JPS63120531A - Adaptor for power line carrier - Google Patents

Abstract

PURPOSE:To preclude the possibility of electric shock by providing a voltage generating circuit, a voltage/non-voltage switching circuit and an external interface circuit so as to use the voltage system and non-voltage system in common. CONSTITUTION:The voltage generating circuit 13, the voltage/non-voltage switching circuit 12 and the external interface circuit 14 are provided. The circuit 12 comprising a changeover switch is turned on/off manually by the worker. The circuit 13 applies a DC voltage to the external interface circuit 14. The external interface circuit 14 connects a non-voltage system control object device 16 and an adaptor 15 via a signal line 8a and the circuit connecting to the circuit 13 and the voltage system control object device 17 and the adaptor 15 are connected via a signal line 8b. Thus, one kind of the adaptor 15 is unified through the changeover of voltage/non-voltage changeover circuit with small in size and light in weight without possibility of electric shock at installation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power line carrier adapter used in a home automation system.

2. Description of the Related Art Conventionally, a power line carrying adapter 2-2 used in a home automation system as shown in FIG. 2 has a configuration as shown in FIGS. 3 to 5.

FIG. 2 shows an example of the configuration of a home automation system, in which 1 is a controller connected to a power line 2 which is a communication transmission path, 3 is a power line carrier adapter (hereinafter referred to as an adapter) connected to the power line 2, and 4 is a power line carrier adapter connected to the power line 2. is a device to be controlled, which is connected to the adapter 3 by signal lines 6, 6.

When the controller 1 is operated, a signal is sent to the adapter 3 via all the power lines 2, and the controlled device 4 operates according to the communication content. Further, a signal indicating this operation result is communicated from the adapter 3 to the controller 1 via the entire power line 2,
Controller 1 displays the contents. In this way, the device 4 to be controlled at a remote location can be controlled by the controller 1, and the results can be monitored.

By the way, in the current home automation system, a photocoupler is used as a means for transmitting communication from the controller 1. This is to provide electrical insulation in order to clarify the point of demarcation of responsibility in the event that the controlled device 3 malfunctions due to noise or the like. A photocoupler built into the device to be controlled is a voltage type (the adapter has a DC power source for the photocoupler), while a photocoupler is built into the entire adapter, which is a non-voltage type (the photocoupler is installed in the device to be controlled). There is a coupler DC power supply). These methods will be explained below.

FIG. 3 is an example of the voltage type. When the control signal from the controller 1 reaches the adapter 3, the first
The photocoupler 7a operates, the controlled device 4 performs an operation according to this control signal, and a signal representing the result is sent back to the adapter 3 from the second photocoupler 7b. 9 is a rectifier circuit, and 1o is a switching power supply circuit. The feature of this system is that the device 4 to be controlled has photocouplers 7a and 7bi, so even if there is noise on the signal line 8a connecting the adapter 3 and the device 4 to be controlled, the photocouplers 7a and 7b will Since the equipment 4 to be controlled is completely insulated, it is difficult to eliminate the influence of noise.
The advantage is that the length of the signal line 8+a can be increased to several tens of meters. Taking advantage of this feature, this method is adopted when the adapter 3 cannot be installed near the controlled device 4 for some reason. However, in this method, the cost of the photocoupler is added to the device 4 to be controlled, and a space for its insertion is also required.

FIG. 4 is an example of a no-voltage system. In this method, there is a photocoupler 7a in the adapter 3, and the operation is the same as the voltage type. The feature of this method is that the adapter 3 has photocouplers 7a and 7bi, so the device to be controlled 4
There is no need for the cost and insertion space of a photocoupler. However, if noise is introduced into the signal line 8b connecting the adapter 3 and the controlled device 4, there is a risk that the controlled device 4 will malfunction because there is an electrically isolated position within the adapter 3. Therefore, the length of the signal line 8b needs to be shortened to a maximum of several meters.

By the way, in the case of the voltage type shown in FIG. 3, since the power line 2 and the signal line 8a are not insulated and separated, there is a risk of electric shock if the connection terminal A portion of the signal line 8a is touched during construction.

Therefore, to prevent electric shock, step 5.

As shown in FIG. 5, a power transformer 11 was used to completely insulate the power line 2 and the signal line 8a.

