Transmitter linkage auxiliary control circuit

Abstract

The utility model discloses a transmitter linkage auxiliary control circuit. The transmitter linkage auxiliary control circuit comprises a CPU unit, and an Ethernet unit, a serial port debugging unit, an analog input unit and a lamp key unit which are connected with the CPU unit. The CPU unit is connected with the digital input unit and the digital output unit through the IO expansion unit, and the digital input unit and the digital output unit are connected to an external main transmitter and an external standby transmitter; the CPU unit is connected with the RS485 unit and the RS232 unit through the serial port expansion unit, and the RS485 unit and the RS232 unit are connected to an external main transmitter coaxial control box, an external standby transmitter coaxial control box and an external dummy load; the RS485 unit is also connected to the IO expansion unit; the power supply unit supplies power to other power supplies. According to the scheme, one-key switching of the main and standby transmitters can be realized, and the operation complexity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of broadcast station, especially to a transmitter linkage auxiliary control circuit. BACKGROUND

[0002] The broadcast station transmitter is equipped with two transmitter links of main and backup because of all-weather work and the requirement of ensuring broadcast in abnormal time.

[0003] In the conventional application scene, the transmitter and the switching switch have corresponding control switches, and when operation is to be performed, manual judgment is relied on, and the required actions are sequentially executed manually according to the logical requirement sequence, which is complicated, prone to errors, and not timely enough. SUMMARY

[0004] The utility model mainly solves the technical problem of manual operation complexity and error-prone in the prior art and provides a transmitter linkage auxiliary control circuit capable of realizing automatic execution of a switching process.

[0005] The utility model mainly solves the above technical problem through the following technical scheme: a transmitter linkage auxiliary control circuit, comprising a CPU unit, an Ethernet unit, a serial port debugging unit, an analog input unit, an IO expansion unit, a serial port expansion unit, a digital input unit, a digital output unit, an RS485 unit, an RS232 unit, a lamp key unit and a power supply unit; the Ethernet unit, the serial port debugging unit, the analog input unit and the lamp key unit are connected with the CPU unit, the CPU unit connects the digital input unit and the digital output unit through the IO expansion unit, and the digital input unit and the digital output unit are connected to external main and backup transmitters; the CPU unit connects the RS485 unit and the RS232 unit through the serial port expansion unit, and the RS485 unit and the RS232 unit are connected to external main transmitter coaxial control boxes, backup transmitter coaxial control boxes and dummy loads; the RS485 unit is also connected to the IO expansion unit; and the power supply unit supplies power to other power supplies.

[0006] The scheme connects the main and backup transmitters through the digital input unit and the digital output unit, connects the switching switch, the dummy load and other devices through the serial port or the network port, the CPU unit quickly performs the required switching of the transmitter and the device according to the set logical relationship, realizes linkage of the associated devices, eliminates the tediousness of one-by-one operation, reduces the error rate and improves the switching speed.

[0007] As preferred, the CPU unit comprises a processor, and the processor is MT7620A, the Ethernet unit comprises a chip U101, and the chip U101 is HY601742, the 1st pin, the 3rd pin, the 6th pin and the 8th pin of the chip U101 are connected with the 33rd pin, the 32nd pin, the 31st pin and the 30th pin of the processor respectively, the 9th pin, the 11th pin, the 14th pin and the 16th pin of the chip U101 are connected with the 1st pin, the 2nd pin, the 3rd pin and the 6th pin of the RJ45 socket respectively, and the processor is further connected with an SD card seat and a clock chip SD2404FLPI.

[0008] The CPU completes the overall control of the device. The Ethernet unit is used for connecting other devices or a host computer, and can receive and send control instructions and state instructions. The circuit can also run independently from the control network or automatically perform switching according to a timing plan.

[0009] As preferred, the serial port debugging unit comprises a chip U160, and the chip U160 is SP3232, the 9th pin, the 10th pin, the 11th pin and the 12th pin of the chip U160 are connected with the 15th pin, the 14th pin, the 23rd pin and the 24th pin of the processor respectively, the 14th pin, the 13th pin, the 7th pin and the 8th pin of the chip U160 are connected with the 3rd pin, the 5th pin, the 2nd pin and the 4th pin of an interface P160 respectively, and the interface P160 is a DB9 interface.

[0010] The serial port debugging unit is used for completing the connection communication of the host computer or debugging the device.

