Intrinsically safe galvanically isolated barrier device and method thereof
US7898786B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/25462
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for providing an intrinsically safe (IS) galvanically isolated barrier device. An IS barrier device provides IS galvanic isolation between a non-IS system and an IS system using a two-stage approach. In the first stage, a non-galvanically isolated IS barrier limits energy of electrical transmissions received from the non-IS system to convert such electrical transmissions into IS transmissions. In the second stage, the IS transmissions are transmitted through a galvanic isolator to the IS system to galvanically isolate the IS system from the non-IS system. A digital monolithic isolator cannot be IS certified to be the single bridge between IS and non-IS systems, however, it can be used in a certifiable fashion to isolate between IS systems. When used in conjunction with a non-galvanic IS barrier that is capable meeting the IS certification as non-IS to IS barrier, a digital monolithic isolator can be used to implement the galvanic isolator such that high speed, low cost galvanic isolation is possible. Such a galvanically isolated barrier device can be used to implement an IS galvanically isolated high speed communication bus for sample system control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.