描述
屏蔽层、接地线和大地有可能构成闭合环路，在变化磁场的作用下，屏蔽层内有会出现感应电流，通过屏蔽层与芯线之间的耦合，干扰信号回路。若系统地与其它接地处理混乱，所产生的地环流可能在地线上产生不等电位分布，影响PLC内逻辑电路和模拟电路的正常工作。PLC工作的逻辑电压干扰容限较低，逻辑地电位的分布干扰容易影响PLC的逻辑运算和数据存储，造成数据混乱、程序跑飞或死机。模拟地电位的分布将导致测量精度下降，引起对信号测控的严重失真和误动作。
SMC Thermo-Con Power Supply INR-244-230W
SMC THERMO-CON INR-244-639 TEMPERATURE CONTROLLER NEW
TEL ACT 12 SMC Thermo-Con Power Supply INR-244-230W
Tokyo Electron SMC Thermo-Con Controller INR-244-218E
CIRCULATOR, 412 200W COAT SMC 2-39-53863 INR-244-412
SMC Thermo-Con ACT 12 Tokyo Electron INR-244-244U-670
Tokyo Electron ACT 12 SMC Thermo-Con Cool INR-244-215W
SMC Thermo-Con Water-Cooled Heater INR-244-602
SMC CONTROLLER, MULTI INR, THERMO CON INR-244-110E
KLA-Tencor 471-50620-000 SMC Chiller INR-244-626B Used
KLA-Tencor 471-50620-000 SMC Chiller INR-244-626B Used
Tokyo Electron ACT12 Interface Plate SMC INR-244-233B
SMC TEL ACT 8 Power Supply INR-244-217B working
SHINKO DENSEN PLATE, COOLING MARK 7/8 INR-244-125A
