Interfacing circuit

Details Interfacing circuit Interfacing circuit

1976-04-14

1977-05-31

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

H01H 4704

Patent

active

040272087

ABSTRACT:
An interfacing circuit for use in industrial control systems which provide one or more control signals of low power level from integrated semiconductor circuits. The low power level control signals initiate operation of the interfacing circuit to complete a current path from a power source to an electrical load in the control system. Buffer circuits are provided as a part of the interfacing circuit for receiving the lower power level control signals. A reed relay is operated initially by the low power level signals. The relay has a normally open set of contacts which when operated completes the current path from a power source to the electrical load. The interfacing circuit includes a holding current path for the relay. A number of diodes are provided in the interfacing circuit for preventing unwanted current flow in various areas of the circuit under certain circumstances.

REFERENCES:
patent: 3097307 (1963-07-01), Bonn
patent: 3400304 (1968-09-01), Ziegler
patent: 3931550 (1976-01-01), Dalpee

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