JPH0284091A - Built-in controlling circuit for combining motor, solenoid and the like, and connection thereof - Google Patents

Abstract

PURPOSE:To enable either a power source line or a control signal line to be operated by enabling the lines of a power source and control signal to be turned ON/OFF from an external section, and by contriving the power source to be fed to a motor and a solenoid when both the lines are ON. CONSTITUTION:To the terminals B1, B2 of a solenoid controlling circuit 10, a DC24V power source is fed, and to terminals C1, C2, control signal is fed. By the control signal, via the control signal interface 20 of a photo-coupler, the transistor 33 of a load controlling circuit 30 is turned ON/OFF, and feed to a solenoid 50 is turned ON/OFF. The power source is set to be always ON and could be controlled by the ON/OFF of the control signal, and the control signal is set to be always ON and could be controlled by the ON/OFF of the power source.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control circuit for a motor or a solenoid that is controlled in a distributed manner. The present invention relates to a control circuit for incorporating a motor, a solenoid, etc., and a method for connecting the same, which can be controlled only by the presence or absence of electricity.

[Conventional technology]

In conventional control circuits for motors, solenoids, etc., the control section and the load itself such as the motor or solenoid were separated, and the control section was placed near the control signal generating section, such as a microcomputer. , the load itself was installed so as to be integrated with the drive mechanism. Recently, as a form of distributed control, a method has been adopted in which the control section is placed near the load to separate it from the source of the control signal, and even more advanced methods have been adopted in which the control section is incorporated into the load. It is becoming.

Compared to the former separation method in which the control unit is placed near the control signal generation source, these methods do not require running power wiring for the load to the control unit, reducing power loss and reducing power consumption. The control signal wiring can be thinner than the control signal wiring, which is advantageous in terms of cost and space. Furthermore, when wiring power lines such as AClooV, there are uniforms for safety reasons, so it is necessary to perform wiring that satisfies safety, whereas wiring for control signals has fewer restrictions and is safer. It also has the advantage of satisfying the above requirements and being low cost. Because of these many advantages, it has become common to separate the control section from the control signal generation source and place it near the load or incorporate it into the load.

[Problem to be solved by the invention]

However, there is of course no problem with a control circuit in which the aforementioned control section is separated from the control signal source and placed near the load or built into the load, as long as the operating conditions are met, but conventional When used in another method, such as when used as a component or unit of an old method of controlling the load by turning on and off its own power,
The drawback is that it will not work unless a terminal is added, some of the connector connections are changed, and a new control signal is input. One way to avoid this drawback is to change the polarity of the signals so that when the load has two inputs, a power supply and a control signal, the load operates when the control signal is not input, that is, when it is not connected and is not connected. There is a way to set it. However, this method is not normally adopted from the viewpoint of safety because the load will operate even if the control signal input is accidentally disconnected during normal use.

Therefore, since they cannot be shared, it is necessary to prepare two types of loads for maintenance purposes: a load controlled by turning on and off the conventional power supply, and a load controlled by a control signal.

Therefore, an object of the present invention is to
To provide a control circuit for incorporating a motor, a solenoid, etc., and a method for connecting the same, in which a control operation of a load can be easily performed by simply changing the connection in either the OFF or OFF mode.

[Means to solve the problem]

The built-in control circuit for a motor, solenoid, etc. according to the present invention includes a control signal interface that converts the level of a control signal input for controlling the on/off state of a load and transmits it to an internal circuit, and a control signal interface that converts the level of a control signal input and transmits it to an internal circuit. In a built-in control circuit for a motor, solenoid, etc., which is equipped with a load control circuit that drives and controls a load in response to a signal from the control signal interface, when at least one of the two input connection terminals of the control signal interface is open. A control signal generator that sets the polarity of the input connection terminal to a high level side and a low level side so that the load control circuit does not operate, and further generates a control signal responsive to the on/off state of the power supply supplied to the load. It is characterized by the provision of a circuit.

