Patent · US Active

Signaling device for a safety circuit

US7948391B2 · kind B2 · utility

11Cited by

8References

22Claims

0Family size

Assignee

Pilz GmbH & Co. KG · DE

Inventors

Jürgen Pullmann · Großenhain, DE
Christoph Zinser · Wolfschlugen, DE
Günter Hornung · Echterdingen, DE
Jürgen Fleiner · Reutlingen, DE

Key dates

Filing date	Oct 16, 2006
Grant date	May 24, 2011
Priority date	—
Expiry date	Nov 10, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH01H47/004
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A signaling device for a safety circuit has an input part for receiving an external state variable, at least one switching element and a control part. The control part controls the at least one switching element as a function of the external state variable, such that a signal applied to the input is communicated to the output. According to one aspect of the invention, the input of the switching element is internally connected to a fixed potential, preferably a fixed High potential. In a safety circuit for turning off a hazardous installation, such signaling devices are connected in series with one another to a safety controller. In such an arrangement, the control part of the downstream second signaling device also controls its switching elements as a function of the output of the first signaling device.

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