Description
DCS控制系统AI点数如何计算
AI指进入DCS系统或PLC的模拟量输入信号。从现场可以直接输入DCS系统的AI输入信号有热电偶(J、K、T、N、E、R、S和B分度号热电偶)、热电阻信号(Cu50、Cu100、Pt100和Pt50分度号)、标准电流信号(4-20mA、0-20mA)、标准电压信号(1-5V、0-5V和0-10V)和脉冲信号;其他形式的信号如需送入DCS系统,则要用信号隔离器、电流变送器、电压变送器等信号转换设备将该信号转换为4-20mA或1-5V在送入DCS系统。
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