3HAC023714-001
3HAC023714-001
2.3 正確選擇接地點(diǎn),完善接地系統(tǒng)。
良好的接地是保證PLC可靠工作的重要條件,可以避免偶然發(fā)生的電壓沖擊危害。接地的目的通常有兩個(gè),其一為了安全,其二是為了抑制干擾。完善的接地系統(tǒng)是PLC控制系統(tǒng)抗電磁干擾的重要措施之一。在PLC控制系統(tǒng)中,具有多種形式的“接地”,主要有:
(1)信號(hào)地。輸入端信號(hào)元件的地;
(2)交流地。交流供電電源的N線;
(3)屏蔽地。為防止靜電和磁場(chǎng)感應(yīng)而設(shè)置的外殼或金屬絲網(wǎng),通過(guò)專門的銅導(dǎo)線將其接入地下;
(4)保護(hù)地。將機(jī)器設(shè)備的外殼或設(shè)備內(nèi)獨(dú)立器件的外殼接地,用于保護(hù)人身安全和防止設(shè)備漏電。
【公 司】: 福建鴻飛達(dá)自動(dòng)化科技有限公司
產(chǎn)品價(jià)格以電話或者QQ詢價(jià)為準(zhǔn),發(fā)布價(jià)格不做參考,圖片也一樣
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【主 營(yíng)】: AB(羅克韋爾)PLC全系列、ABB機(jī)器人系統(tǒng)備件、施耐德140/TSX、西門子6SN/6FC、伺服系統(tǒng)全套等
【價(jià) 格】: 電議
【發(fā)布人】: 程先生
【電 話】: 15306977024 13625073704
【所在地】: 福建 - 福州
【坐 機(jī)】: 0591-83532940
【Q Q】: 2851617309
【傳 真】: 0591-88263940
【郵 箱】: 2851617309@qq.com