CN203775255U - Mining information transmission interface - Google Patents
Mining information transmission interface Download PDFInfo
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- CN203775255U CN203775255U CN201420151325.5U CN201420151325U CN203775255U CN 203775255 U CN203775255 U CN 203775255U CN 201420151325 U CN201420151325 U CN 201420151325U CN 203775255 U CN203775255 U CN 203775255U
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Abstract
The utility model discloses a mining information transmission interface. The mining information transmission interface comprises a first RS232 interface circuit, a power interface module, a power transformation circuit, a first level converting circuit, a second level converting circuit, a third level converting circuit and a fourth level converting circuit. The output end of the first RS232 interface circuit is connected with the fourth level converting circuit successively through a first optical coupler isolation circuit, the first level converting circuit, a first interface converting chip, the second level converting circuit, a second optical coupler isolation circuit and the third level converting circuit. The third level converting circuit is also connected with the first RS232 interface circuit and a second interface converting chip. The second interface converting chip is also connected with a second RS232 interface circuit. The first interface converting chip is connected with an RS485 interface circuit through a lightning arrester. The mining information transmission interface can perform information transmission among non-intrinsic safe devices while performing mining information transmission, and improves the working efficiency.
Description
Technical field
The utility model relates to a kind of information transmission interface, especially relates to a kind of mining information coffret.
Background technology
The dangerous accident in colliery occurs repeatedly in recent years, safety of coal mines is very urgent, the key addressing this problem is that colliery generates field data and sends control centre to, facilitate the monitoring of control centre to Coal Mining Field, but the RS485 interface communication that most of production equipments of coal production adopt, this just makes troubles to data transfer procedure, thereby seeks information cheap, simple and reliable and that can realize photoelectric converting function and transmit interface and become the key addressing this problem.
RS-232 and RS-485 are serial data interface standards, RS-232 interface standard, as industrial standard, has guaranteed the compatibility between different manufacturers product, and its transmitting range maximum is about 15 meters, flank speed is 20kb/s, and point-to-point (only using a pair of transceiver) communication designs.So RS232 is only suitable for using in local communication.
RS-485 interface standard, increased multiple spot, two-way communications capabilities, allow a plurality of transmitters to be connected in same bus, driving force and the conflict protective feature of transmitter have been increased simultaneously, expanded bus common mode range, can adopt two wires and four line modes, two-wire system can realize real multiple spot two-way communication, require communication distance be tens meters on during km, extensively adopt RS-485 serial bus standard, RS-485 adopts balance to send and differential received simultaneously, therefore there is the ability that suppresses common mode disturbances, add that bus transceiver has high sensitivity, can detect the voltage that is low to moderate 200mV, therefore signal transmission can be restored beyond km, RS-485 adopts half-duplex operation, whenever can only have any in transmission state, and therefore, transtation mission circuit must be controlled by enable signal, very convenient during for multi-point interconnection, can save many holding wires.
Due to computer acquiescence only with RS232 interface, so the RS485 interface that need to be long-distance transmissions by RS232 interface conversion is transmitted the data message of computer, but general computer is only with a RS232 interface, so when the RS232 of computer interface and RS485 interface communicate, just can not communicate with the equipment of other RS232 interfaces simultaneously, incur loss through delay job schedule, reduced operating efficiency.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of mining information coffret is provided, it can be converted to RS232 interface signal RS485 interface signal, also can make information communicate between RS232 interface and other RS232 interfaces simultaneously, in the process of carrying out mine intrinsic safety communication, also can carry out the communication of non-intrinsic safety equipment room simultaneously, both realized the transmitting function to colliery scene data, also realize the needs of data transaction between different interface devices, greatly improved operating efficiency.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of mining information coffret, comprise a RS232 interface circuit, for connecting the power supply interface module and the power converting circuit being connected with described power supply interface module output of external power source, it is characterized in that: also comprise level shifting circuit, described level shifting circuit is by the first level shifting circuit, second electrical level change-over circuit, the 3rd level shifting circuit and the 4th level shifting circuit form, the output of a described RS232 interface circuit is connected to the first optical coupling isolation circuit, the output of described the first optical coupling isolation circuit is connected to the first level shifting circuit, the output of described the first level shifting circuit is connected to first interface conversion chip MAX487E, the output of described first interface conversion chip MAX487E is connected to second electrical level change-over circuit, the output of described second electrical level change-over circuit is connected to the second optical coupling isolation circuit, the output of described the second optical coupling isolation circuit is connected to the 3rd level shifting circuit, the output of described the 3rd level shifting circuit is connected to the 4th level shifting circuit, described the 3rd level shifting circuit also all joins with a RS232 interface circuit and the second interface conversion chip MAX487E, the output of described the second interface conversion chip MAX487E is connected to the 4th level shifting circuit, and described the second interface conversion chip MAX487E also joins with the 2nd RS232 interface circuit, described first interface conversion chip MAX487E and RS485 interface circuit join, and between described first interface conversion chip MAX487E and RS485 interface circuit, are also connected to lightning arrester.
