A communication loading and unloading and anti-wrong connection circuit for dual power supply controller

Abstract

The present invention relates to a communication loading and unloading and misconnection prevention circuit for a dual power supply controller, which is used to realize the disconnection of the communication function in the dual power supply controller system and prevent the misconnection of the wiring terminals. The circuit comprises a wiring terminal, an indicator light module and a communication function module. An external power supply is connected to the indicator light module and the communication function module respectively through the wiring terminal. The indicator light module comprises an optical coupler and a light-emitting diode. The cathode of the light-emitting diode is grounded, and the anode of the light-emitting diode, a first resistor, a second resistor and a light-emitting power supply are connected in sequence. The first end of the switch part of the optical coupler is connected between the first resistor and the second resistor, and the second end is grounded. The external power supply, the wiring terminal, the third resistor, the light-emitting part of the optical coupler and the fourth resistor are connected to the ground in sequence. Compared with the prior art, the present invention has the advantages of low power consumption, safe and reliable use, etc.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a communication assembly and disassembly and misconnection prevention circuit for a dual power supply controller. Background Art

[0002] The dual power supply controller is used to realize the automatic switching between the normal power supply and the backup power supply. It is mainly used in some important occasions where power interruption is required. The continuity of power supply is extremely important for some special user departments, such as hospitals, airports, etc., to ensure the normal operation of equipment under normal power supply conditions. It has been widely used in high-rise buildings, post and telecommunications, coal mines, military facilities, large industries, power grids, fire protection, hospitals, subways and other occasions where power outages are not allowed.

[0003] Most dual power controllers now have communication functions, but this communication function cannot be used in every situation. This results in the communication chip still being in working state when the communication function is not used, resulting in a waste of system power consumption. In addition, on-site wiring personnel may be negligent after all. Once they connect the wiring terminals in the wrong order without paying attention, data cannot be collected at the least, and the controller is likely to be damaged after being powered on for a long time, causing serious consequences. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a communication loading and unloading and anti-wrong connection circuit for a dual power supply controller.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A communication loading and unloading and anti-wrong connection circuit for a dual power supply controller is used to realize the disconnection of the communication function in the dual power supply controller system and prevent the wiring terminals from being wrongly connected. The circuit includes wiring terminals, an indicator light module and a communication function module. An external power supply is connected to the indicator light module and the communication function module through the wiring terminals respectively. The indicator light module includes an optical coupler and a light-emitting diode. The cathode of the light-emitting diode is grounded, and the anode of the light-emitting diode, a first resistor, a second resistor and a light-emitting power supply are connected in sequence. The first end of the switch part of the optical coupler is connected between the first resistor and the second resistor, and the second end is grounded. The external power supply, wiring terminals, a third resistor, the light-emitting part of the optical coupler and a fourth resistor are connected to the ground in sequence.

[0007] The communication function module comprises a communication chip connected to the main control chip, and the Vcc pin of the communication chip is connected to the wiring terminal.

[0008] The model of the communication chip is SN65HVD1782.

[0009] A first capacitor is also provided between the first end and the first end of the optical coupling switch part.

[0010] The Vcc pin of the communication chip is also grounded through a second capacitor.

[0011] The B pin of the communication chip is connected to the TXD1-B port of the main control chip, the A pin is connected to the RXD1-A port of the main control chip, and the D pin is connected to the TXD1 port of the main control chip. After being connected to each other, the DE pin is connected to the RE / DE port of the main control chip, and the R pin is connected to the RXD1 port of the main control chip.

[0012] When the communication function of the dual power supply controller needs to be used and the wiring of the terminal is correct, the communication chip is energized with the external power supply to realize the communication function, and the optocoupler light-emitting part is turned on, so that the light-emitting diode goes out to indicate normal communication; when the communication function of the dual power supply controller is not needed or the wiring of the terminal is incorrect, the communication chip is powered off and the optocoupler loses power, so that the light-emitting diode lights up to indicate abnormal communication and wiring errors.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1) Low power consumption: When the communication function is not used, the wiring terminals are not connected, the communication chip has no power supply, and no communication is performed, which reduces the overall power consumption of the circuit when there is no communication.

[0015] 2) Safe and reliable use: While reducing the power consumption of the overall circuit when there is no communication, it also avoids the situation where the wiring operator makes a wiring error that causes damage to the equipment. Once the wiring operator connects the power cord incorrectly, the light-emitting diode and the alarm indication issued by the communication chip can quickly cut off the power for inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the circuit diagram of the indicator light module;

[0017] Figure 2 It is the circuit diagram of the communication function module;

[0018] Figure 3 This is the wiring terminal circuit diagram. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example

[0021] The invention provides a communication assembly and disassembly and misconnection prevention circuit for a dual power supply controller, which is used for assembly and disassembly of the communication function of the dual power supply controller and for preventing wiring errors. The circuit comprises a wiring terminal JP5, an indicator light module and a communication function module.

[0022] Figure 1 The circuit diagram of the indicator light module is as follows: the indicator light module includes an optocoupler U14 and a light emitting diode D5, the cathode of the light emitting diode D5 is grounded, and the anode of the light emitting diode D5, the first resistor R84, the second resistor R80 and the light emitting power source VCC2 are connected in sequence; the first end of the switch portion of the optocoupler U14 is connected between the first resistor R84 and the second resistor R80, and the second end is grounded; the first pin of the wiring terminal JP5, the third resistor R85, the light emitting portion of the optocoupler U14 and the fourth resistor R83 are connected to the ground in sequence; and a first capacitor C48 is provided between the first end and the second end of the switch portion of the optocoupler U14.

