Non-actuating relay driver tester

Details Non-actuating relay driver tester Non-actuating relay driver tester

1989-11-14

1990-10-02

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electromechanical switching device

324418, 361186, 361187, G01R 3100, H01H 4700

Patent

active

049610511

ABSTRACT:
By providing control logic for initiating a predetermined test sequence depending upon the known state of a relay, a unique testing circuit is attained whereby the relay drivers connected to the opposed sides of the relay coil are fully evaluated without causing the relay to be activated. In the preferred embodiment, the relay comprises a latching-type relay and the relay drivers comprise separate high-power CMOS devices. In this configuration, the control logic separately activates each transistor of each of the high-power CMOS devices without causing the relay to be switched between its two alternate configurations. Furthermore, the control logic originally sets the latching-type relay into one of its two configurations and then shuts off the power until activated for initiating the test sequence. In addition, the control logic is employed to check each transistor during the test sequence and assure its operation.

REFERENCES:
patent: 3548301 (1970-12-01), Zutkis
patent: 3599179 (1971-08-01), Arnold
patent: 3633016 (1977-01-01), Walker et al.
patent: 3924178 (1975-12-01), Lockyer et al.
patent: 4696785 (1987-09-01), Cook et al.
patent: 4701635 (1987-10-01), Kawazoe et al.
patent: 4764884 (1988-08-01), Noyori

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