Input overload protection for multiple input controller
US6456473B1 · kind B1 · utility
5Cited by
11References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/06
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A current loop input overload protection system for a controller having multiple inputs includes zener diodes that limit the maximum voltage that can be applied to any input. If an electrical short of a temperature, pressure or humidity transducer forces an input to the maximum voltage, an electrical supply monitor immediately disables the transducer's power supply to protect the input components. After awhile, the overload protection system automatically and periodically attempts to reset the power supply to determine whether the short has been corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.