621-3580RC

621-3580RC

621-3580RC

1.概述
  随着科学技术的发展，PLC在工业控制中的应用越来越广泛。PLC控制系统的可靠性直接影响到工业企业的安全生产和经济运行，系统的抗干扰能力是关系到整个系统可靠运行的关键。自动化系统中所使用的各种类型PLC，有的是集中安装在控制室，有的是安装在生产现场和各电机设备上，它们大多处在强电电路和强电设备所形成的恶劣电磁环境中。要提高PLC控制系统可靠性，设计人员只有预先了解各种干扰才能有效保证系统可靠运行。

  2.电磁干扰源及对系统的干扰是什么？

  影响PLC控制系统的干扰源于一般影响工业控制设备的干扰源一样，大都产生在电流或电压剧烈变化的部位，这些电荷剧烈移动的部位就是噪声源，即干扰源。

  干扰类型通常按干扰产生的原因、噪声的干扰模式和噪声的波形性质的不同划分。其中：按噪声产生的原因不同，分为放电噪声、浪涌噪声、高频振荡噪声等；按噪声的波形、性质不同，分为持续噪声、偶发噪声等；按声音干扰模式不同，分为共模干扰和差模干扰。共模干扰和差模干扰是一种比较常用的分类方法。共模干扰是信号对地面的电位差，主要由电网串入、地电位差及空间电磁辐射在信号线上感应的共态（同方向）电压送加所形成。共模电压有时较大，特别是采用隔离性能差的电器供电室，变送器输出信号的共模电压普遍较高，有的可高达130V以上。共模电压通过不对称电路可转换成差模电压，直接影响测控信号，造成元器件损坏（这就是一些系统I/O模件损坏率较高的原因），这种共模干扰可为直流、亦可为交流。差模干扰是指用于信号两极间得干扰电压，主要由空间电磁场在信号间耦合感应及由不平衡电路转换共模干扰所形成的电压，这种让直接叠加在信号上，直接影响测量与控制精度。

优势品牌：AB 罗克韦尔、GE 通用电器、SCHNEIDER 施耐德、TRICONEX 、FOXBORO 福克斯波罗、SIEMENS 西门子、HONEYWELL 霍尼韦尔、ABB
  
 出售目的：为客户创造价值是咱们追求的方针
  
出售情绪：质量保证、诚信效劳、及时到位

  243  34 shipping
 Watch
From Turkey
Item image
KONGSBERG SIMRAD PDO-120 PDO120 INTERFACE MODULE 37759172
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
Digi SCSI 8 Port Terminal Server 1008 INT Free Express Shipping
Pre-Owned
   1  494  81
  
Free Shipping
 Watch
From Turkey
Item image
Siemens 6es7 340-1ch02-0ae0 6ES7 340-1CH02-0AE0 PLC Module Missing Cover
Pre-Owned
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
Direct Koyo FACTS ENGINEERING F2-04AD-2
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
electro flow controls aberdeen M300 Rev 1  0 01224 249355
Pre-Owned
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
Allen-Bradley 1746-HSCE (1746-HSCE) bbbbb Module
Pre-Owned
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
Direct Koyo FACTS ENGINEERING F2-04AD-2
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
Mitsubishi Melsec Programmable Controller AY81EP
Pre-Owned
   1  251  47
  
+   243  34 shipping
 Watch
From Turkey
Item image
Ge FANUC IC670MDL930J Isolated Output Module 8 Point 240v
   1  216  71
  
+   278  10 shipping
 Watch
From Turkey
Item image
MEASUREMENT TECHNOLOGY LTD MTL-3043
   1  202  80
  
+   278  10 shipping
 Watch
From Turkey
Item image
Schneider PLC TWDDMM24DRF
   1  181  94
  
+   278  10 shipping
 Watch
From Turkey
Item image
Mitsubishi Q68ADI (Q68ADI) q68adı converter unit
Pre-Owned
   1  251  47
  
+   208  58 shipping
 Watch
From Turkey
Item image
Siemens Simatic S7 Digital bbbbb 6ES7 321-1BL00-0AA0
Pre-Owned
   1  216  71
  
+   243  34 shipping
 Watch
From Turkey
Item image
Allen-Bradley 1746-1B16 SERIES C bbbbb MODULE SLC500 1746-1B16
Pre-Owned
   1  181  94
  
+   278  10 shipping
 Watch
From Turkey
Item image
Beckhoff Bk 3000 Profibus Buskoppler BK3000
Pre-Owned
   1  216  71
  
+   243  34 shipping
 Watch
From Turkey
Item image
GE Inbbbligent 8811-io-dc 8-channel Safety Discrete bbbbb Output Module
Pre-Owned
   1  147  18
  
+   312  87 shipping
 Watch
From Turkey
Item image
Camile-Bauer-Sineax-I542-Transmitter
Pre-Owned
   1  216  71
  
