Description
输入监视器检查。当输入LED不亮时，可初步确定是外部输入系统故障，再配合万用表检查。如果输出电压不正常，就可确定是输入单元故障。当LED亮而内部监视器无显示时，则可认为是输入单元、CPU单元或扩展单元的故障。
NEW GENERAL ELECTRIC IC3606SIFA9B IC3606SIFA9 NEW
NEW GENERAL ELECTRIC IC3606SIFA9 NEW IN BOX
NEW BAILEY CONTROLS NLSM-02 NLSM02 loop storage 90
Omron Interactive Display Oper Interface NT600M-DT122
New Allen Bradley Magnetic Overload Relay 810-A03A NIB
New in box FOXBORO SUMMER 2AX+SUM STD 2AXSUM