In order to operate the built-in control circuit for the motor, solenoid, etc. by an external control signal, connect one of the high-level side connection terminals of the two input connection terminals of the control signal interface to the load power supply. The other low-level side connection terminal may be connected to an external control signal line, and the output connection terminal of the internal control signal generation circuit may be left open.

In addition, to operate by turning the load power supply on and off,
One high level side connection terminal of the two input connection terminals of the control signal interface may be connected to the output connection terminal of the control signal generation circuit, and the other low level 0!11 connection terminal may be connected to the ground terminal.

[Effect]

According to the built-in control circuit for motors, solenoids, etc. according to the present invention, the polarity of the two input connection terminals of the control signal interface is set to the high level side and the low level α side, and By providing an internal control signal generation circuit, you can not only control the load using external control signals, but also control the load by simply changing the connection method of the connection terminals of the control circuit, and by turning the load power supply on and off. Load can be controlled. If you simply do not connect the control signal line to the input connection terminal of the control signal interface, the load will not turn on even if the load power is turned on, and the control signal generation circuit will not connect to the input connection terminal of the control signal interface. Starting by inputting a control signal from
The load can be turned on. In this case, in order to turn the load off, it is sufficient to turn off the power to the load.

〔Example〕

Next, embodiments of a control circuit for incorporating a motor, a solenoid, etc. and a method of connecting the same according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a circuit configuration diagram of a control circuit for incorporating a motor and a solenoid, showing one embodiment of the present invention. In FIG. 1, a reference numeral 10 indicates a control circuit for incorporating a motor, a solenoid, etc., and the control circuit IO for incorporating such as a motor or solenoid receives a control signal via a control signal interface 20, and receives a control signal from a load control circuit 30. It performs on/off control of the load, or performs thixobar control to vary the generated power. Note that the control signal interface 20 performs level conversion of the control signal, and
It also separates the potentials of the power system and signal system.

The built-in control circuit 10 for the motor, solenoid, etc. has connection terminals AI, A2. The connection terminal B1 is a positive power line connection terminal, and the internal circuit connected to the connection terminal B1 is a power source for the control signal generation circuit 40 and the control signal interface 20. This is side wiring. In this embodiment, the connection terminal B1 has a resistor 4
1 and the collector of the light-receiving transistor 23 inside the photocoupler, and further internally connected to the connection terminal A1.

The connection terminal RI is an output terminal of the control signal generation circuit 40, and is connected to the other end of the resistor 41 here.

Connection terminals CI and C2 are input terminals of the control signal interface 20, and in this embodiment, connect a series circuit of a resistor 21 and a light emitting diode 22 in a photocoupler. The resistor 21 of this series circuit is connected to the connection terminal CI to set it as a high level side terminal, and the connection terminal C2 is connected to the cathode of the light emitting diode 22 in the photocoupler and set as a low level side terminal.

The connection terminal A2 is an output terminal of the load control circuit 30. Here, the load control circuit 30 is composed of a resistor 31, 32 and an output transistor 33.
The collector terminal No. 3 serves as an output terminal. One end of the resistor 31 is connected to the base of the output transistor 33 and the resistor 32, and the other end is connected to the light receiving transistor 23 in the photocoupler.
connected to the emitter of

The connection terminal B2 is a ground terminal, and here the resistor 32 in the load control circuit 30 and the emitter of the output transistor 33 are connected.

Built-in control circuit 10 for motors, solenoids, etc. configured in this manner (hereinafter referred to as built-in control circuit)
In the embodiment shown in FIG. 1, a solenoid 50 and a freewheel diode 51 are connected as loads between the connection terminals AI and A2, and 24 V DC is connected between the connection terminals Bl and 82.
(7) The load power supply is connected.

Next, a method of connecting the terminals of this built-in control circuit 10 and its operation when controlling a load using an external control signal will be described with reference to FIGS. 1 and 2.

