CN116704728A - Dual-power dual-CPU controlled fire alarm controller - Google Patents
Dual-power dual-CPU controlled fire alarm controller Download PDFInfo
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- CN116704728A CN116704728A CN202310756360.3A CN202310756360A CN116704728A CN 116704728 A CN116704728 A CN 116704728A CN 202310756360 A CN202310756360 A CN 202310756360A CN 116704728 A CN116704728 A CN 116704728A
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- 230000000087 stabilizing effect Effects 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000004283 Sodium sorbate Substances 0.000 claims description 6
- 239000004302 potassium sorbate Substances 0.000 claims description 6
- 239000002151 riboflavin Substances 0.000 claims description 6
- 239000004149 tartrazine Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/16—Security signalling or alarm systems, e.g. redundant systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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Abstract
The invention relates to the technical field of fire alarm, in particular to a dual-power dual-CPU-controlled fire alarm controller which has high reliability, safety and stability and comprises a main CPU module, a standby CPU module and a power module, wherein the main CPU module comprises a main MCU chip U101 and a main storage circuit, the standby CPU module comprises a standby MCU chip U201 and a standby storage circuit, the main MCU chip U101 is connected with the standby MCU chip U201 through a communication module, the main MCU chip U101 and the standby MCU chip U201 are connected with an external equipment interface circuit, an alarm circuit and an indicator lamp circuit, and the power module comprises a 24V-to-5V circuit, a main CPU power supply circuit and a standby CPU power supply circuit.
Description
Technical Field
The invention relates to the technical field of fire alarm, in particular to a dual-power dual-CPU-controlled fire alarm controller.
Background
The fire alarm controller is very important equipment in reality, can ensure personal safety and property safety, and plays a vital role in fire emergency treatment. Is a safety equipment system for monitoring fire and sending out early warning signals. The fire disaster monitoring system has the main functions of monitoring fire disaster danger in the environment and sending out alarm signals in time when finding fire disaster so as to take countermeasures in time to reduce fire disaster loss. The fire alarm controller can control the alarm device after receiving the alarm signal, and sends out alarm signals such as a bell, a flash lamp and the like to remind personnel to escape from a dangerous area in time.
The fire alarm controller has the following functions:
1. protecting property safety: the fire alarm controller can timely detect fire and inform the fire department of the front of the door to put out the fire, so as to protect property safety.
2. The fire loss is reduced: the fire alarm controller can detect fire early, take fire extinguishing measures in time and reduce fire loss.
3. The fire emergency treatment efficiency is improved: the fire alarm controller can monitor fire conditions in real time, improves emergency treatment efficiency, and avoids fire spread.
Therefore, fire alarm controllers should be equipped in public places such as buildings, factories, shops, hotels, etc. to ensure life safety and property safety of people.
However, the existing fire alarm has the following disadvantages:
1. sometimes, the circuit is tripped and powered off due to a large power load, and meanwhile, a standby power supply is not used for supplying power on site, so that the fire alarm system cannot work normally.
2. The system paralysis of the fire alarm controller can cause that some important fire-fighting equipment cannot be started, and sometimes even if the system is maintained, some important data in the controller are lost, such as linkage programming, position description, history record and the like.
Therefore, reliability, safety, and stability are poor.
Disclosure of Invention
In order to solve the problems of poor reliability, safety and stability and high maintenance cost of the existing fire alarm controller, the invention provides a dual-power dual-CPU-controlled fire alarm controller which has high reliability, safety and stability.
The technical scheme is as follows: the fire alarm controller is characterized by comprising a main CPU module, a standby CPU module and a power module, wherein the main CPU module comprises a main MCU chip U101 and a main storage circuit, the standby CPU module comprises a standby MCU chip U201 and a standby storage circuit, the main MCU chip U101 and the standby MCU chip U201 are connected through a communication module, the main MCU chip U101 and the standby MCU chip U201 are connected with an external equipment interface circuit, an alarm circuit and an indicator light circuit, and the power module comprises a 24V-to-5V circuit, a main CPU power supply circuit and a standby CPU power supply circuit; the model of the main MCU chip U101 is GD32F103VET6, the main memory circuit comprises a flash memory chip U104, the model of the main memory circuit is W25Q128, and pins 89 to 92 of the main MCU chip U101 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U104; the model of the standby MCU chip U201 is GD32F103VET6, the standby memory circuit comprises a flash memory chip U204, the model of the flash memory chip U is W25Q128, and pins 55 to 58 of the standby MCU chip U201 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U204; the communication module comprises a communication chip U102 and a communication chip U202, the models are MAX3485, the 1 pin, the 4 pin, the 2 pin and the 3 pin which are connected with each other of the communication chip U102 are respectively connected with the 26 pin, the 25 pin and the 24 pin of the main MCU chip U101, the 1 pin, the 4 pin, the 2 pin and the 3 pin which are connected with each other of the communication chip U202 are respectively connected with the 17 pin, the 16 pin and the 15 pin of the main MCU chip U101, and the 6 pin, the 7 pin and the 6 pin and the 7 pin of the communication chip U102 are connected with each other of the communication chip U202.
