CN210776261U

CN210776261U - Electronic circuit board for realizing multi-path IO control

Info

Publication number: CN210776261U
Application number: CN201922004573.2U
Authority: CN
Inventors: 程卓
Original assignee: Shenzhen Jettest Electronic Equipment Co ltd
Current assignee: Shenzhen Jettest Electronic Equipment Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-06-16
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a realize electronic circuit board of multichannel IO control, including communication circuit, power supply circuit, singlechip circuit, output circuit and input circuit, communication circuit with singlechip circuit passes through RX and TX pin electric connection, input circuit with singlechip circuit passes through pin IN01, IN02, IN03I and N04 electric connection, output circuit with singlechip circuit passes through pin O1 ~ O32 electric connection, power supply circuit pass through pin VDD with communication circuit with singlechip circuit electric connection, power supply circuit through 5V + pin with input circuit with output circuit electric connection. The power supply can be matched with most industrial control power supplies, is compatible with various communication modes, and has variable output level signals and adjustable input signals.

Description

Electronic circuit board for realizing multi-path IO control

Technical Field

The utility model relates to a circuit board technical field, concretely relates to realize electronic circuit board of multichannel IO control.

Background

Under the condition that industrial automation is more and more common, a common IO control panel has a single communication mode, fixed IO input and output levels and strict requirements on matched hardware; in order to meet the universality under the industrial control environment, an IO control panel which is compatible with various communication modes, wide in power supply voltage range, variable in output high and low levels and adjustable in input high and low signals is developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a realize electronic circuit board of multichannel IO control solves one or more among the above-mentioned prior art problem, and this application can match most industrial control power, and compatible multiple communication mode, output level signal are variable, and input signal is adjustable.

According to the utility model discloses a realize electronic circuit board of multichannel IO control, including communication circuit, power supply circuit, singlechip circuit, output circuit and input circuit, communication circuit with the singlechip circuit passes through RX and TX pin electric connection, input circuit with the singlechip circuit passes through pin IN01, IN02, IN03 and N04 electric connection, output circuit with the singlechip circuit passes through pin O1 ~ O32 electric connection, power supply circuit pass through pin VDD with communication circuit and singlechip circuit electric connection, power supply circuit pass through 5V + pin with input circuit with output circuit electric connection; the beneficial effects are as follows: the singlechip can be simultaneously connected with two groups of communication circuits, can be selected according to different requirements and is compatible with more communication modes; meanwhile, the power supply input voltage selection range is large, and the power supply can adapt to most industrial control power supplies and different scenes; the output circuit controls the output high and low level according to the increase or non-increase of the pull-up resistor.

In some embodiments, the communication circuit is provided with two different sets of communication circuits of RS485 half-duplex and RS232 full-duplex, and the communication circuit can select two serial port communication modes of RS485 half-duplex and RS232 full-duplex to be connected and communicated with the PC end; the design enables the TTL signals which can be received by the single chip microcomputer and the serial port signals which can be received by the upper computer to be mutually converted, and the application is wider.

In some embodiments, the power circuit is a low-voltage linear voltage stabilizing circuit composed of a DC-DC chip, the input voltage range is from DC6.5V to 40V, and the stabilized voltage output DC5V is used for supplying power to the IO control board to normally work; this design makes this application can match more diversified industry control power, requires greatly reduced to operational environment.

In some embodiments, the single chip microcomputer circuit is provided with 4-way dial switches, the single chip microcomputer circuit can realize addressing from 0 to 15 through the 4-way dial switches, a plurality of control boards are in serial communication and process instructions sent by an upper computer, and control the signal output circuit through an IO pin and receive information fed back by the signal input circuit; the design makes the application compatible with various communication modes, and the application range is wider.

In some embodiments, the output circuit is provided with 4 groups of darlington transistors, the output circuit is driven by 4 groups of darlington transistor arrays to control 32 paths of output, the level of an IO pin provided by a single chip microcomputer circuit is converted into high level output or low level output which can be received by a docking device through increasing or not of a pull-up resistor, the level signal realizes the purpose of adjusting the voltage by selecting the supply voltage or external voltage of a control board through a jumper cap, and the level voltage range can reach DC5V-DC 40V; the design enables the output level to be adjusted according to actual voltage requirements, and the method is more practical.