Problems to be Solved by the Invention As described above, there are two types of adapters used in the past, one for voltage type and one for non-voltage type, and it was necessary to use one depending on the target equipment. In addition, voltage type systems use a power transformer to prevent the risk of electric shock, and are large and heavy.

An object of the present invention is to provide an adapter that solves these problems.

Means for Solving the Problems In order to achieve the above object, the power line carrier adapter of the present invention is configured to include a voltage generation circuit, a voltage/non-voltage switching circuit, and an external interface circuit. It is something.

Function: By having the above structure, it is small and lightweight, there is no risk of electric shock during construction, and by switching the voltage/non-voltage switching circuit, this type of adapter can be unified into Class 6 and X-A. be.

Embodiment FIG. 1 is a specific circuit diagram of an embodiment of the present invention. 12
1 is a voltage/non-voltage switching circuit consisting of a changeover switch, which is used by the installer or user to manually turn on/off the voltage of the voltage generating circuit 13. The voltage generation circuit 13 described above supplies a DC voltage to the external interface circuit 14. The external interface circuit 14 is a circuit that connects the non-voltage control target device 16 and the adapter 15 via the signal line 82L'i and the voltage generating circuit 13, and also connects the voltage control target device 17 and the adapter 15 with signals. line 8
This is a circuit connected via b.

The voltage generation circuit 13 includes a pulse transformer 13a that supplies DC voltage to the controlled device, and a rectifier diode 1.
3b, choke coil 13C1 smoothing capacitor 13d,
It is composed of a switching transistor 13e1 and a drive circuit 13f.

The external interface circuit 14 includes communication transmission and insulation separation means 14a, 14b (hereinafter referred to as a photocoupler) for connecting the controlled device to the voltage generating circuit 13 and the CPU 18i, current limiting resistors 14d, 14i,
14j, 14g, protection diode 14C914m, 1
4f, 14β, connection terminals 148, 14h, and reverse connection protection Zener diodes 14k, 14n.

The operation of the above configuration will be explained below. First, a case where the device to be controlled is of a no-voltage type will be explained. To prevent electric shock, it is necessary to insulate and separate the primary and secondary sides of power lines, and it is necessary to make the circuit small and lightweight. Therefore, instead of using the commercial frequency SO/6O11Z, we introduced a voltage generating circuit that uses a transformer that operates at a high frequency of several tens of K11Z. When set to the voltage/non-voltage switching circuit 12' (5122L side), a DC voltage is applied to the primary side of the pulse transformer 13&, and a switching pulse applied to the base of the switching transistor 1360 generates a high frequency of several tens of K11zO. As a result, a high frequency voltage according to the turns ratio is generated on the secondary side of the pulse transformer 132L, and this voltage is passed through the rectifier diode 13b.
, f Yoke coil 13C1 Smoothing capacitor 13d'''c
It is converted into an M current voltage and supplied to the external interface circuit 14. One side of this DC voltage is connected to the protection diode 14β
, current limiting resistor 141° photocoupler 14a, protection diode 14C1, current limiting resistor 14d, connection terminal 14
Pass the signal line 8ai through h, and connect the device 1 to be controlled by the voltageless system
It is supplied to photocoupler γa of No. 6. The other side is a protection diode 14m, a current limiting resistor 14, a photocoupler 14b, a protection diode 14f, and a current limiting resistor 14g.
, through the signal line 81L via the connection terminal 14h, and is supplied to the photocoupler 7b of the device 16 to be controlled by the voltageless method.

The above is an explanation of the DC voltage supply operation of the voltage generating circuit 13 and the external interface circuit 14.

Next, a case will be described in which all devices to be controlled are controlled. A signal from the controller enters the receiving circuit (not shown) of the adapter 15 via a power line, and reaches the photocoupler 14a of the external interface circuit 14 via the CPU 18 buffer (not shown). The photocoupler 141L operates, and a signal is transmitted to the device 16 to be controlled by the no-voltage method through the signal line 8a through the protection diode 14C1, the current-limiting resistor 14d, and the connection terminal 14h, and the photocoupler 7& operates, which causes the no-voltage method to be controlled. The controlled device 16 is controlled. Next, the monitor signal operates the photocoupler 7bi, and the protection diode 14m of the adapter 15 and the current limiting resistor 14j
, photocoupler 14b, protection diode 14f, current limiting resistor 14g, connection terminal 14hi, signal line 8ai
A direct current flows through the loop of the photocoupler 7b.

