Intrinsically safe data transmission device
US7561392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/31135
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process control system (1) comprises at least one process control computer (2) and field units (4) connected thereto via a bus system. An, in particular, intrinsically safe data transmission device (5) is connected between the process control computer and the assigned field units. This data transmission device comprises a data adaptation device (6) and a data distributing device (7). In order to be able to connect more field units per data adaptation device while simultaneously reducing the costs per field unit, the data adaptation device (6) and its assigned supply devices (8) have an explosion-proof design, and each supply device is connected to the data distributing devices via an explosion-proof line, whereby these data distributing devices or field units connected thereto have a barrier device for limiting the applied power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.