The 24V-to-5V circuit is further characterized by comprising a buck conversion chip U1, the model is XL2576, a 1 pin of the buck conversion chip U1 is connected with one end of a capacitor C1, one end of a capacitor E1 and one end of a fuse F1, the other end of the fuse F1 is connected with a common cathode of a common cathode diode D1, two anodes of the common cathode diode D1 are respectively connected with two paths of 24V power interfaces X5 and X6, a 2 pin of the buck conversion chip U1 is connected with a cathode of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is connected with a cathode of a diode T1, one end of a capacitor C2 and one end of a capacitor E2, the other end of the buck conversion chip U1 is a 5V output end, and the other end of the capacitor E1, the other end of the capacitor C1, the 3 pin and the 5 pin of the buck conversion chip U1, the anode of the diode D2, the anode of the diode T1, the other end of the capacitor C2 and the other end of the capacitor E2 are all grounded; the main CPU power supply circuit comprises a voltage stabilizing chip U103, wherein a 3 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C112, one end of a capacitor E101 and the cathode of a diode D201, the anode of the diode D201 is connected with the 5V output end of the 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C113 and one end of a capacitor E102 and is a 3.3V output end, and the other end of the capacitor E101, the other end of the capacitor C112, the 1 pin of the voltage stabilizing chip U103, the other end of the capacitor C113 and the other end of the capacitor E102 are all grounded; the standby CPU power supply circuit comprises a voltage stabilizing chip U203, wherein a 3 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C210, one end of a capacitor E201 and the cathode of a diode D202, the anode of the diode D202 is connected with the 5V output end of the 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C211 and one end of the capacitor E202 and is a 3.3V output end, and the other end of the capacitor E201, the other end of the capacitor C210, the 1 pin of the voltage stabilizing chip U203, the other end of the capacitor C211 and the other end of the capacitor E202 are all grounded;
the external equipment interface circuit comprises seven paths of interface circuits, a transistor array U2 and an interface J9, each path of interface circuit comprises an SS184 common cathode diode, a relay and a rectifier diode, two anodes of the SS184 common cathode diodes are respectively connected with a main MCU chip U101, a standby MCU chip U201 and a common cathode, the common cathode is connected with a 5 pin of the relay and an anode of the rectifier diode through the transistor array U2, a cathode of the rectifier diode is connected with a 4 pin of the relay, and a contact switch 1 pin, a contact 2 pin and a contact 3 pin of the relay are all connected with the interface J9;
the alarm circuit comprises an audible alarm circuit and an indicator lamp circuit, the audible alarm circuit comprises a triode Q101, the base electrode of the triode Q101 is connected with the common cathode of a common cathode diode D901, two anodes of the common cathode diode D901 are respectively connected with one end of a resistor R105 and one end of a resistor R205, the other end of the resistor R105 is connected with the 83 pin of the main MCU chip U101, the other end of the resistor R205 is connected with the 54 pin of the standby MCU chip U201, the collector electrode of the triode is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the 2 pin of a loudspeaker SP, and the 1 pin of the loudspeaker SP is connected with a 24V power supply; the indicator light circuit comprises eight paths of LED indicator lights.
After the fire alarm system is adopted, the fire alarm system is provided with two CPUs, namely the main CPU and the standby CPU, the main CPU controls all functions of the whole fire alarm controller under normal conditions, and the standby CPU is connected with the functions of the fire alarm controller under abnormal conditions of the main CPU, so that the normal operation of the fire alarm system is ensured; the main CPU and the standby CPU communicate with each other and transmit data to each other through the communication circuit, so that data loss can not occur, and the reliability, safety and stability of the system are improved.
Drawings
FIG. 1 is a schematic diagram of a system of the present invention;
FIG. 2 is a schematic circuit diagram of a main CPU module;
FIG. 3 is a schematic diagram of a standby CPU module circuit;
FIG. 4 is a schematic circuit diagram of a communication module;
FIG. 5 is a schematic diagram of a power module circuit;
FIG. 6 is a schematic diagram of an external device interface circuit;
FIG. 7 is a schematic diagram of an alarm circuit;
fig. 8 is a schematic diagram of an indicator light circuit.
