Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-10-05
1987-02-17
Weldon, Ulysses
Communications: electrical
Continuously variable indicating
With meter reading
34082506, 34082504, G08B 522, G08B 500, G01J 134
Patent
active
046443460
ABSTRACT:
The present invention consists in disposing a first transmission unit in a control panel which is installed in a central control room, and a second transmission unit in a control device which is installed near an equipment to-be-controlled of a plant. The first transmission unit and the second transmission unit are connected by a cable. Each of the first transmission unit and the second transmission unit comprises a transmitter, a receiver, a serializer, a deserializer, change-over means and change-over control means. The serializer, which produces a serial information signal wherein a plurality of received information signals are arrayed in series, is connected to the transmitter. The deserializer separates a serial information signal delivered from the receiver, into a plurality of information signals. The plurality of change-over means connect a plurality of signal transmission cables respectively connected thereto, to the serializer or the deserializer. The plurality of change-over control means control connectional statuses of the corresponding change-over means on the basis of the respective information signals separated and delivered by the deserializer.
REFERENCES:
patent: 3162809 (1964-12-01), Yax
patent: 4112416 (1978-09-01), Hasegawa et al.
Arita Setsuo
Ito Tetsuo
Hitachi , Ltd.
Smith Ralph
Weldon Ulysses
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