Patent · US Active

Independent field device for automation purposes with intrinsic safety barrier

US8847429B2 · kind B2 · utility

0Cited by

2References

9Claims

0Family size

Assignee

Endress+Hauser Process Solutions AG · CH

Inventors

Stefan Probst · Buchdorf, DE
Marc Fiedler · Los Angeles, US

Key dates

Filing date	Sep 13, 2012
Grant date	Sep 30, 2014
Priority date	—
Expiry date	Sep 13, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG05B2219/25462
WIPO fieldControl
WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.