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電源接線
PLC供電電源為50Hz、220V±10%的交流電。
FX系列可編程控制器有直流24V輸出接線端。該接線端可為輸入傳感(如光電開關(guān)或接近開關(guān))提供直流24V電源。
如果電源發(fā)生故障，中斷時間少于10ms，PLC工作不受影響。若電源中斷超過10ms或電源下降超過允許值，則PLC停止工作，所有的輸出點(diǎn)均同時斷開。當(dāng)電源恢復(fù)時，若RUN輸入接通，則操作自動進(jìn)行。
對于電源線來的干擾，PLC本身具有足夠的抵制能力。如果電源干擾特別嚴(yán)重，可以安裝一個變比為1:1的隔離變壓器，以減少設(shè)備與地之間的干擾。
2.3 接地
良好的接地是保證PLC可*工作的重要條件，可以避免偶然發(fā)生的電壓沖擊危害。接地線與機(jī)器的接地端相接，基本單元接地。如果要用擴(kuò)展單元，其接地點(diǎn)應(yīng)與基本單元的接地點(diǎn)接在一起。為了抑制加在電源及輸入端、輸出端的干擾，應(yīng)給可編程控制器接上專用地線，接地點(diǎn)應(yīng)與動力設(shè)備(如電機(jī))的接地點(diǎn)分開。若達(dá)不到這種要求，也必須做到與其他設(shè)備公共接地，禁止與其他設(shè)備串聯(lián)接地。接地點(diǎn)應(yīng)盡可能*近PLC。
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廈門莫格電氣自動化有限公司
聯(lián)系人：張芳（銷售工程師）
手 機(jī)：17750626260
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