Safety switching arrangement
US6417582B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety switching arrangement has at least two break switches (12a, 12b, 12c) which are connected in series to an evaluation unit (11), in which case the evaluation unit (11) initiates a safety signal, in particular an alarm signal and/or disconnection signal, when at least one of the break switches (12a, 12b, 12c) opens, and determines which of the break switches (12a, 12b, 12c) has opened. At least one, and preferably all, of the break switches (12a, 12b, 12c) has or have an associated code signal generator (13a, 13b, 13c) which, when the associated break switch (12a, 12b, 12c) opens, supplies to the evaluation unit (11) a code signal which is characteristic of the relevant break switch (12a, 12b, 12c) via a line, in particular a diagnosis line (15) or safety line sections (16a, 16b, 16c), which leads to the evaluation unit (11) and is common to all the break switches (12a, 12b, 12c) associated with a code signal generator (13a, 13b, 13c), which code signal is analyzed in the evaluation unit (11) and is identified as coming from the relevant break switch (12a, 12b, 12c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.