Detailed Description
Referring to fig. 1 to 8, a dual-power dual-CPU controlled fire alarm controller includes a main CPU module, a standby CPU module, and a power module, where the main CPU module includes a main MCU chip U101 and a main memory circuit, the standby CPU module includes a standby MCU chip U201 and a standby memory circuit, the main MCU chip U101 and the standby MCU chip U201 are connected by a communication module, the main MCU chip U101 and the standby MCU chip U201 are connected with an external device interface circuit, an alarm circuit, and an indicator light circuit, and the power module includes a 24V to 5V circuit, a main CPU power supply circuit, and a standby CPU power supply circuit. The main CPU module is connected with the LCD liquid crystal screen, the keys and the printer, the standby CPU module is connected with the external equipment starting key, the main CPU module and the standby CPU module are both provided with I/O expansion, and the bus interface is connected to the main CPU module.
The model of the main MCU chip U101 is GD32F103VET6, the main memory circuit comprises a flash memory chip U104, the model of the main memory chip U is W25Q128, and pins 89 to 92 of the main MCU chip U101 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U104; the model of the standby MCU chip U201 is GD32F103VET6, the standby memory circuit comprises a flash memory chip U204, the model of the standby memory circuit is W25Q128, and pins 55 to 58 of the standby MCU chip U201 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U204.
The communication module comprises a communication chip U102 and a communication chip U202, wherein the types of the communication chip U102 are MAX3485, the 1 pin, the 4 pin, the connected 2 pin and the 3 pin of the communication chip U102 are respectively connected with the 26 pin, the 25 pin and the 24 pin of the main MCU chip U101, the 1 pin, the 4 pin, the connected 2 pin and the 3 pin of the communication chip U202 are respectively connected with the 17 pin, the 16 pin and the 15 pin of the main MCU chip U101, and the 6 pin and the 7 pin of the communication chip U102 are connected with the 6 pin and the 7 pin of the communication chip U202; the main CPU module and the standby CPU module communicate with each other and mutually transmit data through a 485 communication circuit, the main MCU chip U101 stores important data such as alarm data, historical data, linkage programming, bit number conversion and the like in the flash memory chip U104, and simultaneously transmits the important data to the standby MCU chip U201 in real time, and the standby MCU chip U201 stores the important data in the flash memory chip U204 without losing the data. When the main CPU module is broken, all data are lost, and after the maintenance is finished, all stored data of the standby CPU can be read into the main CPU module, so that the system is quickly recovered to be the same as the original system.
The 24V-to-5V circuit comprises a buck conversion chip U1, the model is XL2576, a 1 pin of the buck conversion chip U1 is connected with one end of a capacitor C1, one end of a capacitor E1 and one end of a fuse F1, the other end of the fuse F1 is connected with a common cathode of a common cathode diode D1, two anodes of the common cathode diode D1 are respectively connected with two paths of 24V power interfaces X5 and X6, a 2 pin of the buck conversion chip U1 is connected with a cathode of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is connected with the cathode of the diode T1, one end of the capacitor C2, one end of the buck conversion chip U1, the 4 pin of the buck conversion chip U1 and the 5V output end are grounded, and the other end of the capacitor E1, the other end of the capacitor C1, the 3 pin and the 5 pin of the buck conversion chip U1, the anode of the diode D2, the other end of the capacitor C2 and the other end of the capacitor E2 are grounded; the main CPU power supply circuit comprises a voltage stabilizing chip U103, wherein a 3 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C112, one end of a capacitor E101 and the cathode of a diode D201, the anode of the diode D201 is connected with the 5V output end of a 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C113, one end of a capacitor E102 and is a 3.3V output end, the other end of the capacitor E101, the other end of the capacitor C112, the 1 pin of the voltage stabilizing chip U103, the other end of the capacitor C113 and the other end of the capacitor E102 are all grounded; the standby CPU power supply circuit comprises a voltage stabilizing chip U203, wherein a 3 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C210, one end of a capacitor E201 and the cathode of a diode D202, the anode of the diode D202 is connected with the 5V output end of a 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C211, one end of the capacitor E202 and is a 3.3V output end, the other end of the capacitor E201, the other end of the capacitor C210, the 1 pin of the voltage stabilizing chip U203, the other end of the capacitor C211 and the other end of the capacitor E202 are all grounded; the 24V power supply and the 3.3V voltage are two paths, so that double protection on the power supply is ensured, the main CPU module and the standby CPU module are independently powered, and the standby CPU module can still maintain the operation of the fire alarm system even if the main CPU module is not powered and cannot work.
