CN209248710U - A kind of two lines bus type fire display panel - Google Patents

Abstract

The utility model relates to a kind of two lines bus type fire display panels, including rectification filtering unit, power supply unit, communication unit, display unit, microprocessor, key and lamp control unit and sound driver unit；The input terminal of rectification filtering unit connects fire-fighting two lines bus, and the first end of rectification filtering unit connects power supply, the second end connecting communication unit of rectification filtering unit；Microprocessor and communication unit, power supply unit, display unit, sound unit and key and lamp control unit.The utility model uses the nonpolarity fire-fighting two lines bus of two-wire system, and fire-fighting two lines bus can power to product can be carried out communication again, low in energy consumption since using 2 line systems, wiring is simple, facilitates site operation step and reduces construction cost.

Description

A kind of two lines bus type fire display panel

Technical field

The utility model relates to fire protection warning technical field more particularly to a kind of two lines bus type fire display panels.

Background technique

In fire protection alarm system, fire display panel is as a kind of fire alarm display device, for fiery when occurring in building After calamity, the controller of fire protection control center is transferred to warning message on the fire display panel in the region that catches fire, and fire display panel is aobvious Number, type and the annotation information at display screen display alarm position simultaneously issue sound and light alarm signal, to notify the personnel in region of catching fire. The disadvantages of traditional fire display panel generally uses 4 line systems, and wiring is complicated, and power consumption is high, and wiring cost is high.

Utility model content

The purpose of this utility model is that in place of solving the above deficiencies in the existing technologies.

To achieve the above object, the utility model provides a kind of two lines bus type fire display panel, including rectification filtering unit, Power supply unit, communication unit, display unit, microprocessor, key and lamp control unit and sound driver unit；Rectification filter The input terminal connection fire-fighting two lines bus of wave unit, the first end connection power supply of rectification filtering unit, the second of rectification filtering unit Hold connecting communication unit；Microprocessor and communication unit, power supply unit, display unit, sound unit and key and lamp control Unit.

Preferably, rectification filtering unit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, One diode VD1, the 7th diode VD7, third diode VD3, the 8th diode VD8, the 4th diode VD4, first capacitor C1, the second capacitor C2, the 5th capacitor C5 and the first electrolytic capacitor E1；One end of first resistor R1 and BUS1, first capacitor C1 One end is connected, and the other end of first resistor R1 is connected with the cathode of the anode of VD3, the 8th diode VD8, first capacitor The other end of C1 is grounded；One end of second resistance R2 is connected with one end of BUS2, the 5th capacitor C5, and second resistance R2's is another End is connected with the cathode of the anode of VD1, the 7th diode VD7, the other end ground connection of the 5th capacitor C5；First diode VD1 Cathode be connected with one end of the cathode of third diode VD3, BUS, the anode of the 4th diode VD4,3rd resistor R3, The cathode of four diode VD4 connects one end of the 4th resistance R4, the other end of the 4th resistance R4, one end of the second capacitor C2, the The anode of one electrolytic capacitor E1 is connected with the first level respectively, and the other end of the second capacitor and the first electrolytic capacitor E1's bears Pole, the other end of 3rd resistor R3, the anode of the 7th diode VD7 and the 8th diode VD8 anode be connected.

Preferably, power supply unit includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, DCDC core Piece U1, third capacitor C3, the 4th capacitor C4, the first inductance L1 and the 5th electrolytic capacitor E5；The first pin of DCDC chip U1 BST, one end of third capacitor C3, the 5th pin VCC of DCDC chip U1, the 5th resistance R5 one end respectively with the first level phase It connects, the 4th pin EN of DCDC chip U1 is connected with one end of the other end of the 5th resistance R5, the 6th resistance R6, DCDC core The third pin FB of piece U1 is connected with one end of one end of the 7th resistance R7, the 8th resistance R8, and the 6th of DCDC chip U1 the Pin LX is connected with one end of the other end of third capacitor, the first inductance L1, the other end, the 8th resistance R8 of the first inductance L1 The other end, the anode of the 5th electrolytic capacitor E5, one end of the 4th capacitor C4 be connected respectively with positive pole, the 6th resistance R6 The other end ground connection, DCDC chip U1 second pin GND ground connection, the 7th resistance R7 the other end ground connection, the 5th electrolytic capacitor The cathode of E5 is grounded, the other end ground connection of the 4th capacitor C4.