Above-mentioned a kind of mining information coffret, is characterized in that: described the first optical coupling isolation circuit mainly consists of the first light-coupled isolation chip TLP521-1, and described the second optical coupling isolation circuit mainly consists of the second light-coupled isolation chip TLP521-1.
Above-mentioned a kind of mining information coffret, it is characterized in that: described the first level shifting circuit is by MC14584B not gate IC8A, MC14584B not gate IC8B, MC14584B not gate IC8C, MC14584B not gate IC8E and MC14584B not gate IC8F, and resistance R 15, resistance R 17 and light-emitting diode D3 form, the input of described MC14584B not gate IC8A and MC14584B not gate IC8C all joins by resistance R 17 and described power converting circuit VCC output, the input of the input of described MC14584B not gate IC8A and MC14584B not gate IC8C also joins with the pin 4 of described the first light-coupled isolation chip TLP521-1, the input of the input of the output of described MC14584B not gate IC8A and MC14584B not gate IC8B and MC14584B not gate IC8F all joins, the input of the output of described MC14584B not gate IC8F and described MC14584B not gate IC8E joins, the output of described MC14584B not gate IC8E and the anode of described light-emitting diode D3 join, the negative electrode of described light-emitting diode D3 is by resistance R 15 ground connection, the pin 4 of the output of described MC14584B not gate IC8B and described first interface conversion chip MAX487E joins, pin 2 and the pin 3 of the output of described MC14584B not gate IC8C and described first interface conversion chip MAX487E join.
Above-mentioned a kind of mining information coffret, it is characterized in that: described second electrical level change-over circuit is by MC14584B non-gate ic7 A, MC14584B non-gate ic7 B, MC14584B non-gate ic7 C and MC14584B non-gate ic7 D, and resistance R 14 and light-emitting diode D2 composition, the pin 1 of the input of described MC14584B non-gate ic7 B and described first interface conversion chip MAX487E joins, the input of the input of the output of described MC14584B non-gate ic7 B and MC14584B non-gate ic7 A and MC14584B non-gate ic7 C all joins, the pin 2 of the output of described MC14584B non-gate ic7 A and described the second light-coupled isolation chip TLP521-1 joins, the input of the output of described MC14584B non-gate ic7 C and described MC14584B non-gate ic7 D joins, the output of described MC14584B non-gate ic7 D and the anode of light-emitting diode D2 join, the negative electrode of described light-emitting diode D2 is by resistance R 14 ground connection.
Above-mentioned a kind of mining information coffret, it is characterized in that: described the 3rd level shifting circuit comprises CD4093 NAND gate IC4A, CD4093 NAND gate IC4B, CD4093 NAND gate IC4C and CD4093 NAND gate IC4D, two inputs of described CD4093 NAND gate IC4A all join with the pin 14 of a described RS232 interface circuit, two inputs of the output of described CD4093 NAND gate IC4A and CD4093 NAND gate IC4B, and the pin 2 of described the second interface conversion chip MAX487E and pin 3 join, the output of described CD4093 NAND gate IC4B and described the second interface conversion chip MAX487E(7) pin 4 join, an input of described CD4093 NAND gate IC4C and the pin 1 of described the second interface conversion chip MAX487E join, the pin 4 of another input of described CD4093 NAND gate IC4C and one end of resistance R 9 and the second light-coupled isolation chip TLP521-1 joins, the other end of described resistance R 9 and described power converting circuit+5V output joins, two inputs of the output of described CD4093 NAND gate IC4C and described CD4093 NAND gate IC4D join, and the output of described CD4093 NAND gate IC4D and the pin 8 of a described RS232 interface circuit join.
