PL6-AGC1PL6-AGC1

PL6-AGC1PL6-AGC1

1.概述
  隨著科學(xué)技術(shù)的發(fā)展，PLC在工業(yè)控制中的應(yīng)用越來(lái)越廣泛。PLC控制系統(tǒng)的可靠性直接影響到工業(yè)企業(yè)的安全生產(chǎn)和經(jīng)濟(jì)運(yùn)行，系統(tǒng)的抗干擾能力是關(guān)系到整個(gè)系統(tǒng)可靠運(yùn)行的關(guān)鍵。自動(dòng)化系統(tǒng)中所使用的各種類型PLC，有的是集中安裝在控制室，有的是安裝在生產(chǎn)現(xiàn)場(chǎng)和各電機(jī)設(shè)備上，它們大多處在強(qiáng)電電路和強(qiáng)電設(shè)備所形成的惡劣電磁環(huán)境中。要提高PLC控制系統(tǒng)可靠性，設(shè)計(jì)人員只有預(yù)先了解各種干擾才能有效保證系統(tǒng)可靠運(yùn)行。

  2.電磁干擾源及對(duì)系統(tǒng)的干擾是什么？

  影響PLC控制系統(tǒng)的干擾源于一般影響工業(yè)控制設(shè)備的干擾源一樣，大都產(chǎn)生在電流或電壓劇烈變化的部位，這些電荷劇烈移動(dòng)的部位就是噪聲源，即干擾源。

  干擾類型通常按干擾產(chǎn)生的原因、噪聲的干擾模式和噪聲的波形性質(zhì)的不同劃分。其中：按噪聲產(chǎn)生的原因不同，分為放電噪聲、浪涌噪聲、高頻振蕩噪聲等；按噪聲的波形、性質(zhì)不同，分為持續(xù)噪聲、偶發(fā)噪聲等；按聲音干擾模式不同，分為共模干擾和差模干擾。共模干擾和差模干擾是一種比較常用的分類方法。共模干擾是信號(hào)對(duì)地面的電位差，主要由電網(wǎng)串入、地電位差及空間電磁輻射在信號(hào)線上感應(yīng)的共態(tài)（同方向）電壓送加所形成。共模電壓有時(shí)較大，特別是采用隔離性能差的電器供電室，變送器輸出信號(hào)的共模電壓普遍較高，有的可高達(dá)130V以上。共模電壓通過(guò)不對(duì)稱電路可轉(zhuǎn)換成差模電壓，直接影響測(cè)控信號(hào)，造成元器件損壞（這就是一些系統(tǒng)I/O模件損壞率較高的原因），這種共模干擾可為直流、亦可為交流。差模干擾是指用于信號(hào)兩極間得干擾電壓，主要由空間電磁場(chǎng)在信號(hào)間耦合感應(yīng)及由不平衡電路轉(zhuǎn)換共模干擾所形成的電壓，這種讓直接疊加在信號(hào)上，直接影響測(cè)量與控制精度。

Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Allen Bradley 1397-MB014 Motor Blower Starter 1379-5  20 10HP
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Allen Bradley 836T-T253JX86X9 Pressure Switch Series A
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Unbranded Packing Gland for Peerless Pump Co   Pump
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Piller 48  2  196 Battery PC 600 Rack Module
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Piller 48  2  196 Motor PC 500 Rack Module
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Piller 48  2  196 Generator PC 400 Rack Module
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Scott Specialty Gases 51218A590 Model 8100 Single Station Manifold
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Valvtechnologies B8L1-SW-STD Size 2 Ball Valve
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Yaskawa CMPF-PM33CE Motionpack-33 Programmer Teach Pendant
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Xycom XVME-957 VMEbus Mass Storage Sub-System 70957-005
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Xycom XVME-957 VMEbus Mass Storage Sub-System
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Marposs / TE 73340002 B-00 Backplane Socket Board
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   System Controls   Inc   S-C5010-G Power Supply Assembly
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Custom Control Sensors   Inc   640GBG2 Pressure Switch
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Sames GMN100B Powder Coating Gun Power Supply
Pre-Owned
   1  563  73
  
Free Shipping
6 Watching
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Dresser Rand 125305-29 Labyrinth Ring 1608707 (34884)
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Neundorfer 81700-121 Interface Board MR-A02 Rev   C
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Square D Q2L3225 Circuit Breaker 225 Amps 240VAC
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Ariel B-1478 Compressor Piston Nut 3-1/4 O  D     JGJ:RJ
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   CSR Contraves 709107 Motion 80 Servo Control Board Model B
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Square D FH36100G I-Line Shunt Trip Circuit Breaker 100 Amps 600VAC
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW MRC 5313MFF STEEL/C3/ABEC-1 Sealed Double Row Angular Contact Bearing
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Schneider TSX P57202 Premium Processor w/ Memory Card & PCMCIA PV:04 RL:02
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Bailey Controls 6637864A1 Control Board
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Neundorfer 81700-121 Control Board MR-A02 Rev   C
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Bauer Controls B05-0300 12 Slot Backplane Board Rev   A
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW SNR 33024 Tapered Roller Bearing 33024  V  C12
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Westinghouse C011H1111N Type C0-11 Overcurrent Relay Module 265C047A07
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW Lincoln 84776 SL-1 Replacement Stainless Steel Grease Injector
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   NWL Transformers Inc   D20800 Control Board
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Allen Bradley 1756-IF4FX0F2F/A ControlLogix Fast Analog Combo Module Rv B04
Pre-Owned
   1  563  73
Was:  Previous Price   3  822  44
  
Free Shipping
59% off
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
   Micom MI163 Welding Power Supply Interface Board MI163/2 V2
Pre-Owned
   1  563  73
  
Free Shipping
 Watch
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
NEW ASCO 068100 Solenoid Valve Rebuild Kit
   1  563  73