Preferably, display unit includes backlight and interface；The anode connection positive pole of backlight, the cathode of backlight pass through the 58 resistance connect the collector of the tenth NPN type triode V10, and the base stage of the tenth NPN type triode V10 passes through the 59th Resistance R59 connection LCDBG pin, the emitter ground connection of the tenth NPN type triode V10；13rd pin SCK of interface with it is micro- 28th pin of processor connects, and the 14th pin MOS1 of interface and the 27th pin of microprocessor connect, and connects The second pin SSEL of mouth and the 30th pin of microprocessor connect, and the 15th pin of interface connects the 19th capacitor C19 One end, the other end of the 19th capacitor is connected with one end of the 16th pin of interface, the 23rd capacitor C23, second The other end of 13 capacitor C23 is connected with the 18th pin of the 17th pin of interface, interface, the 19th pin of interface Connect one end of the 20th capacitor C20, one end of the other end of the 20th capacitor C20 and the 18th capacitor C18, interface second Ten pins are connected, the 21st pin of the other end connecting interface of the 18th capacitor C18, the 22nd pin of interface The both ends of the 22nd capacitor C22, the 26th pin connection second of interface are separately connected with the 23rd pin of interface One end of 11 capacitor C21, the other end ground connection of the 21st capacitor C21, the 17th electricity of the 27th pin connection of interface Hold one end of C17, the other end ground connection of the 17th capacitor C17, the 28th pin of interface connects the one of the 16th capacitor C16 End, the other end ground connection of the 16th capacitor C16, one end of the 15th capacitor C15 of the 29th pin connection of interface, the 15th The other end of capacitor C15 is grounded, and the 30th pin of interface connects one end of the 14th capacitor C14, and the 14th capacitor C14's is another One end ground connection.

Preferably, communication unit includes back code circuit and decoding circuit；Return code circuit include the second NPN type triode V2 and 30th resistance R30, wherein the collector of the second NPN type triode V2 connects BUS, the emitter of the second NPN type triode V2 One end of the 29th resistance R29 is connected, the base stage of the second NPN type triode V2 passes through the 30th resistance R30 connection micro process Device, the other end ground connection of the 29th resistance R29；Decoding circuit include the second PNP type triode P2, the 31st resistance R31, 32nd resistance R32, the 33rd resistance R33, the tenth capacitor C10 and the 11st capacitor C11, wherein the second positive-negative-positive three The collector of pole pipe P2 is connected with one end of the 31st resistance R31, microprocessor, the base stage of the second PNP type triode P2 It is connected with one end of the 32nd resistance R32, one end of the 33rd resistance R33, one end of the tenth capacitor C10, the 2nd PNP The emitter of type triode P2, the other end of the 32nd resistance R32 are connected with positive pole respectively, the 33rd resistance The other end of R33 is connected with one end of the 11st capacitor C11, and the other end of the 11st capacitor C11 is connected with BUS, third The other end of 11 resistance R31 is grounded, the other end ground connection of the tenth capacitor C10.

Preferably, sound driver unit include the 35th resistance R35, the 4th NPN type triode V4, triangle inductance L3, 6th diode VD6, the 13rd capacitor C13 and buzzer；One end connection microprocessor of 35th resistance R35, the 30th The other end of five resistance R35 connects the base stage of the 4th NPN type triode V4, and the emitter of the 4th NPN type triode V4 is grounded, The collector of 4th NPN type triode V4 is connected with the second pin of the third pin of triangle inductance L3, buzzer, triangle electricity Feel the first pin of the first pin connection buzzer of L3, the second pin of triangle inductance L3 connects the yin of the 6th diode VD6 Pole, the anode of the 6th diode VD6, one end of the 13rd capacitor C13 are separately connected positive pole, and the 13rd capacitor C13's is another One end ground connection.

