PS416-POW-410
PS416-POW-410
PS416-POW-410
现场电磁干扰是PLC控制系统中常见也是易影响系统可靠性的因素,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。
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Allen Bradley Contactor 100-C09Z*10 Series A
Allen Bradley 100-C30D*00 Series C Contactor
ALLEN BRADLEY 100-FPTB180 USPP 100FPTB180
ALLEN BRADLEY 100-C30A00 NSFP 100C30A00
ALLEN BRADLEY 100-M05NZ2431 NSFP 100M05NZ2431
ALLEN BRADLEY 100-M09NZ243 NSFP 100M09NZ243
Allen Bradley 100-C23Z*10 Contactor 3-Pole 100C23Z10
NEW IN BOX ALLEN BRADLEY # 100-A09ND3 AC CONTACTOR
Allen Bradley contactors Starters 100-A24ND3 100-A30N
ALLEN BRADLEY 100-C09DJ22 REVERSING CONTACTOR 24 VDC
100C09DJ400 NEW ALLEN BRADLEY 100 C09DJ400 FREE SHIP
ALLEN BRADLEY 100-FPTB30 USPP 100FPTB30
ALLEN BRADLEY 100-A12NZ243 NSFP 100A12NZ243
ALLEN BRADLEY 100-C16A10 USPP 100C16A10
ALLEN BRADLEY 100-C16J10 USPP 100C16J10
ALLEN BRADLEY 100-C16KF10 USPP 100C16KF10
ALLEN BRADLEY 100-C16N10 USPP 100C16N10
ALLEN BRADLEY 100-C16UD10 USPP 100C16UD10
ALLEN BRADLEY 100-A38N*3 CONTACTOR 240VAC COIL W/AUX
Allen Bradley Lot of 100 Asst
Allen Bradley 100-C16KY10 Contactor 3pole 48V
ALLEN BRADLEY 100-A09NZ2431 NSFP 100A09NZ2431
ALLEN BRADLEY 100-A18NZ243 USPP 100A18NZ243
100A09NZ243 NEW ALLEN BRADLEY 100 A09NZ243 FREE SHIP
ALLEN BRADLEY 100-A09NB3 USPP 100A09NB3
Allen Bradley 100-C37*00 100C37*00 Contactor 600V Max
ALLEN BRADLEY 100-C37-00/100-C37*00 CONTACTOR
Allen Bradley 100-C12DJ10 Contactor NIB
NIB ALLEN BRADLEY 1492-CB3H100 CIRCUIT BREAKER
ALLEN BRADLEY 1492-CB3H100 10A CIRCUIT BREAKER NIB
ALLEN BRADLEY 100-A12NL3 USPP 100A12NL3
ALLEN BRADLEY 100-C12F01 NSPP 100C12F01
ALLEN BRADLEY 100-C12KJ01 NSPP 100C12KJ01
ALLEN BRADLEY 100-C12Y10 NSPP 100C12Y10
ALLEN BRADLEY 100-C12D10 USPP 100C12D10
ALLEN BRADLEY 100-C09ZD10 NSFP 100C09ZD10
100M05NZ2431S NEW ALLEN BRADLEY 100 M05NZ2431S
ALLEN BRADLEY 100-A09NA03 NSPP 100A09NA03
ALLEN BRADLEY 100-A18NH3 USPP 100A18NH3
ALLEN BRADLEY 100-C09UDJ10 NSFP 100C09UDJ10
ALLEN BRADLEY 100-M09NZ-31 USPP 100M09NZ31
ALLEN BRADLEY 3A100 NSPP 3A100
ALLEN BRADLEY CONTACTOR 100-C12Z*10 SERIES A NOS
ALLEN BRADLEY 100S-F B 31 AND 700-CF31OD* A
NEW ALLEN BRADLEY 1492-CB2G100
ALLEN BRADLEY 100-A09NZ243 CONTACTOR 100A09NZ243
ALLEN BRADLEY 100-C12D200 32A CONTACTOR 120V COIL
Allen Bradley 100-C60*00, 100-C60D00, Contactor
ALLEN BRADLEY 700-CF310D* A AND 100S-F B
ALLEN BRADLEY 100-C09DJ10 SER.A NEW NO BOX
ALLEN BRADLEY 100L01
Allen Bradley - 100-A18ND8
ALLEN BRADLEY 100-A09ND3 STARTER CONTACTOR 120VAC
Allen Bradley 100-A12ND3
NEW ALLEN BRADLEY 100-A09ND3 SER. B CONTACTOR RELAY
Allen-Bradley 100-C12ZJ10 Contactor
ALLEN BRADLEY CIRCUIT BREAKER 1492-CB2G100 10 AMP NIB
ALLEN BRADLEY CONTACTOR 100-A09NZ3 SER B
NIB ALLEN BRADLEY 1492-CB2G100 1492CB2G100 10A BREAKER
ALLEN BRADLEY 100-C16 10 WITH100S-F WITH 100-PSC280
Allen Bradley 100-A38N*3 Contactor 100A38N*3 USED