[0023] Figure 2 It is a circuit diagram of the communication function module. The communication function module includes a communication chip U4 connected to the main control chip. In this example, the communication chip model is SN65HVD1782. The Vcc pin P8 of the communication chip is connected to the first pin of the terminal JP5, the GND pin P5 is grounded, and the Vcc pin P8 of the communication chip U4 is also grounded through the second capacitor C19. The B pin P7 of the communication chip U4 is connected to the TXD1-B port of the main control chip, the A pin P6 is connected to the RXD1-A port of the main control chip, and the D pin P4 is connected to the TXD1 port of the main control chip. Pin P2 and DE pin P3 are connected to each other and then to the RE / DE port of the main control chip, and R pin P1 is connected to the RXD1 port of the main control chip.

[0024] When the communication function of the dual power supply controller needs to be used and the connection is correct, the terminal JP5 is connected to the external power supply VCC1, the communication chip U4 is powered on, the communication function is realized, and the optocoupler U14 is turned on and the light-emitting diode D5 is off. When the communication function of the dual power supply controller needs to be turned off or the connection is wrong, the terminal JP5 is disconnected from the external power supply VCC1, the communication chip U4 is powered off, the communication function is turned off, and the optocoupler U14 cannot be turned on, and the light-emitting diode D5 lights up to show abnormality.

[0025] Figure 3 The figure is a wiring terminal circuit diagram, in which the indicator light module and the communication function module are respectively connected to the external power supply VCC1 through the wiring terminals.

[0026] The present invention drives the communication chip U4 to connect to the external power supply VCC1 by connecting the connection terminal JP5, thereby realizing the use of the communication function. Once the connection terminal JP5 is connected incorrectly, the light-emitting diode D5 lights up to display an abnormal signal, prompting an alarm. When the communication function is not used, the connection terminal JP5 is not connected, the communication chip U4 has no power supply connection, and cannot communicate, thereby reducing the overall power consumption of the circuit when there is no communication.

[0027] The advantage of the present invention is that it is more intelligent, and while reducing the power consumption of the overall circuit when there is no communication, it avoids the situation where the wiring operator makes a wiring error that causes damage to the equipment. Once the wiring operator connects the power cord incorrectly, the power can be quickly turned off for inspection through the information displayed by the light-emitting diode D5 and the alarm indication issued by the communication chip U4.

[0028] The auxiliary power supply misconnection prevention circuit is used in dual power supply controller systems. When the customer needs to use the communication function, the on-site engineer connects to the terminal JP5. At this time, the power supply VCC1 supplies power to the communication chip U4, the communication chip U4 works, the light-emitting diode D5 indicates normal, and the display is off, and the communication function can be used. If the on-site staff connects the terminal JP5 line sequence incorrectly, that is, the power supply VCC1 is not connected correctly, then after power-on, the communication chip U4 cannot be powered normally, and cannot communicate normally. At the same time, the optocoupler U14 cannot be turned on, causing the light-emitting diode D5 to indicate abnormality and display bright. The operator immediately takes power-off inspection.

[0029] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A communication loading and unloading and anti-wrong connection circuit for a dual power supply controller, used to realize the disconnection of the communication function in the dual power supply controller system and prevent the wrong connection of the terminal, characterized in that: The circuit comprises a wiring terminal (JP5), an indicator light module and a communication function module, an external power supply (VCC1) is connected to the indicator light module and the communication function module respectively through the wiring terminal (JP5), the indicator light module comprises an optical coupler (U14) and a light emitting diode (D5), the cathode of the light emitting diode (D5) is grounded, and the anode of the light emitting diode (D5), a first resistor (R84), a second resistor (R80) and a light emitting power supply (VCC2) are connected in sequence, a first end of a switch part of the optical coupler (U14) is connected between the first resistor (R84) and the second resistor (R80), and a second end is grounded, and the external power supply (VCC1), the wiring terminal (JP5), the third resistor (R85), the light emitting part of the optical coupler (U14) and the fourth resistor (R83) are connected to the ground in sequence; The communication function module comprises a communication chip (U4) connected to the main control chip, and a Vcc pin (P8) of the communication chip (U4) is connected to a wiring terminal (JP5); A first capacitor (C48) is also provided between the first end and the first end of the switch part of the optocoupler (U14).

2. A communication, loading and unloading and anti-wrong connection circuit for a dual power supply controller according to claim 1, characterized in that: The model of the communication chip (U4) is SN65HVD1782.

3. A communication, loading and unloading and anti-wrong connection circuit for a dual power supply controller according to claim 1, characterized in that: The Vcc pin (P8) of the communication chip (U4) is also grounded via a second capacitor (C19).

4. A communication, loading and unloading and anti-wrong connection circuit for a dual power supply controller according to claim 2, characterized in that: The B pin (P7) of the communication chip (U4) is connected to the TXD1-B port of the main control chip, the A pin (P6) is connected to the RXD1-A port of the main control chip, the D pin (P4) is connected to the TXD1 port of the main control chip, the RE (P2) and DE pins (P3) are connected to each other and then connected to the RE / DE port of the main control chip, and the R pin (P1) is connected to the RXD1 port of the main control chip.

5. A communication, loading and unloading and anti-wrong connection circuit for a dual power supply controller according to claim 2, characterized in that: When the communication function of the dual power supply controller needs to be used and the wiring of the wiring terminal (JP5) is correct, the communication chip (U4) is energized with the external power supply (VCC1) to realize the communication function, and the light-emitting part of the optical coupler (U14) is turned on, so that the light-emitting diode (D5) is turned off to indicate normal communication; when the communication function of the dual power supply controller is not needed or the wiring of the wiring terminal (JP5) is wrong, the communication chip (U4) is powered off, the optical coupler (U14) loses power, and the light-emitting diode (D5) is lit to indicate abnormal communication and wiring error.

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