Preferably, key and lamp control unit include first switch S1, second switch S2, third switch S3, the 4th switch S4, the 5th switch S5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the 34th capacitor C34, 20 resistance R20, the 21st resistance R21, the 26th resistance R26, the 70th resistance R70, the first indicator light LED1, second Indicator light LED2, third indicator light LED3 and the 4th indicator light LED4；The cathode of first indicator light LED1 is grounded, the first indicator light The anode of LED1 is grounded by the 20th resistance R20 connection microprocessor, the cathode of the second indicator light LED2, the second indicator light The anode of LED2 is grounded by the 21st resistance R21 connection microprocessor, the cathode of third indicator light LED3, third instruction The anode of lamp LED3 is grounded by the 26th resistance R26 connection microprocessor, the cathode of the 4th indicator light LED4, the 4th instruction The anode of lamp LED4 passes through the 70th resistance R70 connection microprocessor；First switch S1 is in parallel with the 6th capacitor C6, one end with Microprocessor connection, other end ground connection；Second switch S2 is in parallel with the 7th capacitor C7, and one end is connect with microprocessor, the other end Ground connection；Third switch S3 is in parallel with the 8th capacitor C8, and one end is connect with microprocessor, other end ground connection；4th switch S4 and Nine capacitor C9 are in parallel, and one end is connect with microprocessor, other end ground connection；5th switch S5 is in parallel with the 34th capacitor C34, and one End is connect with microprocessor, other end ground connection.

The utility model use two-wire system nonpolarity fire-fighting two lines bus, fire-fighting two lines bus can to product power but also into Row communication, it is low in energy consumption since using 2 line systems, wiring is simple, it facilitates site operation step and reduces and be constructed into This.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of two lines bus type fire display panel provided by the embodiment of the utility model；

Fig. 2 is a kind of circuit connection diagram of rectification filtering unit provided by the embodiment of the utility model；

Fig. 3 is a kind of circuit connection diagram of power supply unit provided by the embodiment of the utility model；

Fig. 4 is the circuit connection diagram of the backlight in a kind of display unit provided by the embodiment of the utility model；

Fig. 5 is the circuit connection diagram of the interface in a kind of display unit provided by the embodiment of the utility model；

Fig. 6 is the circuit connection diagram for returning code circuit in a kind of communication unit provided by the embodiment of the utility model；

Fig. 7 is the circuit connection diagram of the decoding circuit in a kind of communication unit provided by the embodiment of the utility model；

Fig. 8 is a kind of circuit connection diagram of sound driver unit provided by the embodiment of the utility model；

Fig. 9 is the circuit connection of key part in a kind of key provided by the embodiment of the utility model and lamp control unit Figure；

Figure 10 is that the circuit of the lamp control section of a kind of key provided by the embodiment of the utility model and lamp control unit connects Map interlinking；

Figure 11 is a kind of connection schematic diagram of microprocessor provided by the embodiment of the utility model.

Specific embodiment

With reference to the accompanying drawings and examples, the technical solution of the utility model is described in further detail.

Such as Fig. 1, the utility model provides a kind of two lines bus type fire display panel, including rectification filtering unit 101, power supply list Member 102, communication unit 106, display unit 103, microprocessor 107, key and lamp control unit 105 and sound driver list Member 104；The input terminal of rectification filtering unit 101 connects fire-fighting two lines bus, and the first end of rectification filtering unit 101 connects power supply, The second end connecting communication unit 102 of rectification filtering unit 101；Microprocessor 107 and communication unit 106, power supply unit 102, Display unit 103, sound driver unit 104 and key and lamp control unit 105.

