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    • 3. 发明专利
    • CONTACT OUTPUT CIRCUIT FOR INSTRUMENTATION CONTROLLER
    • JPS54112464A
    • 1979-09-03
    • JP2045278
    • 1978-02-23
    • NIPPON ELECTRIC CO
    • ATSUMI HIROSHIIYODA TAKAFUMI
    • H04L25/02G05B23/02G08B1/08G08C19/16H04L1/08H04Q9/00
    • PURPOSE:To simplify the configuration of a contact output circuit, by permitting of performing contact output from the identical contact output circuit without hindrance even if 1-bit information and 2-bit information are mixed in an identical group. CONSTITUTION:An instrumentation controller enters state supervisory information on the open/close of valve and the stop/run of pump in parallel into a supervisory input circuit 1 and transmits the information to a reception circuit through a parallel-seriese convertion circuit 2, a signal tramission circuit 3 and a transmission circuit 4. The signal demodulated by the reception circuit 5 is entered into the contact output circuit 7 through a series-parallel conversion circuit 6 and is temporarily stored in the circuit 7. The contact output of the stored signal is effected after the two-bit inspection of the signal. The contact output circuit 7 comprises a storage circuit 8 and a relay circuit 9. When 1-bit information is sent out from the contact output circuit 7, a terminal Si (i=1-n) is used as a common therminal and outputs are picked out from terminals M2i-1, M2i. When 2-bit information is sent out from the circuit 7, a terminal Bi is used as a common terminal and an output is picked out from the terminal M2i-1.