Patent · US Active

Automation technology autarkic field device

US9442477B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

Endress+Hauser Process Solutions AG · CH

Inventors

Christian Seiler · Auggen, DE
Dirk Rapp · Steinen, DE

Key dates

Filing date	Oct 9, 2009
Grant date	Sep 13, 2016
Priority date	—
Expiry date	Feb 15, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG05B2219/25428
WIPO fieldControl
WIPO sectorInstruments

Abstract

An automation technology, autarkic, field device, which is connected via two connecting terminals to an I/O module. The I/O module is embodied as a 4-20 mA/HART I/O module. The I/O module is associated with a controllable energy source via which the field device is supplied with energy. An electrical current measuring unit is provided which ascertains the electrical current supplied by the energy source. In the I/O module, internal resistors are provided, across which occurs in each case a voltage drop dependent on the flowing electrical current. A control unit is provided, which operates the energy source in such a way that a predetermined terminal voltage is supplied on the connecting terminals for powering the field device.

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