Safe input circuit with one-channel peripheral connection for the input of a bus participant
US7719255B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Jun 16, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017572
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An input circuit for an input component is disclosed for enabling the safe reading of input signals applied to the input component. The disclosed input circuit for an input component, particularly a bus input component, enables the safe reading of input signals applied to the input component, particularly according to the standards Category 4 DIN EN 954 and SIL 3 IEC 61508, which is characterized by at least one signal input circuit with a one-channel periphery connection for the connection of at least one signal generator, an evaluation circuit, which can be connected electrically to the signal input circuit via a first coupling element, and a comparison circuit, which is connected electrically to the signal input circuit, for setting a reference voltage for the activation and deactivation of the coupling element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.