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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