to monitor a state of charge of the stored energy source and, based on the state of charge, to provide the radio module with an energy originating from the stored energy source for transmitting the data packet.

Disclosed is a field device comprising: a connection terminal; field device electronics; an internal interface for connecting an electronic module; the electronic module having at least one electronic component for realizing an additional functionality; a capacitor, which is designed to provide an additional first auxiliary energy amount to the component if the component of the electronic module has an energy demand exceeding the main power; a battery, which is designed to provide a second auxiliary energy amount to the at least one component if the at least one component of the electronic module has an energy demand exceeding the main power and the first auxiliary energy amount, wherein the battery provides the second auxiliary energy amount to the component only if the main power and the first auxiliary energy amount are not sufficient for the energy supply of the component.

An industrial process field device includes first and second loop terminals configured to couple to a two-wire process control loop. Device circuitry is powered from the process control loop and monitors a process variable or controls a control device. A current regulator is in series with the loop terminals, and regulates a loop current. A first shunt voltage regulator regulates a voltage across the device circuitry. Supplemental circuitry is connected in series with the first shunt voltage regulator and the second loop terminal, and is powered by power from the two-wire process control loop shunted through the first shunt voltage regulator. A second shunt voltage regulator is connected in series with the first shunt voltage regulator and the second loop terminal, and in parallel with the supplemental circuitry, and regulates a voltage across the supplemental circuitry.

Disclosed is a field device adapter for wireless data transfer for connection to a field-device-internal interface provided for a display, comprising: an interface for connection to the field-device-internal interface; a radio module configured to wirelessly transmit a data packet on a low-power wide-area network, wherein the radio module is further configured to only transmit the data packet and not to receive any data packets; adapter electronics configured to limit an energy provided via the field-device-internal interface to a predefined value and to charge a stored energy source with the limited energy. The adapter electronics are further configured to monitor a state of charge of the stored energy source and, based on the state of charge, to provide the radio module with an energy originating from the stored energy source for transmitting the data packet.

A method is provided for managing power for a wireless communication device. The method includes receiving a loop current at an insertion voltage at an initial input, the loop current being generated by a power supply. The method further includes comparing a reference voltage to the insertion voltage and generating a feedback signal based at least upon the comparison of the reference voltage to the insertion voltage. The method still further includes regulating the insertion voltage based at least upon the feedback signal, delivering charging power to an electrical storage element, wherein the charging power is a function of the insertion voltage and the loop current, and storing the charging power in the electrical storage element.

A method is provided for managing power for a wireless communication device. The method includes receiving a loop current at an insertion voltage at an initial input, the loop current being generated by a power supply. The method further includes comparing a reference voltage to the insertion voltage and generating a feedback signal based at least upon the comparison of the reference voltage to the insertion voltage. The method still further includes regulating the insertion voltage based at least upon the feedback signal, delivering charging power to an electrical storage element, wherein the charging power is a function of the insertion voltage and the loop current, and storing the charging power in the electrical storage element.