In one example, such as Fig. 2, rectification filtering unit 101 includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, first diode VD1, the 7th diode VD7, third diode VD3, the 8th diode VD8, the four or two Pole pipe VD4, first capacitor C1, the second capacitor C2, the 5th capacitor C5 and the first electrolytic capacitor E1；One end of first resistor R1 with BUS1, first capacitor C1 one end be connected, the cathode of the anode of the other end of first resistor R1 and VD3, the 8th diode VD8 It is connected, the other end ground connection of first capacitor C1；One end of second resistance R2 is connected with one end of BUS2, the 5th capacitor C5, The other end of second resistance R2 is connected with the cathode of the anode of VD1, the 7th diode VD7, another termination of the 5th capacitor C5 Ground；The cathode of first diode VD1 and cathode, BUS, the anode of the 4th diode VD4,3rd resistor of third diode VD3 One end of R3 is connected, and the cathode of the 4th diode VD4 connects one end of the 4th resistance R4, the other end and electricity of the 4th resistance R4 Source anode, one end of the second capacitor C2, the first electrolytic capacitor E1 anode be connected, the other end of the second capacitor and first electrolysis The cathode of capacitor E1, the other end of 3rd resistor R3, the anode of the 7th diode VD7 and the 8th diode VD8 anode be connected It connects.

Power supply unit 102 and the output of rectification filtering unit 101 connect, through DCDC chip U1 and its peripheral cell, by power supply Voltage pressure stabilizing gives the power supply of the peripheral hardwares such as microprocessor 107, display unit 103 and sound driver unit 104 to 3.3V.

Such as Fig. 3, power supply unit 102 includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, DCDC Chip U1, third capacitor C3, the 4th capacitor C4, the first inductance L1 and the 5th electrolytic capacitor E5；The first pin of DCDC chip U1 BST, one end of third capacitor C3, the 5th pin VCC of DCDC chip U1, the 5th resistance R5 one end respectively with the first level Be connected, in the present embodiment, the first level be 24V, the other end of the 4th pin EN and the 5th resistance R5 of DCDC chip U1, One end of 6th resistance R6 is connected, one end of the third pin FB and the 7th resistance R7 of DCDC chip U1, the 8th resistance R8 One end is connected, and the 6th pin LX of DCDC chip U1 is connected with one end of the other end of third capacitor, the first inductance L1, the One end difference of the other end of one inductance L1, the other end of the 8th resistance R8, the anode of the 5th electrolytic capacitor E5, the 4th capacitor C4 It is connected with positive pole, the other end ground connection of the 6th resistance R6, the second pin GND ground connection of DCDC chip U1, the 7th resistance The other end of R7 is grounded, the cathode ground connection of the 5th electrolytic capacitor E5, the other end ground connection of the 4th capacitor C4.

Display unit 103 includes backlight and interface.

In one example, such as Fig. 4, the anode connection positive pole of the backlight in display unit 103, the cathode of backlight is logical Cross the collector that the 58th resistance connects the tenth NPN type triode V10, the base stage of the tenth NPN type triode V10 passes through the 59 resistance R59 connections are grounded with LCDBG pin, the emitter of the tenth NPN type triode V10.

Such as Fig. 5, the 13rd pin SCK of the interface in display unit 103 and the 28th pin of single-chip microcontroller are connected, interface The connection of 27th pin of the 14th pin MOS1 and single-chip microcontroller, the second pin SSEL of interface and the 30th pin of single-chip microcontroller connect It connects, the 15th pin of interface connects one end of the 19th capacitor C19, and the other end of the 19th capacitor and the 16th of interface are drawn Foot, the 23rd capacitor C23 one end be connected, the other end of the 23rd capacitor C23 and the 17th pin, the interface of interface The 18th pin be connected, the 19th pin of interface connects one end of the 20th capacitor C20, and the 20th capacitor C20's is another One end is connected with the 20th pin of one end of the 18th capacitor C18, interface, and the other end of the 18th capacitor C18 connects 21st pin of mouth, the 22nd pin of interface and the 23rd pin of interface are separately connected the 22nd capacitor The both ends of C22, the 26th pin of interface connect one end of the 21st capacitor C21, the other end of the 21st capacitor C21 Ground connection, the 27th pin of interface connect one end of the 17th capacitor C17, the other end ground connection of the 17th capacitor C17, interface The 28th pin connect the 16th capacitor C16 one end, the 16th capacitor C16 the other end ground connection, the 20th of interface the Nine pins connect one end of the 15th capacitor C15, the other end ground connection of the 15th capacitor C15, the 30th pin connection of interface One end of 14th capacitor C14, the other end ground connection of the 14th capacitor C14.

