EP0355532B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Arrangement for transmitting data and supply voltage via a bus
Assignee: Siemens AG
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Filing: 1989-08-04
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Granted: 1994-10-26
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Expires: 2009-08-04
Abstract
Abstract The devices (ST1, ST2 ... STn) of a bus system are in each case connected to the bus line (BL1, BL2) by means of a transformer (U1, U2 ... Un) which exhibits two windings (Wi1, Wi2) of the same number of turns which are connected with one of their connections to the bus line and with the other one of their connections to the series circuit of two capacitors (Ci1, Ci2) having identical capacitance. Data signals are coupled in and out via a third winding (Wi3). The supply voltages for the devices (ST1, ST2 ... STn) are supplied via the bus line (BL1, BL2) to the devices (ST1, ST2 ... STn) where they are picked up at the respected series circuit of the capacitors (Ci1, Ci2). The invention is used in the process equipment bus (field bus). <IMAGE>
Inventors
- 👤 Andreas Muhr
- 👤 Peter Dr. Thamm
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:05
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/10; H04B; H04B3/00; H04B3/54; H04B3/548; G; G05; G05B; G05B2219/00; G05B2219/20; G05B2219/23; G05B2219/23375; G05B2219/24; G05B2219/24028; G05B2219/25; G05B2219/25188; G05B2219/25462; H04B2203/00; H04B2203/54; H04B2203/5462; H04B2203/547; H04B2203/5483; H04L12/28; H04L12/40; H04L2012/40208
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
An arrangement for the transmission of data between a plurality of devices and the supply voltage for the devices via a bus line to which the devices and the supply voltage source are connected, characterised in that the devices (ST1, ST2...STn) are connected to the bus line (BL1, BL2) in each case by means of a transformer (U1, U2 .. Un) which possesses two windings (Wi1, Wi2) with the same number of turns, which are connected by their first terminals to the bus line (BL1, BL2) and between the other terminals of which is arranged a capacitance (Ci1, Ci2) from which the supply voltage is tapped, that transmitting- and receiving devices (V1, V2) are connected to a third winding (Wi3), and that the supply voltage source is connected to the bus line via two inductive resistors (SP1, SP2).
Claim 2
Dependent Claim
36 words
An arrangement as claimed in Claim 1, characterised in that the supply voltage source is contained in a device and the supply voltage is fed-in between the transformer windings (Wi1, Wi2) and the capacitance (Ci1, Ci2).
Claim 3
Dependent Claim
38 words
An arrangement as claimed in Claim 1 or 2, characterised in that the capacitance consists of the series connection of two capacitors (Ci1, Ci2) of the same capacitance, the connection of which is connected to a reference potential.
Claim 4
Dependent Claim
37 words
An arrangement as claimed in one of Claims 1 to 3, characterised in that the two transformer windings (Wi1, Wi2) are poled in such manner that the supply current magnetizes the transformer cores in the same direction.
Claim 5
Dependent Claim
61 words
An arrangement as claimed in one of Claims 1 to 3, characterised in that the two windings (Li1, Li2) of the transformers are poled in such manner that the magnetizations produced by the supply current cancel one another out, and that the bus line possesses a third wire, in particular a shield, to which the connections of the capacitors are connected.
Claim 6
Dependent Claim
44 words
An arrangement as claimed in one of Claims 1 to 5, characterised in that the series arrangement of the two transformer windings and the capacitance is connected in parallel with a diode (D1) operated in the blocking direction in respect of the supply voltage.
Claim 7
Dependent Claim
33 words
An arrangement as claimed in one of Claims 1 to 6, characterised in that the supply voltage is tapped via diodes (D2, D3) and fed to a capacitor (C3) serving as energy store.
Claim 8
Dependent Claim
24 words
An arrangement as claimed in Claim 7, characterised in that the supply voltage is fed to the capacitor (C3) via filter chokes (L2, L3).
Claim 9
Dependent Claim
53 words
An arrangement as claimed in one of Claims 1 to 8, characterised in that the devices (ST1, ST2 ...STn) each contain a d.c.-isolating d.c. voltage converter (SW1, SW2 ...SWn), the input of which is supplied with the supply voltage from the bus line and from which the respective device is supplied with current.
Claim 10
Dependent Claim
39 words
An arrangement as claimed in one of Claims 1 to 9, characterised in that a terminal resistor (Z L ) is connected to the third winding (Wn3) of the device (STn) which forms the terminal of the bus line.
Claim 11
Dependent Claim
36 words
An arrangement as claimed in Claim 10, characterised in that the number of turns of the third winding (Wn3) is greater than the sum of the number of turns of the two other windings (Wn1, Wn2).
References Cited (Backward Citations)
No citation records indexed.
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