JP2002152222A - Ha interface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an HA(home automation) interface, that can easily revise the connection between a device and an interface unit, through direct connections or through the use of an HA extension terminal using a small number of components. SOLUTION: Commonly using a 1st photocoupler 5 and a 2nd photocoupler 9, provided to a 1st circuit to directly connect a device 1 to an IFU(Interface Unit) 2 and a 1st photocoupler 5 and a 2nd photocoupler 9 provided to a 2nd circuit, that interconnects the device 1 and the IFU 2 via the HA extension terminal 13 can changeover the 1st and 2nd circuits by using switches 6a, 6b, 6c, 6d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an HA interface for connecting devices constituting a home automation system (HA system) that organically cooperate with home devices and an interface unit (IFU).

[0002]

2. Description of the Related Art An interface unit (hereinafter referred to as IFU) provided between a device 21 such as a room air conditioner and a controller (not shown) for controlling and monitoring the device via a home bus (not shown). The length of the connection lines 23a, 23b, 23c and 23d for interconnecting the cable 22 is specified to be within 1.9 m according to the Japan Electrical Manufacturers' Association standard JEM1427. Therefore, when the distance between the device 21 and the IFU 22 is longer than 1.9 m, the connection is made via the HA extension terminal 24.
2 home automation interfaces (H
A circuit).

More specifically, when the device 21 is directly connected to the IFU 22, a control circuit 25 for transmitting a control signal from the IFU 22 to the device 21 to control the device 21 as shown in FIG. Are connected to the internal circuit of the IFU 22, the first connection line 23a connected to the collector of the transistor of the first photocoupler 26, and the second connection line 23b connected to the emitter.
Are out of the IFU 22. In addition, in order to display the operation state / stop state of the device 21, the IFU
A monitor circuit 27 that transmits a monitor signal to the second connection line 23c includes a third connection line 23c in which the transistor of the second photocoupler 28 is connected to the internal circuit of the IFU 22 and the anode of the light emitting diode of the second photocoupler 28 is connected. And a fourth connection line 23d connected to the cathode is output from the IFU 22. The four connection lines 23a, 23b, 23c, 23d output from these IFUs 22 are provided with headers 29 at the ends, and are connected to sockets 30 provided in the device 21.

[0004] The equipment 21 and I using the HA extension terminal 24
When connecting the FU22, as shown in FIG.
5 indicates that the light emitting diode of the first photocoupler 26 has an IF
Connected to the internal circuit of U22,
The power supply 31 is connected to the collector of the transistor, and the first connection line 23a is connected to the emitter of the transistor, and the transistor is output from the IFU 22. An HA extension terminal 24 is provided at the end of the first connection line 23a.
Is connected to the anode of the light emitting diode of the third photocoupler 32. The second connection line 23 connected to the cathode of the light emitting diode of the third photocoupler 32
b is output from the HA extension terminal 24 and grounded inside the IFU 22. The first extension line 33a is connected to the collector of the transistor of the third photocoupler 32, the second extension line 33b is connected to the emitter, and the HA extension terminal 2
Departure from 4. In the monitor circuit 27, the transistor of the second photocoupler 28 is connected to the internal circuit of the IFU 22, the power supply 34 is connected to the anode of the light emitting diode of the second photocoupler 28, and the third is connected to the cathode of the light emitting diode. The connection line 23c is connected to the IFU 22
It is departing from. The third connection line 23c is connected to the collector of the transistor of the fourth photocoupler 35 inside the HA extension terminal 24. Fourth connection line 23 connected to the emitter of the transistor of fourth photocoupler 35
d is output from the HA extension terminal 24 and grounded inside the IFU 22. A third extension line 33c is connected to the anode of the light emitting diode of the fourth photocoupler 35, and a fourth extension line 33d is connected to the cathode of the light emitting diode. The four extension lines 33a, 33b, 33c, 33d output from these IFUs 22 are provided with headers 36 at their ends, and are connected to sockets 30 provided in the device 21.

