阅读说明：本技术 转换电路、转接板以及控制系统 (Conversion circuit, adapter plate and control system ) 是由 尹朋 侯晓东 兰启庆 于 2018-10-26 设计创作，主要内容包括：本申请公开了一种转换电路、转接板及控制系统,该转换电路包括正向电路,正向电路的输入端用于接收第一信号；反向电路,反向电路的输入端用于接收第二信号；隔离电路,与正向电路和反向电路耦接,用于将第一信号或者第二信号转换为第三信号,隔离电路的输出端与控制系统耦接,控制系统从隔离电路接收第三信号。通过上述方式,本申请无需额外焊接电子元件,易于现场维护和调试。(The application discloses a conversion circuit, a patch panel and a control system, wherein the conversion circuit comprises a forward circuit, and the input end of the forward circuit is used for receiving a first signal; the input end of the inverting circuit is used for receiving a second signal; and the isolation circuit is coupled with the forward circuit and the backward circuit and used for converting the first signal or the second signal into a third signal, the output end of the isolation circuit is coupled with the control system, and the control system receives the third signal from the isolation circuit. Through the mode, the electronic element does not need to be additionally welded, and the field maintenance and debugging are easy.)

A switching circuit for use in a control system, the switching circuit comprising at least:

a forward circuit, an input end of the forward circuit is used for receiving a first signal;

an inverting circuit, an input of the inverting circuit receiving a second signal;

an isolation circuit coupled to the forward circuit and the backward circuit for converting the first signal or the second signal into a third signal, an output of the isolation circuit being coupled to the control system, the control system receiving the third signal from the isolation circuit.

The conversion circuit of claim 1, wherein the forward circuit comprises at least a first resistor, one end of the first resistor is configured to receive the first signal, and the other end of the first resistor is connected to the isolation circuit.

The switching circuit according to claim 2, wherein the inverter circuit comprises at least a second resistor, a third resistor and a switching tube, one end of the second resistor is configured to receive the second signal, the other end of the second resistor is connected to the first end of the switching tube, one end of the third resistor is connected to the first end of the switching tube, the other end of the third resistor is grounded, the second end of the switching tube is connected to one end of the first resistor, and the third end of the switching tube is connected to the other end of the third resistor.

The conversion circuit according to claim 3, wherein the isolation circuit comprises an optical coupler isolator and a fourth resistor, a first reference voltage is input to a first end of the optical coupler isolator, a second end of the optical coupler isolator is connected to the other end of the first resistor, a third end of the optical coupler isolator is connected to one end of the fourth resistor, a second reference voltage is input to the other end of the fourth resistor, a fourth end of the optical coupler isolator is grounded, and a third end of the optical coupler isolator is an output end of the isolation circuit.

The conversion circuit of claim 4, wherein when the first signal is high, the optocoupler isolator is turned off, and the third signal is high; when the first signal is at a low level, the optical coupler isolator is switched on, and the third signal is at a low level.

The conversion circuit of claim 4, wherein when the second signal is high, the optocoupler isolator is on, and the third signal is low; when the second signal is at a low level, the optical coupling isolator is cut off, and the third signal is at a high level.

The conversion circuit according to claim 4, wherein the switching tube is an NPN transistor, the first end of the switching tube is a base of the NPN transistor, the second end of the switching tube is a collector of the NPN transistor, and the third end of the switching tube is an emitter of the NPN transistor.

The conversion circuit according to claim 4, wherein the switch tube is an N-type MOS tube, the first terminal of the switch tube is a gate of the N-type MOS tube, the second terminal of the switch tube is a drain of the N-type MOS tube, and the third terminal of the switch tube is a source of the N-type MOS tube.

A control system comprising a conversion circuit by which the control system obtains a first signal or a second signal from a load, the conversion circuit comprising at least:

a forward circuit, an input of the forward circuit for receiving the first signal;

an inverting circuit, an input of the inverting circuit receiving the second signal;

an isolation circuit coupled to the forward circuit and the backward circuit for converting the first signal or the second signal into a third signal, an output of the isolation circuit being coupled to the control system, the control system receiving the third signal from the isolation circuit.

The control system of claim 9, wherein the forward circuit comprises at least a first resistor, one end of the first resistor is configured to receive the first signal, and the other end of the first resistor is connected to the isolation circuit.

The control system according to claim 10, wherein the inverter circuit comprises at least a second resistor, a third resistor and a switch tube, one end of the second resistor is configured to receive the second signal, the other end of the second resistor is connected to the first end of the switch tube, one end of the third resistor is connected to the first end of the switch tube, the other end of the third resistor is grounded, the second end of the switch tube is connected to one end of the first resistor, and the third end of the switch tube is connected to the other end of the third resistor.

The control system according to claim 11, wherein the isolation circuit comprises an optical coupler isolator and a fourth resistor, a first reference voltage is input to a first end of the optical coupler isolator, a second end of the optical coupler isolator is connected with the other end of the first resistor, a third end of the optical coupler isolator is connected with one end of the fourth resistor, a second reference voltage is input to the other end of the fourth resistor, a fourth end of the optical coupler isolator is grounded, and a third end of the optical coupler isolator is an output end of the isolation circuit.

The control system of claim 12, wherein the optocoupler isolator is off when the first signal is high, and the third signal is high; when the first signal is at a low level, the optical coupler isolator is switched on, and the third signal is at a low level.

The control system of claim 12, wherein the optocoupler isolator is on when the second signal is high, and the third signal is low; when the second signal is at a low level, the optical coupling isolator is cut off, and the third signal is at a high level.

The control system according to claim 12, wherein the switching tube is an NPN transistor, the first end of the switching tube is a base of the NPN transistor, the second end of the switching tube is a collector of the NPN transistor, and the third end of the switching tube is an emitter of the NPN transistor.

The control system according to claim 12, wherein the switch tube is an N-type MOS tube, the first end of the switch tube is a gate of the N-type MOS tube, the second end of the switch tube is a drain of the N-type MOS tube, and the third end of the switch tube is a source of the N-type MOS tube.

An adapter plate, characterized in that the adapter plate is provided with a conversion circuit according to any one of claims 1-8.