BENTLY NEVADA 3300/16-02-01-03-00-00-02

• 型号：3300/16-02-01-03-00-00-02


• 数量：3


• 制造商：　厦门兴锐达自动化设备有限公司


• 有效期：2019/10/10 0:00:00

BENTLY NEVADA 3300/16-02-01-03-00-00-02

BENTLY NEVADA 3300/16-02-01-03-00-00-02

BENTLY NEVADA 3300/16-02-01-03-00-00-02

可编程序控制器的输出信号类型可以是开关量、模拟量和数字量。输出单元从广义上分包含两部分：一是与被控设备相连接的接口电路，另一部分是输出的映像寄存器。

      PLC运行时CPU从输入映像寄存器读取输入信息并进行处理，将处理结果放到输出映像寄存器。输出映像寄存器由输出点相对应的触发器组成，输出接口电路将其由弱电控制信号转换成现场需要的强电信号输出，以驱动电磁阀、接触器、指示灯等被控设备的执行元件。

　　输出接口电路通常有三种类型：继电器输出型、晶体管输出型和晶闸管输出则。每种输出电路都采用电气隔离技术，电源由外部提供，输出电流一般为1.5—2A，输出电流的额定值与负载的性质有关。

　　为使PLC避免受瞬间大电流的作用而损坏，输出端外部接线必须采用保护措施：一是输出公共端接熔断器；二是采用保护电路，对交流感件负载，一般用阻容吸收回路；对直流感性负载用续流二极管。极大部分的PLC的输出端子采用分组式和分隔式。对于晶体管输出型还有源型输出和漏型输出两种形式。极大部分的欧美品牌的PLC采用源型输出，而极大部分的亚洲品牌的PLC采用漏型输出。

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