Compatible interface for domestic industrial and professional devices control

• US 5,684,449 A
• Filed: 05/23/1995
• Issued: 11/04/1997
• Est. Priority Date: 05/24/1994
• Status: Expired due to Term

• Current Assignee: SGS-Thomson Microelectronics (STMicroelectronics NV)
• Original Assignee: SGS-Thomson Microelectronics (STMicroelectronics NV)
• Inventors: Le Van Suu, Maurice Gilbert
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US08/447,364
• Time in Patent Office: 896 Days
• Field of Search: 340/310.01, 340/310.02, 340/310.06, 340/310.08, 375/36, 375/37, 375/360, 375/38, 455/3.3
• US Class Current: 340/12.32
• CPC Class Codes: H04L 12/40045 Details regarding the feeding of energy to the node from the bus
• CPC Class Codes: H04L 12/407 with decentralised control
• CPC Class Codes: H04L 2012/4026 Bus for use in automation systems

Abstract

A compatible interface for an installation to control household machines that comprises an omnibus line having at least two first line wires used for a supply current, information signals being transmitted on the two first wires and/or on two second line wires, wherein said interface comprises: a circuit to recognize whether information signals are sent on the two first wires or on the two second wires and to transmit a reception identification signal to a household machine; and a current regulation circuit connected to the two first wires to give a stabilized current supply even if information signals are transmitted on the two second wires. Applications include control of household (home automation), industrial, or professional installations.

Claims

1. Interface compatible with an installation for controlling domestic, industrial or professional appliances, the installation comprising either a two-wire bus having a first pair of wires for a supply current, information signals being transmitted on this pair of wires, or a four-wire bus having a first pair of wires for a supply current and a second pair of wires for information signals being transmitted, said interface comprising:

a circuit for recognizing whether information signals are transmitted on said first pair of wires of said two wire bus, or on said second pair of wires, of said four wire bus, and for transmitting a reception identification signals to a domestic appliance;

a current regulation circuit connected to said first pair of wires in order to provide a stabilized current supply to the appliance even if the information signals are transmitted on said first pair of wires;

and a control circuit connected to said first pair of wires in order to modulate the current on said first pair of wires in accordance with a signal which is transmitted to it by the appliance.

2. Interface according to claim 1, designed either to supply a first type of domestic appliance, which is compatible with a two-wire bus, and to transmit information via said first pair of wires to this first type of domestic appliance, or to provide a power supply via said first pair of wires to a second type of domestic appliance, which is compatible with a four-wire bus, and additionally to transmit information via said second pair of wires to said second type of domestic appliance, wherein said interface comprises:

two first input terminals connectable to said first pair of wires;

two second input terminals connectable to said second pair of wires;

two second output terminals connected to said two first input terminals and designed to supply power to said first type of appliance;

two second output terminals connected via a current regulation circuit to said two first input terminals and designed to supply power to said second type of appliance;

two third output terminals connected to said second input terminals and designed to transmit information to said second type of appliance.

3. Interface according to claim 2, further comprising a modulation device connected to said first pair of wires, and a fourth output terminal enabling an appliance of said second type, sending modulation control signals on said fourth output terminal, to transmit signals on the two-wire bus.

4. Interface according to claim 3, further comprising a fifth output terminal enabling an appliance of said first type to transmit a modulation control signal.

5. Interface according to claim 3, wherein said modulation device has a transistor making it possible to short-circuit said two first input terminals.

6. Interface according to claim 2, further comprising:

a current modulation detector connected to at least one of the two first input terminals and detecting given modulations transmitted to this input terminal;

and a sixth output terminal connected to said current modulation detector and making it possible to transmit detected modulation signals to an appliance of said first type.

7. Interface according to claim 6, further comprising a seventh and an eighth output terminal connected to the modulation device and making it possible to transmit a detection signals respectively to an appliance of the first type and to an appliance of the second type.

8. Interface according to claim 1, wherein the two-wire bus is equipped at different points with connectors for the connection of appliances, each connector having an interface and having as many output terminals as the interface.

9. Interface according to claim 1, wherein the two-wire bus is equipped at different points with connectors for the connection of appliances, each connector having as many connection pins as the bus has usable wires, the interface being in a connection box, and appliances being connectable to the output terminals of the interface.

10. Interface according to claim 2, further comprising a reception circuit connected to the second input terminals and supplying information signals on the third output terminals to the second type of appliance or on a ninth output terminal to the first type of appliance.

11. Interface for a system for controlling domestic, industrial or professional appliances, said interface comprising:

a first connector for receiving a first pair of wires;

a second connector for receiving a second pair of wires;

a circuit for recognizing whether information signals are transmitted through said first connector or through said second connector and for transmitting a reception identification signal to the appliance;

a current regulation circuit connected to said first connector in order to provide a stabilized current supply to the appliance even if said information signals are transmitted through said first connector; and

a control circuit connected to said first connector in order to modulate the current through said first connector in accordance with a signal which is transmitted to it by the appliance;

wherein said interface may be connected either to a two-wire bus via said first connector or to a four-wire bus via both said first and said second connectors without needing external adjustments.

12. The interface of claim 11, wherein said two-wire bus has a first pair of wires used both for the supply current and for the transmission of information signals.

13. The interface of claim 11, wherein said four-wire bus has a first pair of wires for the supply current and a second pair of wires for information signals being transmitted.