Auto isolation circuit for malfunctioning current loop

Details Auto isolation circuit for malfunctioning current loop Auto isolation circuit for malfunctioning current loop

1988-10-11

1990-07-03

Atkinson, Charles E.

Excavating

371 206, G06F 1100

Patent

active

049397303

ABSTRACT:
In a data communication system including a plurality of remote units under the control of a master controller, whereby each of the remote units operates to transmit and receive data from the master controller, an interface circuit for connecting each remote unit to the controller includes a switching transistor operable via a timing network for turning on to apply a high level signal continuously on the remote data output terminal of the associated interface circuit, for effectively isolating the malfunctioning remote transceiver, while permitting normal system operation without interference from the malfunctioning unit.

REFERENCES:
patent: 3445811 (1969-05-01), Hashimoto et al.
patent: 3579275 (1971-05-01), Polkinghorn et al.
patent: 3716834 (1973-02-01), Adams
patent: 3876983 (1975-04-01), Zafiropulo et al.
patent: 3974403 (1976-08-01), Georgopoulos
patent: 4245343 (1981-01-01), Frey
patent: 4264894 (1981-04-01), Ellington
patent: 4685113 (1987-08-01), Hono et al.
patent: 4723241 (1988-02-01), Grobel et al.

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