Implementation method of programmable general digital quantity I/O signal conditioning
A technology of signal conditioning and implementation method, applied in the direction of logic circuits using optoelectronic devices, logic circuits using specific components, etc., can solve the problems of increased material resources, time-consuming, and cannot be completed at the same time, and achieves low cost, simple and fast control. , to achieve the effect of isolation
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Embodiment 1
[0039] Such as image 3 As shown, the design circuit in this embodiment is composed of a first MCU processing unit and an isolated electronic switch conditioning circuit, wherein the isolated electronic switch conditioning circuit is composed of N conditioning output signal channels, and each channel is composed of six groups of different isolation channels. Voltage isolating switch circuit.
[0040] Such as image 3 As shown, in the signal output channel, each group of output channels is composed of six groups of isolation switch circuits connected with different isolation voltages, specifically: in the output channel DO(i), resistor R1, optocoupler U1 and transistor V1 constitute The first set of isolating switch circuit is established, the isolation voltage is 5V, where the collector of optocoupler U1 is connected to one end of resistor R1, the other end of resistor R1 is connected to 5V power supply, the emitter of optocoupler U1 is connected to the base of triode V1, and...
Embodiment 2
[0051] Such as Figure 4 As shown, the design circuit in the embodiment is composed of a second MCU processing unit, a switching circuit, a signal switching circuit and an isolation optocoupler.
[0052] Such as Figure 4 As shown, in the first DO(i) input channel, the switching circuit includes resistors R24, R25, R26, R27, R16, R17, R18, R19 and transistors V13, V14, V15, V16; among them, the resistors R24, R25 One end of R26 and R27 is connected to the cathode of the light-emitting diode of optocoupler U16, the other end of resistors R24, R25, R26 and R27 are respectively connected to the collectors of transistors V16, V15, V14 and V13, and the collectors of transistors V13, V14, V15 and V16 The emitters are commonly connected to the anode of the output terminal of the optocoupler U17 and the anode of the output terminal of the optocoupler U18, the bases of the transistors V13, V14, V15 and V16 are respectively connected to one end of the resistors R16, R17, R18 and R19, a...
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