品牌:GE/通用电气
起订:1件
供应:100件
发货:3天内
信息标签:IC694BEM331,供应,电子、电工,工控系统及装备
IC694BEM331PULSTEC WOBBLE/LPP-MEAS BOARD OPA-0N0-00
PULSTEC WRITE SAMPLE 2 BOARD OPA-0J2-00
IC694BEM331LEITZ WETZLAR LENS ∞/0 PL FLUTAR 20X/0.45 D
我们的目标不是赚更多的钱,是让您找到品质好,称心如意的备品备件,让您无后顾之忧赚取财富的同时得到我们应有的回报,互惠互利!真诚合作,共赢发展!诚信合作,共同富裕!
用周到的服务换取您的满意,这样的企业才会有美好光明的未来!
相信我们的质量,相信您自己的眼光!我司坚持互利共赢的开放战略!
IC694BEM331控制系统中干扰及其来源
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。
IC694BEM331(2)PLC系统中干扰的主要来源及途径
强电干扰
PLC系统的正常供电电源均由电网供电。由于电网覆盖范围广,它将受到所有空间电磁干扰而在线路上感应电压。尤其是电网内部的变化,刀开关操作浪涌、大型电力设备起停、交直流传动装置引起的谐波、电网短路暂态冲击等,都通过输电线路传到电源原边。
柜内干扰
控制柜内的高压电器,大的电感性负载,混乱的布线都容易对PLC造成一定程度的干扰。
来自信号线引入的干扰
与PLC控制系统连接的各类信号传输线,除了传输有效的各类信息之外,总会有外部干扰信号侵入。此干扰主要有两种途径:一是通过变送器供电电源或共用信号仪表的供电电源串入的电网干扰,这往往被忽视;二是信号线受空间电磁辐射感应的干扰,即信号线上的外部感应干扰,这是很严重的。由信号引入干扰会引起I/O信号工作异常和测量精度大大降低,严重时将引起元器件损伤。
来自接地系统混乱时的干扰
接地是提高电子设备电磁兼容性(EMC)的有效手段之一。正确的接地,既能抑制电磁干扰的影响,又能抑制设备向外发出干扰;而错误的接地,反而会引入严重的干扰信号,使PLC系统将无法正常工作。
来自PLC系统内部的干扰
主要由系统内部元器件及电路间的相互电磁辐射产生,如逻辑电路相互辐射及其对模拟电路的影响,模拟地与逻辑地的相互影响及元器件间的相互不匹配使用等。
变频器干扰
一是变频器启动及运行过程中产生谐波对电网产生传导干扰,引起电网电压畸变,影响电网的供电质量;二是变频器的输出会产生较强的电磁辐射干扰,影响周边设备的正常工作。
3.主要抗干扰措施
(1)电源的合理处理,抑制电网引入的干扰
对于电源引入的电网干扰可以安装一台带屏蔽层的变比为1:1的隔离变压器,以减少设备与地之间的干扰,PULSTEC WOBBLE/LPP-MEAS BOARD OPA-0N0-00
PULSTEC WRITE SAMPLE 2 BOARD OPA-0J2-00
LEITZ WETZLAR LENS ∞/0 PL FLUTAR 20X/0.45 D
SOC SHOWA OPTRONICS GLP3110,REMOTE CONTROLLER
SUNHAYATO DIN-176E BOARD
971002-POWER2 BOARD
WESTINGHOUSE INPUT NL-1017 16 BIT REGISTER
MMT MICRO MOTION TECHNOLOGY T1-611
RKC INSTRUMENT COM-A NNB
FUJIKIN INCORPORATED O.P 4~6kgf/cmG 0.39~0.59MPa,TY?PE-NC,210K FUJIKIN 316L-P
X.Y.Z. STAGE
JL601 MOTOR-MLC REV.1.0 BOARD
JL601 RELAY BLOCK REV.1.0 MODEL:ADC BOARD
JL601 RELAY BLOCK REV.1.0 MODEL:GND BOARD
JL601 RELAY BLOCK REV.1.0 MODEL:UB2-LDD BOARD
FUJI ELECTRIC FVR.C9S INVERTER FVRO 1C9S-6
SCHNEIDER ELECTRIC PHASEO ABL4WSR24200
INTERFACE AZI-132,K/866/2?-001[12] BOARD
TECHNOLOGY 80 INC MODEL: 5641 5641B 901124/F BOARD #800113C ASSY
THK 180MM ACTUATOR KR S/N A2F1229
LLT2 PCI BOARD '97.05 PRECISION DIGITAL CORP.#1
APPLIED MATERIALS OPTO DETECT BOARD 0100-00014 0110-00014 REV H REV D BROKEN
API CONTROLS DS-3402d-E-C107 DRIVE
SMC CY3R15-150 CYL, RODLESS, MAG. COUPLED,FUII MODEL CY3R15-150-M9B
ORIENTAL VEXTA DRIVER ASD12A-C
VEXTA ORIENTAL 2-PHASE STEPPING MOTOR PH264M-31B LOT OF 2
TOKYO SEIMITS FA0134 LD.IO-1
TOKYO SEIMITSU FA0135C VME MVME
TOKYO SEIMITSU FA0139B BOARD VME MVME
KLA INSTRUMENTS ASSY 700-608019-00 REV:BD VME MVME
AVAL DATA AVME-115B MPU-05B
TOKYO RKC TEMPERATURE CONTROLLER REX-F900,900FD0?4-V*GN-NN5-NA
HP BOARD 54602-66502 REV A
RKC REX-F900 F900W801-VV*AB-?NN5-5N. TEMPERATURE CONTROLLER
RKC REX-F900 F900FD12-V*AB-N?N5-5N TEMPERATURE CONTROLLER