Display unit 103 is made of backlight LCD 2A and interface LCD2B, is powered by power supply unit 102, and microprocessor 107 is controlled System.When receiving fire alarm information, microprocessor 107 sets high LCDBG pin, lights backlight LCD 2A.It will need simultaneously to be shown Fire alarm information, which exports, gives LCD2B interface, is shown on 128*64 lattice lcd screen.

Communication unit 106 is connect with the BUS point in rectification filtering unit, and decoding circuit passes through exchange way sample bus Waveform, and converted signals waveform (INT_P_1) is passed into microprocessor 107 and is decoded；When needing upload information, The corresponding position of the lock-out pulse of bus, microprocessor 107 will return code circuit OUT_P_1 and set height, promote bus current, electric current Upload information is uploaded to fire-fighting controller by mode in a digital manner, is realized reception with this and is confirmed the function of fire alarm information.

Such as Fig. 6 and Fig. 7, communication unit 106 includes back code circuit and decoding circuit, and specific connection is as follows:

Returning code circuit includes the second NPN type triode V2 and the 30th resistance R30, wherein the 2nd NPN type triode V2 Collector connect BUS, the emitter of the second NPN type triode V2 connects one end of the 29th resistance R29, the second NPN type The base stage of triode V2 passes through the 13rd pin OUT_P_1, the 29th resistance R29 of the 30th resistance R30 connection microprocessor The other end ground connection；

Decoding circuit includes the second PNP type triode P2, the 31st resistance R31, the 32nd resistance R32, the 30th Three resistance R33, the tenth capacitor C10 and the 11st capacitor C11, wherein the collector and the 30th of the 2nd PNP type triode P2 One end of one resistance R31, the 12nd pin INT_P_1 of microprocessor are connected, the base stage of the second PNP type triode P2 with One end, one end of the 33rd resistance R33, one end of the tenth capacitor C10 of 32nd resistance R32 is connected, the second positive-negative-positive The emitter of triode P2 is connected with the other end, the power supply unit of the 32nd resistance R32, the 33rd resistance R33's The other end is connected with one end of the 11st capacitor C11, and the other end of the 11st capacitor C11 is connected with BUS, and the 31st The other end of resistance R31 is grounded, the other end ground connection of the tenth capacitor C10.

Such as Fig. 8, sound driver unit 104 includes the 35th resistance R35, the 4th NPN type triode V4, triangle inductance L3, the 6th diode VD6, the 13rd capacitor C13 and buzzer, wherein one end of the 35th resistance R35 connects microprocessor The 18th pin PWM, the other end of the 35th resistance R35 connects the base stage of the 4th NPN type triode V4, the 4th NPN type The emitter of triode V4 is grounded, the third pin of the collector of the 4th NPN type triode V4 and triangle inductance L3, buzzer Second pin is connected, the first pin of the first pin connection buzzer of triangle inductance L3, the second pin of triangle inductance L3 Connect the cathode of the 6th diode VD6, the anode of the 6th diode VD6, the 13rd capacitor C13 one end respectively with power supply just Pole connection, the other end ground connection of the 13rd capacitor C13.

Sound driver unit 104 is powered by power supply unit 102, and when receiving new fire alarm information, microprocessor 107 is exported Pwm signal, and by output after the 4th NPN type triode V4 and three foot inductance L3 amplification to buzzer, by adjusting output frequency Rate and duty ratio realize the output function of super low-power consumption fire alarm sound.