[0011] As preferred, the analog input unit comprises a chip U200, and the chip U200 is an ADC acquisition chip TLV1548, the 1st pin, the 2nd pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin of the chip U200 are connected with an analog voltage interface, the 15th pin, the 16th pin, the 17th pin and the 18th pin of the chip U200 are connected with the 63rd pin, the 62nd pin, the 61st pin and the 60th pin of the chip U100 through an isolation chip respectively, and the isolation chip is 6N137M.

[0012] The TLV1548 has 10-bit 8-channel ADC conversion capability, so that the device has the acquisition capability of analog voltage such as a temperature and humidity sensor.

[0013] As preferred, the IO expansion unit comprises a chip U850, the chip U850 is CH423, the 9th pin and the 10th pin of the chip U850 are connected to the 106th pin and the 93th pin of the chip U100 through a resistor respectively; the digital input unit comprises 8 optical coupling chips, the optical coupling chip is TLP521, the 1st pin of the optical coupling chip is connected to the power supply VCC through a resistor, the 2nd pin of the optical coupling chip is connected to the digital switch quantity input interface, the 3rd pin of the optical coupling chip is grounded, the 23th pin, the 24th pin, the 26th pin, the 27th pin, the 28th pin, the 1st pin, the 2nd pin and the 3rd pin of the chip U850 are connected to the 4th pin of one optical coupling chip respectively; the digital output unit comprises 8 relays, the relay is FTR-B4GA4.5Z-B05, the 1st pin of the relay is connected to the power supply +5V, the 3rd pin of the relay is connected to the 6th pin of the relay itself, the 4th pin of the relay is connected to the 5th pin of the relay itself, the 6th pin and the 5th pin of the relay are connected to the digital switch quantity output interface, the 7th pin, the 6th pin, the 5th pin, the 4th pin, the 14th pin, the 13th pin, the 12th pin and the 8th pin of the chip U850 are connected to the base of one triode respectively, the emitter of the triode is grounded, the collector of the triode is connected to the 8th pin of one relay respectively.

[0014] The digital input unit is a collection circuit using optical coupling isolation, which can be connected to the GPIO interface of the docking equipment such as the transmitter, and the switch state of the equipment such as the on-off of the equipment can be obtained. The digital output unit is a relay output circuit, which is connected to the GPIO interface of the docking equipment such as the transmitter, and the state control of the switch quantity such as the on-off of the equipment can be realized.

[0015] As preferred, the serial port expansion unit comprises chip U700 and chip U720, both of which are WK2124, the 2nd pin, 3rd pin, 4th pin and 5th pin of chip U700 are connected to the 67th pin, 66th pin, 65th pin and 64th pin of chip U100 respectively, the 2nd pin, 3rd pin, 4th pin and 5th pin of chip U720 are connected to the 68th pin, 66th pin, 65th pin and 64th pin of chip U100 respectively, the 14th pin, 15th pin, 16th pin and 17th pin of chip U700 and the 14th pin, 15th pin, 16th pin and 17th pin of chip U720 are connected to the RS485 unit and RS232 unit, the RS485 unit comprises 8 RS485 chips, the RS485 chip is SP3485EN, the 1st pin and 4th pin of the RS485 chip are connected to the serial port expansion unit, the 6th pin and 7th pin of the RS485 chip are connected to the external interface, the 17th pin, 18th pin, 19th pin, 20th pin, 21st pin and 22nd pin of chip U850 and the 69th pin and 111th pin of chip U100 are connected to the 2nd pin of one RS485 chip respectively, the 2nd pin of the RS485 chip is connected to the 3rd pin of itself, the RS232 unit comprises 4 RS232 chips, the RS232 chip is SP3232, the 10th pin, 11th pin, 9th pin and 12th pin of the RS232 chip are connected to the serial port expansion unit, the 7th pin, 8th pin, 13th pin and 14th pin of the RS232 chip are connected to the external interface.

[0016] The serial port expansion unit comprises two WK2124 serial port expansion chips, each chip realizes the expansion of 4 serial ports. At most, 8 RS232 or RS485 interfaces are realized for communication control. Through these communication interfaces, the coaxial control box of the broadcast transmitter system is connected to realize the real-time state acquisition of the coaxial switch, dummy load and other devices of the transmitter, and corresponding control is made according to the demand.