[0005]

Since the circuit of the HA interface is different between the case where the device and the IFU are directly connected and the case where the device and the IFU are connected using the HA extension terminal, the circuit is changed by disassembling the IFU. Therefore, there is a problem that switching between direct connection and connection using the HA extension terminal is very troublesome. In addition, these 2
When one circuit is incorporated in the IFU, the number of components increases.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional HA interface, an object of the present invention is to directly connect a device to an interface unit with a small number of parts or to connect using an HA extension terminal. It provides an HA interface that can be easily changed, and its structure is composed of equipment such as a room air conditioner,
In an HA interface of a home automation system including a controller for controlling / monitoring a device via a home bus and an interface unit for matching interface conditions between the device and the home bus, the device and the interface unit are directly connected to each other. A photocoupler provided in a first circuit for connection and a photocoupler provided in a second circuit for connecting a device and an interface unit via an HA extension terminal are shared and used as a first circuit. And the second circuit is switched by the switching means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A control circuit for transmitting a control signal from an IFU to a device to control the device includes a light emitting diode of a first photocoupler connected to an internal circuit of the IFU.
A power supply or a first switch capable of switching connection with a first connection line is connected to a collector of the transistor of the first photocoupler, and a first connection line or ground is connected to an emitter of the transistor of the first photocoupler. A second switch that can switch the connection with the second connection line is connected, and the IFU is connected to the device to display the operation state / stop state of the device.
In the monitor circuit for transmitting the monitor signal to the second circuit, the transistor of the second photocoupler is connected to an internal circuit of the IFU, and the anode of the light emitting diode of the second photocoupler can be switched between a power supply and a third connection line. A third switch is connected, and a fourth switch is connected to the cathode of the light emitting diode of the second photocoupler so that the connection can be switched between the third connection line and the fourth connection line. Equipment and IF
Switching of direct connection of U or connection between the device and the IFU via the HA extension terminal is performed by a switch.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the HA interface according to the present invention will be described with reference to the accompanying drawings of FIGS.

A device 1 such as a room air conditioner, a controller (not shown) for controlling and monitoring the device 1 via a home bus, and an IFU 2 for matching interface conditions between the device 1 and the home bus. The home automation system HA interface
The control circuit 3 includes a control circuit 3 for transmitting a control signal from the IFU 2 to the device 1 for controlling the device 1 and a monitor circuit 4 for transmitting a monitor signal from the device 1 to the IFU 2 for displaying an operation state / stop state of the device 1. ing.

In the control circuit 3, the light emitting diode of the first photocoupler 5 is connected to the internal circuit of the IFU 2, the collector of the transistor of the first photocoupler 5 is connected to the first switch 6a, and the power source 7 or the second The connection with one connection line 8a can be switched. The emitter of the transistor of the first photocoupler 5 is connected to the second switch 6b.
Are connected, and the connection with the first connection line 8a or the grounded second connection line 8b can be switched.

In the monitor circuit 4, the transistor of the second photocoupler 9 is connected to the internal circuit of the IFU 2, the anode of the light emitting diode of the second photocoupler 9 is connected to the third switch 6c, and the power supply 10 or the 3 connection line 8c
And connection can be switched. The cathode of the light emitting diode of the second photocoupler 9 is connected to a fourth switch 6d so that the connection can be switched between the third connection line 8c and the fourth connection line 8d. First switch 6a, second switch 6b, third switch 6
c and the fourth switch 6d are all linked.

A first circuit for directly connecting the device 1 and the IFU 2 switches a first switch 6a, a second switch 6b, a third switch 6c, and a fourth switch 6d, each of which is connected to a first switch. Connecting line 8a, second connecting line 8b, third line
Connection line 8c and the fourth connection line 8d. The first connection line 8a, the second connection line 8b, the third connection line 8c, and the fourth connection line 8d are output from the IFU 2, and a header 11 is provided at the end. The header 11 is connected to a socket 12 provided on the device 1.

When the control signal is output from the IFU 2, a current flows through the light emitting diode of the first photocoupler 5, the transistor of the first photocoupler 5 turns on, and the control circuit 3 turns on the first connection line 8a. A current flows through the second connection line 8b, and a control signal is transmitted to the device 1. The monitor circuit 4
When the monitor signal is output from the device 1, the third connection line 8c
Then, a current flows through the fourth connection line 8d to turn on the light emitting diode of the second photocoupler 9, and when the light emitting diode is turned on, the transistor of the second photocoupler 9 turns on and a monitor signal is transmitted to the IFU2. You.

