Independent field device for automation purposes with intrinsic safety barrier

摘要

An autarkic field device or an 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. Between the energy supply unit and an internal voltage source, whose voltage exceeds, or at times can exceed, the voltage of the energy supply unit, a barrier of at least one diode group having at least two diodes connected in parallel is arranged, which blocks flow of electrical current from the internal voltage source to the energy supply unit or to the connection terminals of the field device or of the radio adapter for the energy supply unit.

主权项

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 of said internal voltage source exceeds, or at times can exceed, the voltage of the energy supply unit; and said barrier blocks a flow of electrical current from said internal voltage source back to the energy supply unit or to said connection terminals of the field device or of the radio adapter for the energy supply unit.