Machine-closing linkage power-off circuit for industrial personal computer of test bench
By designing a power-off circuit for the industrial control computer of the test bench, and using the linkage control of relays and contactors, the power supply and power-off of the industrial control computer and other equipment can be linked, which solves the problem of cumbersome operation of traditional test benches and improves operation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-04-14
AI Technical Summary
In traditional test benches, the power-on and power-off operations of the industrial control computer and other equipment need to be performed separately, which makes the operation cumbersome.
Design a power-off circuit for the industrial control computer of a test bench. The circuit uses relays KA2 and KA1 and contactor KM1 to control the power supply of the industrial control computer and other equipment, and the power-on and power-off are achieved by button S1.
The shutdown procedure of the test bench has been simplified, and the power is automatically cut off after the industrial control unit is shut down, thus improving operating efficiency.
Smart Images
Figure CN224123278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of test bench technology, and in particular to a test bench industrial control shutdown linkage power-off circuit. Background Technology
[0002] A test bench is a device used in scientific experiments, industrial testing, and other research to measure, observe, or verify the characteristics of a product, process, or phenomenon. It is a small to medium-sized mechanical device operated by a person. Typically, it is operated by a person through an industrial control computer display interface. Commands are issued by built-in professional testing software, and a controller (such as a PLC relay system or I / O board) controls various actuators to perform predetermined operations on the tested object and reads the feedback from the tested object. Based on certain principles and laws, relevant parameters are calculated and deduced.
[0003] Traditional test benches have two power supply terminals. One terminal powers the industrial control computer, and the other powers other equipment on the test bench (such as a PLC). Powering on the industrial control computer and other equipment on the test bench are separate processes and must be operated separately. Powering off is also separate. Therefore, after completing the test on the test bench, you must first operate to shut down the industrial control computer on the computer screen. After the industrial control computer is completely shut down, you must then shut down the other equipment on the test bench, which makes the operation cumbersome. Utility Model Content
[0004] In order to overcome the defects of the existing technology, this utility model provides a power-off circuit for the industrial control system of the test bench to solve the above problems.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a test bench industrial control shutdown linkage power-off circuit, including a power line, relay KA2, relay KA1, contactor KM1 and button S1;
[0006] The coil of relay KA2 is electrically connected to the input / output terminals of the industrial control computer via the power supply line. The normally open contact of relay KA2 is connected in series with the coil of relay KA1 and then electrically connected between the positive and negative terminals of the switching power supply V1. The normally open contact of relay KA1 is connected in parallel with button S1 and in series with the coil of contactor KM1 and then electrically connected between the live wire and neutral wire of the mains power. The industrial control computer and other equipment on the test bench are all electrically connected to the mains power through the normally open contact of contactor KM1.
[0007] It is worth noting that the input / output terminals of the industrial control computer are USB interfaces, and the power cord is a USB power cord.
[0008] Preferably, the button S1 is a momentary switch.
[0009] Optionally, the positive terminal of the switching power supply V1 is electrically connected to one end of the coil of the relay KA1 through the normally open contact of the relay KA2, and the other end of the coil of the relay KA1 is electrically connected to the negative terminal of the switching power supply V1.
[0010] Specifically, one end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to the live wire, the other end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to one end of the coil of the contactor KM1, and the other end of the coil of the contactor KM1 is electrically connected to the neutral wire of the mains power.
[0011] It is worth noting that the switching power supply V1 is a 24V DC power supply.
[0012] The beneficial effects of this utility model are as follows: In the power-off linkage circuit of the industrial control unit of the test bench, the method of powering on the test bench is to press button S1, which instantly engages contactor KM1, transmitting electrical energy to the industrial control computer and other equipment on the test bench. The industrial control computer and other equipment on the test bench then start. After the industrial control computer starts, its input / output terminals are momentarily energized, causing relay KA2 to instantly engage, followed by relay KA1, keeping contactor KM1 engaged. Even if button S1 is released at this point, the test bench is successfully powered on. When the tester manually shuts down the industrial control unit, the input / output terminals of the industrial control computer lose power, followed by relay KA2, then relay KA1, causing contactor KM1 to lose power, resulting in the test bench losing power. This achieves the purpose of automatic power-off of the industrial control unit, thus simplifying the shutdown process. Attached Figure Description
[0013] Figure 1 This is a circuit diagram of the power-off linkage circuit for the industrial control unit of the test bench in one embodiment of this utility model;
[0014] Figure 2 This is a circuit diagram of a switching power supply in one embodiment of the present invention;
[0015] Figure 3 This is a circuit diagram showing the location of the contacts of contactor KM1 in one embodiment of the present invention.
[0016] Figure 4 This is the code for setting the industrial control computer to power-on self-starting mode in one embodiment of this utility model. Detailed Implementation
[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0018] like Figure 1-4 As shown, a power-off circuit for the industrial control system of a test bench includes a power cord, relays KA2 and KA1, a contactor KM1, and a button S1.
[0019] The coil of relay KA2 is electrically connected to the input / output terminals of the industrial control computer via the power supply line. The normally open contact of relay KA2 is connected in series with the coil of relay KA1 and then electrically connected between the positive and negative terminals of the switching power supply V1. The normally open contact of relay KA1 is connected in parallel with button S1 and in series with the coil of contactor KM1 and then electrically connected between the live wire and neutral wire of the mains power. The industrial control computer and other equipment on the test bench are all electrically connected to the mains power through the normally open contact of contactor KM1.
