Data communication system
First Claim
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1. A data communication system, comprising:
- (a) a first bus;
(b) a second bus;
(c) a central station, which includes;
(i) current source means, connected between said first and second bus, for providing a current onto said first bus;
(ii) first transmitter means, connected in a series arrangement with said first bus, for transmitting information onto said first bus;
(iii) first receiver means, connected in a series arrangement with said first bus, for receiving information on said first bus; and
(iv) first processor means, operatively connected to said first transmitter means and to said first receiver means, for processing information to be transmitted and received onto said first bus; and
(d) at least one substation, wherein each substation includes;
(i) second receiver means for receiving information transmitted from said central station, each second receiver means of each substation being connected in a series arrangement with said first bus;
(ii) second transmitter means for transmitting information to said central station, each second transmitter means of each substation being connected in a parallel arrangement between said first bus and said second bus; and
(iii) second processor means, each second processor means of each substation being operatively connected to its respective second receiver means and second transmitter means, for processing predetermined information received and transmitted onto said first bus, wherein said current from said current source is modulated according to a bit pattern of information by said first and second transmitter means.
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Abstract
A dialogue system uses a three wire bus connecting a central station with a plurality of substations with two of the wires carrying an AC supply voltage and a third one of the wires carrying data by means of a closed loop of the AC carrying wires and the third wire. The central station uses a series connection of a data transmitter and a data receiver with the third data wire and each substation includes a data receiver in series with the data wire and a data transmitter between the data wire and both AC wires.
36 Citations
11 Claims
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1. A data communication system, comprising:
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(a) a first bus; (b) a second bus; (c) a central station, which includes; (i) current source means, connected between said first and second bus, for providing a current onto said first bus; (ii) first transmitter means, connected in a series arrangement with said first bus, for transmitting information onto said first bus; (iii) first receiver means, connected in a series arrangement with said first bus, for receiving information on said first bus; and (iv) first processor means, operatively connected to said first transmitter means and to said first receiver means, for processing information to be transmitted and received onto said first bus; and (d) at least one substation, wherein each substation includes; (i) second receiver means for receiving information transmitted from said central station, each second receiver means of each substation being connected in a series arrangement with said first bus; (ii) second transmitter means for transmitting information to said central station, each second transmitter means of each substation being connected in a parallel arrangement between said first bus and said second bus; and (iii) second processor means, each second processor means of each substation being operatively connected to its respective second receiver means and second transmitter means, for processing predetermined information received and transmitted onto said first bus, wherein said current from said current source is modulated according to a bit pattern of information by said first and second transmitter means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification
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Current AssigneeHoneywell Regelsysteme GmbH (Honeywell International Inc.)
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Original AssigneeHoneywell Incorporated (Honeywell International Inc.)
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InventorsEhlers, Dieter, Kahle, Arno, Daab, Heinz, Scheler, Bernd
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Primary Examiner(s)Yusko, Donald J.
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Assistant Examiner(s)Pudpud, Eric O.
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Application NumberUS07/377,472Time in Patent Office799 DaysField of Search340/825.05, 340/825.57, 340/825.61, 340/825.62, 340/310 R, 340/310 A, 455/606, 455/613, 307/117, 307/311, 370/1, 370/4US Class Current370/527CPC Class CodesH04L 12/10 Current supply arrangementsH04L 12/40006 Architecture of a communica...H04L 12/403 with centralised control, e...H04Q 9/00 Arrangements in telecontrol...