[0017] As preferred, the lamp key unit comprises chip U170 and chip U872; chip U170 is 74HC165, the 11th pin, 12th pin, 13th pin and 14th pin of chip U170 are connected to the 1st pin, 2nd pin, 3rd pin and 4th pin of dial switch SW170 respectively, dial switch SW170 is TE-04, the 5th pin, 6th pin, 7th pin and 8th pin of dial switch SW170 are grounded, the 1st pin, 2nd pin and 9th pin of chip U170 are connected to the 2nd pin, 3rd pin and 1st pin of dial switch SW170 through resistors respectively; the 1st pin, 2nd pin and 3rd pin of chip U170 are also connected to the 18th pin, 17th pin and 19th pin of chip U100; chip U872 is CH423S, the 9th pin and 10th pin of chip U872 are connected to the 113th pin and 109th pin of chip U100 respectively, the 4th pin, 5th pin, 6th pin, 7th pin, 8th pin, 12th pin, 13th pin, 14th pin and 15th pin of chip U872 are connected to LED lamps respectively, the 16th pin, 17th pin, 18th pin, 19th pin, 20th pin and 21st pin of chip U872 are connected to key switches through interface CN840.

[0018] The lamp key unit is used for collecting response of the panel element key KEY and controlling lighting of the LED indicating lamp.

[0019] The utility model discloses a beneficial effect is, can realize the integrated control of transmitter system's one key switching, reduce the complexity of operation, accelerate switching speed, avoid operating error. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a transmitter linkage auxiliary control circuit block diagram of the utility model;

[0021] Figure 2 And Figure 3 It is a CPU unit circuit diagram of the utility model;

[0022] Figure 4 It is an Ethernet unit circuit diagram of the utility model;

[0023] Figure 5 It is a serial port debugging unit circuit diagram of the utility model;

[0024] Figure 6 And Figure 7 It is an analog input unit circuit diagram of the utility model;

[0025] Figure 8 It is an IO extension unit circuit diagram of the utility model;

[0026] Figure 9 It is a digital input unit circuit diagram of the utility model;

[0027] Figure 10 It is a digital output unit circuit diagram of the utility model;

[0028] Figure 11 It is a serial port extension unit circuit diagram of the utility model;

[0029] Figure 12 It is an RS485 unit circuit diagram of the utility model;

[0030] Figure 13 It is an RS232 unit circuit diagram of the utility model;

[0031] Figure 14 It is a circuit diagram of the external interface of RS485 unit and RS232 unit of the utility model;

[0032] Figure 15 It is a lamp key unit circuit diagram of the utility model;

[0033] In the figure: 1, CPU unit; 2, Ethernet unit; 3, serial port debugging unit; 4, analog input unit; 5, IO expansion unit; 6, serial port expansion unit; 7, digital input unit; 8, digital output unit; 9, RS485 unit; 10, RS232 unit; 11, light key unit; 12, power supply unit. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model is further specifically explained below by examples and in combination with the drawings.

[0035] Embodiment: a transmitter linkage auxiliary control circuit of the embodiment comprises a CPU unit 1, an Ethernet unit 2, a serial port debugging unit 3, an analog input unit 4, an IO expansion unit 5, a serial port expansion unit 6, a digital input unit 7, a digital output unit 8, an RS485 unit 9, an RS232 unit 10, a light key unit 11 and a power supply unit 12; the Ethernet unit, the serial port debugging unit, the analog input unit and the light key unit are all connected with the CPU unit, the CPU unit connects the digital input unit and the digital output unit through the IO expansion unit, and the digital input unit and the digital output unit are connected to the external main transmitter and standby transmitter; the CPU unit connects the RS485 unit and the RS232 unit through the serial port expansion unit, and the RS485 unit and the RS232 unit are connected to the external main transmitter coaxial control box, standby transmitter coaxial control box and dummy load; the RS485 unit is also connected to the IO expansion unit; the power supply unit supplies power for other power supplies. The power supply unit comprises a main power supply and a standby power supply, and also realizes double-path guarantee of stable power supply.

[0036] The scheme connects the main and standby transmitters through the digital input unit and the digital output unit, connects the switching switch, dummy load and other devices through the serial port or network port, and the CPU unit quickly switches the transmitters and devices according to the set logical relationship, realizes linkage of associated devices, eliminates the tediousness of one-by-one operation, reduces the error rate and improves the switching speed.

[0037] As shown in Figure 2 and Figure 3 , the CPU unit comprises a processor, and the processor is MT7620A. As shown in Figure 4 , the Ethernet unit comprises a chip U101, the chip U101 is HY601742, the 1 pin, 3 pin, 6 pin and 8 pin of the chip U101 are connected with the 33 pin, 32 pin, 31 pin and 30 pin of the processor respectively, and the 9 pin, 11 pin, 14 pin and 16 pin of the chip U101 are connected with the 1 pin, 2 pin, 3 pin and 6 pin of the RJ45 socket; the processor is also connected with an SD card seat and a clock chip SD2404FLPI.