[0020] In the power-off linkage circuit of the industrial control unit of the test bench, the test bench is powered on by pressing button S1. Contactor KM1 instantly engages, transmitting power to the industrial control computer and other equipment on the test bench. The industrial control computer and other equipment then start. After the industrial control computer starts, its input / output terminals are momentarily energized, causing relay KA2 to momentarily engage, followed by relay KA1, keeping contactor KM1 engaged. Even if button S1 is released at this point, the test bench is successfully powered on. When the tester manually shuts down the industrial control unit, the input / output terminals of the industrial control computer lose power, followed by relay KA2, then relay KA1, causing contactor KM1 to lose power, thus automatically powering off the test bench and simplifying the shutdown process.
[0021] It is worth noting that the input / output terminals of the industrial control computer are USB interfaces, and the power cord is a USB power cord. The power cord is connected to the USB interface of the industrial control computer and supplies power to the coil of relay KA2 with a rated voltage of 5V. The contacts of relay KA2 energize the coil of relay KA1 with a rated voltage of 24V. The contacts of relay KA1 energize the coil of contactor KM1. The contacts of contactor KM1 energize the industrial control computer (excluding the test bench start circuit) and other equipment on the test bench (excluding the industrial control computer).
[0022] Specifically, the button S1 is a momentary switch. When pressed, the momentary switch connects the circuit it is in, and when released, it disconnects the circuit it is in.
[0023] It is worth noting that the positive terminal of the switching power supply V1 is electrically connected to one end of the coil of the relay KA1 through the normally open contact of the relay KA2, and the other end of the coil of the relay KA1 is electrically connected to the negative terminal of the switching power supply V1.
[0024] Specifically, one end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to the live wire, the other end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to one end of the coil of the contactor KM1, and the other end of the coil of the contactor KM1 is electrically connected to the neutral wire of the mains power.
[0025] Specifically, the switching power supply V1 is a 24V DC power supply.
[0026] like Figure 3 As shown, the unidirectional power supply (L3 and N lines in the figure) does not pass through the contacts of contactor KM1. Therefore, there is always power between L3 and N lines. L3 line is used as the live wire of the mains power in this scheme, and N line is used as the neutral wire of the mains power in this scheme.
[0027] like Figure 1 As shown, when button S1 is pressed and held for an instant (approximately tens of milliseconds), contactor KM1 is momentarily energized. Figure 3 The contactor KM1 contacts in the circuit then engage. Figure 2 When the switching power supply V1 in the test bench is powered on, the corresponding industrial control computer and all other equipment on the test bench (display screen, indicator system, signal system, controller, sensors, etc.) are all powered on and started. Because the industrial control computer is powered on, Figure 1 The input and output terminals are also instantly energized and output 5V voltage. Figure 1 The relay KA2 in the middle is also energized and energized, causing Figure 1 The relay KA1 in the middle is energized and engages. Subsequently... Figure 1 The relay KA1 and contactor KM1 form a lockout, so even if button S1 is released, the equipment will not lose power. Figure 3 Contactor KM1 in the test bench also remains engaged, and the industrial control computer and other equipment on the test bench are powered on and ready to work.
[0028] Power-off procedure after test completion: After clicking the power-off option on the industrial computer's display, the industrial computer will completely shut down. Figure 1 The input / output terminals shown are de-energized. Figure 1 The relay KA2 in the middle also lost power. Figure 1 Relay KA1 in the middle is de-energized. Figure 1 When contactor KM1 in the test bench loses power, the entire circuit is de-energized, thus achieving the purpose of automatically shutting down the industrial control system.
[0029] If the industrial computer is not set to automatically start upon power-on, the method described in this patent cannot be implemented. Please refer to [the relevant documentation]. Figure 4 The industrial control computer can be set to power-on auto-start mode using common program code in existing technology. After the industrial control computer is powered on, you can enter the BIOS interface to make the settings.
[0030] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.
Claims
1. A power-off circuit for the industrial control system of a test bench, characterized in that: Includes power cord, relay KA2, relay KA1, contactor KM1, and pushbutton S1; The coil of relay KA2 is electrically connected to the input / output terminals of the industrial control computer via the power supply line. The normally open contact of relay KA2 is connected in series with the coil of relay KA1 and then electrically connected between the positive and negative terminals of the switching power supply V1. The normally open contact of relay KA1 is connected in parallel with button S1 and in series with the coil of contactor KM1 and then electrically connected between the live wire and neutral wire of the mains power. The industrial control computer and other equipment on the test bench are all electrically connected to the mains power through the normally open contact of contactor KM1.
2. The test bench industrial control shutdown and power-off circuit according to claim 1, characterized in that: The industrial control computer has USB interfaces for input and output, and the power cord is a USB power cord.
3. The test bench industrial control shutdown and power-off circuit according to claim 1, characterized in that: The button S1 is a momentary switch.
4. The test bench industrial control shutdown and power-off circuit according to claim 1, characterized in that: The positive terminal of the switching power supply V1 is electrically connected to one end of the coil of the relay KA1 through the normally open contact of the relay KA2, and the other end of the coil of the relay KA1 is electrically connected to the negative terminal of the switching power supply V1.
5. The power-off circuit for the industrial control system of a test bench according to claim 1, characterized in that: One end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to the live wire. The other end of the normally open contact of the relay KA1 connected in parallel with the button S1 is electrically connected to one end of the coil of the contactor KM1. The other end of the coil of the contactor KM1 is electrically connected to the neutral wire of the mains power.
6. The test bench industrial control shutdown and power-off circuit according to claim 1, characterized in that: The switching power supply V1 is a 24V DC power supply.