Passive remote exit circuit

Abstract

The utility model discloses a passive remote exit circuit, comprising a main body assembly comprising an optocoupler U1, a TVS tube D5 connected to one signal port of the optocoupler U1, a TVS tube D4 connected to the other signal port of the optocoupler U1, and an MOS tube Q2, the MOS tube Q2 is connected with a resistor R64 and a resistor R65, and the main body assembly also comprises a resistor R63 and a resistor R57. The problems that an LED indicating lamp can only indicate a user and cannot directly control a signal, operation can be executed only when a person arrives at a site in actual use, generally, two working states can be switched through cooperation of a mechanical structure and micro motion or a key, the operation is not beneficial to remote signal control, and the service life of the LED indicating lamp is influenced are solved. The problems that an external node capable of being controlled needs to be provided for a user, the user can conveniently cut off a power supply of a control command in time, but a relay is generally adopted for providing a reliable dry node for the user, but the relay is large in size, high in cost and not suitable for small-size and low-power-consumption products are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a passive remote exit circuit. Background Art

[0002] In the field of ATS, there are two working states of products, one is automatic state and the other is manual state (non-automatic state). The product works normally in the automatic state, without manual intervention. The controller judges the power supply by collecting the upper port voltage and issues a conversion command when certain conditions are met, which is called automatic conversion; but when performing maintenance, setting parameters, and debugging, if you do not want the product to actually convert, you need to make the product work in a non-automatic state, that is, you can judge the voltage and issue commands, but the actuator will not convert. Generally, the ATS will be equipped with an LED indicator to indicate what working state the product is in.

[0003] However, it still has the following disadvantages in actual use:

[0004] The disadvantage of this method is that the LED indicator light can only give instructions to the user, and cannot directly control the signal. In actual use, people still need to be on site to perform the operation. Generally, the two working states can be switched through a mechanical structure with micro-switches or buttons. Such operation is not conducive to long-distance signal control. It is necessary to give the user a controllable external node to facilitate the user to cut off the power supply of the control command in time. However, in order to give the user a reliable dry node, relays are generally used, but relays are large in size and high in cost, and are not suitable for small-volume, low-power products. Utility Model Content

[0005] Technical solutions to be solved

[0006] The purpose of the utility model is to provide a passive remote exit circuit to solve the problem raised in the above background technology that the LED indicator light can only give instructions to the user but cannot directly control the signal. In actual use, people still need to be on site to perform the operation. Generally, the two working states can be switched by a mechanical structure with micro-switches or buttons. Such operation is not conducive to long-distance signal control. It is necessary to provide the user with a controllable external node to facilitate the user to cut off the power supply of the control command in time. However, in order to provide the user with a reliable dry node, a relay is generally used, but the relay is large in size and high in cost, and is not suitable for small-volume, low-power products.

[0007] Technical Solution

[0008] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0009] The utility model is a passive remote exit circuit, comprising:

[0010] The main component includes an optocoupler U1, a TVS tube D5 connected to one signal port of the optocoupler U1, and a TVS tube D4 and a MOS tube Q2 connected to another signal port of the optocoupler U1.

[0011] Furthermore, the MOS tube Q2 is connected to a resistor R64 and a resistor R65;

[0012] Specifically, the resistor R64 can adjust the driving current of the gate of the MOS tube, and the resistor R65 can limit the on-state voltage of the MOS tube VGS.

[0013] Further, the main body assembly also includes a resistor R63 and a resistor R57;

[0014] Among them, resistor R63 is used to adjust If, and resistor R57 is used for pull-down;

[0015] Specifically, If is adjusted by resistor R63, and resistor R57 is used for pulling down to ensure that the level at this point is a low level.

[0016] Furthermore, the main component also includes a resistor R5, a resistor R6 and a resistor R69, and the resistors R5, R6 and R69 are connected to a voltage of 12V or 24V to control different voltages;

[0017] Specifically, the power supply adopted by this solution is 24V.

[0018] Further, the resistor R5 is connected to a resistor R6, and the resistor R6 is connected to a resistor R7;

[0019] Specifically, the resistor R7 is not actually welded, but serves as a long jumper resistor.

[0020] Furthermore, the resistor R7 is a reserved long jumper resistor, and a resistor R68 is provided as a resistor having the same function;

[0021] Specifically, the resistor R68 is not actually soldered, and also serves as a long jumper resistor.

[0022] Furthermore, the resistor R57 also has a resistor R59 and a resistor R66.

[0023] Specifically, the resistor R59 and the resistor R66 are provided for pull-down to ensure that the level at this point is a low level.

