For example,the terminals or wires are not in good contact,the terminals are inconsistent with the actual signal,the input signal wires are reversely connected,loose,or fall off,and the module and the base are poorly connected,etc.Human errors such as misplacement of the DIP switch,wrong wiring direction of the communication line or unconnected terminal matcher,etc.The above problems can be eliminated,discovered and eliminated as long as daily maintenance inspections are strengthened and people’s sense of responsibility is strengthened.
如接线端或导线接触不良，接线端与实际信号不一致，输入信号线接反、松动、脱落，模块与底座接插不良等。人为的错误如将拨码开关位置放错，通信线接线方向错误或终端匹配器未接等。以上问题只要加强日常维修检查，加强人的责任心是可以杜绝、发现、消除的。
DANAHER CONTROLS BR11A6 120/60 TIMER
GE TEY 2 POLE 20 AMP 480Y/277 VAC 250 VDC
EFECTOR 100 INDUCTIVE PROXIMITY SWITCH IE5270
MITSUBISHI A1SX42 MELSEC INPUT (DC12/24 VOLT) GOOD TAKE
SIEMENS 3VF9221-1JM10 (IEC SHUNT TRIP) 240 VOLT IN
SUPER- TREX TPC WIRE & CABLE 89306 CORDSET
GE CL00-45 RT1M Starter Contactor Overload Relay ~NIB
ABB SSAC TIME DELAY RELAY TRM120A2Y120 120VAC N BOX