A second circuit for connecting the device 1 and the IFU 2 using the HA extension terminal 13 includes a first switch 6a, a second switch 6b, a third switch 6c, and a fourth switch. 6d, the first switch 6a is connected to the power supply 7, the second switch 6b is connected to the first connection line 8a,
The third switch 6c is connected to the power supply 10 and the fourth switch 6d
Is connected to the third connection line 8c. A first connection line 8a, a second connection line 8b, and a third connection line 8 which are output from the IFU 2
HA extension terminals 13 are connected to the ends of c and the fourth connection line 8d.

The HA extension terminal 13 is connected to the third photocoupler 1.
4 and a fourth photocoupler 15 are built in, the first connection line 8a and the second connection line 8b are connected to the anode and cathode of the light emitting diode of the third photocoupler 14, respectively, and the third connection line 8c And the fourth connection line 8d are connected to the collector and the emitter of the transistor of the fourth photocoupler 14, respectively. The collector and the emitter of the transistor of the third photocoupler 14 are connected to the first extension line 16a and the second extension line 1 respectively.
6b are connected to each other, and the anode and the cathode of the light emitting diode of the fourth photocoupler 15 are connected to the third extension line 16c and the fourth extension line 16d, respectively. A first extension line 16a, a second extension line 16b, a third extension line 16c,
The fourth extension line 16d is output from the HA extension terminal 13, and a header 17 is provided at the end. This header 1
7 is connected to the socket 12 of the device 1.

When the control signal is output from the IFU 2, a current flows through the light emitting diode of the first photocoupler 5, and the current of the power supply 7 turns on the transistor of the first photocoupler 5. A current flows through the first connection line 8a, and the light emitting diode of the third photocoupler 14 of the HA extension terminal 13 is turned on. When the light emitting diode of the third photocoupler 14 is turned on, the transistor of the third photocoupler 14 is turned on, and a control signal is transmitted to the device 1 via the first extension line 16a and the second extension line 16b.

When the monitor signal is output from the device 1, the monitor circuit 4 changes from the third extension line 16c to the fourth extension line 16c.
When a current flows through the light emitting diode d and the light emitting diode of the fourth photocoupler 15 of the HA extension terminal 13 is turned on, the transistor of the fourth photocoupler 15 is turned on, and a current flows through the light emitting diode of the second photocoupler 9. Flows. When the light emitting diode of the second photocoupler 9 is turned on, the transistor of the second photocoupler 9 is turned on, and a monitor signal is transmitted to the IFU 2.

[0018]

As described above, the HA interface according to the present invention provides a device such as a room air conditioner, a controller for controlling and monitoring the device via a home bus, and matching of interface conditions between the device and the home bus. In an HA interface of a home automation system including an interface unit for improving the performance, a photocoupler provided in a first circuit for directly connecting the device and the interface unit is connected to the device and the interface unit via an HA extension terminal. The first circuit and the second circuit are switched by the switching means by sharing the photocoupler provided in the second circuit for connection between the first circuit and the second circuit, so that the connection between the device and the interface unit can be directly performed with a small number of parts. Connection or connection using the HA extension terminal Those having an excellent effect that can be easily changed to either.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an HA interface according to the present invention, in which a device and an IFU are directly connected.

FIG. 2 is a circuit diagram showing an HA interface according to the present invention, in which a device and an IFU are connected using an HA extension terminal.

FIG. 3 shows a conventional HA interface, in which a device and I
It is a circuit diagram which connected FU directly.

FIG. 4 shows a conventional HA interface, in which a device and I
It is a circuit diagram which connected FU using the HA extension terminal.

[Explanation of symbols]

 Reference Signs List 1 device 2 IFU 3 control circuit 4 monitor circuit 5 first photocoupler 6a first switch 6b second switch 6c third switch 6d fourth switch 7 power supply 8a first connection line 8b second connection line 8c Third connection line 8d Fourth connection line 9 Second photocoupler 10 Power supply 11 Header 12 Socket 13 HA extension terminal 14 Third photocoupler 15 Fourth photocoupler 16a First extension line 16b Second Extension line 16c Third extension line 16d Fourth extension line 17 Header

Claims (1)

[Claims] 1. An apparatus such as a room air conditioner, a controller for controlling and monitoring the device via a home bus, and an interface unit for matching interface conditions between the device and the home bus. In an HA interface of a home automation system, a photocoupler provided in a first circuit for directly connecting the device and the interface unit, and a photocoupler for connecting the device and the interface unit via an HA extension terminal. And a photocoupler provided in the second circuit.
Characterized in that said circuit is switched by said switching means between said circuit and said second circuit.