Above-mentioned a kind of mining information coffret, it is characterized in that: described the 4th level shifting circuit is by MC14584B not gate IC3A, MC14584B not gate IC3B, MC14584B not gate IC3D, MC14584B not gate IC3E and MC14584B not gate IC3F, and light-emitting diode D1, light-emitting diode D4, light-emitting diode D5, light-emitting diode D6, resistance R 5, resistance R 6, resistance R 8 and resistance R 19 form, the output of the input of described MC14584B not gate IC3A and described CD4093 NAND gate IC4A joins, the input of the output of described MC14584B not gate IC3A and MC14584B not gate IC3B joins, the output of described MC14584B not gate IC3B and the anode of light-emitting diode D6 join, the negative electrode of described light-emitting diode D6 is by resistance R 5 ground connection, the pin 1 of the input of described MC14584B not gate IC3D and described the second interface conversion chip MAX487E joins, the output of described MC14584B not gate IC3D and the anode of light-emitting diode D5 join, and the negative electrode of described light-emitting diode D5 is by resistance R 6 ground connection, the output of the input of described MC14584B not gate IC3E and described CD4093 NAND gate IC4D joins, the output of described MC14584B not gate IC3E and the anode of light-emitting diode D1 join, the negative electrode of described light-emitting diode D1 is by resistance R 19 ground connection, the output of the input of described MC14584B not gate IC3F and described CD4093 NAND gate IC4B joins, the output of described MC14584B not gate IC3F and the negative electrode of light-emitting diode D4 join, the anode of described light-emitting diode D4 by resistance R 8 and described power converting circuit+5V output joins.
Above-mentioned a kind of mining information coffret, it is characterized in that: described first interface conversion chip MAX487E is by IC9 chip MAX487E, polar capacitor C1, resistance R 10, resistance R 11 and resistance R 13 form, the equal ground connection in one end of the pin 5 of described IC9 chip MAX487E and resistance R 13, one end of one end of described resistance R 10 and resistance R 11 all joins with the pin 6 of described IC9 chip MAX487E, the other end of the other end of described resistance R 13 and resistance R 10 all joins with the pin 7 of described IC9 chip MAX487E, the other end of described resistance R 11, the pin 8 of the positive pole of polar capacitor C1 and IC9 chip MAX487E all with described power converting circuit+5V output joins, the minus earth of polar capacitor C1.
The utility model compared with prior art has the following advantages:
1, the utility model operating accuracy is high and working stability is reliable, easy to use, is with a wide range of applications.
2, the utility model can be converted to RS232 interface signal RS485 interface signal, also can make information communicate between RS232 interface and other RS232 interfaces, in the process of carrying out mine intrinsic safety communication, also can carry out the communication of non-intrinsic safety equipment room simultaneously, both realized the transmitting function to colliery scene data, also realize the needs of data transaction between different interface devices, greatly improved operating efficiency.
3, the utility model is usingd twisted-pair feeder as communication media, and under half duplex communication and low rate mode, signal is transmitted at a distance, and do not need repeater, low cost of manufacture, signal transmits accurately and reliably, is convenient to promote the use of.
