Patent · US Active

Single-channel safety output

US9368307B2 · kind B2 · utility

0Cited by

3References

19Claims

0Family size

Assignee

Rockwell Automation Germany GmbH & Co. KG · DE

Inventors

Dirk Lorenz · Wetter, DE
Norbert Machuletz · Wetter, DE
Rudolf Papenbreer · Wuppertal, DE
Thomas Helpenstein · Grevenbroich, DE

Key dates

Filing date	Apr 23, 2014
Grant date	Jun 14, 2016
Priority date	—
Expiry date	Aug 21, 2034

Classification

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

Abstract

A safety switching device for fail-safely switching on and off an electrical load, and to a system comprising at least two safety switching devices which interact in a fail-safe manner via a single-channel. The safety switching device comprises a fail-safe control unit, a first and a second electronic switching element connected with a first and a second output terminal; and at least one input terminal for receiving a first switching signal that causes a switching of said switching elements. Said first and second switching elements each comprise an output which provides depending on the first switching signal an output signal having a first or second potential. A third output terminal connects said safety switching device to a second safety switching device, providing a clocked signal depending on the first switching signal and being monitored by said control unit for performing a cross fault detection.

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