[0038] CPU completes the overall control of the device. The Ethernet unit is used to connect other devices or the host computer, and can receive and send control instructions and state instructions. The circuit can also operate independently from the control network or automatically perform switching according to a timing plan.

[0039] As shown in Figure 5 , the serial port debugging unit includes a chip U160, the chip U160 is an SP3232, the 9th pin, the 10th pin, the 11th pin and the 12th pin of the chip U160 are connected to the 15th pin, the 14th pin, the 23rd pin and the 24th pin of the processor respectively, the 14th pin, the 13th pin, the 7th pin and the 8th pin of the chip U160 are connected to the 3rd pin, the 5th pin, the 2nd pin and the 4th pin of an interface P160 respectively, and the interface P160 is a DB9 interface.

[0040] The serial port debugging unit is used to complete the connection communication of the host computer or to debug the device.

[0041] As shown in Figure 6 and Figure 7 , the analog input unit includes a chip U200, the chip U200 is an ADC acquisition chip TLV1548, the 1st pin, the 2nd pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin of the chip U200 are connected to an analog voltage interface, the 15th pin, the 16th pin, the 17th pin and the 18th pin of the chip U200 are connected to the 63rd pin, the 62nd pin, the 61st pin and the 60th pin of the chip U100 respectively through an isolation chip, and the isolation chip is a 6N137M.

[0042] The TLV1548 has a 10-bit 8-channel ADC conversion capability, so that the device has the acquisition capability of an analog voltage such as a temperature and humidity sensor.

[0043] As shown in Figure 8 , the IO expansion unit includes a chip U850, the chip U850 is a CH423, the 9th pin and the 10th pin of the chip U850 are connected to the 106th pin and the 93rd pin of the chip U100 through a resistor respectively; as shown in Figure 9 , the digital input unit includes eight optocoupler chips, the optocoupler chips are TLP521, the 1st pin of each of the optocoupler chips is connected to a power supply VCC through a resistor, the 2nd pin of each of the optocoupler chips is connected to a digital switch quantity input interface, the 3rd pin of each of the optocoupler chips is grounded, and the 23rd pin, the 24th pin, the 26th pin, the 27th pin, the 28th pin, the 1st pin, the 2nd pin and the 3rd pin of the chip U850 are connected to the 4th pin of one of the optocoupler chips respectively; as shown in Figure 10As shown in the figure, the digital output unit includes 8 relays, the relays are FTR-B4GA4.5Z-B05, the 1 pin of the relays are all connected to the power supply +5V, the 3 pin of the relays are all connected to the 6 pin of the relays, the 4 pin of the relays are all connected to the 5 pin of the relays, the 6 pin and the 5 pin of the relays are all connected to the digital switch output interface, the 7 pin, the 6 pin, the 5 pin, the 4 pin, the 14 pin, the 13 pin, the 12 pin and the 8 pin of the chip U850 are respectively connected to the base of a triode, the emitter of the triode are all grounded, the collector of the triode are respectively connected to the 8 pin of a relay.

[0044] The digital input unit is a collection circuit using optical coupling isolation, which can be used to connect the GPIO interface of the docking equipment such as the transmitter, and the switch state of the on-off of the equipment can be obtained. The digital output unit is a relay output circuit, which is connected to the GPIO interface of the docking equipment such as the transmitter, and the on-off state control of the equipment can be realized.

[0045] As shown in the figure, Figure 11 The serial port expansion unit includes chip U700 and chip U720, chip U700 and chip U720 are both WK2124, the 2 pin, the 3 pin, the 4 pin and the 5 pin of chip U700 are respectively connected to the 67 pin, the 66 pin, the 65 pin and the 64 pin of chip U100, the 2 pin, the 3 pin, the 4 pin and the 5 pin of chip U720 are respectively connected to the 68 pin, the 66 pin, the 65 pin and the 64 pin of chip U100, chip U700 and chip U720 are respectively connected to the 14 pin, the 15 pin, the 16 pin and the 17 pin of chip U850, and chip U720 is connected to the RS485 unit and the RS232 unit, as shown in the figure, Figure 12 and Figure 14 The RS485 unit includes 8 RS485 chips, the RS485 chips are SP3485EN, the 1 pin and the 4 pin of the RS485 chips are all connected to the serial port expansion unit, the 6 pin and the 7 pin of the RS485 chips are all connected to the external interface, the 17 pin, the 18 pin, the 19 pin, the 20 pin, the 21 pin and the 22 pin of chip U850 and the 69 pin and the 111 pin of chip U100 are respectively connected to the 2 pin of an RS485 chip, the 2 pin of the RS485 chips are all connected to the 3 pin of the RS485 chips; as shown in the figure, Figure 13 The RS232 unit includes 4 RS232 chips, the RS232 chips are SP3232, the 10 pin, the 11 pin, the 9 pin and the 12 pin of the RS232 chips are all connected to the serial port expansion unit, the 7 pin, the 8 pin, the 13 pin and the 14 pin of the RS232 chips are all connected to the external interface.

