1785-L80C 1785-L80C
參考價 | ¥ 10 |
訂貨量 | ≥1 |
- 公司名稱 廈門仲鑫航自動化設(shè)備有限公司
- 品牌
- 型號 1785-L80C
- 產(chǎn)地 美國
- 廠商性質(zhì) 經(jīng)銷商
- 更新時間 2017/6/18 10:58:09
- 訪問次數(shù) 398
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1785-L80C 1785-L80C
電源回路 PLC供電電源一般為 AC85—240V(也有DC24V),適應(yīng)電源范圍較寬,但為了抗干擾,應(yīng)加裝電源凈化元件(如電源濾波器、1:1隔離變壓器等)。
2、PLC上DC24V電源的使用各公司 PLC產(chǎn)品上一般都有DC24V電源,但該電源容量小,為幾十毫安至幾百毫安,用其帶負載時要注意容量,同時作好防短路措施(因為該電源的過載或短路都將影響PLC的運行)。
3、外部DC24V電源 若輸入回路有 DC24V供電的接近開關(guān)、光電開關(guān)等,而PLC上DC24V電源容量不夠時,要從外部提供DC24V電源;但該電源的“—”端不要與 PLC的 DC24V的“—”端以及“COM”端相連,否則會影響PLC的運行。
4、輸入的靈敏度各廠家對PLC的輸人端電壓和電流都有規(guī)定,如日本三菱公司F7n系列PLC的輸入值為:DC24V、7mA,啟動電流為4.5mA,關(guān)斷電流小于1.5mA,因此,當(dāng)輸入回路串有二極管或電阻(不能*啟動),或者有并聯(lián)電阻或有漏電流時(不能*切斷),就會有誤動作,靈敏度下降,對此應(yīng)采取措施。另一方面,當(dāng)輸入器件的輸入電流大于PLC的zui大輸入電流時,也會引起誤動作,應(yīng)采用弱電流的輸入器件,并且選用輸人為共漏型輸入的 PLC,Bp輸入元件的公共點電位相對為負,電流是流出 PLC的輸入端。
6FX5008-1BA41-1FA0 POWER CABLE,BY METER,MC500,50M Siemens
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