In sum, the utility model can be converted to RS232 interface signal RS485 interface signal, also can make information communicate between RS232 interface and other RS232 interfaces, in the process of carrying out mine intrinsic safety communication, also can carry out the communication of non-intrinsic safety equipment room simultaneously, both realized the transmitting function to colliery scene data, also the needs of data transaction between different interface devices have been realized, greatly improved operating efficiency, and using twisted-pair feeder as communication media, under half duplex communication and low rate mode, signal is transmitted, be with a wide range of applications.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Description of reference numerals:
The 1-the one RS232 interface circuit; The 2-the first optical coupling isolation circuit; 3-level shifting circuit;
3-1-the first level shifting circuit; 3-2-second electrical level change-over circuit;
3-3-three level shifting circuit; 3-4-four level shifting circuit;
4-first interface conversion chip MAX487E; 5-lightning arrester;
6-RS485 interface circuit; The 7-the second interface conversion chip MAX487E;
The 8-the two RS232 interface circuit; 9-power supply interface module; 10-power converting circuit;
The 11-the second optical coupling isolation circuit.
Embodiment
As shown in Figure 1, the utility model comprises a RS232 interface circuit 1, for connecting that the power supply interface module 9 of external power source is connected with described power supply interface module 9 outputs and for outer power voltage being converted to the power converting circuit 10 of electronic component required voltage, it is characterized in that: also comprise level shifting circuit 3, described level shifting circuit 3 is by the first level shifting circuit 3-1, second electrical level change-over circuit 3-2, the 3rd level shifting circuit 3-3 and the 4th level shifting circuit 3-4 form, the output of a described RS232 interface circuit 1 is connected to the first optical coupling isolation circuit 2, the output of described the first optical coupling isolation circuit 2 is connected to the first level shifting circuit 3-1, the output of described the first level shifting circuit 3-1 is connected to first interface conversion chip MAX487E, the output of described first interface conversion chip MAX487E is connected to second electrical level change-over circuit 3-2, the output of described second electrical level change-over circuit 3-2 is connected to the second optical coupling isolation circuit 11, the output of described the second optical coupling isolation circuit 11 is connected to the 3rd level shifting circuit 3-3, the output of described the 3rd level shifting circuit 3-3 is connected to the 4th level shifting circuit 3-4, described the 3rd level shifting circuit 3-3 also all joins with a RS232 interface circuit 1 and the second interface conversion chip MAX487E, the output of described the second interface conversion chip MAX487E is connected to the 4th level shifting circuit 3-4, and described the second interface conversion chip MAX487E also joins with the 2nd RS232 interface circuit 8, described first interface conversion chip MAX487E also joins with RS485 interface circuit 6, between described first interface conversion chip MAX487E and RS485 interface circuit 6, is also connected to lightning arrester 5.
As depicted in figs. 1 and 2, in the present embodiment, described the first optical coupling isolation circuit (2) consists of the first light-coupled isolation chip TLP521-1, and described the second optical coupling isolation circuit (11) consists of the second light-coupled isolation chip TLP521-1.
As depicted in figs. 1 and 2, in the present embodiment, described the first level shifting circuit 3-1 is by MC14584B not gate IC8A, MC14584B not gate IC8B, MC14584B not gate IC8C, MC14584B not gate IC8E and MC14584B not gate IC8F, and resistance R 15, resistance R 17 and light-emitting diode D3 form, the input of described MC14584B not gate IC8A and MC14584B not gate IC8C all joins by resistance R 17 and described power converting circuit VCC output, the input of the input of described MC14584B not gate IC8A and MC14584B not gate IC8C also joins with the pin 4 of described the first light-coupled isolation chip TLP521-1, the input of the input of the output of described MC14584B not gate IC8A and MC14584B not gate IC8B and MC14584B not gate IC8F all joins, the input of the output of described MC14584B not gate IC8F and described MC14584B not gate IC8E joins, the output of described MC14584B not gate IC8E and the anode of described light-emitting diode D3 join, the negative electrode of described light-emitting diode D3 is by resistance R 15 ground connection, the pin 4 of the output of described MC14584B not gate IC8B and described first interface conversion chip MAX487E joins, pin 2 and the pin 3 of the output of described MC14584B not gate IC8C and described first interface conversion chip MAX487E join.