[0046] The serial port expansion unit includes two WK2124 serial port expansion chips, each chip implements expansion of four serial ports, and up to eight RS232 or RS485 interface communication controls.

[0047] As shown in Figure 15 The lamp key unit includes chip U170 and chip U872; chip U170 is 74HC165, the 11th pin, 12th pin, 13th pin and 14th pin of chip U170 are connected with the 1st pin, 2nd pin, 3rd pin and 4th pin of the DIP switch SW170 respectively, the DIP switch SW170 is TE-04, the 5th pin, 6th pin, 7th pin and 8th pin of the DIP switch SW170 are grounded, the 1st pin, 2nd pin and 9th pin of chip U170 are connected with the 2nd pin, 3rd pin and 1st pin of the DIP switch SW170 through resistors respectively; the 1st pin, 2nd pin and 3rd pin of chip U170 are also connected with the 18th pin, 17th pin and 19th pin of chip U100 respectively; chip U872 is CH423S, the 9th pin and 10th pin of chip U872 are connected with the 113th pin and 109th pin of chip U100 respectively, the 4th pin, 5th pin, 6th pin, 7th pin, 8th pin, 12th pin, 13th pin, 14th pin and 15th pin of chip U872 are connected with LEDs respectively, the 16th pin, 17th pin, 18th pin, 19th pin, 20th pin and 21st pin of chip U872 are connected with the key switch through the interface CN840. The lamp key module also includes a buzzer LS830 connected with chip U100. The buzzer is used to emit prompt sound.

[0048] The lamp key unit is used for acquisition response of the panel element key KEY and lighting control of the LED indicator lamp.

[0049] According to the above-mentioned state acquisition interface capability and control interface capability, the device can obtain the regular transmitter state of the broadcast transmitter system, the coaxial switch state of the transmitting antenna, and the software can realize one-key switching of the transmitter transmitting system according to the logical strategy, and can also issue a timing strategy to realize the timing on-off of the transmitter and the coaxial switching control action under the logical limit conditions required by the system.

[0050] The specific embodiments described in the present document are only illustrative of the spirit of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the principles of the present invention or exceed the scope defined by the appended claims.

[0051] Although the terms CPU unit, digital input unit, serial port expansion unit and the like are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A transmitter linkage auxiliary control circuit, characterized in that: It includes a CPU unit, an Ethernet unit, a serial port debugging unit, an analog input unit, an IO expansion unit, a serial port expansion unit, a digital input unit, a digital output unit, an RS485 unit, an RS232 unit, a light key unit and a power supply unit; the Ethernet unit, serial port debugging unit, analog input unit and light key unit are all connected to the CPU unit, the CPU unit is connected to the digital input unit and the digital output unit through the IO expansion unit, the digital input unit and the digital output unit are connected to an external main transmitter and a backup transmitter; the CPU unit is connected to the RS485 unit and the RS232 unit through the serial port expansion unit, the RS485 unit and the RS232 unit are connected to an external main transmitter coaxial control box, a backup transmitter coaxial control box and a dummy load; the RS485 unit is also connected to the IO expansion unit; the power supply unit supplies power to other power supplies.

2. The transmitter linkage auxiliary control circuit according to claim 1, characterized in that: The CPU unit includes a processor, which is MT7620A. The Ethernet unit includes a chip U101, which is HY601742. Pins 1, 3, 6 and 8 of chip U101 are respectively connected to pins 33, 32, 31 and 30 of the processor, and pins 9, 11, 14 and 16 of chip U101 are connected to pins 1, 2, 3 and 6 of the RJ45 socket; the processor is also connected to the SD card holder and the clock chip SD2404FLPI.

