Powered communication link

Details Powered communication link Powered communication link

1989-02-01

1990-05-15

Crosland, Donnie L.

Communications: electrical

Systems

Selsyn type

340505, 340507, 340310R, 340538, 340518, 34082506, 34087039, H04M 1104, G08B 2600

Patent

active

049261584

ABSTRACT:
A powered communications link between a central controller and a remote substation along a conductor that includes a movable or intermittent contact interacting therebetween includes a power supply located at the central controller for supplying electrical power over the conductor to the remote substation and an electrical power storage device at the remote substation for storing the power supplied over the conductor. Data and power are multiplexed over the conductor by the central controller which periodically stops the application of power to the conductors to permit a transmitter at the remote substation to send data to the central controller. A switch at the remote substation connects the power storage device to the conductor when power is being sent and disconnects it at all other times.

REFERENCES:
patent: 4093946 (1978-06-01), Fowler
patent: 4144528 (1979-03-01), Johnson, Sr.
patent: 4463352 (1984-07-01), Forbes et al.
patent: 4468655 (1984-08-01), Iwata
patent: 4535401 (1985-08-01), Penn
patent: 4613848 (1986-09-01), Watkins
patent: 4788527 (1988-11-01), Johansson

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