[0024] Beneficial Effects

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] The utility model utilizes a remote exit circuit composed of a TVS tube, a resistor, an optocoupler, and a MOS tube, which can be adapted to small-volume, low-power applications and can replace traditional relay solutions. When debugging or maintenance is involved, when the power is cut off on the ATS port, the switching of the ATS can also be blocked, which is convenient for debugging.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is the circuit diagram of the first part of the utility model;

[0030] Figure 2 This is the circuit diagram of the second part of the utility model;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 11. Resistor R5; 12. Resistor R6; 13. Resistor R7; 14. Resistor R57; 15. Resistor R59; 16. Resistor R63; 17. Resistor R64; 18. Resistor R65; 19. Resistor R66; 20. Resistor R69; 21. TVS tube D4; 22. TVS tube D5; 23. Optocoupler U1; 24. MOS tube Q2; 25. Resistor R68. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] Example

[0037] See also Figure 1 and Figure 2 As shown, this embodiment is a passive remote exit circuit, including: a main component, including an optical coupler U1 23, a TVS tube D522 connected to a signal port of the optical coupler U1 23, a TVS tube D4 21 and a MOS tube Q2 24 connected to another signal port of the optical coupler U1 23;

[0038] The MOS tube Q2 24 is connected to a resistor R64 17 and a resistor R65 18;

[0039] The main assembly also includes a resistor R63 16 and a resistor R57 14;

[0040] Among them, the resistor R63 16 is used to adjust If, and the resistor R57 14 is used for pull-down;

[0041] The main component also includes a resistor R5 11, a resistor R6 12 and a resistor R69 20, and the resistor R5 11, the resistor R6 12 and the resistor R69 20 are connected to a voltage of 12V or 24V to control different voltages;

[0042] The resistor R5 11 is connected to the resistor R6 12, and the resistor R6 12 is connected to the resistor R7 13;

[0043] The resistor R7 13 is a reserved long jumper resistor, and the resistor R68 25 is provided with the same function;

[0044] Resistor R57 14 also functions as resistor R59 15 and resistor R66 19;

[0045] To understand how to use a passive remote exit circuit, the following steps are published:

[0046] The primary power supply of the optocoupler U1 23 is 12V+_ISO, which is an isolated power supply. The resistor R63 16 is used to adjust If, and the resistor R57 14 is used to pull down to ensure that the level at this point is low. The TVS tube D5 22 is used to protect the static electricity and surge protection of the signal port. The maximum limiting voltage of the tube is ≤ the voltage after isolation. The function of the TVS tube D4 21 is the same as that of the TVS tube D5 22. The secondary side of the optocoupler uses PMOS. Out_power can be connected to different voltages through different jumper resistors, such as resistor R511, resistor R6 12, and resistor R69 20. It can be connected to 12V or 24V voltage and can control different voltages. The power supply connected here is 24V. Resistor R7 13 is a reserved long jumper resistor, which is not actually welded. The function of resistor R68 25 is the same as that of resistor R7 13, resistor R59 15, and resistor R6619 is the same as that of resistor R57 14. Resistor R64 17 can adjust the driving current of the gate of MOS tube Q2 24, and resistor R65 18 can limit the on-state voltage of MOS tube VGS. quit_in and quit_out are two terminals of passive signals connected externally by the user. When quit_in and quit_out are short-circuited, the primary side 1 and 2 pins of the optocoupler are not conducting, and the PMOS tube is not conducting, so there is no output voltage at the AM_IN point. The AM_IN point is connected to the power supply pin of the subsequent control device. Therefore, when the two signals are short-circuited, the power supply voltage of the control device is 0 and it cannot work normally, that is, the power supply can be cut off, and the controller works in the exit state. The two short-circuited signals can be controlled remotely by users through cables. The normal distance of the shielded secondary line can be up to 10m, and the unshielded line is 5m. When quit_in and quit_out are not short-circuited, the primary side of the optocoupler is turned on, the MOS tube Q2 24 is turned on, and the voltage drop is about 0.7V. Therefore, the voltage at the AM_IN point is 12-0.7=11.3V, and the power supply of the control device is normal and works in the automatic state.

[0047] When the signal does not need to be isolated and the optocoupler is used for differentiation, the optocoupler and the primary feedback circuit can be deleted. At this time, the resistor R7 13 and the resistor R68 25 are welded together to directly control the power supply.

[0048] This step can be adapted to small-volume, low-power applications and can replace traditional relay solutions.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A passive remote exit circuit, characterized in that: include: The main component includes an optical coupler U1 (23), a TVS tube D5 (22) connected to a signal port of the optical coupler U1 (23), a TVS tube D4 (21) connected to another signal port of the optical coupler U1 (23), and a MOS tube Q2 (24); The MOS tube Q2 (24) is connected to a resistor R64 (17) and a resistor R65 (18); The main assembly also includes a resistor R63 (16) and a resistor R57 (14); Among them, resistor R63 (16) is used to adjust If, and resistor R57 (14) is used for pull-down.

2. A passive remote exit circuit according to claim 1, characterized in that: The main component also includes a resistor R5 (11), a resistor R6 (12) and a resistor R69 (20). The resistor R5 (11), the resistor R6 (12) and the resistor R69 (20) are connected to a voltage of 12V or 24V to control different voltages.

3. A passive remote exit circuit according to claim 2, characterized in that: The resistor R5 (11) is connected to a resistor R6 (12), and the resistor R6 (12) is connected to a resistor R7 (13).

4. A passive remote exit circuit according to claim 3, characterized in that: The resistor R7 (13) is a reserved long jumper resistor, and a resistor R68 (25) having the same function is provided.

5. A passive remote exit circuit according to claim 1, characterized in that: Resistors having the same function as the resistor R57 (14) include a resistor R59 (15) and a resistor R66 (19).

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