AUTARKES FELDGERAT ORDER AUTARKER FUNKADAPTER FUREIN FELDGERAT DER AUTOMATISIERUNGSTECHNIK

• US 20100244806A1
• Filed: 08/03/2009
• Published: 09/30/2010
• Est. Priority Date: 08/06/2008
• Status: Active Grant

• Current Assignee: Endress+Hauser Process Solutions AG (Endress+Hauser AG)
• Original Assignee: Endress+Hauser Process Solutions AG (Endress+Hauser AG)
• Inventors: Probst, Stefan, Fiedler, Marc
• Granted Patent: US 8,355,689 B2
• Time in Patent Office: Days
• US Class Current: 323/304
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 2219/25462 Galvanic separation, galvanic isolation
• CPC Class Codes: G05B 9/02 electric

Abstract

The invention relates to an autarkic field device or an autarkic radio adapter (2) for a field device (1), of automation technology fed with limited energy via an energy supply unit (3) associated, or associable, with the field device (1) or the radio adapter (2), characterized in that, between the energy supply unit (3) and an internal voltage source (4), whose voltage exceeds, or at times can exceed, the voltage of the energy supply unit (3), a barrier (5a; 5b) of at least one diode group having at least two diodes (6) connected in parallel is arranged, which blocks flow of electrical current from the internal voltage source (4) to the energy supply unit (3) or to the connection terminals (7) of the field device (1) or of the radio adapter (2) for the energy supply unit (3).

Claims

1. Autarkic field device, or autarkic radio adapter (2) for a field device (1), of automation technology fed with limited energy via an energy supply unit (3) associated, or associable, with the field device (1) or the radio adapter (2), characterized in that, between the energy supply unit (3) and an internal voltage source (4), whose voltage exceeds, or at times can exceed, the voltage of the energy supply unit (3), a barrier (5a;

5b) of at least one diode group having at least two diodes (6) connected in parallel is arranged, which blocks a flow of electrical current from the internal voltage source (4) back to the energy supply unit (3) or to the connection terminals (7) of the field device (1) or of the radio adapter (2) for the energy supply unit (3).

2. Field device as claimed in claim 1, characterized in that, associated with the field device (1) or the radio adapter (2) is a radio module (10) and the field device (1) communicates via the radio module (10) and a radio network (RN) with a superordinated control unit (13).

3. Field device as claimed in claim 2, characterized in that the radio module (10) is integrated in the radio adapter (2), or in a wireless adapter, which is connected with the field device (1) via a first interface (7a) provided on the field device (1) and a second interface (7b) provided on the radio adapter (2) and corresponding connecting lines (14).

4. Field device as claimed in claim 3, characterized in that the energy supply unit (3) is integrated in the radio adapter (2), and data exchange and energy supply between the energy supply unit (3) and the radio adapter (2) occur via the same two connecting lines.

5. Field device as claimed in claim 1, characterized in that the energy supply unit (3) and the radio module (10) are integrated in the field device (1).

6. Field device as claimed in claim 1, characterized in that the barrier (5a, 5b) is composed of three diode pairs connected in series, wherein the diodes (6) of a diode pair are connected in parallel.

7. Field device as claimed in claim 1 or 5, characterized in that the diodes (6) are Schottky diodes.

8. Field device as claimed in one or more of claim 1-3 or 5-6, characterized in that the diodes (6) of the diode pairs, or the diode groups, are so embodied that, in the case of a disconnection of the energy supply unit (3) from the field device (1) or from the radio adapter (2), a maximum 40 μ

J, or 40 μ

Vas, reach connection terminals (7a) of the field device (1), or connection terminals (7b) of the radio adapter (2), especially to the connection terminals of the associated energy supply unit.

9. Field device as claimed in claim 1, 3, 4 or 7, characterized in that the energy supply unit (3) is a disposable battery, a fuel cell, a solar energy supply, or a rechargeable battery.

10. Field device as claimed in claim 1, characterized in that communication between the field device (1) or the radio adapter (2) and the superordinated control unit (13) occurs based on a communication protocol customarily used in automation technology.