As depicted in figs. 1 and 2, in the present embodiment, described second electrical level change-over circuit 3-2 is by MC14584B non-gate ic7 A, MC14584B non-gate ic7 B, MC14584B non-gate ic7 C and MC14584B non-gate ic7 D, and resistance R 14 and light-emitting diode D2 composition, the pin 1 of the input of described MC14584B non-gate ic7 B and described first interface conversion chip MAX487E joins, the input of the input of the output of described MC14584B non-gate ic7 B and MC14584B non-gate ic7 A and MC14584B non-gate ic7 C all joins, the pin 2 of the output of described MC14584B non-gate ic7 A and described the second light-coupled isolation chip TLP521-1 joins, the input of the output of described MC14584B non-gate ic7 C and described MC14584B non-gate ic7 D joins, the output of described MC14584B non-gate ic7 D and the anode of light-emitting diode D2 join, the negative electrode of described light-emitting diode D2 is by resistance R 14 ground connection.
As depicted in figs. 1 and 2, in the present embodiment, described the 3rd level shifting circuit 3-3 comprises CD4093 NAND gate IC4A, CD4093 NAND gate IC4B, CD4093 NAND gate IC4C and CD4093 NAND gate IC4D, two inputs of described CD4093 NAND gate IC4A all join with the pin 14 of a described RS232 interface circuit 1, two inputs of the output of described CD4093 NAND gate IC4A and CD4093 NAND gate IC4B, and the pin 2 of described the second interface conversion chip MAX487E and pin 3 join, the pin 4 of the output of described CD4093 NAND gate IC4B and described the second interface conversion chip MAX487E joins, an input of described CD4093 NAND gate IC4C and the pin 1 of described the second interface conversion chip MAX487E join, the pin 4 of another input of described CD4093 NAND gate IC4C and one end of resistance R 9 and the second light-coupled isolation chip TLP521-1 joins, the other end of described resistance R 9 and described power converting circuit 10+5V output joins, two inputs of the output of described CD4093 NAND gate IC4C and described CD4093 NAND gate IC4D join, and the output of described CD4093 NAND gate IC4D and the pin 8 of a described RS232 interface circuit 1 join.
As depicted in figs. 1 and 2, in the present embodiment, described the 4th level shifting circuit 3-4 is by MC14584B not gate IC3A, MC14584B not gate IC3B, MC14584B not gate IC3D, MC14584B not gate IC3E and MC14584B not gate IC3F, and light-emitting diode D1, light-emitting diode D4, light-emitting diode D5, light-emitting diode D6, resistance R 5, resistance R 6, resistance R 8 and resistance R 19 form, the output of the input of described MC14584B not gate IC3A and described CD4093 NAND gate IC4A joins, the input of the output of described MC14584B not gate IC3A and MC14584B not gate IC3B joins, the output of described MC14584B not gate IC3B and the anode of light-emitting diode D6 join, the negative electrode of described light-emitting diode D6 is by resistance R 5 ground connection, the pin 1 of the input of described MC14584B not gate IC3D and described the second interface conversion chip MAX487E joins, the output of described MC14584B not gate IC3D and the anode of light-emitting diode D5 join, and the negative electrode of described light-emitting diode D5 is by resistance R 6 ground connection, the output of the input of described MC14584B not gate IC3E and described CD4093 NAND gate IC4D joins, the output of described MC14584B not gate IC3E and the anode of light-emitting diode D1 join, the negative electrode of described light-emitting diode D1 is by resistance R 19 ground connection, the output of the input of described MC14584B not gate IC3F and described CD4093 NAND gate IC4B joins, the output of described MC14584B not gate IC3F and the negative electrode of light-emitting diode D4 join, the anode of described light-emitting diode D4 by resistance R 8 and described power converting circuit 10+5V output joins.
As depicted in figs. 1 and 2, in the present embodiment, described first interface conversion chip MAX487E is by IC9 chip MAX487E, polar capacitor C1, resistance R 10, resistance R 11 and resistance R 13 form, the equal ground connection in one end of the pin 5 of described IC9 chip MAX487E and resistance R 13, one end of one end of described resistance R 10 and resistance R 11 all joins with the pin 6 of described IC9 chip MAX487E, the other end of the other end of described resistance R 13 and resistance R 10 all joins with the pin 7 of described IC9 chip MAX487E, the other end of described resistance R 11, the pin 8 of the positive pole of polar capacitor C1 and IC9 chip MAX487E all with described power converting circuit 10+5V output joins, the minus earth of polar capacitor C1.