In some embodiments, the input circuit is provided with a pull-up resistor circuit and a triode amplification circuit, the input circuit selects the pull-up resistor circuit and the triode amplification circuit through a jumper cap to select high-level triggering and low-level triggering of an input signal, and the fed-back signal is connected to the single chip circuit; the design ensures that the input signal mode and the signal size can be selected, so that the input signal is more stable and clear.

The utility model has the advantages of wide range of power supply voltage, and can be matched with most direct current power supplies under industrial control environment; compatible with various communication modes; the output level can be adjusted according to the actual voltage requirement; the input signal triggering mode and the level signal size can be selected.

Drawings

Fig. 1 is a schematic diagram of a work flow structure of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention;

fig. 2 is a schematic view of a communication circuit structure of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a power circuit structure of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an input circuit structure of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a single chip microcomputer circuit structure of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an output circuit of an electronic circuit board for implementing multi-channel IO control according to an embodiment of the present invention.

The corresponding circuit names represented by the numbers in the figures: 1-communication circuit 2-power supply circuit 3-single chip circuit 4-output circuit 5-input circuit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2:

according to the utility model discloses a realize electronic circuit board of multichannel IO control, including communication circuit 1, power supply circuit 2, single chip microcomputer circuit 3, output circuit 4 and input circuit 5, communication circuit 1 passes through RX and TX pin electric connection with single chip microcomputer circuit 3, input circuit 5 passes through pin IN01 with single chip microcomputer circuit 3, IN02, IN03I and N04 electric connection, output circuit 4 and single chip microcomputer circuit 3 pass through pin O1 ~ O32 electric connection, power supply circuit 2 passes through pin VDD and communication circuit 1 and single chip microcomputer circuit 3 electric connection, power supply circuit 2 passes through 5V + pin and input circuit 5 and output circuit 4 electric connection.

As shown in fig. 3: the communication circuit 1 is provided with two different sets of communication circuits of RS485 half-duplex and RS232 full-duplex, and the communication circuit 1 can select two serial port communication modes of RS485 half-duplex and RS232 full-duplex to be connected with a PC (personal computer) end for communication.

As shown in fig. 4: the power circuit 2 is a low-voltage linear voltage stabilizing circuit composed of a DC-DC chip, the input voltage range is from DC6.5V to 40V, and the stabilized voltage output DC5V is used for providing power for the IO control panel to normally work.

As shown in fig. 5: the single chip microcomputer circuit 3 is provided with 4 paths of dial switches, the single chip microcomputer circuit 3 can realize addressing from 0 to 15 through the 4 paths of dial switches, a plurality of control board cards are in serial communication and process instructions sent by an upper computer, and the signal output circuit is controlled through an IO pin and receives information fed back by the signal input circuit.

As shown in fig. 6: the output circuit 4 is provided with 4 groups of Darlington transistors, the output circuit 4 is driven by 4 groups of Darlington transistors to control 32 paths of output, the level of an IO pin provided by the singlechip circuit 3 is converted into high level output or low level output which can be received by butt joint equipment according to the increase of a pull-up resistor, the level signal selects the power supply voltage or external voltage of a control panel through a jumper cap to realize the purpose of adjusting the voltage, and the level voltage range can reach DC5V-DC 40V.

The input circuit 5 is provided with a pull-up resistor circuit and a triode amplifying circuit, the input circuit 5 selects the pull-up resistor circuit and the triode amplifying circuit through a jumper cap to select high-level triggering and low-level triggering of input signals, and the fed-back signals are connected into the single chip circuit.

