HONEYWELL CC-PDOB01
现场电磁干扰是PLC控制系统中最常见也是最易影响系统可靠性的因素之一，所谓治标先治本，找出问题所在，才能提出解决问题的办法。因此必须知道现场干扰的源头。（1）干扰源及一般分类
影响PLC控制系统的干扰源，大都产生在电流或电压剧烈变化的部位，其原因是电流改变产生磁场，对设备产生电磁辐射；磁场改变产生电流，电磁高速产生电磁波。通常电磁干扰按干扰模式不同，分为共模干扰和差模干扰。共模干扰是信号对地的电位差，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）电压叠加所形成。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模件损坏率较高的主要原因），这种共模干扰可为直流，亦可为交流。差模干扰是指作用于信号两极间的干扰电压，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，这种干扰叠加在信号上，直接影响测量与控制精度。
1 F. Q7 e&＃39; |( @/ F( E) s8 X1 q( -----------------------------------------1 F. Q7 e&＃39; |( @/ F( E) s8 X1 q( ---------------
Hytrol Roller Conveyors 24"x120" - model year 2011
Antique Howe "Army-Navy" Scale
Iwaki DP Pumps Vertical Pump DPVF-2-150 w/ 3kw 200-220V...
Winsmith Speed Reducer model 930 30:1
Jordan Valve Model 60-526 Max PSI 300 Range 30-95 1"
Unipulse F360 Digital Indicator 10V
HKK Chain 35-1R SS ANSI Roller 3/8" Pitch, Rollerless, ...
Newport PM500-C Motion Controller w/ Kensington 4000-60...
Lenze 8200 Inverter E82EV551_4C200 0.55kW/0.75hp w/ PR...
AccuWeb SF-2 7210-02 Linear Actuator w/ MTR3108 Motor
Omron Sysmac PLC C200HS w/ C200HS-CPU21-E NT20S-ST121B ...
2 Newport UMR8.25 Translation Stages with 2 4&＃39; Remote C...
Fuji Electric BU37-2C Dynamic Brake Unit
GTC WS120F Right Angle Gearbox 1:700 Ratio
Berghof DC1005M Touchscreen Display Controller 5.7" QVG...
GTC WS120F Right Angle Gearbox 1:300 Ratio
Acme T2535173S Transformer 15 KVA 1P 240x480V Pri. 120/...
20 ACS Motion Control HSSI-IO16 I/O Expansion Modules f...
Allen Bradley 1769-OF8V 8-Channel Analog Output Module ...
North American H3303 Ultrasonic Edge Detector w/ Holder...
Allen Bradley 1769-IR6 Compact I/O 6-CHNL. RTD/Resistan...
Omron ZX-GTC41 Smart Sensor Controller - 24V 2M Cable
Phoenix Contact 2819312 IB IL TEMPCON UTH Inline Temper...
KLA Tencor Rotational Stage used in Vacuum Chamber
Mitsubishi QJ71E71-100 MELSEC-Q Ethernet Interface Modu...
Panasonic MINAS MBDDT2210 AC Servo Drive 200-240V 1P 40...
Apex Dynamics AE090 Planetary Gearhead 010:1 Ratio =8 ...
Acme T2535163S Transformer 10 KVA 1PH 240X480V Pri. 120...
Convertech Air Expanding Core Chuck 12" Diameter 6" Wid...
Applied Komatsu PVD Remote Signal Distribution Board 01...
Apex Dynamics AB090-S2-P1 Gearhead 010:1 Ratio =3 ARCM...
RKI Riken Keiki GD-K7DII Gas Detector 0-75 PPM NH3
Siemens JXD63B400 400A 600V 3P Sentron Circuit Breaker ...
ABB SACE T5S Circuit Breaker 400A 600V 3P
VACON X4C40010C X4 AC Drive 1HP 460VAC 3P
Siemens Simatic S7 6ES7 326-2BF10-0AB0 Failsafe Digital...
Stober K102WGD0560MT10 Right Angle Helical/Bevel Speed ...
Fife S-22 Infrared Sensor Part# 84553-001 w/ 16&＃39; Sensor...
National Instruments PCI-6722 Static and Waveform Analo...
Stober P522SPR0700MT ServoFit Precision Gearhead Ratio ...
Allen Bradley 1794-IRT8 Flex I/O 8-Pt. RTD/Thermocoupl?e...
ABB ACS350-03U-1***6?-4 General Machinery Drives 10HP - A...
Mitsubishi MR-MQ100 Single Axis Motion Controller
Tolomatic MXP40 Linear Actuator
Yaskawa JUSP-ACP15GA SERVOPACK Multi Axis Drive/Convert..?.
Watt W5TP4V060-24J Thyristor SCR Power Regulator 3P - O...
Nireco PH16B Infrared Edge Sensor Photohead
Square-D LHL363501212 Circuit Breaker 240/480/600V 350A...
Montalvo SN90-25 90mm Cantilever Load Cell - 350mm Roll...
Yaskawa Servopack CACR-PR03AC3BR AC Servo-Drive 200V
Asyst CMSII 9700-5819-01 3 Channel Fan Controller with ...
Honeywell UDA2182-PH1-CC2?-C3-N-0000 Multiple Input Anal...