Operation principle of the present utility model and the course of work are:
Signal sends the first level shifting circuit 3-1 to through installing after a RS232 interface circuit 1 on computers and the first optical coupling isolation circuit 2 isolation are amplified, the first level shifting circuit 3-1 sends the signal after conversion to first interface conversion chip MAX487E, when the first level shifting circuit 3-1 exports high level to first interface conversion chip MAX487E, first interface conversion chip MAX487E is in transmission state, this computer-chronograph can send data, the data that send are sent in first interface conversion chip MAX487E and send after the isolation amplification of the first optical coupling isolation circuit 2 and the level conversion of the first level shifting circuit 3-1, protection through lightning arrester 5 sends data under mine intrinsic safety equipment by RS485 interface circuit 6 again, realized the sending function to intrinsic safety equipment room data,
When the first level shifting circuit 3-1 output low level is during to first interface conversion chip MAX487E, first interface conversion chip MAX487E is in accepting state, now, the data that transmit from RS485 interface circuit 6 are sent to second electrical level change-over circuit 3-2 through protection and the first interface conversion chip MAX487E of lightning arrester 5, after isolating amplification, the data of 11 pairs of described second electrical level change-over circuit 3-2 conversions of the second optical coupling isolation circuit send the 3rd level shifting circuit 3-3 to again, by the 3rd level shifting circuit 3-3, by a RS232 interface circuit 1, send the data after conversion under mine intrinsic safety equipment again, realized the receiving function to intrinsic safety equipment room data,
Signal sends the second interface conversion chip MAX487E to after a RS232 interface circuit 1 on computers and the 3rd level shifting circuit 3-3 conversion output are installed, when the 3rd level shifting circuit 3-3 output high level is given the second interface conversion chip MAX487E, the second interface conversion chip MAX487E is in transmission state, this computer-chronograph can send data, the data that send are sent in the second interface conversion chip MAX487E and send after the 3rd level shifting circuit 3-3 carries out level conversion, data send non-intrinsic safety equipment to by described the 2nd RS232 interface circuit, realized the sending function to non-intrinsic safety equipment room data,
When the 3rd level shifting circuit 3-3 output low level is given the second interface conversion chip MAX487E, the second interface conversion chip MAX487E is in accepting state, now, the data that transmit from described the 2nd RS232 interface circuit 8 are sent to described the 3rd level shifting circuit 3-3 through described the second interface conversion chip MAX487E, by the 3rd level shifting circuit 3-3, by a described RS232 interface circuit 1, send the data after conversion to non-intrinsic safety equipment again, realized the receiving function to non-intrinsic safety equipment room data.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection range of technical solutions of the utility model.
Claims (7)
1. a mining information coffret, comprise a RS232 interface circuit (1), for connecting the power supply interface module (9) and the power converting circuit (10) being connected with described power supply interface module (9) output of external power source, it is characterized in that: also comprise level shifting circuit (3), described level shifting circuit (3) is by the first level shifting circuit (3-1), second electrical level change-over circuit (3-2), the 3rd level shifting circuit (3-3) and the 4th level shifting circuit (3-4) form, the output of a described RS232 interface circuit (1) is connected to the first optical coupling isolation circuit (2), the output of described the first optical coupling isolation circuit (2) is connected to the first level shifting circuit (3-1), the output of described the first level shifting circuit (3-1) is connected to first interface conversion chip MAX487E(4), described first interface conversion chip MAX487E(4) output is connected to second electrical level change-over circuit (3-2), the output of described second electrical level change-over circuit (3-2) is connected to the second optical coupling isolation circuit (11), the output of described the second optical coupling isolation circuit (11) is connected to the 3rd level shifting circuit (3-3), the output of described the 3rd level shifting circuit (3-3) is connected to the 4th level shifting circuit (3-4), described the 3rd level shifting circuit (3-3) also with a RS232 interface circuit (1) and the second interface conversion chip MAX487E(7) all join, described the second interface conversion chip MAX487E(7) output is connected to the 4th level shifting circuit (3-4), described the second interface conversion chip MAX487E(7) also join with the 2nd RS232 interface circuit (8), described first interface conversion chip MAX487E(4) join with RS485 interface circuit (6), described first interface conversion chip MAX487E(4) and between RS485 interface circuit (6) be also connected to lightning arrester (5).