3. The transmitter linkage auxiliary control circuit according to claim 2, characterized in that: The serial port debugging unit includes chip U160, which is SP3232. Pins 9, 10, 11 and 12 of chip U160 are respectively connected to pins 15, 14, 23 and 24 of the processor. Pins 14, 13, 7 and 8 of chip U160 are respectively connected to pins 3, 5, 2 and 4 of interface P160. Interface P160 is a DB9 interface.

4. The transmitter linkage auxiliary control circuit according to claim 2, characterized in that: The analog input unit includes chip U200, which is an ADC acquisition chip TLV1548. Pins 1, 2, 3, 4, 5, 6, 7 and 8 of chip U200 are connected to the analog voltage interface, and pins 15, 16, 17 and 18 of chip U200 are respectively connected to pins 63, 62, 61 and 60 of chip U100 through an isolation chip. The isolation chip is 6N137M.

5. The transmitter linkage auxiliary control circuit according to claim 2, 3 or 4, characterized in that: The IO expansion unit includes a chip U850, which is a CH423 chip. Pins 9 and 10 of the chip U850 are connected to pins 106 and 93 of the chip U100 respectively through a resistor. The digital input unit includes 8 optocoupler chips, which are TLP521 chips. Pin 1 of the optocoupler chip is connected to the power supply VCC through a resistor, pin 2 of the optocoupler chip is connected to the digital switch input interface, and pin 3 of the optocoupler chip is grounded. Pins 23, 24, 26, 27, 28, 1, 2, and 3 of the chip U850 are each connected to pin 4 of an optocoupler chip. The digital output unit includes 8 relays, the relays are FTR-B4GA4.5Z-B05, pin 1 of the relay is connected to the power supply +5V, pin 3 of the relay is connected to its own pin 6, pin 4 of the relay is connected to its own pin 5, pin 6 and pin 5 of the relay are connected to the digital switch output interface, pin 7, pin 6, pin 5, pin 4, pin 14, pin 13, pin 12 and pin 8 of the chip U850 are respectively connected to the base of a transistor, the emitters of the transistors are all grounded, and the collectors of the transistors are respectively connected to pin 8 of a relay.

6. The transmitter linkage auxiliary control circuit according to claim 5, characterized in that: The serial port expansion unit includes a chip U700 and a chip U720, both of which are WK2124. Pins 2, 3, 4 and 5 of the chip U700 are connected to pins 67, 66, 65 and 64 of the chip U100 respectively. Pins 2, 3, 4 and 5 of the chip U720 are connected to pins 68, 66, 65 and 64 of the chip U100 respectively. The RS485 unit and the RS232 unit are connected to pins 14, 15, 16 and 17 of the chip U700 and pins 14, 15, 16 and 17 of the chip U720. The RS485 unit includes 8 RS485 chips, and the RS485 chip is SP34 85EN, pins 1 and 4 of the RS485 chip are connected to the serial port expansion unit, pins 6 and 7 of the RS485 chip are connected to the external interface, pins 17, 18, 19, 20, 21 and 22 of chip U850 and pins 69 and 111 of chip U100 are respectively connected to pin 2 of an RS485 chip, and pin 2 of the RS485 chip is connected to pin 3 of itself; the RS232 unit includes 4 RS232 chips, the RS232 chip is SP3232, pins 10, 11, 9 and 12 of the RS232 chip are connected to the serial port expansion unit, and pins 7, 8, 13 and 14 of the RS232 chip are connected to the external interface.

7. The transmitter linkage auxiliary control circuit according to claim 2, characterized in that: The light key unit includes a chip U170 and a chip U872; the chip U170 is a 74HC165, and the 11th, 12th, 13th, and 14th pins of the chip U170 are connected to the 1st, 2nd, 3rd, and 4th pins of the dip switch SW170 respectively. The dip switch SW170 is a TE-04, and the 5th, 6th, 7th, and 8th pins of the dip switch SW170 are all grounded. The 1st, 2nd, and 9th pins of the chip U170 are connected to the 2nd, 3rd, and 1st pins of the dip switch SW170 respectively through resistors; Pins 1, 2, and 3 of chip U170 are also connected to pins 18, 17, and 19 of chip U100; chip U872 is CH423S, and pins 9 and 10 of chip U872 are connected to pins 113 and 109 of chip U100 respectively. Pins 4, 5, 6, 7, 8, 12, 13, 14, and 15 of chip U872 are connected to LED lights respectively. Pins 16, 17, 18, 19, 20, and 21 of chip U872 are connected to the push button switch through interface CN840.

Images