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为了解决普通计算机的RS-232串行接口与带有RS-485串行接口的数据采集模块、监控系统的通讯,提出了一种使用最少信号线就能实现,且不需要RS-232标准电平与TTL电平转换芯片的半双工通讯的RS-232与RS-485转换器的设计方案,该方案实现简单、可靠性高,具有一定的实用价值.
In order to solve the common computer RS-232 serial interface with RS-485 serial interface with the data acquisition module, the monitoring system communication, proposed using a minimum of signal lines can be achieved, and does not require RS-232 standard power The design scheme of RS-232 and RS-485 converter of half-duplex communication with flat and TTL level conversion chip is simple and reliable, and has certain practical value.