Serial communication protection device
The utility model discloses a serial communication protection device. The serial communication protection device is characterized in that the serial communication protection device includes a protector arranged between a PC and an instrument. The protector is composed of a shell and a protector cont...
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| Hauptverfasser: | , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses a serial communication protection device. The serial communication protection device is characterized in that the serial communication protection device includes a protector arranged between a PC and an instrument. The protector is composed of a shell and a protector control circuit arranged inside the shell, wherein the protector control circuit includes a serial port transceiver U1, a power source decoupling circuit and a port protection circuit. The serial port transceiver U1 is connected in parallel with charge pump capacitors of E1, E2, E3 and E4 respectively. A resistor R1 is connected in series with a light-emitting diode LD1, such that the power source decoupling circuit can be formed; one end of the power source decoupling circuit is connected with a 16 pin of the serial port transceiver U1; and the other end of the power source decoupling circuit is grounded. A resistor R2 is connected in series with a transient voltage suppression diode TVS1, and a resistor R3 is connect |
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