AL132 AL132A STO0982E01 ALSTOM

ABB 23AA20 1KGT004100R5101
ABB 560CMU02 1KGT012600R0001
ABB 23BE23 1KGT012200R5001
ABB 23BA20D GSNE000700R5312
ABB FI830F 3BDH000032R1 AC800F
ABB DO801 3BSE020510R1
ABB XV C904A 101 3BHE015412R0101 XVC904A101
AC800 DO820,DO820 3BSE008514R1,DO810
ABB PM802F 3BDH000002R1
ABB IMFEC12

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描述

一般PLC是可以直接将指令发到控制回路里,但也可能先由继电器中转。打个比方,如果你PLC的输出口带电是24VDC的,但是你的控制回路里画的图需要PLC供的节点却是220VAC的,那么你就必须在PLC输出口加上一个继电器,即指令发出时继电器动作,但后让控制回路的节点接到继电器的常开或常闭点上。也是根据情况选择是否使用继电器。

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