Safety switching device for setting a safety-related device to a safe state
US9239572B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2012 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jul 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety switching device, with which a safety-related device, can be set into a safe state. The safety switching device has a microprocessor or microcontroller, which can set an electric drive to be protected into a safe state both if an emergency circuit breaker, protective door switch, and/or two-hand switch is activated and also if there is faulty operation of the safety-related device or electric drive. For this purpose, the microprocessor is implemented such that it can determine from at least one analog signal to be measured whether a predetermined parameter lies outside a predetermined operating range. In addition, the microprocessor can be a component of a safety device which is constructed for multiple-channel control of a safety-related electric drive. In this way, the safety switching device can respond to several safety functions independent of each other in order to set an electric drive into a safe state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.