PLC高可靠性体现在

1）所有的I/O 接口电路均采用光电隔离，使工业现场的外电路与PLC内部电路之间电气上隔离。

2）各输入端均采用R-C滤波器，其滤波时间常数一般为10~20ms。

3）各模块均采用屏蔽措施，以防止辐射干扰。

4）采用性能优良的开关电源。

5）对采用的器件进行严格的筛选。

6）良好的自诊断功能，一旦电源或其他软、硬件发生异常情况，CPU立即采用有效措施，以防止故障扩大。

7）大型PLC 还可以采用由双CPU 构成冗余系统或有三CPU 构成表决系统,使可靠性更进一步提高。

厦门兴润星贸易有限公司

    

  

  ★厦门兴润星贸易有限公司 ★

★联系人：陈金城 ★  

★Q Q ：2596132613 ★

★电话：0592-6895381  手机：18030263619★

★ 传真：0592-6034581 （注0031小陈收）★

★邮箱：2596132613@qq.com ★

★地址：福建省厦门市海沧区沧虹东路12号2002室★

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