PCD6.A400

 PCD6.A400**类是来自电源的干扰。实践证明，因电源引入的干扰造成PLC控制系统故障的情况很多，一般通过加稳压器等设备解决。

　　第二类是来自信号线引入的干扰。此干扰主要有两种信息途径:一是通过变送器供电电源或共用信号仪表的供电电源串入的电网干扰，这往往被忽视;二是信号线受空间电磁辐射感应的干扰，即信号线上的外部感应干扰，这种干扰往往非常严重。

　　由信号引入的干扰会引起I/0信号工作异常和测量精度大大降低，严重时将引起元器件损伤。对于隔离性能差的系统，还将导致信号间互相干扰，引起共地系统总线回流，造成逻辑数据变化、误动和死机。PLC控制系统因信号引入干扰造成I/O模件损坏数相当严重，由此引起系统故障的情况也很多。此种干扰经常发生于信号距离长的龙门吊上，常采用加中继隔离的方法，来屏蔽掉感应电压，解决干扰问题。BRAD HARRISON 41311 600V 8A 5 PIN MINI ConNECTOR NEW

 

TPC WIRE & CABLE 84700 SUPER-TREX QUICK-ConNECT FEMALE RECEPTACLE CABLE 48" LEAD

 

BRAD HARRISON QUICK-DISConNECT SYSTEMS MIRCO-CHANGE MOLDED ConNECTOR 80256

 

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HUBBELL HBL5261 NEW 15A 125V OUTLET HBL5261

 

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ALLEN BRADLEY 77135-146-52 MEMORY CARD RETAINER KIT

 

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Allen Bradley 1771-CP1 Power Supply Cable

 

MODICON 170-XTS-042-00 170TS04200 MOMENTUM

 

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LOT OF 2 NEW GENERAL ELECTRIC OVERLOAD THERMAL HEATER CR123F35.7B CR123F357B

 

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PILZ PN12-PNP PROXIMITY SENSOR PN12PNP  13-27V-

 

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ALLEN BRADLEY 1746-RL51 OCTAL LABEL KIT FOR 1746-OB16 1746RL51

 

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ALLEN-BRADLEY 30HP AC DRIVE  1336S-B030-AN-EN-L6  SER. D 460V 3PH 36KVA

 

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FINCOR DC ADJUSTABLE SPEED DRIVE 150 HP 3123M SIX-SCR DC MOTOR CONTROL

 

*NEW* SIEMENS SERVOMOTOR 1FT6041-4AF71-4FB1

 

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HEIDENHAIN RON 705 B 18000  Incremental Hollow Shaft Rotary Encoder

 

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Asco Red-Hat II 3/8" Solenoid Valve 8263G333 120V

 

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SIEMENS NET COMMUNICATION PROCESSOR MODULE 6GK7343-1HX00 6GK7 343-1HX00-0E0

 

ALLEN BRADLEY 800MR-P16S PILOT LIGHT

 

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ALLEN BRADLEY 800T-H51 SELECTOR SWITCH 800TH51

 

ALLEN BRADLEY 800MR-HK2B SELECTOR SWITCH  800MRHK2B

 

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