As shown in FIG. 2, the external control signal generation source is a microcomputer (hereinafter referred to as CPU) 60 in this case, and the output terminal OUT of the CPU 60 and the built-in control circuit 10 are connected to each other.
It is connected to the low level side input terminal C2 of the inverter 61 via the inverter 61. A signal system power supply Vcc, which is independent from the power system load power supply 70, is connected to the high level side input terminal C1. The DC of the load power supply 70 is connected between the contact VT terminals Bl and 82.
Connect the 24V wiring. The connection terminal, which is the output terminal of the control signal generation circuit 40 inside the built-in control circuit 10, is left open. A solenoid 50 and a freewheel diode 51, which are loads, are connected in parallel between connection terminals AI and A2.

After the connection is made in this way, when a high level signal (hereinafter, high level is referred to as H and low level is referred to as L) is output from the OUT terminal of the CPU 60, it is inverted by the inverter 61 and sent to the built-in control circuit 10 as an L signal. It is input to the low level side input terminal C2 of. Therefore, as is clear from FIG. 1, the voltage at terminal C2 becomes low, so that the power supply Vcc
A current is supplied from the input terminal CI to the light emitting diode 22 in the control signal interface 20 via the high level side input terminal CI and the resistor 21, so that the light emitting diode 22 emits light.

This light emission turns the light-receiving transistor 23 on, and the load power supply 70 connects the terminal Bl to the light-receiving transistor 23.
A current is supplied to the base of the output transistor 33 of the load control circuit 30 through the collector-emitter and the resistor 31, and the output transistor 33 is turned on. As a result, the connection terminal A2 is electrically connected to the ground terminal B2, so that the load power source 70 is applied to both ends of the load solenoid 50, and the solenoid 50 is turned on. When the OUT terminal of the CPU 60 becomes an L signal, an H signal is input to the low level side input terminal C2 of the built-in control circuit 10.
The potential of the connection terminal C2 rises to near the power supply Vce, and almost no current is supplied to the light emitting diode 22 in the control signal interface 20, so that light emission stops. Therefore,
The light receiving transistor 23 is turned off, the base current supply to the output T transistor 33 is stopped, and the output transistor 33 is also turned off. There is no conduction between the connection terminals A2 and 82, and the solenoid 50 is turned off. At this time, the energy stored in the solenoid 50 of the load causes the load current to circulate through the freewheel diode 51. In this way, it can be seen that the load solenoid 50 can be controlled on and off by the control signal from the CPU 60. Note that if at least one of the input connection terminals C1 or C2 is disconnected and becomes open, no current flows to the light emitting diode 22 in the control signal ink face 20, so it does not emit light, and therefore the load Even if the power source 70 is applied between the terminals Bl and B2, the solenoid 50 is not turned on.

Next, a method of connecting the terminals of the built-in control circuit 10 and its operation when controlling a load by turning on and off the load power supply 70 will be described with reference to FIGS. 1 and 3.

As shown in FIG. 3, the output terminal OUT of the CPU 60 and the coil X side of the electromagnetic relay 80 are connected via the inverter 6e. The positive side of the load power supply 70 and the connection terminal B1 of the built-in control circuit 10 are connected to the normally open contact X of the electromagnetic relay 80.
Connect via. The output terminal of the control signal generation circuit 40 is connected to the high level input terminal C1, and the low level input terminal C2 and the connection terminal B2 are connected and grounded.
The negative side of the load power source 70 is also grounded. Connection terminal AI
, A2, a solenoid 50 and a freewheel diode 51 are connected in parallel.

It will be explained below that by connecting in this way, the on/off state of the load can be controlled by the on/off operation of the load power supply.

First, when an H signal is output from the OUT terminal of the CPU 60, it is inverted by the inverter 61 to become an L signal, and this L signal is input to the electromagnetic relay 80. As a result, an exciting current flows through the coil X and the contact X is closed, and +24V from the load power source 70 is applied to the connection terminal B1 of the built-in control circuit 10. Since the connection terminal B1 and CI are connected, and the connection terminals C2 and 82 are connected and grounded, as is clear from FIG. 1, when a voltage is applied to the connection terminal B1, the resistance 41. A current is supplied to the light emitting diode 22 via the resistor 21, and the light emitting diode 22 emits light. Therefore,
The light receiving transistor 23 is turned on, and the output transistor 33 is turned on to drive the base of the output transistor 330.
is also turned on. As a result, the connection terminal A2 becomes electrically connected to the connection terminal B2, and the voltage of the load power supply 70 is applied to both ends of the solenoid 50, so that the solenoid 50 is turned on.

