CN215768937U - Reverse connection prevention indication alarm circuit of direct current power supply system - Google Patents
Reverse connection prevention indication alarm circuit of direct current power supply system Download PDFInfo
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- CN215768937U CN215768937U CN202122204455.3U CN202122204455U CN215768937U CN 215768937 U CN215768937 U CN 215768937U CN 202122204455 U CN202122204455 U CN 202122204455U CN 215768937 U CN215768937 U CN 215768937U
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Abstract
The utility model discloses an anti-reverse connection indication alarm circuit of a direct current power supply system, which relates to the technical field of wiring alarm.A current limiting resistor R1, a current limiting resistor R2, a current limiting resistor R3 and a current limiting resistor R4 are respectively connected with the cathode of a direct current power supply; the other end of the current-limiting resistor R1 is connected with the cathode of the light-emitting diode H1, the anode of the light-emitting diode H1 is connected with the cathode of the rectifier diode D1, and the anode of the rectifier diode D1 is connected with the anode of the direct-current power supply; the other end of the current-limiting resistor R2 is connected with the anode of the light-emitting diode H2, the cathode of the light-emitting diode H2 is connected with the anode of the rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the anode of the direct-current power supply; the other end of the current-limiting resistor R3 is connected with one end of a buzzer FM1, and the other end of the buzzer FM1 is connected with the anode of a rectifier diode D2; the other end of the current limiting resistor R4 is connected with one end of the relay module, and the other end of the relay module is connected with the anode of the rectifier diode D2.
Description
Technical Field
The utility model relates to the technical field of wiring alarm, in particular to a reverse connection prevention indication alarm circuit of a direct current power supply system.
Background
In the actual wiring process, when the polarity wiring of the power supply of the direct-current power supply system is abnormal, the polarity wiring is usually reversely connected, and when the situation occurs, the circuit is difficult to find the abnormality in the initial daily use process, but electric shock is easily caused, and some household appliances cannot normally work, so that it is necessary to design a circuit capable of detecting the polarity reverse connection of the direct-current power supply and timely alarming and reminding.
The direct-current power supply reverse connection prevention indication alarm circuit effectively solves the defects that the input polarity of the conventional direct-current power supply is reverse connected and no field and remote alarm exist, when the wiring polarity is correct, the field power supply indicator lamp is on, and a reverse connection alarm system does not work (the alarm indicator lamp, the buzzer and the remote alarm dry contact point do not respond); when the polarity of the power supply is reversely connected, the power-on indicator lamp is turned off, the reverse connection alarm system is started (the alarm indicator lamp is turned on, the buzzer sounds, the remote alarm main contact outputs a normally closed signal), and three kinds of alarm information such as on-site sound, light and remote signaling main contacts are provided.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides a reverse connection prevention indication alarm circuit of a direct current power supply system, and solves the problems that the reverse connection of the direct current power supply is difficult to find and potential safety hazards exist.
The purpose of the utility model is realized by the following technical scheme:
the direct current power supply system reverse connection prevention indication alarm circuit comprises a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a rectifier diode D1, a rectifier diode D2, a light-emitting diode H1, a light-emitting diode H2, a buzzer FM1 and a relay module;
one end of each of the current limiting resistor R1, the current limiting resistor R2, the current limiting resistor R3 and the current limiting resistor R4 is connected with the negative electrode of the direct-current power supply;
the other end of the current-limiting resistor R1 is connected with the cathode of the light-emitting diode H1, the anode of the light-emitting diode H1 is connected with the cathode of the rectifier diode D1, and the anode of the rectifier diode D1 is connected with the anode of the direct-current power supply;
the other end of the current-limiting resistor R2 is connected with the anode of a light-emitting diode H2, the cathode of the light-emitting diode H2 is connected with the anode of a rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the anode of a direct-current power supply;
the other end of the current-limiting resistor R3 is connected with one end of a buzzer FM1, and the other end of the buzzer FM1 is connected with the anode of a rectifier diode D2;
the other end of the current-limiting resistor R4 is connected with one end of the relay module, and the other end of the relay module is connected with the anode of the rectifier diode D2.
Further, the relay module is a photoelectric coupler IC1 or a relay J1.
Further, dry contacts of the photocoupler IC1 or the relay J1 are used as a dry contact output A and a dry contact output B.
Further, the relay module selects a photoelectric coupler IC1, the driving positive electrode of the photoelectric coupler IC1 is connected with the other end of the current-limiting resistor R4, and the driving negative electrode of the photoelectric coupler IC1 is connected with the positive electrode of the rectifier diode D2.
Further, the light emitting diode H1 is a green LED lamp, and the light emitting diode H2 is a red LED lamp.
Furthermore, the current limiting resistor R1 and the current limiting resistor R2 are resistors with the resistance value of 1k omega-50 k omega and the power of 0.5W-2W.
