Diode safety barrier

Details Diode safety barrier Diode safety barrier

1986-12-10

1988-08-09

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 73R, 324158R, G01R 2702

Patent

active

047630698

ABSTRACT:
There is disclosed a barrier in which two or more Zener diodes are mounted in parallel in an encapsulated module between the leads from an input/output terminal located in a safe area to or input/output terminal in a hazardous area such as an environment having an explosive mixture of gases or dust, and a current-limiting resistor in series with an interconnected end of said diodes, wherein the circuit elements in the encapsulated module are connected individually at each end to one of a series of input/output pins extending from said module whereby they can be individually tested and the pins are adapted to be interconnected selectively externally of said module to complete the barrier circuit.

REFERENCES:
patent: 3956698 (1976-05-01), Malmberg et al.
patent: 4230986 (1980-10-01), Deaver et al.
patent: 4301403 (1981-11-01), Hawkes et al.
patent: 4691384 (1987-09-01), Jobe
"The Memory Leader Offering the Fastest Memory Available; Byte; Nov. 1984; p. 165.

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