This operation causes the photocoupler 14b of the adapter 16 to operate, causing the CPU 18'ili? The monitor signal enters the transmission circuit (not shown) of the adapter 16 via the power line, and is transmitted to the controller via the power line, and the non-voltage controlled device 16
It is confirmed that it worked.

Next, a case where the controlled device is of a voltage type will be explained. Without switching, the voltage/non-voltage switching circuit 12 is set to the 12b side, and the voltage generating circuit 13i07F is set. Next, a DC voltage is supplied to the photocouplers 14a, 14b1o/, -7 of the adapter. In this method, the voltage controlled device 17 has a DC voltage supply source, and one side is connected to the signal line 8b'.
(i) Through the connection terminal 14e of the adapter 16.

Photocoupler 141L, ffl protection diode 14C1, current limiting resistor 14d, connection terminal 148i, signal line s
b'6 and returns to the voltage controlled equipment 17.

The other side is through the signal line sb'1, the connection terminal 14e of the adapter 15, the photocoupler 14b, and the protection diode 14f.
, the signal line sb1 is passed through the current limiting resistor 14g and the connection terminal 14e, and returns to the voltage controlled device 17.

Next, a case will be described in which all devices to be controlled are controlled. A signal from the controller enters the receiving circuit (not shown) of the adapter via the power line, and the photocoupler 14& of the external interface circuit 14 operates via the CPU 18, and the protection diode 14C1 current limiting resistor 14d and connection terminal 146'i are activated. The signal is transmitted to the voltage controlled device 17 through the signal line 8b, and the voltage controlled device 1
7 is under control. Next, the monitor signal is sent to adapter 15.
111, -7 photo coupler 14bi is operated, protection diode 14
A direct current flows in the loop of the voltage controlled device 17 through the signal line 8b, the current limiting resistor 14g, and the connection terminal 146. As a result of this operation, a monitor signal is transmitted to the transmission circuit (not shown) of the adapter 16 via the photocoupler 14bi of the adapter 16, the CPU (not shown), and is transmitted to the controller via the power line. It is confirmed that it worked. Note that 14 and 141 of the external interface circuit 14 are a reverse connection protection Zener diode and a reverse connection protection diode.

In this embodiment, a case has been described in which a photocoupler is used as a communication transmission and insulation/separation means, but even if a relay or the like is used, for example, the effects of this embodiment cannot be prevented.

Effects of the Invention As described above, the power line carrier adapter of the present invention is equipped with a voltage generation circuit, a voltage/non-voltage switching circuit, and an external interface circuit, so that it can be used even if it is a voltage system. Even if the voltage method is used, it can be shared, and there is a high risk of electric shock during construction.Furthermore, since it does not use a power transformer, it has been possible to create a small and lightweight power line transfer adapter.

[Brief explanation of the drawing]

Fig. 1 is a specific circuit diagram of a power line carrier adapter showing one embodiment of the present invention, Fig. 2 is a block diagram showing the configuration of a home automation system, Figs. 3, 4, and 5.
The figure is an explanatory diagram of a conventional power line carrying adapter. 12...Voltage/non-voltage switching circuit, IC1°°・
... Voltage generating circuit, 14... External interface circuit, 18... CPU. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 8a --Imiya No. a 86-- Zu1; No. Line I2- Voltage/non-image pressure VI horizontal circuit 13- Voltage all-star circuit 14- External interface 8 paths 15- Adapter 16- Thermovoltage control No. 17-Shoulder 9 pressure method Lie up and down) f&case 8-CPU

Claims (1)

[Claims] A voltage generation circuit having a pulse transformer, a rectifier diode, and a smoothing capacitor that supplies DC voltage to a device to be controlled, the device to be controlled, the voltage generation circuit, and a CPU.
Voltage/non-voltage switching consists of an external interface circuit that includes a communication transmission and insulation separation means, a current limiting resistor, and a protection diode, and a switch that switches the operation of the voltage generating circuit according to the specifications of the controlled device Power line carrier adapter with circuit.