Redundant serial communication device with automatic replacing function

Abstract

The invention discloses a redundant serial communication device with an automatic replacing function. The redundant serial communication device with the automatic replacing function comprises a power module, a high-voltage anti-latch type four-channel single-pole single-throw (SPST) switch, a control unit, a sensor unit, a first serial port unit and a second serial port unit, wherein the first serial port unit and the second serial port unit are redundant for each other. The first serial port unit comprises a first serial port chip module and a first low input voltage load current-limit switch module. The second serial port unit comprises a second serial port chip module and a second low input voltage load current-limit switch module. The control unit controls the first serial port chip module or the second serial port chip module to be connected with external serial port modules through the high-voltage anti-latch type four-channel SPST switch. The redundant serial communication device with the automatic replacing function has the advantages of being safe and reliable, capable of monitoring and replacing damaged chips automatically, simple in circuit structure, and long in service life.

Description

technical field [0001] The invention belongs to the technical field of serial communication, and in particular relates to a redundant serial communication device with an automatic replacement function. Background technique [0002] In recent years, with the development of science and technology, the serial port has been widely used as a common device communication protocol on the computer, especially the serial port has also become a common communication protocol for many instrumentation equipment. In addition, many GPIB-compatible devices also have RS-232 ports, and the development of multi-serial communication devices and today's Internet of Things is inseparable from the use of serial ports, which realize the sending and receiving of data. [0003] However, because the interface signal level of the serial port is relatively high, it is easy to damage the chip of the interface circuit, and because it is incompatible with the TTL level, it is necessary to use a level conver...

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Problems solved by technology

[0003] However, because the interface signal level of the serial port is relatively high, it is easy to damage the chip of the interface circuit, and because it is incompatible with the TTL level, it is necessary to use a level conversion circuit to connect with the TTL circuit.

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