RKC REX-F900 F900FP04-V*CD-N?N5-5N TEMPERATURE CONTROLLER #1
HP BOARD 06033-60020,PC-?P-86-94V0 06
ORIENTAL VEXTA 5-PHASE DRIVER UDK5214NW-M
ORIENTAL VEXTA 5-PHASE DRIVER UDK5114NW2-M
DRESSLER CESAR 2720 45000058
Samsung FARA N-700 PLC DC Input 32P CPL73024 LOT OF 3
OMRON G700-EOD32 REMOTE TERMINAL PLC LOT OF 2
ACROMAG INTELLPACK DUAL ALARM 822A-0200 LOT OF 3
OMRON POWER SUPPLY S82S-7728 NEW IN BOX
OMRON POWER SUPPLY S8TS-03012 NEW IN BOX
MG2406E1-SGL,D4?1495 REV A,WAYTON M.I.T PC-2406E2 BOARD
KEMA KEUR POWER SUPPLY SPD14-2410P
F65 WKS MB,E.F.634.5/2d 90.27 BOARD
SIEMENS 6ES7-921-3AA20??-0AA0 CONNECTOR LOT OF 3 NEW
OMRON SOLID STATE RELAY G3PA-210B-VD, CYCLE CONTROL UNIT G32A-EA LOT OF 2
OMRON SOLID STATE RELAY G3PB-245B-VD NEW NOT IN BOX LOT OF 2
HP RAD BOARD 01018-66503 D 3001
BULGIN-SOURCE SAX51-01 POWER SUPPLY
STEC INC PAC-EC V2.2A
Samsung FARA N-700 PLC RELAY OUTPUT 32P CPL73104,WIRE
TAMAGAWA SEIKI 5PHASE STEPPING MOTOR 2K-S544W
STEC INC PAC-EC V2.2A CONTROLLER
PRESSURE TRANSMITTER TYPE ZT15 RANGE 0~0.5MPa POWER 24V DC LOT OF 5
FUJI ELECTRIC FA,AUTO BREAKER EA33AC 10A, 20A, 30A NEW LOT OF 3
FUJI ELECTRIC FA,AUTO BREAKER EA32AC 5A NEW LOT OF 3
FUJI ELECTRIC FA,AUTO BREAKER EA53C 10A NEW LOT OF 3
FUJI ELECTRIC FA,AUTO BREAKER EA32AC 10A NEW LOT OF 3
ORIENTAL VEXTA 5-PHASE DRIVER UDK5128NW2
KLA BASEPLATE FLEX BOARD,710-65020?1-20 REV C0
MYCOM UPS52-130 SERVO DRIVE
FUJI ELECTRIC FVR.C9S INVERTER FVRO 1C9S-2
ORIENTAL MOTOR VEXTA AC SERVO DRIVER B2032-0775AIP
ORIENTAL MOTOR VEXTA AC SERVO DRIVER B1747-0775AIP
GENUS,INC.ANALO?G INTERFACE BOARD PCA 24399-00,PCB 24400-00,SCH 24402-00,MP 24401
VEXTA,ORIENTAL,?HARMONIC GEARED STEPPING MOTOR,DRIVER,CS?D5807N-P,PH544H?G1-NB-A2
VEXTA,ORIENTAL,?HARMONIC GEARED STEPPING MOTOR,DRIVER,CS?D5807N-P,C7601-?90215HGE
VEXTA,ORIENTAL,?HARMONIC GEARED STEPPING MOTOR,DRIVER,CS?D5814N-P PH533HG1-NA
MELEC PM DRIVER D-240
ORIENTAL VEXTA DRIVER ASD16A-C
FUJI ELECTRIC FVR.E7S INVERTER FVR004E7S-2
VME-AXIS REV.001-00 AXIS-H3 SAMSUNG AEROSPACE
SNT-T6HB PSB-9401 DIO(ISL) BOARD D-00098
KLOCKNER MOELLER DIL 3M80,DIL M 820-XH1 FREE SHIPPING
YASKAWA BOARD JARCR-XCU03,HE9?303370 REV AO
WESTINGHOUSE 16 BIT REGISTER OUTPUT MODULE NL-1018
VEXTA AC SERVO MOTOR B1761-D21AIPM
PACIFIC SCIENTIFIC MOTOR P22NSXA-LDN-NS-?02
RSF ELEKTRONIK ENCODER MS 50.84M, NEW
HILSCHER GMBH DeviceNet CIF50,BSL-DNM,V?1.5 BOARD
TEWS DATEN TECHNIK TIP866-TM-20,XM?.OCTAL.6U-RJ8,T?M8660318,REV A,VER 1.0 BOARD
TOKYO ELCTRON LIMITED TEL TVB6004-1 QMC3 AXIS BOARD
ILFA BOARD CONVAC CSC1A BS TEMP -A3,46724
MOXA OPT8A 8 PORTS RS-232 CONNECTION BOX NEW IN BOX
PULSTEC LD-I/F-K OPA-22B-00 BOARD