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串口RS232和RS485有什么区别?
串口RS232 和RS485 是两种不同的串行通信接口标准,它们有以下几方面的区别: RS232 接口通常以 9 个引脚 (DB9) 或 25 个引脚 (DB25) 的形式出现,而 RS485 接口没有具体的物理形状,可以根据实际情况采用不同的接口。
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