6SL3352-3AG34-1AA0

6SL3352-3AG34-1AA0

6SL3352-3AG34-1AA0

DO输出点数如何计算

DO指控制系统发出的控制现场设备的开关量输出信号，通常通过中间继电器再接入其他不同电压等级的用电设备。仪表专业DO输出常用于控制外部指示灯、电磁阀、声光报警器、电气控制和多回转电动执行机构、接触器等设备。

系统控制不同设备其所需要的DO输出点数不同，以下是常见被控对象I/O点数:

（1）开关型电动执行机构：每台执行机构阀位反馈4-20mA计算AI输入1点，阀门正转/反转控制计算DO输出2个点，阀门开到位/阀门关到位信号计算DI输入2个点 ，阀门开过力矩/关过力矩故障信号计算DI输入2点。

（2）开关型多回转电动执行机构（AC380V电源）：每台执行机构阀位反馈4-20mA计算AI输入1点（如无反馈信号则不计算该AI点数），阀门正转/反转控制计算DO输出2个点，阀门开到位/阀门关到位（限位开关）计算DI输入2个点，执行器开过力矩/关过力矩故障信号计算DI输入2点。

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