Field device for a process automation system having an intrinsically safe power supply device
AssigneeABB Technology AG
InventorsHarald U. Müller, Yannick Maret
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a field device of a process automation system, having at least one first intrinsically safe power supply unit, which provides locally stored electrical energy in an integrated storage element for supplying power to an electronics unit for process control. To supply power to intrinsically safe field devices from locally stored electrical energy in line with demand, it is proposed that in addition, at least one additional intrinsically safe power supply unit is integrated therein, which is fed by a power generation unit providing locally renewable electrical energy.
Claims17
A field device of a process automation system, comprising:
- an electronics unit configured for process control of the field device;
- at least one first intrinsically safe power supply unit including an integrated storage element configured for storing locally stored electrical energy, the at least one first intrinsically safe power supply unit being configured for supplying power via the integrated storage element to the electronics unit;
- at least one second intrinsically safe power supply unit integrated in the field device and including a power generation unit configured for feeding the at least one second intrinsically safe power supply unit with locally renewable energy for the at least one second intrinsically safe power supply unit to supply the locally renewable electrical energy to the electronics unit;
- and
- electrical switching means for, during normal operation, switching the at least one second intrinsically safe power supply unit over to the electronics unit in priority over the at least one first intrinsically safe power supply unit.
Dependencies are inferred from the claim text.