Furthermore, the current limiting resistor R3 is a resistor with a resistance value of 1k omega-10 k omega and a power of 1W-2W, and the current limiting resistor R4 is a resistor with a resistance value of 1k omega-50 k omega and a power of 1W-2W.
The utility model has the beneficial effects that:
1. the circuit element has high sensitivity and good reliability, can be completely compatible with direct current power supply systems in all voltage ranges, and provides on-site sound and light alarm indication and remote signaling alarm trunk contact signals.
2. The positive and negative polarity reverse connection indication alarm circuit of the power supply only alarms when wiring is performed to remind engineering installation personnel, wiring can be immediately corrected after a wiring error is identified, the current is lower than 40mA when the alarm system works, the correct wiring alarm circuit cannot work after a fault is eliminated, power is normally indicated to be on, the working current does not exceed 5mA, and energy waste is avoided.
Drawings
FIG. 1 is a schematic circuit diagram of a photocoupler IC1 selected as a relay module according to the present invention;
fig. 2 is a schematic circuit diagram of the relay module of the present invention, which uses relay J1.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1-2 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other implementations made by those of ordinary skill in the art based on the embodiments of the present invention are obtained without inventive efforts.
In the description of the present invention, it is to be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.
The direct current power supply system reverse connection prevention indication alarm circuit comprises a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a rectifier diode D1, a rectifier diode D2, a light-emitting diode H1, a light-emitting diode H2, a buzzer FM1 and a relay module;
one end of each of the current limiting resistor R1, the current limiting resistor R2, the current limiting resistor R3 and the current limiting resistor R4 is connected with the negative electrode of the direct-current power supply;
the other end of the current-limiting resistor R1 is connected with the cathode of the light-emitting diode H1, the anode of the light-emitting diode H1 is connected with the cathode of the rectifier diode D1, and the anode of the rectifier diode D1 is connected with the anode of the direct-current power supply;
the other end of the current-limiting resistor R2 is connected with the anode of a light-emitting diode H2, the cathode of the light-emitting diode H2 is connected with the anode of a rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the anode of a direct-current power supply;
the other end of the current-limiting resistor R3 is connected with one end of a buzzer FM1, and the other end of the buzzer FM1 is connected with the anode of a rectifier diode D2;
the other end of the current-limiting resistor R4 is connected with one end of the relay module, and the other end of the relay module is connected with the anode of the rectifier diode D2.
Further, the relay module is a photoelectric coupler IC1 or a relay J1.
Further, dry contacts of the photocoupler IC1 or the relay J1 are used as a dry contact output A and a dry contact output B.
Further, the relay module selects a photoelectric coupler IC1, the driving positive electrode of the photoelectric coupler IC1 is connected with the other end of the current-limiting resistor R4, and the driving negative electrode of the photoelectric coupler IC1 is connected with the positive electrode of the rectifier diode D2.
Further, the light emitting diode H1 is a green LED lamp, and the light emitting diode H2 is a red LED lamp.
Furthermore, the current limiting resistor R1 and the current limiting resistor R2 are resistors with the resistance value of 1k omega-50 k omega and the power of 0.5W-2W.
Furthermore, the current limiting resistor R3 is a resistor with a resistance value of 1k omega-10 k omega and a power of 1W-2W, and the current limiting resistor R4 is a resistor with a resistance value of 1k omega-50 k omega and a power of 1W-2W.
Example (b):
one end of each of current-limiting resistors R1, R2, R3 and R4 is connected with the negative electrode of a power supply, the other end of R1 is connected with the negative electrode of a light-emitting diode H1, the positive electrode of H1 is connected with the negative electrode of a rectifier diode D1, and the positive electrode of D1 is connected with the positive electrode of the power supply; the other end of the R2 is connected with the anode of a light-emitting diode H2, the cathode of H2 is connected with the anode of D2, and the cathode of D2 is connected with the anode of a power supply; the other end of R3 is connected with either end of a buzzer FM1, and the other end of FM1 is connected with the positive pole of D2; the other end of R4 is connected with the driving positive pole of relay J1 or photocoupler IC1, the other end of J1 (or IC1 driving negative pole) is connected with the positive pole of D2, and the dry contact of J1 or IC1 is used as a dry contact signal output A, B; when the polarity of the power supply is connected positively, the light-emitting diode H1 is bright, the H1 is green, the buzzer does not sound, the light-emitting diode H2 does not light, when the polarity of the power supply is connected reversely, the H1 is not bright, the H2 is bright, the H2 is red light, the buzzer FM1 sounds, the dry contact outputs an alarm signal, and site sound and light alarm and remote dry contact alarm are carried out.
