厂商 :厦门泰尼电气科技有限公司
福建 厦门- 主营产品:
- 西门子
- 西屋
- 福克斯波罗
联系电话 :18030265259
商品详细描述
1752-L24BBBE
1752-L24BBBE
1752-L24BBBE
2.PLC控制系统中电磁干扰的主要来源有哪些呢?
1) 来自空间的辐射干扰
空间的辐射电磁场主要是由电力网络、电气设备的暂态过程、雷电、无线电广播、电视、雷达、高频感应加热设备等产生的,通常称为辐射干扰。其分布极为复杂,若plc系统置于所设频场内,就回收到辐射干扰,其影响主要通过两条路劲,一是直接对PLC内部的辐射,由电路感应产生干扰,而是对PLC通信内网络的辐射,出通信线路的感应引入干扰。辐射干扰与现场设备所产生的电磁干场大小,特别是频率有关,一般通过设置屏蔽电缆和PLC局部屏蔽及高压泻放元件进行保护。
2) 来自系统外引线的干扰
主要通过电源和信号线引入,通常称为传导干扰。这种干扰在我国工业现场教严重。
3) 来自电源的干扰
实践证明,因电源引入的干扰造成控制系统故障的情况很多,在,工程调式中遇到过,后更换隔离性能较高的PLC电源。问题才能得到解决。
备货,备货,降降降,火火火,火火火……
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公司名称:厦门泰尼电气有限公司
联系人:小黄(销售代表)
联系电话:0592-6809319
传真号码:0592-6890859(麻烦备注01006收)
手机:18950191386
QQ号码:2917675397
邮箱:2917675397@qq.com
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