Patent ID: 9000610
Filing Date: 2015-04-07
Classification: G05B,H02H,H04L,Y02B,Y04S

Abstract:
1. 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.