Input/output port fault diagnosing device

Details Input/output port fault diagnosing device Input/output port fault diagnosing device

1993-11-22

1996-08-13

Voeltz, Emanuel T.

Excavating

355203, G01R 3128

Patent

active

055464041

ABSTRACT:
A port diagnosing device capable of diagnosing normal or abnormal ports provided with a single input terminal and a plurality of output terminals comprising a signal generator for outputting predetermined signals to an optional output terminal from among a plurality of output terminals, a feedback signal for feeding back to the single input terminal predetermined signals output from the signal generator, and determining changes detected in the level of the signal fed back to the input terminal in correspondence to changes in the level of the predetermined signal, and determining the normal or abnormal operation of the optional output terminal.

REFERENCES:
patent: 4053794 (1977-10-01), Edwards
patent: 5239547 (1993-04-01), Tomiyama
patent: 5295141 (1994-03-01), Person
patent: 5317368 (1994-05-01), Shimomura et al.

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