1756-PA72
1756-PA72
1756-PA72
動(dòng)力線(xiàn)、控制線(xiàn)以及PLC的電源線(xiàn)和I/O線(xiàn)應(yīng)分別配線(xiàn),隔離變壓器與PLC和I/O之間應(yīng)采用雙絞線(xiàn)連接。將PLC的I/O線(xiàn)和大功率線(xiàn)分開(kāi)走線(xiàn),如必須在同一線(xiàn)槽內(nèi),分開(kāi)捆扎交流線(xiàn)、直流線(xiàn),若條件允許,分槽走線(xiàn)好,這不僅能使其有盡可能大的空間距離,并能將干擾降到低限度。此外利用信號(hào)隔離器解決干擾問(wèn)題也是很理想的辦法,其原理是首先將PLC接收的信號(hào),通過(guò)半導(dǎo)體器件調(diào)制變換,然后通過(guò)光感或磁感器件進(jìn)行隔離轉(zhuǎn)換,然后再進(jìn)行解調(diào)變換回隔離前原信號(hào)或不同信號(hào),同時(shí)對(duì)隔離后信號(hào)的供電電源進(jìn)行隔離處理。保證變換后的信號(hào)、電源、地之間獨(dú)立。只要在有干擾的地方,輸入端和輸出端中間加上這種隔離器,就可有效解決干擾問(wèn)題。
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Allen-Bradley 廈門(mén)泰尼電氣有限公司
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Reliance Electric Company 0-51874 Module 051874 USED
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1756-PA72
1756-PA72
1756-PA72