Next, when the OUT terminal of the CPU 60 becomes an L signal, an H signal is input to the electromagnetic relay 80.

As a result, the excitation current to the coil X of the electromagnetic relay 80 disappears, the contact X becomes open, and no voltage is applied to the connection terminal B1.Therefore, no voltage is applied to the solenoid 50, and the solenoid 50 becomes off.

As explained above, by using the same built-in control circuit 10 and simply changing the terminal connection method, the load can be controlled by an external control signal or by the on/off operation of the load power supply. On/off control is possible.

〔Effect of the invention〕

As is clear from the embodiments described above, according to the present invention,
For the two input connection terminals of the control signal interface,
By setting the polarity of the high level side and the low level example and providing an internal control signal generation circuit, even if the same motor or solenoid is used as a built-in control circuit,
Simply change the terminal connection method without changing part of the connector wiring or adding a new external signal input line.
The on/off state of the load can be controlled either by an external control signal or only by whether or not the load power source is energized.

Therefore, according to the present invention, it is possible to easily improve the function so that the load, which was conventionally controlled by whether or not the load is energized, can be controlled on and off by the control signal from the CPU. It can be used even with the control method of
Two types of loads: one with built-in control circuit and one without built-in control circuit.
There is no need to prepare FFs for maintenance, and if you prepare only one type of load that incorporates the new control circuit of the present invention, it can be shared with conventional loads, making it easier to manage maintenance parts and save money. It is also beneficial in terms of education.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a control circuit for incorporating a motor or a solenoid, etc. according to the present invention, and FIG. A circuit diagram showing a connection method when a load is controlled by a signal. FIG. 3 is a circuit diagram showing a connection method when a load is controlled depending on whether or not the load power supply is energized using the control circuit of the embodiment of the present invention shown in FIG. FIG. 3 is a circuit diagram illustrating the method. 10. Control circuit for incorporation into motors, solenoids, etc. 20. Control signal interface 21. Resistor 22. ,, light emitting diode 23, , light receiving transistor 3o11, load control circuit 31.32. ,,Resistance 33. ,,output transistor 40,,,control signal generation circuit 41. ,,resistance 50
, , Solenoid 51 , , Freewheel diode 60 , , CPU 61. ,,inverter 70,. Load power supply 80,. electromagnetic relay

Claims (3)

[Claims] (1) A control signal interface that converts the level of a control signal input to control the on/off state of the load and transmits it to an internal circuit, and drives and controls the load in response to the signal transmitted from the control signal interface. In a built-in control circuit for a motor, solenoid, or the like, which includes a load control circuit, the input connection is configured such that the load control circuit does not operate when at least one of the two input connection terminals of the control signal interface is in an open state. A motor or solenoid characterized in that the polarity of the terminal is set to a high level side and a low level side, and is further provided with a control signal generation circuit that generates a control signal in response to the on/off state of the power supply supplied to the load. Embedded control circuits such as (2) Connect one high-level side connection terminal of the two input connection terminals of the control signal interface to the control signal power supply line independent of the load power supply, and connect the other low-level side connection terminal to the external control A motor, a solenoid, etc. configured to operate the circuit according to claim 1 based on an external control signal by connecting to a signal line and leaving the output connection terminal of an internal control signal generation circuit in an open state. How to connect an embedded control circuit. (3) By connecting one high-level side connection terminal of the two input connection terminals of the control signal interface to the output connection terminal of the control signal generation circuit, and connecting the other low-level side connection terminal to the ground terminal. A method for connecting a built-in control circuit such as a motor or a solenoid configured to operate the circuit according to claim 1 based on the on/off operation of a load power source.