Such as Fig. 9 and Figure 10, key and lamp control unit 105 include first switch S1, second switch S2, third switch S3, 4th switch S4, the 5th switch S5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the 34th electricity Hold C34, the 20th resistance R20, the 21st resistance R21, the 26th resistance R26, the 70th resistance R70, the first indicator light LED1, the second indicator light LED2, third indicator light LED3 and the 4th indicator light LED4.

The cathode of first indicator light LED1 is grounded, and the anode of the first indicator light LED1 is micro- by the 20th resistance R20 connection 32nd pin of processor, the cathode ground connection of the second indicator light LED2, the anode of the second indicator light LED2 pass through the 20th 31st pin of one resistance R21 connection microprocessor, the cathode ground connection of third indicator light LED3, third indicator light LED3 Anode by the 26th pin of the 26th resistance R26 connection microprocessor, the cathode of the 4th indicator light LED4 is grounded, The anode of 4th indicator light LED4 passes through the 23rd pin of the 70th resistance R70 connection microprocessor.Wherein, first refers to Show that lamp LED1 represents power supply, the second indicator light LED2 fire alarm instruction, third indicator light LED3 noise reduction, the 4th indicator light LED4 representative Inspection function.

The I/O mouth state of 107 interrupt mode of microprocessor sampling touch key switch is simultaneously handled, and realizes setting/confirmation (S1), self-test/noise reduction (S2), turn over (S3), under turn over (S4) and first alert display (S5) keypress function；Microprocessor is according to product State, the pin realization for controlling each indicator light lights or extinguishes indicator light, realization power supply instruction function, fire alarm indicated work Energy, noise reduction instruction function, inspection indicate function.

Key part includes first switch S1, second switch S2, third switch S3, the 4th switch S4, the 5th switch S5, Six capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the 34th capacitor C34, wherein switch S1-S5 is Key switch, first switch S1 is in parallel with the 6th capacitor C6, and one end is connected with the 17th pin of microprocessor, another termination Ground；Second switch S2 is in parallel with the 7th capacitor C7, and one end is connected with the 15th pin of microprocessor, other end ground connection；Third Switch S3 is in parallel with the 8th capacitor C8, and one end is connected with the 11st pin of microprocessor, other end ground connection；4th switch S4 In parallel with the 9th capacitor C9, one end is connected with the 16th pin of microprocessor, other end ground connection；5th switch S5 and the 30th Four capacitor C34 are in parallel, and one end is connected with the 14th pin of microprocessor, other end ground connection.

Microprocessor 107 in above-described embodiment selects LPC824.

It is as shown in figure 11 with the connection relationship of microprocessor in above-described embodiment.

By the circuit element parameter and program of reasonably optimizing product, the power consumption of product is reduced to greatest extent, makes product function Consumption reaches bus monitoring electric current≤2mA, bus alarm current≤5mA, meets the demand to carrying capacity, realizes product two-wire system Target.

Above specific embodiment has carried out further the purpose of this utility model, technical scheme and beneficial effects It is described in detail, it should be understood that the above is only the specific embodiments of the utility model, is not used to limit originally practical Novel protection scope, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It should be included within the scope of protection of this utility model.

Claims (7)

1. a kind of two lines bus type fire display panel, which is characterized in that including rectification filtering unit, power supply unit, communication unit, show Show unit, microprocessor, key and lamp control unit and sound driver unit；

The input terminal of the rectification filtering unit connects fire-fighting two lines bus, and the first end of the rectification filtering unit connects the electricity The second end in source, the rectification filtering unit connects the communication unit；

The microprocessor and the communication unit, the power supply unit, the display unit, the sound driver unit, with And the key and lamp control unit.