The external equipment interface circuit comprises seven paths of interface circuits, a transistor array U2 and an interface J9, each path of interface circuit comprises four SS184 common-cathode diodes D301-D307, relays JD1-JD7 and rectifying diodes D101-D107, two anodes of each SS184 common-cathode diode are respectively connected with a main MCU chip U101 and a standby MCU chip U201, a common cathode is connected with a 5 pin corresponding to a single relay and an anode corresponding to the single rectifying diode through the transistor array U2, a cathode of each rectifying diode is connected with a 4 pin of the corresponding relay, and a contact switch 1 pin, a contact switch 2 pin and a contact 3 pin of each relay are all connected with the interface J9. The main CPU module and the standby CPU module are respectively provided with an independent external device control interface, and the corresponding input ends are controlled by the relay switch.
The alarm circuit comprises a triode Q101, the base electrode of the triode Q101 is connected with the common cathode of a common cathode diode D901, two anodes of the common cathode diode D901 are respectively connected with one end of a resistor R105 and one end of a resistor R205, the other end of the resistor R105 is connected with the 83 pin of a main MCU chip U101, the other end of the resistor R205 is connected with the 54 pin of a standby MCU chip U201, the collector electrode of the triode is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the 2 pin of a loudspeaker SP, the 1 pin of the loudspeaker SP is connected with a 24V power supply, and when one of a main CPU module and a standby CPU module fails, a fault alarm signal can be independently sent to the sound alarm circuit; the pilot lamp circuit includes eight way LED pilot lamps, pilot lamp LED1 is main CPU power supply pilot lamp, pilot lamp LED2 is main CPU work pilot lamp, pilot lamp LED3 is backup CPU work pilot lamp, pilot lamp LED4 is main CPU fault indication lamp, pilot lamp LED5 is backup fault indication lamp, pilot lamp LED6 is external equipment start-up pilot lamp, pilot lamp LED7 is fire alarm pilot lamp, pilot lamp LED8 is backup CPU power supply pilot lamp, every LED pilot lamp links respectively has resistance R501-R508.
Under normal conditions, the main CPU module controls all functions of the whole fire alarm controller; in the case of an abnormality of the main CPU module, the standby CPU module will take over the function of the fire alarm controller.
The main CPU module breaks down, and the standby CPU module can lighten a main CPU module fault indicator lamp and send out fault sound to prompt staff; similarly, the standby CPU module fails, and the main CPU module can light the standby CPU module failure indicator lamp and send out a failure sound to prompt staff; when 485 communication circuit between main CPU module and the reserve CPU module breaks down, main CPU module fault indicator lamp and reserve CPU module fault indicator lamp all can be lighted to send out the trouble sound and instruct the staff, seek the reason and in time maintain, guarantee that entire system normal operating. The standby CPU module fails, the main CPU module is normal, and all functions of the fire alarm system are not affected under the condition; the main CPU module fails, the standby CPU module is normal, the LCD of the fire alarm system is abnormally displayed under the condition that the printer cannot print, and part of the digital keys fail, so that some important external controlled devices can be started through the external device starting keys. For example: important fire-fighting equipment such as water spraying, rolling doors, elevators, fireproof doors and the like.
Claims (4)
1. The fire alarm controller is characterized by comprising a main CPU module, a standby CPU module and a power module, wherein the main CPU module comprises a main MCU chip U101 and a main storage circuit, the standby CPU module comprises a standby MCU chip U201 and a standby storage circuit, the main MCU chip U101 and the standby MCU chip U201 are connected through a communication module, the main MCU chip U101 and the standby MCU chip U201 are connected with an external equipment interface circuit, an alarm circuit and an indicator light circuit, and the power module comprises a 24V-to-5V circuit, a main CPU power supply circuit and a standby CPU power supply circuit; the model of the main MCU chip U101 is GD32F103VET6, the main memory circuit comprises a flash memory chip U104, the model of the main memory circuit is W25Q128, and pins 89 to 92 of the main MCU chip U101 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U104; the model of the standby MCU chip U201 is GD32F103VET6, the standby memory circuit comprises a flash memory chip U204, the model of the flash memory chip U is W25Q128, and pins 55 to 58 of the standby MCU chip U201 are respectively connected with pins 6, 2, 5 and 1 of the flash memory chip U204; the communication module comprises a communication chip U102 and a communication chip U202, the models are MAX3485, the 1 pin, the 4 pin, the 2 pin and the 3 pin which are connected with each other of the communication chip U102 are respectively connected with the 26 pin, the 25 pin and the 24 pin of the main MCU chip U101, the 1 pin, the 4 pin, the 2 pin and the 3 pin which are connected with each other of the communication chip U202 are respectively connected with the 17 pin, the 16 pin and the 15 pin of the main MCU chip U101, and the 6 pin, the 7 pin and the 6 pin and the 7 pin of the communication chip U102 are connected with each other of the communication chip U202.
