System for identifying valid connections between electrical system components and responding to invalid connections
US6912678B1 · kind B1 · utility
12Cited by
2References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Oct 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/67
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and circuitry for ensuring proper connections of a multi-wired cable bridging two electrical components in a programmable logic controller (PLC) system. The method involves: generating a pre-specified voltage level when the cable is properly connected, testing for the existence of this pre-specified voltage level, and generating an error signal if the pre-specified voltage level is not detected. The error signal generated by a component causes the component to electronically switch off its data connection via the multi-wired cable with the other component, and may cause the component to reset itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.