2. two lines bus type fire display panel according to claim 1, which is characterized in that the rectification filtering unit includes the One resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, first diode VD1, the 7th diode VD7, the three or two Pole pipe VD3, the 8th diode VD8, the 4th diode VD4, first capacitor C1, the second capacitor C2, the electricity of the 5th capacitor C5 and first Solve capacitor E1；

One end of the first resistor R1 is connected with one end of BUS1, first capacitor C1, the other end of the first resistor R1 It is connected with the cathode of the anode of the VD3, the 8th diode VD8, the other end ground connection of the first capacitor C1；

One end of the second resistance R2 is connected with one end of BUS2, the 5th capacitor C5, and the second resistance R2's is another One end is connected with the cathode of the anode of the VD1, the 7th diode VD7, the other end ground connection of the 5th capacitor C5；

The cathode of the cathode of the first diode VD1 and the third diode VD3, BUS, the 4th diode VD4 Anode, 3rd resistor R3 one end be connected, the cathode of the 4th diode VD4 connects one end of the 4th resistance R4, The other end of the 4th resistance R4, one end of the second capacitor C2, the first electrolytic capacitor E1 anode respectively with the One level is connected, the cathode of the other end of second capacitor and the first electrolytic capacitor E1, the 3rd resistor R3 The other end, the 7th diode VD7 anode be connected with the anode of the 8th diode VD8.

3. two lines bus type fire display panel according to claim 1, which is characterized in that the power supply unit includes the 5th electricity Hinder R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, DCDC chip U1, third capacitor C3, the 4th capacitor C4, the first electricity Feel L1 and the 5th electrolytic capacitor E5；

The first pin BST of the DCDC chip U1, one end of the third capacitor C3, the DCDC chip U1 the 5th pin VCC, the 5th resistance R5 one end be connected respectively with the first level, the 4th pin EN of the DCDC chip U1 with it is described The other end of 5th resistance R5, the 6th resistance R6 one end be connected, the third pin FB of the DCDC chip U1 and institute One end of one end, the 8th resistance R8 for stating the 7th resistance R7 is connected, the 6th pin LX of the DCDC chip U1 and institute One end of the other end, the first inductance L1 of stating third capacitor is connected, the other end of the first inductance L1, the described 8th The other end of resistance R8, the 5th electrolytic capacitor E5 positive, described 4th capacitor C4 one end respectively with positive pole phase Connection, the other end ground connection of the 6th resistance R6, the second pin GND ground connection of the DCDC chip U1, the 7th resistance The other end of R7 is grounded, the cathode ground connection of the 5th electrolytic capacitor E5, the other end ground connection of the 4th capacitor C4.

4. two lines bus type fire display panel according to claim 1, which is characterized in that the display unit include backlight and Interface；

The anode connection positive pole of the backlight, the cathode of the backlight connect the tenth NPN type three by the 58th resistance The base stage of the collector of pole pipe V10, the tenth NPN type triode V10 passes through the 59th resistance R59 connection LCDBG pin, The emitter of tenth NPN type triode V10 is grounded；

13rd pin SCK of the interface and the 28th pin of microprocessor connect, the 14th pin of the interface The connection of 27th pin of MOS1 and microprocessor, the second pin SSEL of the interface and the 30th pin of microprocessor Connection, the 15th pin of the interface connect one end of the 19th capacitor C19, the other end of the 19th capacitor and the interface The 16th pin, the 23rd capacitor C23 one end be connected, the other end of the 23rd capacitor C23 connects with described 17th pin of mouth, the 18th pin of the interface are connected, and the 19th pin of the interface connects the 20th capacitor The other end of one end of C20, the 20th capacitor C20 is connected with the 20th pin of one end of the 18th capacitor C18, the interface It connects, the other end of the 18th capacitor C18 connects the 21st pin of the interface, the 22nd pin of the interface The both ends of the 22nd capacitor C22, the 26th pin of the interface are separately connected with the 23rd pin of the interface Connect one end of the 21st capacitor C21, the other end ground connection of the 21st capacitor C21, the 27th pin of the interface Connect one end of the 17th capacitor C17, the other end ground connection of the 17th capacitor C17, the 28th pin connection of the interface One end of 16th capacitor C16, the other end ground connection of the 16th capacitor C16, the 29th pin connection the tenth of the interface One end of five capacitor C15, the other end ground connection of the 15th capacitor C15, the 30th pin of the interface connect the 14th capacitor One end of C14, the other end ground connection of the 14th capacitor C14.

