Remote shutdown via fiber
US9128841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Apr 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method provide vital shutdown of a remote slave unit linked by a fiber optic connection to a local, checked redundant master unit with two paired computers. Each computer sends a life signal to an associated local vital supervision card (VSC) and copper to fiber converter (C/F converter) for transmission via fiber to a corresponding fiber to copper converter (F/C converter) on the slave unit, then to a corresponding remote VSC. Each local VSC controls power to a corresponding second local VSC-associated C/F converter, and each remote VSC controls power to a corresponding second remote VSC F/C converter. A VSC detecting an incorrect life signal signature removes power to the corresponding controlled converter and, optionally, to a respective local or remote I/O rack, thereby shutting down the slave unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.