Description
在DCS系统中,远程I/O采用HART总线比较多。比如现场的变送器,离控制器机柜距璃比较远,把16个变送器来的信号编成为一组,用HART总线把信号送到控制器,空制器同时读进16个变送器来的信号。控制器和变送器两者距离可达1公里以上。
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