MT200MT200

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。

Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Yaskawa Electric SGMRS-06A2B-YR11 Tested in Good Condition Fast Ship
Pre-Owned
   10  077  35
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New MITSUBISHI AC Servo Mmotor HC153S-E51 Fast Ship
Brand New
   10  077  21
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW Mitsubishi Servo Motor HC-RF203S-S2 Fast Ship
Brand New
   10  077  21
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    IC693CPU364 IC693CPU364 GE Tested in Good Condition Fast Ship
Pre-Owned
   10  077  21
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    FANUC A20B-1000-0802/03A Tested in Good condition
Pre-Owned
   10  066  93
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Fanuc A06B-6078-H211#H500 Spindle Amplifier In Good Condition
Pre-Owned
   10  064  08
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New Siemens positioner 6DR5020-0NN00-0AA0 Fast Ship
Brand New
   10  063  31
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand New GE FANUC PLC IC693CMM321-JJ Fast Ship
Brand New
   10  058  52
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand New Mitsubishi GT2310-VTBD In Box Fast Ship
Brand New
   10  053  86
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Siemens 6RA2425-6DS22-0 Tested in Good condition
Pre-Owned
   10  053  72
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Fanuc A06B-0764-B190 Tested in Good condition
Pre-Owned
   10  053  03
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand NEW Mitsubishi HG-KR43BJ+MR-J4-40A Fast Ship
Brand New
   10  052  19
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Siemens 6ES5 095-8FB01 Tested in Good condition Fast Ship
Pre-Owned
   10  051  92
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New SQM45  291A9WH Fast Ship
Brand New
   10  047  75
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Yaskawa CPS-420F Robot Power Supply In Good Condition Fast Ship
Pre-Owned
   10  047  12
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW Yaskawa SGMAH-01AAA41+SGDM-01ADA Fast Ship
Brand New
   10  046  08
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW HF154T-A48 MITSUBISHI SERVO MOTOR
Brand New
   10  045  38
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New Panasonic servo motor MHMA152P1G Fast Ship
Brand New
   10  042  46
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand NEW IN BOX Siemens 7MF4020-1EA00-1AA3-Z Fast ship with warranty
Brand New
   10  041  21
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New OMRON F3SJ-A0320N30 Fast Ship
Brand New
   10  040  93
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    FANUC A05B-2502-C400 Tested It In Good Condition
Pre-Owned
   10  039  82
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Asa5520-Bun-K9 Firewall Cisco Plc Module Tested in Good condition
Pre-Owned
   10  039  13
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Fanuc A06B-6140-H015 Tested in Good condition
Pre-Owned
   10  036  35
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand New SIEMENS 7ML5033-2BA00-1A Fast ship with warranty
Brand New
   10  032  87
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    ABB frequency converter 37KW 380V ACS510-01-072A-4
   10  032  18
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Mitsubishi A68DAI NEW IN BOX Fast ship with warranty
Brand New
   10  032  18
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    SIEMENS 6SN1123-1AA00-0BA1+6SN1118-0AA11-0AA1 Fast Ship
Pre-Owned
   10  025  44
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New VT5-W07 KEYENCE VT5W07 Fast Ship
Brand New
   10  025  23
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW KEYENCE KV-7500 Fast Ship
Brand New
   10  021  61
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Yasukawa direct drive motor DD motor SGMCS-10C3C11 Fast Ship
Pre-Owned
   10  018  28
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand NEW IN BOX Siemens 6SX7005-0AC00 Fast ship with warranty
Brand New
   10  018  28
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS Brand New Mitsubishi Servo Motor HC-SFS502K Fast Ship
Brand New
   10  014  73
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New Panasonic AC Servo Motor MDMA302P1G Fast Ship
Brand New
   10  014  66
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW IN BOX Mitsubishi servo motor HC-SF81B Fast Ship
Brand New
   10  014  32
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New ABB AZ20/112112231111100C/STD Fast ship with warranty
Brand New
   10  011  33
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    FANUC A06B-0061-B203#0100 Tested in Good Condition Fast Ship
Pre-Owned
   10  009  73
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Fanuc A20B-8100-0980 Tested in Good condition
Pre-Owned
   10  008  55
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    ABB DAI03 Tested in Good Condition Fast Ship
Pre-Owned
   10  008  13
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New Ziehl-abegg RE22P-2DK  3F  5R Cooling Fan Fast Ship
Brand New
   10  007  85
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS NEW Mitsubishi Servo Motor HF-SP301K Fast Ship
Brand New
   10  007  71
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New Panasonic AC Servo MHMA052P1G Fast Ship
Brand New
   10  007  71
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS New YASKAWA JAMSC-B1062 Fast Ship
Brand New
   10  007  71
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    Yaskawa servo motor SGMRS-55A2A-YR21 Tested in Good Condition
Pre-Owned
   10  007  16
  
Free Shipping
 Watch
From Hong Kong
Get fast shipping and excellent service when you buy from    Top-rated sellers
Item image
1PCS    FANUC A06B-6114-H210 Tested in Good condition
Pre-Owned
   10  004  38