JPH0470641B2 - - Google Patents

Description

Detailed Description of the Invention (Object of the Invention) The present invention relates to an electronic control device equipped with a control circuit such as a power supply unit, a CPU (central processing unit), an input/output unit, a program setting device, etc. By configuring the circuit with a small-capacity circuit, it is possible to control low-voltage and current devices such as proximity switches, photoelectric switches, and small-capacity solenoid valves at low cost. By connecting an input/output unit equipped with electrical parts and circuits necessary to drive small-capacity controlled devices to the electronic control device body, it is possible to easily control high-voltage current devices such as large-capacity solenoid valves. This relates to improvements in electronic control equipment that have made it possible to

(Industrial field of application and conventional technology) In electronic control equipment such as sequence controllers that have already been provided, one case includes a power supply unit, a CPU, and the required number of input points within the control capacity of the CPU. A specific number of input/output units with output interface circuits can be incorporated and used. Such conventional electronic control equipment can be provided relatively inexpensively even in the case of small-scale control equipment because the number of input/output units that can be incorporated into it can be increased or decreased according to the number of control points of the controlled equipment. When connecting a control device and its input/output unit, the connection means for connecting and extending both devices is not equipped with any special means to reduce the effects of external noise, etc. Do not place it too far away from the output unit (i.e.
It was not possible to lengthen the connecting wire.

(Problems to be Solved by the Invention) Therefore, there is a drawback that the placement location is restricted, and each input/output unit and other units have a terminal row display section only on the front of the case in which they are incorporated. Because the case is provided with necessary parts for use, there are restrictions on the mounting position of the case within the control box, and the control box naturally has to be large.

(Means for Solving the Problems) In order to improve the drawbacks of such conventional electronic control equipment, the present invention provides an input section for obtaining input information from a controlled device, and an input section for receiving input information from the input section. It is equipped with a central processing section that performs predetermined processing based on the central processing section, and an output section that energizes and deenergizes the controlled equipment based on the results processed by the central processing section, and the input section and the output section are equipped with an insulating element. an electronic control device that is configured with a small-capacity circuit containing a large amount of power, and has a connector for connection to a controlled device; It is characterized by comprising a large-capacity control circuit that drives a large-capacity controlled device that cannot be controlled by the small-capacity circuit of the control device, and an input/output unit that incorporates a terminal section for connecting to the large-capacity controlled device. In this way, to control only low voltage and current equipment, it is sufficient to connect the low and low voltage current equipment to the connector for connection, and to control high voltage and current equipment, it is possible to control high voltage and current equipment by connecting a large capacity control circuit, etc. to the connector for connection. This is possible by connecting via a built-in input/output unit, and therefore, it is possible to create an excellent electronic control device that is easy to handle and does not impose restrictions on the installation location of the electronic control device.

(Embodiment) In the embodiment shown in FIG. 1 of the attached drawings, the electronic control equipment includes a power supply unit and a power supply unit in one case 1.
It incorporates necessary electrical parts such as a CPU, display unit, and program setting device, and its input/output section has a small capacity of, for example, 24 input points and 20 output points, such as AC or DC 24 [V], 40 [mA]. The following input/output points are incorporated, and the input/output section includes a second
As shown in Figures 1 to 3-2, the insulation element 2,
2, . . . , and a connector 3 for connecting a controlled device via the insulating element 2 is provided in a case 1 constituting the main body of the electronic control device.

With this configuration, controlled devices such as proximity switches, photoelectric switches, and small-capacity solenoid valves that operate with weak voltage and current can be directly connected to the connector 3, so that the sequence control system itself can be constructed at low cost.

In addition, the cord connecting the connector 3 to the controlled device is also a small capacity circuit incorporating an insulating element.
Since the noise resistance is improved and the length is not restricted, the electronic control device 1 has the feature that there are no restrictions on the mounting position within the control box in which it is installed.

Next, for controlling controlled devices such as solenoid valves that operate with strong voltage and current, for example, large-capacity control such as relays, amplifiers, and silicon-controlled rectifiers SSR shown in Figures 4-1 to 4-3 is required. Either the input/output unit 5 incorporating each necessary electrical component circuit or the required number of large-capacity control components is directly connected to the connection connector 3 of the electronic control equipment main body 1 through its connector 4; Or connect it via a cable of the desired length and connect it to the input/output unit 5.
By connecting an input device or a controlled device to the terminal section 7, controlled devices including large-capacity controlled devices can be controlled in the same way as conventional electronic control devices. Note that the part indicated by numeral 6 indicates the load.

(Effects of the Invention) As described above, the electronic control device of the present invention has its input/output section composed of a small capacity circuit incorporating an insulating element, and is provided with the connector 3 for connection to the controlled device. To control only voltage and current controlled equipment, it is sufficient to connect the small capacity controlled equipment to the connector 3, so the sequence control system itself using electronic control equipment can be supplied at a low cost, and the electronic control equipment To control a large-capacity controlled device that cannot be controlled by the control device alone, it is possible to connect the input/output unit 5, which incorporates necessary electrical components as necessary, to the connector 3 so as to interpose it in the large-capacity controlled device. Since it has become possible to control large-capacity controlled equipment, it has been possible to provide an electronic control equipment that is easy to handle, has no restrictions on its installation location, and is inexpensive and superior.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the input/output unit for connecting a large-capacity controlled device of the electronic control device of the present invention in isolation; FIGS. 2-1 and 2-2 are AC and DC circuit diagrams of the input section of the present invention; Figures 3-1 and 3-2 are the same AC and DC circuit diagrams of the output section, and Figures 4-1, 4-2, and 4-3.
The figures are circuit diagrams showing parts of three examples of large-capacity input/output units. 1 is a case (electronic control equipment main body), 2 is an insulating element, 3 and 4 are connectors, 5 is an input/output unit, 7
is the terminal section.

Claims (1)

[Claims] 1 an input unit that obtains input information from a controlled device;
a central processing unit that performs predetermined processing based on input information from the input unit; and energizing a controlled device based on the results processed by the central processing unit;
an electronic control device main body, comprising an output section that is deenergized, the input section and the output section being constructed of a small-capacity circuit incorporating an insulating element, and a connector for connection to a controlled device; a large-capacity control circuit for driving a large-capacity controlled device that cannot be controlled by a small-capacity circuit of the main body of the electronic control device; An electronic control device comprising: an input/output unit incorporating a terminal section for connection to the input/output unit.