3HAC13389-2-DSQC611 输入电流

SR469-P1-HI-A20-T-H
SR745-W2-P5-G5-HI-A
1769-L32E
IC755CSS12CDB
2711P-T10C4A8
1746SC-NI8U
3HAB8101-4/05A-DSQC345D
MVI56-GEC
A06B-6200-H037
MDG-M2S100N 20W 100V POLES:2 50HZ/60HZ

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描述

输入的灵敏度各厂家对PLC的输人端电压和电流都有规定,如日本三菱公司F7n系列PLC的输入值为:DC24V、7mA,启动电流为4.5mA,关断电流小于1.5mA,因此,当输入回路串有二极管或电阻(不能完全启动),或者有并联电阻或有漏电流时(不能完全切断),就会有误动作,灵敏度下降,对此应采取措施。另一方面,当输入器件的输入电流大于PLC的最大输入电流时,也会引起误动作,应采用弱电流的输入器件,并且选用输人为共漏型输入的PLC,Bp输入元件的公共点电位相对为负,电流是流出PLC的输入端。

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