When the relay module selects the photoelectric coupler IC1, the resistors R1 and R2: 0.5-2W/1 k omega-50 k omega, resistance R3: 1-2W/1 k omega-10 k omega, resistance R4: 1-2W/1 k omega-50 k omega, diodes D1, D2: a diode: forward current: 1A reverse voltage: 50V-1200V surge current: 30A forward voltage: 1V, light emitting diodes H1, H2: current: 20mA power: voltage of 0.06W: 1-5V, buzzer FM 1: the working voltage range is 1.0-50V, the maximum current is 200mA, the resistance is 1-50 omega frequency: 3000Hz, photocoupler IC 1: working voltage: 1-50V, insulation and voltage resistance: 2.5-5.0 kv;
when the relay J1 is selected as the relay module, the resistances R1 and R2: 0.5-2W/1 k omega-50 k omega, resistance R3: 1-2W/1 k omega-10 k omega, resistance R4: 1-2W/1 k omega-50 k omega, diodes D1, D2: a diode: forward current: 1A reverse voltage: 50V-1200V surge current: 30A forward voltage: 1V, light emitting diodes H1, H2: current: 20mA power: voltage of 0.06W: 1-5V, buzzer FM 1: the working voltage range is 1.0-50V, the maximum current is 200mA, the resistance is 1-50 omega frequency: 3000Hz, relay J1: working voltage: 5-48V.
The foregoing is merely a preferred embodiment of the utility model, it being understood that the embodiments described are part of the utility model, and not all of it. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The utility model is not intended to be limited to the forms disclosed herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. The direct current power supply system reverse connection prevention indication alarm circuit is characterized by comprising a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a rectifier diode D1, a rectifier diode D2, a light-emitting diode H1, a light-emitting diode H2, a buzzer FM1 and a relay module;
one end of each of the current limiting resistor R1, the current limiting resistor R2, the current limiting resistor R3 and the current limiting resistor R4 is connected with the negative electrode of the direct-current power supply; the other end of the current-limiting resistor R1 is connected with the cathode of the light-emitting diode H1, the anode of the light-emitting diode H1 is connected with the cathode of the rectifier diode D1, and the anode of the rectifier diode D1 is connected with the anode of the direct-current power supply;
the other end of the current-limiting resistor R2 is connected with the anode of a light-emitting diode H2, the cathode of the light-emitting diode H2 is connected with the anode of a rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the anode of a direct-current power supply;
the other end of the current-limiting resistor R3 is connected with one end of a buzzer FM1, and the other end of the buzzer FM1 is connected with the anode of a rectifier diode D2;
the other end of the current-limiting resistor R4 is connected with one end of the relay module, and the other end of the relay module is connected with the anode of the rectifier diode D2.
2. The reverse-connection-prevention indication alarm circuit of the direct-current power supply system as claimed in claim 1, wherein the relay module is selected from a photocoupler IC1 or a relay J1.
3. The dc power supply system reverse connection prevention indication alarm circuit according to claim 2, wherein dry contacts of the photocoupler IC1 or the relay J1 are taken as a dry contact output a and a dry contact output B.
4. The reverse connection prevention indication alarm circuit of the direct current power supply system according to claim 2, wherein the relay module is a photocoupler IC1, a driving positive electrode of the photocoupler IC1 is connected with the other end of the current limiting resistor R4, and a driving negative electrode of the photocoupler IC1 is connected with a positive electrode of a rectifier diode D2.
5. The reverse-connection-prevention indication alarm circuit of the direct-current power supply system as claimed in claim 1, wherein the light emitting diode H1 is a green LED lamp tube, and the light emitting diode H2 is a red LED lamp tube.
6. The reverse connection prevention indication alarm circuit of the DC power supply system as claimed in claim 1, wherein the current limiting resistor R1 and the current limiting resistor R2 are resistors with resistance value of 1k Ω -50 k Ω and power of 0.5W-2W.
7. The reverse connection prevention indication alarm circuit of the DC power supply system as claimed in claim 6, wherein the current limiting resistor R3 is a resistor with a resistance value of 1k Ω -10 k Ω and a power of 1W-2W, and the current limiting resistor R4 is a resistor with a resistance value of 1k Ω -50 k Ω and a power of 1W-2W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204455.3U CN215768937U (en) | 2021-09-15 | 2021-09-15 | Reverse connection prevention indication alarm circuit of direct current power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204455.3U CN215768937U (en) | 2021-09-15 | 2021-09-15 | Reverse connection prevention indication alarm circuit of direct current power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215768937U true CN215768937U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122204455.3U Active CN215768937U (en) | 2021-09-15 | 2021-09-15 | Reverse connection prevention indication alarm circuit of direct current power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215768937U (en) |
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2021
- 2021-09-15 CN CN202122204455.3U patent/CN215768937U/en active Active
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