5. two lines bus type fire display panel according to claim 1, which is characterized in that the communication unit includes back code electricity Road and decoding circuit；

Described time code circuit includes the second NPN type triode V2 and the 30th resistance R30, wherein second NPN type triode The collector of V2 connects BUS, and the emitter of the second NPN type triode V2 connects one end of the 29th resistance R29, described For the base stage of second NPN type triode V2 by the 30th resistance R30 connection microprocessor, the 29th resistance R29's is another One end ground connection；

The decoding circuit includes the second PNP type triode P2, the 31st resistance R31, the 32nd resistance R32, the 30th Three resistance R33, the tenth capacitor C10 and the 11st capacitor C11, wherein the collector of the second PNP type triode P2 with it is described One end of 31st resistance R31, microprocessor are connected, the base stage and the described 30th of the second PNP type triode P2 One end of two resistance R32, one end of the 33rd resistance R33, the tenth capacitor C10 one end be connected, described The emitter of two PNP type triode P2, the 32nd resistance R32 the other end be connected respectively with positive pole, it is described The other end of 33rd resistance R33 is connected with one end of the 11st capacitor C11, and the 11st capacitor C11's is another One end is connected with the BUS, the other end ground connection of the 31st resistance R31, another termination of the tenth capacitor C10 Ground.

6. two lines bus type fire display panel according to claim 1, which is characterized in that the sound driver unit includes the 35 resistance R35, the 4th NPN type triode V4, triangle inductance L3, the 6th diode VD6, the 13rd capacitor C13 and buzzing Device；

One end of the 35th resistance R35 connects the microprocessor, the other end connection of the 35th resistance R35 The base stage of the 4th NPN type triode V4, the emitter ground connection of the 4th NPN type triode V4, the 4th NPN type three The collector of pole pipe V4 is connected with the second pin of the third pin of the triangle inductance L3, the buzzer, the triangle The first pin of inductance L3 connects the first pin of the buzzer, the second pin connection the described 6th of the triangle inductance L3 The cathode of diode VD6, the anode of the 6th diode VD6, one end of the 13rd capacitor C13 are being separately connected power supply just Pole, the other end ground connection of the 13rd capacitor C13.

7. two lines bus type fire display panel according to claim 1, which is characterized in that the key and lamp control unit packet Include first switch S1, second switch S2, third switch S3, the 4th switch S4, the 5th switch S5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the 34th capacitor C34, the 20th resistance R20, the 21st resistance R21, the 20th Six resistance R26, the 70th resistance R70, the first indicator light LED1, the second indicator light LED2, third indicator light LED3 and the 4th refer to Show lamp LED4；

The cathode of the first indicator light LED1 is grounded, and the anode of the first indicator light LED1 passes through the 20th resistance The R20 connection microprocessor, the cathode ground connection of the second indicator light LED2, the anode of the second indicator light LED2 pass through The 21st resistance R21 connection microprocessor, the cathode ground connection of the third indicator light LED3, the third instruction The anode of lamp LED3 passes through the 26th resistance R26 connection microprocessor, the cathode of the 4th indicator light LED4 The anode of ground connection, the 4th indicator light LED4 passes through the 70th resistance R70 connection microprocessor；

The first switch S1 is in parallel with the 6th capacitor C6, and one end is connect with microprocessor, other end ground connection；

The second switch S2 is in parallel with the 7th capacitor C7, and one end is connect with microprocessor, other end ground connection；

The third switch S3 is in parallel with the 8th capacitor C8, and one end is connect with microprocessor, other end ground connection；

The 4th switch S4 is in parallel with the 9th capacitor C9, and one end is connect with microprocessor, other end ground connection；

The 5th switch S5 is in parallel with the 34th capacitor C34, and one end is connect with microprocessor, other end ground connection.