Bus isolator for industrial control system providing intrinsical

Data processing: generic control systems or specific application – Generic control system – apparatus or process – Supervisory control

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700 1, 340310, G05B 1502, H04M 1104

Patent

active

061546798

ABSTRACT:
Low voltage logic circuitry is used to permit an entire subsystem of an industrial controller to be placed within a hazardous environment to receive a high speed serial link and undertake the control of multiple control points without expensive and awkward long cable runs and electrically isolating circuits for each cable run. Energy and bandwidth limiting on the high speed link allows power levels commensurate with high data rates yet intrinsic safety of the media allowing it to freely pass in and out of the hazardous area. A mixture of intrinsically safe and non-intrinsically safe equipment on the same logical rack is allowed through a bus isolator providing isolated data communication in backplane fashion between modules while wholly isolating power transmission along the backplane.

REFERENCES:
patent: 3973170 (1976-08-01), Hogan
patent: 5318065 (1994-06-01), Edwards et al.
patent: 5321597 (1994-06-01), Alacoque
patent: 5416908 (1995-05-01), DiCarlo et al.
patent: 5455467 (1995-10-01), Young et al.
patent: 6037857 (2000-03-01), Behrens et al.

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