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CN209708119U 一种半双工RS232-RS485自动转换电路及通信设备 有权

一种半双工RS232-RS485自动转换电路及通信设备
摘要：
本公开提供了一种半双工RS232-RS485自动转换电路及通信设备，包括RS232电平转换模块、RS485电平转换模块和收发转换电平产生模块，所述RS232电平转换模块与RS485电平转换模块通信连接，用于将RS232电平转换成TTL电平并输送给RS485电平转换模块，所述RS485电平转换模块用于将接收到的TTL电平转换模块转换成RS485差分电平；所述收发转换电平产生模块与RS232电平转换模块的输出端连接，用于根据接收到的TTL电平信号产生收发控制电平并发送给RS485电平转换模块，用于控制RS485电平转换模块的收发转换；解决了不同波特率需要切换延时时间的问题，转换电路在不同波特率下自动工作，不需要单独配置，成本较低。
摘要（英）：

The utility model provides a half-duplex RS232-RS485 automatic conversion circuit and a communication device. The circuit comprises an RS232 level conversion module, an RS485 level conversion module and a transceiving conversion level generation module, the RS232 level conversion module is in communication connection with the RS485 level conversion module; wherein the RS232 level conversion moduleis used for converting RS232 level into TTL level and transmitting the TTL level to the RS485 level conversion module, and the RS485 level conversion module is used for converting the received TTL level conversion module into RS485 differential level; the transceiving conversion level generation module is connected with the output end of the RS232 level conversion module, is used for generating atransceiving control level according to the received TTL level signal and sending the transceiving control level to the RS485 level conversion module, and is used for controlling transceiving conversion of the RS485 level conversion module; the problem that delay time needs to be switched for different baud rates is solved, the conversion circuit automatically works under different baud rates, independent configuration is not needed, and the cost is low.

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