Detailed description of the preferred embodiment 1

The test system needs a device model hua instrument 7315 grounding resistance tester, the input ports of the grounding tester are only provided with one group, 8 products are automatically connected to an alternating current grounding impedance tester in turn to test the actual impedance value of the shell of each product to the ground, the IO control card needs to be used to realize the function, namely, the serial port of a PC end is connected with a communication connecting terminal DB9 connector of the IO control card in an RS232 communication mode, the related parameters of the serial port connected with an IO control board communication circuit are set in a communication mode matched with the IO control board, namely, the baud rate of the serial port is set to 38400bps, the data bit is 8, the check bit is 0, and the stop bit is 1; connecting 1 24V power supply to a power interface of an IO control card to supply power to the control card and dialing address bits of the control card to address 01, wherein default output of output connectors of the control card is high level, a first group of 8P high positive terminal connectors of the IO control card are respectively connected to control ends of 8 high-voltage relays, the other end of each high-voltage relay is connected with DC24V +, a PC end sends a serial port instruction '010101 FF 02' (the instruction indicates that high level is output by an IO port of a first group of a first path of the IO control card with address 01), after receiving the instruction through communication, the IO control card immediately replies data '010102' to an IO control card with address 01 of an upper computer to receive the instruction and simultaneously change the level of an IO port of an MCU mentioned by the instruction from low level to high level, and the high level of the IO port is converted into a low level signal through an output circuit, that is, one end of the control end of the relay is DC24V +, the other end is DC24V-, the relay contact is attracted, the first path product is connected with the input port of the AC grounding impedance tester, the actual impedance between the shell of the first path product and the ground is measured, after the test is finished, the PC end sends a serial port instruction '0101010003' (the instruction represents that the IO port of the first group of the IO control card with the address of 01 outputs low level), the IO control card immediately replies a series of data '010102' after receiving the instruction through communication and returns the data to the IO control card with the address of 01 of the upper computer to receive the instruction, and simultaneously changes the level of the IO port of the MCU mentioned by the instruction from high level to low level, the low level of the IO port is converted into a signal with high level through an output circuit, namely, both ends of the control end of the relay are DC24V +, the contact is disconnected, namely the first path product is disconnected with the input port of the AC grounding impedance tester, and sequentially testing the grounding resistance of the 8-path product according to the testing steps.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, similar modifications and improvements can be made without departing from the inventive concept of the present invention, and these are also considered to be within the protection of the present invention.

Claims

1. The utility model provides an electronic circuit board of realization multichannel IO control which characterized in that: including communication circuit (1), power supply circuit (2), singlechip circuit (3), output circuit (4) and input circuit (5), communication circuit (1) with singlechip circuit (3) is through RX and TX pin electric connection, input circuit (5) with singlechip circuit (3) is through pin IN01, IN02, IN03 and N04 electric connection, output circuit (4) with singlechip circuit (3) is through pin O1 ~ O32 electric connection, power supply circuit (2) through pin VDD with communication circuit (1) with singlechip circuit (3) electric connection, power supply circuit (2) through 5V + pin with input circuit (5) with output circuit (4) electric connection.

2. The electronic circuit board for realizing multi-channel IO control according to claim 1, characterized in that the communication circuit (1) is provided with two different sets of communication circuits of RS485 half-duplex and RS232 full-duplex, and the communication circuit (1) can select two serial communication modes of RS485 half-duplex and RS232 full-duplex to be connected with a PC terminal for communication.

3. The electronic circuit board for realizing multi-channel IO control according to claim 1, characterized in that the power circuit (2) is a low voltage linear voltage regulator circuit composed of a DC-DC chip, the input voltage range is DC6.5V to 40V, and the regulated output DC 5V.

4. The electronic circuit board for realizing multi-channel IO control according to claim 1, characterized in that the single chip circuit (3) is provided with a 4-channel dial switch, the single chip circuit (3) can realize addresses from 0 to 15 through the 4-channel dial switch, the plurality of control boards are in serial communication and process commands sent by an upper computer, control the signal output circuit through the IO pins, and receive information fed back by the signal input circuit.

5. The electronic circuit board for realizing multi-channel IO control according to claim 1, wherein the output circuit (4) is provided with 4 sets of Darlington transistors, the output circuit (4) is driven by the 4 sets of Darlington transistor arrays to control 32 outputs, the IO pin level provided by the single chip microcomputer circuit is converted into a high level output or a low level output which can be received by a docking device through the increase or non-increase of a pull-up resistor, the level signal realizes the purpose of voltage size adjustment through the selection of a jumper cap on a control board supply voltage or an external voltage, and the level voltage range can reach DC5V-DC 40V.

6. The electronic circuit board for realizing multi-channel IO control according to claim 1, characterized in that the input circuit (5) is provided with a pull-up resistor circuit and a triode amplifier circuit, and the input circuit (5) selects the pull-up resistor circuit and the triode amplifier circuit through a jumper cap to select high-level triggering and low-level triggering of the input signal, and connects the feedback signal to the single chip circuit (3).