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1746-IV16
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在工业自动化控制中，经常会遇到开关量，数字量，模拟量，离散量，脉冲量等
各种概念，而人们在实际应用中，对于这些概念又很容易混淆。现将各种概念罗
列如下：
1.开关量：一般指的是触点的“开”与“关”的状态，一般在计算机设备中也会
用“0”或“1”来表示开关量的状态。开关量分为有源开关量信号和无源开关量
信号，有源开关量信号指的是“开”与“关”的状态是带电源的信号，专业叫法
为跃阶信号，可以理解为脉冲量，一般的都有220VAC, 110VAC,24VDC,12VDC等信
号，无源开关量信号指的是“开”和“关”的状态时不带电源的信号，一般又称
之为干接点。电阻测试法为电阻0或无穷大。
◆ 企业名称：厦门泰尼电气有限公司
◆ 企业性质： 有限责任公司
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区： 全国
◆ 联系人： 小廖女士）
◆ 电话：0592-6539066
◆ 联系手机：13400716209
◆ QQ:1490371370
◆ 传真：0592-6890859 （备注“01008”收）
◆ E-mail： 1490371370@qq.com
◆ 邮政编码： 361026
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