+   243  34 shipping
 Watch
From Turkey
Item image
Honeywell 900h32-0001 Hc900 Digital Output Module
Pre-Owned
   1  251  47
  
+   208  58 shipping
 Watch
From Turkey
Item image
EPIPHAN VGA SPLITTER 3
Pre-Owned
   1  216  71
  
+   243  34 shipping
 Watch
From Turkey
Item image
Texas Instruments 305-03dm 305-03DM Communication Module Rs232c
Pre-Owned
   1  216  71
  
+   243  34 shipping
 Watch
From Turkey
Item image
Black Box LBH150A-PD-St-24 Hardened 10/100 Mbps Corner Desk
Pre-Owned
   1  160  81
  
+   281  38 shipping
 Watch
From Turkey
Item image
BLACK BOX LBH150A-PD-St-24 Hardened 10/100mbps edge switch
Pre-Owned
   1  157  62
  
+   280  61 shipping
 Watch
From Turkey
Item image
BLACK BOX LBH150A-PD-St-24 Hardened 10/100mbps edge switch
Pre-Owned
   1  154  61
  
+   279  89 shipping
 Watch
From Turkey
Item image
Black box lbh150a-pd-st-24 hardened edge switch 10/100 mbps
Pre-Owned
   1  149  91
  
+   278  74 shipping
 Watch
From Turkey
Item image
Black box lbh150a-pd-st-24 hardened 10/100 mbps edge switch
Pre-Owned
   1  149  91
  
+   278  74 shipping
 Watch
From Turkey
Item image
Black box lbh150a-pd-st-24 Hardened 10/100 Mbps Edge Switch
Pre-Owned
   1  149  91
  
+   278  74 shipping
 Watch
From Turkey
Item image
Allen-Bradley SLC 500 1746-IB16 Ser   C bbbbb Module
Pre-Owned
   1  181  94
  
+   243  34 shipping
 Watch
From Turkey
Item image
BLACK BOX LBH150A-PD-St-24 Hardened 10/100mbps edge switch
Pre-Owned
   1  147  18
  
+   278  10 shipping
Only 1 left!
 Watch
From Turkey
Item image
bbbbbb Instruments G438-0001 Ultra Slimpak Signal Conditioner
Pre-Owned
   1  147  18
  
+   278  10 shipping
 Watch
From Turkey
Item image
Mitsubishi | FX-EEPROM-8 | Memory Module -8K
Pre-Owned
   1  147  18
  
+   278  10 shipping
 Watch
From Turkey
Item image
AUTRONICA BJH-33/EX ION SMOKE DETECTOR BJH33EX
Pre-Owned
   1  147  18
  
+   278  10 shipping
 Watch
From Turkey
Item image
American Dynamics ADQUAD77
Pre-Owned
   1  181  94
  
+   243  34 shipping
 Watch
From Turkey
Item image
Allen-Bradley 1769-OF2 Output Module
Pre-Owned
   1  181  94
  
+   243  34 shipping
 Watch
From Turkey
Item image
Siemens 6ES7 241-1CH31-0XB0
   1  112  42
  
+   278  10 shipping
 Watch
From Turkey
Item image
GE FANUC IC200MDL640H PLC bbbbb Module
Pre-Owned
   1  112  42
  
+   278  10 shipping
 Watch
From Turkey
Item image
Schneider Electric TSXRKY12EX 12 Slot Ext   Rack
Pre-Owned
   1  147  18
  
+   243  34 shipping
 Watch
From Turkey
Item image
Siemens SIMATIC S7 6ES7 334-0CE01-0AA0    ANALOG bbbbb/OUTPUT Module Free Express
Pre-Owned
   1  390  52
  
Free Shipping
 Watch
From Turkey
Item image
Dynec Model 5846 Multi-Mode bbbb / Repeater Module EIA-422/485
   1  112  42
  
+   278  10 shipping
 Watch
From Turkey
Item image
Schneider TSXPSY3610 Power Supply Module
Pre-Owned
   1  042  89
  
+   347  63 shipping
 Watch
From Turkey
Item image
Lot Of 3pcs PEPPERL FUCHS K-SYSTEM KSD2-BI-EX4 Free Express Shipping
Pre-Owned
   1  390  52
  
Free Shipping
Only 1 left!
24 Sold
 Watch
From Turkey
Item image
PEPPERL & FUCHS EGC-020 / EGC020 (RQAUS1)
   1  390  52
  
Free Shipping
 Watch
From Turkey
Item image
SRX Ace/406/HUB Audio Site Wide for PA/GA System
Pre-Owned
   1  147  18
  
+   243  34 shipping
 Watch
From Turkey
Item image
Schneider Electric Motor Protector LTMR08EBD
Pre-Owned
   1  112  42
  
+   243  34 shipping
 Watch
From Turkey
Item image
QUANTUM TC-L32BX TE8252-512 Tape Drive
Pre-Owned
   1  042  89