Safety assurance of multiple redundant systems
US9618909B2 · kind B2 · utility
0Cited by
20References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Jul 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2005
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system, method, and safety unit provide safety assurance for a multiple redundant system controlling a plant or complex. A unit active line (UAL) status indicates the presence of at least one redundant active unit within the system. A safety verification line (SVL) status verifies the powered down status of all redundant units not active within the system. A safety unit is associated with a vital supervision card (VSC) and vital power bus and the safety unit controls switchable connections from the vital power bus to the UAL and the SVL. Based on verification of UAL and SVL status, system control includes energizing the UAL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.