Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1994-02-17
1996-03-05
DeBoer, Todd
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 66, 361 86, 370 851, H02H 300
Patent
active
054972841
ABSTRACT:
The disclosure relates to the methods and devices that enable series type buses to be protected against the consequences of a short-circuit in the decentralized units connected to this bus. There are provided means to detect the equalization of the potentials of the data wires and means enabling the disconnection, under the control of these detection means, of the decentralized unit responsible for the short circuit. A device is also provided to short circuit the supply wires of the bus according to a predetermined sequence in order to inform the central processing unit of the disconnection of said decentralized unit. The disclosure enables the protection of the central processing unit and of the decentralized units, connected to the bus, that are not malfunctioning.
REFERENCES:
patent: 4406007 (1982-09-01), Kister et al.
patent: 4752698 (1988-06-01), Furuyama et al.
patent: 5341268 (1994-08-01), Ishiguro et al.
EDN Electrical Design News, vol. 36, No. 11, 23 May 1991, Newton, MA, "Data line senses remote shorts".
DeBoer Todd
Driscoll David M.
Giunta Richard F.
Morris James H.
SGS-Thomson Microelectronics S.A.
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