Patent ID: 8355689
Filing Date: 2013-01-15
Classification: G05B

Abstract:
1. An autarkic field device, or autarkic radio adapter for a field device, of automation technology fed with limited energy via an energy supply unit associated, or associable, with the field device or the radio adapter comprising: connection terminals; an internal voltage source; and a barrier of at least one diode group having at least two diodes connected in parallel, said barrier being situated between the energy supply unit and said internal voltage source wherein: the voltage exceeds, or at times can exceed, the voltage of the energy supply unit; said barrier blocks a flow of electrical current from said internal voltage source back to the energy supply unit or to the connection terminals of the field device or of the radio adapter for the energy supply unit; said diodes of said diode pairs, or said diode groups, are so embodied that, in the case of a disconnection of the energy supply unit from the field device or from the radio adapter, a maximum 40 μJ, or 40 μVA