2. The dual-power dual-CPU-controlled fire alarm controller according to claim 1, wherein the 24V-to-5V circuit comprises a buck conversion chip U1, the model is XL2576, pin 1 of the buck conversion chip U1 is connected to one end of a capacitor C1, one end of a capacitor E1, one end of a fuse F1, the other end of the fuse F1 is connected to a common cathode of a common cathode diode D1, two anodes of the common cathode diode D1 are respectively connected to two paths 24V power interfaces X5 and X6, pin 2 of the buck conversion chip U1 is connected to a cathode of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is connected to a cathode of a diode T1, one end of a capacitor C2, one end of a capacitor E2, pin 4 of the buck conversion chip U1 and is a 5V output end, and the other end of the capacitor E1, the other ends of the capacitor C1, pins 3 and 5, the anode of the diode D2, the anode of the diode T1, the other end of the capacitor C2, and the other end of the capacitor E2 are all grounded; the main CPU power supply circuit comprises a voltage stabilizing chip U103, wherein a 3 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C112, one end of a capacitor E101 and the cathode of a diode D201, the anode of the diode D201 is connected with the 5V output end of the 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U103 is connected with one end of a capacitor C113 and one end of a capacitor E102 and is a 3.3V output end, and the other end of the capacitor E101, the other end of the capacitor C112, the 1 pin of the voltage stabilizing chip U103, the other end of the capacitor C113 and the other end of the capacitor E102 are all grounded; the standby CPU power supply circuit comprises a voltage stabilizing chip U203, wherein a 3 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C210, one end of a capacitor E201 and the cathode of a diode D202, the anode of the diode D202 is connected with the 5V output end of the 24V-to-5V circuit, a 2 pin of the voltage stabilizing chip U203 is connected with one end of a capacitor C211, one end of the capacitor E202 and is a 3.3V output end, and the other end of the capacitor E201, the other end of the capacitor C210, the 1 pin of the voltage stabilizing chip U203, the other end of the capacitor C211 and the other end of the capacitor E202 are all grounded.
3. The dual-power dual-CPU-controlled fire alarm controller according to claim 1, wherein the external equipment interface circuit comprises seven paths of interface circuits, a transistor array U2 and an interface J9, each path of interface circuit comprises an SS184 common cathode diode, a relay and a rectifier diode, two anodes of the SS184 common cathode diode are respectively connected with the main MCU chip U101 and the standby MCU chip U201, a common cathode is connected with a 5 pin of the relay and an anode of the rectifier diode through the transistor array U2, a cathode of the rectifier diode is connected with a 4 pin of the relay, and a contact switch 1 pin, a contact 2 pin and a contact 3 pin of the relay are all connected with the interface J9.
4. The dual-power dual-CPU-controlled fire alarm controller according to claim 1, wherein the alarm circuit comprises an audible alarm circuit and an indicator lamp circuit, the audible alarm circuit comprises a triode Q101, a base electrode of the triode Q101 is connected with a common cathode of a common cathode diode D901, two anodes of the common cathode diode D901 are respectively connected with one end of a resistor R105 and one end of a resistor R205, the other end of the resistor R105 is connected with a pin 83 of the main MCU chip U101, the other end of the resistor R205 is connected with a pin 54 of the standby MCU chip U201, a collector electrode of the triode is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a pin 2 of a loudspeaker SP, and a pin 1 of the loudspeaker SP is connected with a 24V power supply; the indicator light circuit comprises eight paths of LED indicator lights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756360.3A CN116704728A (en) | 2023-06-26 | 2023-06-26 | Dual-power dual-CPU controlled fire alarm controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756360.3A CN116704728A (en) | 2023-06-26 | 2023-06-26 | Dual-power dual-CPU controlled fire alarm controller |
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| Publication Number | Publication Date |
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| CN116704728A true CN116704728A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310756360.3A Pending CN116704728A (en) | 2023-06-26 | 2023-06-26 | Dual-power dual-CPU controlled fire alarm controller |
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| CN (1) | CN116704728A (en) |
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2023
- 2023-06-26 CN CN202310756360.3A patent/CN116704728A/en active Pending
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