首页 变压器原材料 1746-A7/B

1746-A7/B

发布时间 2018-04-12 收藏 分享
价格 2258.00
区域 福建省
来源 厦门泰尼电气科技有限公司

详情描述:

1746-A7/B

1746-A7/B

1746-A7/B

   PLC与电气回路的接口,是通过输入输出部分(I/O)完成的。I/O模块集成了PLC的I/O电路,其输入暂存器反映输入信号状态,输出点反映输出锁存器状态。输入模块将电信号变换成数字信号进入PLC系统,输出模块相反。I/O分为开关量输入(DI),开关量输出(DO),模拟量输入(AI),模拟量输出(AO)等模块。

            开关量是指只有开和关(或1和0)两种状态的信号,模拟量是指连续变化的量。常用的I/O分类如下:

            开关量:按电压水平分,有220VAC、110VAC、24VDC,按隔离方式分,有继电器隔离和晶体管隔离。

            模拟量:按信号类型分,有电流型(4-20mA,0-20mA)、电压型(0-10V,0-5V,-10-10V)等,按精度分,有12bit,14bit,16bit等。


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