2. according to a kind of mining information coffret claimed in claim 1, it is characterized in that: described the first optical coupling isolation circuit (2) mainly consists of the first light-coupled isolation chip TLP521-1, described the second optical coupling isolation circuit (11) mainly consists of the second light-coupled isolation chip TLP521-1.
3. according to a kind of mining information coffret described in claim 1 or 2, it is characterized in that: described the first level shifting circuit (3-1) is by MC14584B not gate IC8A, MC14584B not gate IC8B, MC14584B not gate IC8C, MC14584B not gate IC8E and MC14584B not gate IC8F, and resistance R 15, resistance R 17 and light-emitting diode D3 form, the input of described MC14584B not gate IC8A and MC14584B not gate IC8C all joins by resistance R 17 and described power converting circuit (10) VCC output, the input of the input of described MC14584B not gate IC8A and MC14584B not gate IC8C also joins with the pin 4 of described the first light-coupled isolation chip TLP521-1, the input of the input of the output of described MC14584B not gate IC8A and MC14584B not gate IC8B and MC14584B not gate IC8F all joins, the input of the output of described MC14584B not gate IC8F and described MC14584B not gate IC8E joins, the output of described MC14584B not gate IC8E and the anode of described light-emitting diode D3 join, the negative electrode of described light-emitting diode D3 is by resistance R 15 ground connection, the output of described MC14584B not gate IC8B and described first interface conversion chip MAX487E(4) pin 4 join, the output of described MC14584B not gate IC8C and described first interface conversion chip MAX487E(4) pin 2 and pin 3 join.
4. according to a kind of mining information coffret described in claim 1 or 2, it is characterized in that: described second electrical level change-over circuit (3-2) is by MC14584B non-gate ic7 A, MC14584B non-gate ic7 B, MC14584B non-gate ic7 C and MC14584B non-gate ic7 D, and resistance R 14 and light-emitting diode D2 composition, the input of described MC14584B non-gate ic7 B and described first interface conversion chip MAX487E(4) pin 1 join, the input of the input of the output of described MC14584B non-gate ic7 B and MC14584B non-gate ic7 A and MC14584B non-gate ic7 C all joins, the pin 2 of the output of described MC14584B non-gate ic7 A and described the second light-coupled isolation chip TLP521-1 joins, the input of the output of described MC14584B non-gate ic7 C and described MC14584B non-gate ic7 D joins, the output of described MC14584B non-gate ic7 D and the anode of light-emitting diode D2 join, the negative electrode of described light-emitting diode D2 is by resistance R 14 ground connection.
5. according to a kind of mining information coffret described in claim 1 or 2, it is characterized in that: described the 3rd level shifting circuit (3-3) comprises CD4093 NAND gate IC4A, CD4093 NAND gate IC4B, CD4093 NAND gate IC4C and CD4093 NAND gate IC4D, two inputs of described CD4093 NAND gate IC4A all join with the pin 14 of a described RS232 interface circuit (1), two inputs of the output of described CD4093 NAND gate IC4A and CD4093 NAND gate IC4B, and described the second interface conversion chip MAX487E(7) pin 2 and pin 3 join, the output of described CD4093 NAND gate IC4B and described the second interface conversion chip MAX487E(7) pin 4 join, an input and described the second interface conversion chip MAX487E(7 of described CD4093 NAND gate IC4C) pin 1 join, the pin 4 of another input of described CD4093 NAND gate IC4C and one end of resistance R 9 and the second light-coupled isolation chip TLP521-1 joins, the other end of described resistance R 9 and described power converting circuit (10)+5V output joins, two inputs of the output of described CD4093 NAND gate IC4C and described CD4093 NAND gate IC4D join, and the pin 8 of the output of described CD4093 NAND gate IC4D and a described RS232 interface circuit (1) joins.
