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GE GPS1BHAL

PLC的主要特點

(一)高可靠性

1.所有的I/O接口電路均采用光電隔離，使工業(yè)現場的外電路與

PLC內部電路之間電氣上隔離。

2.各輸入端均采用R-C濾波器，其濾波時間常數一般為10~20ms.

3.各模塊均采用屏蔽措施，以防止輻射干擾。

4.采用性能優(yōu)良的開關電源。

5.對采用的器件進行嚴格的篩選。

6.良好的自診斷功能，一旦電源或其他軟，硬件發(fā)生異常情況，CPU立即采用有效措施，以防止故障擴大。

7.大型PLC還可以采用由雙CPU構成冗余系統或有三CPU構成表決系統,使可靠性更進一步提高。

豐富的I/O接口模塊

PLC針對不同的工業(yè)現場信號，如:

●交流或直流;

●開關量或模擬量; .

●電壓或電流;

●脈沖或電位;

●強電或弱電等。

有相應的I/O模塊與工業(yè)現場的器件或設備，如:

●按鈕

●行程開關

●接近開關

●傳感器及變送器

●電磁線圈

●控制閥

直接連接。另外為了提高操作性能，它還有多種人-機對話的接口模塊;為了組成工業(yè)局部網絡，它還有多種通訊聯網的接口模塊，等等。

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12L0-0009-A8 For GE Multilin Distribution Feeder Protection system Board 

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