D.C. Switch circuit

Details D.C. Switch circuit D.C. Switch circuit

1980-06-12

1982-05-11

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

330207P, H02H 300

Patent

active

043297307

ABSTRACT:
A circuit for a switch which receives an input from a sensor head (18) such as a proximity sensor, limit switch, or other type of condition-responsive sensor. In its most complex form the circuit includes a power supply/regulator (24), an output load current source (12), an output load current sink (14), input logic (16) to receive the signal from the sensing head, a selector (10) to determine whether the source and sink will be normally open or normally closed, and a device (26) for checking the outputs for faults and indicating the presence of such. Other circuits include certain combinations of these parts or variations of these parts.

REFERENCES:
patent: 3295020 (1966-12-01), Borkovitz
patent: 3987316 (1976-10-01), Bogel et al.
patent: 4057299 (1977-11-01), Jones
patent: 4268884 (1981-05-01), Ford, Jr. et al.

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