6. according to a kind of mining information coffret claimed in claim 1, it is characterized in that: described the 4th level shifting circuit (3-4) is by MC14584B not gate IC3A, MC14584B not gate IC3B, MC14584B not gate IC3D, MC14584B not gate IC3E and MC14584B not gate IC3F, and light-emitting diode D1, light-emitting diode D4, light-emitting diode D5, light-emitting diode D6, resistance R 5, resistance R 6, resistance R 8 and resistance R 19 form, the output of the input of described MC14584B not gate IC3A and described CD4093 NAND gate IC4A joins, the input of the output of described MC14584B not gate IC3A and MC14584B not gate IC3B joins, the output of described MC14584B not gate IC3B and the anode of light-emitting diode D6 join, the negative electrode of described light-emitting diode D6 is by resistance R 5 ground connection, the input of described MC14584B not gate IC3D and described the second interface conversion chip MAX487E(7) pin 1 join, the output of described MC14584B not gate IC3D and the anode of light-emitting diode D5 join, and the negative electrode of described light-emitting diode D5 is by resistance R 6 ground connection, the output of the input of described MC14584B not gate IC3E and described CD4093 NAND gate IC4D joins, the output of described MC14584B not gate IC3E and the anode of light-emitting diode D1 join, the negative electrode of described light-emitting diode D1 is by resistance R 19 ground connection, the output of the input of described MC14584B not gate IC3F and described CD4093 NAND gate IC4B joins, the output of described MC14584B not gate IC3F and the negative electrode of light-emitting diode D4 join, the anode of described light-emitting diode D4 by resistance R 8 and described power converting circuit (10)+5V output joins.
7. according to a kind of mining information coffret claimed in claim 1, it is characterized in that: described first interface conversion chip MAX487E(4) by IC9 chip MAX487E, polar capacitor C1, resistance R 10, resistance R 11 and resistance R 13 form, the equal ground connection in one end of the pin 5 of described IC9 chip MAX487E and resistance R 13, one end of one end of described resistance R 10 and resistance R 11 all joins with the pin 6 of described IC9 chip MAX487E, the other end of the other end of described resistance R 13 and resistance R 10 all joins with the pin 7 of described IC9 chip MAX487E, the other end of described resistance R 11, the pin 8 of the positive pole of polar capacitor C1 and IC9 chip MAX487E all with described power converting circuit (10)+5V output joins, the minus earth of polar capacitor C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151325.5U CN203775255U (en) | 2014-03-31 | 2014-03-31 | Mining information transmission interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151325.5U CN203775255U (en) | 2014-03-31 | 2014-03-31 | Mining information transmission interface |
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| CN203775255U true CN203775255U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420151325.5U Expired - Fee Related CN203775255U (en) | 2014-03-31 | 2014-03-31 | Mining information transmission interface |
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| CN (1) | CN203775255U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216317A (en) * | 2014-08-15 | 2014-12-17 | 北京佳讯飞鸿电气股份有限公司 | Enabling signal control circuit used for improving data transmission reliability of RS485 bus |
| CN117394846A (en) * | 2023-12-13 | 2024-01-12 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
-
2014
- 2014-03-31 CN CN201420151325.5U patent/CN203775255U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216317A (en) * | 2014-08-15 | 2014-12-17 | 北京佳讯飞鸿电气股份有限公司 | Enabling signal control circuit used for improving data transmission reliability of RS485 bus |
| CN104216317B (en) * | 2014-08-15 | 2017-04-19 | 北京佳讯飞鸿电气股份有限公司 | Enabling signal control circuit used for improving data transmission reliability of RS485 bus |
| CN117394846A (en) * | 2023-12-13 | 2024-01-12 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
| CN117394846B (en) * | 2023-12-13 | 2024-02-27 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
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