TRICONEX 9662-810
TRICONEX 9662-810
TRICONEX 9662-810
（5）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。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。PLC控制系统的地线包括系统地、屏蔽地、交流地和保护地等。接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均，不同接地点间存在地电位差，引起地环路电流，影响系统正常工作。例如电缆屏蔽层必须一点接地，如果电缆屏蔽层两端A、B都接地，就存在地电位差，有电流流过屏蔽层，当发生异常状态加雷击时，地线电流将更大。
此外，屏蔽层、接地线和大地有可能构成闭合环路，在变化磁场的作用下，屏蔽层内有会出现感应电流，通过屏蔽层与芯线之间的耦合，干扰信号回路。若系统地与其它接地处理混乱，所产生的地环流可能在地线上产生不等电位分布，影响PLC内逻辑电路和模拟电路的正常工作。PLC工作的逻辑电压干扰容限较低，逻辑地电位的分布干扰容易影响PLC的逻辑运算和数据存储，造成数据混乱、程序跑飞或死机。模拟地电位的分布将导致测量精度下降，引起对信号测控的严重失真和误动作。
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AMATISO. LEG 4, Master PD 102 CD 4-2 0190-A6161
TEL CONTROLLER, KOMATSU CIRCULATI CS014-000744-1
SIEMENS MICROMASTER 411 DRIVE 480V 6SE6411-6BD22-2CA1
WHITE KNIGHT FLUID HANDLING AP200 PNEUMATIC PUMP
AMAT ASSY, DISTRIBUTION PANEL, 300MM TEMP 0010-04628
AMAT HEATED PIPELINE,GIS Mnpl 0050-A0131
FUJI AMPLIFER, AC SERVO SPIN DRY 0382-0204
DNS CIRCULATOR 412 200W COAT SMC 2-39-53863 INR-244-412
ONTRAK PCB, CPU 50-003-0034
APPLIED MATERIALS (AMAT) LTS, TCB, AUTOFOUCS 8028-0148
VARIAN GATE,VLVE ASSY 45709-00 VAT 08040-FA44-AAV1/0048
AMAT BRG TO KAYDON DRG 3060-90254
TEL DISK, DELAY WAVE RSY MB3S10-350681-11
APPLIED MATERIALS (AMAT) DECEL PSU -6kV QUANTUM 2
AMAT INSERT, SLIT VALVE FOR BUFFER 0021-02747
MICRON MODEL SHOP RECIRCULATOR, NP 2008C
NSK CONTROLLER, SINGLE AXIS EXC20A330T00-04
KENSINGTON PCB, X-AXIS 9200 4000-6002
KENSINGTON PCB ARM 9200 36-4823-0005-02 9407-0748
KENSINGTON PCB ROBOT WAIST 9407-016432 36-4823-0003-02
DNS PLATE, HOT (HP) 80B ASSY 2-AE-90076
LAMBDA CONTROLLER, MEGASONIC AMPL 4259601
SHIELD, LOWER CU PENTAGON TECHNOLOGIES 0021-16287 005
AMAT VALVE, THROTTLE(METAL CNTR) 0010-09174-00
AMAT SHIELD, UPPER CU PENTAGON TECHNOLOGIES 0021-16781
TOKYO ELECT FAN, IN LINE BOOSTER CT1
AMAT CARD CONTROLLER CPCI 166MHZ PENTIUM 3U 0190-15915
MARTEQ TANK, MEG PROCESS (LMC) QUARTZ 1078064.1.8
TEL FEEDTHRU, MAGNETIC COUPLED VACUUM 024-015804-1
AMAT SHIELD, MIDDLE, 12.46 LG 300MM SIP CU 0021-16782
TEL SHIELD, DEPO Y-AL D3, PO.8, P35.6 ES3D10-101190-11
ULTRATECH INC CHUCK, POP-UP 01-15-09434
APPLIED MATERIALS (AMAT) APD CARD ASSEMBLY 0010-A0091
AMAT GDP, LINER, 43R HOLE, PHASE III, TRENCH-0021-39898
DISCO HI-TEC ASSY, 200MM END EFFECTOR RBT 02-15-05062
APPLIED MATERIALS (AMAT) 200MM FACEPLATE P/N 0040-70319
VARIAN PARTICLE, DUMP E17133880
SOKUDO CONTROLLER, ACU DEVELOPER 62421-0213 2-39-67686
DNS CONTROLLER, MAIN 700 SERIES SK2000 REP 2-VC-77871
AMAT KIT ARGON BLEED TYLAN MFC 9240-05184ITL
AMAT KIT, TROUBLESHOOT, WET ROBOT, CU, 300MM 0240-42674
AMAT KIT, TROUBLESHOOT, WET ROBOT, NON-CU 3 00240-42675
APPLIED MATERIALS (AMAT) UPPER SHOWER HEAD 0040-89773
APPLIED MATERIALS (AMAT) MAGNET DRIVER P/N 0190-16633
APPLIED MATERIALS (AMAT) NF SENSOR ASSY P/N 0620-00928
AMAT TWO CHANNEL MAGNET DRIVER SPECIFICATION 0190-16633
VARIAN PCB THERMOCOUPLE INTERFACE EATON 1522921
APPLIED MATERIALS (AMAT) PADDLE ASSY P/N 0190-03926
SEMITOOL FACILITY I/O BLOCK BRD P/N 23806-501 - NEW
APPLIED MATERIALS (AMAT) VHP ROBOT BLADE P/N 0040-53105
NOVELLUS RING, GUAR, EXT CATHO, LTM, C3SPD 15-280354-00
BUCHANAN CONTROLLER, 4 AXIS ACTUATOR SM XSEL-K-4
SEMITOOL ANODE SET 300MM P/N 111T1197-01 - NEW
SUNX LASER LINE SENSOR CONTROLLER LD-C60
AMAT BELLOWS, FINGER LIFT, HASTALLOY 0040-39946
AMAT P5000 RF MATCH PHASE IV 0010-09416
PITTMAN AMETEK SERVO MOTOR GM14902D347-R5
AMAT CHAMBER UPPER LINER 300MM DPS 2 0040-81156
BTU INTERNATIONAL 5119123 PLNM, ASSY 400C 5KW PAR
BTU INTERNATIONAL 5113156 PLNM, ASSY 325C 5KW
DISCO HI-TEC ASSY, SPINDLE NCP00025--M
ASM EUR AET HEATER, 500W 42V OTS 2534584-01 20070132
DNS, MOTOR 8 AXIS MR-J10A-S07 2-9P-00075R
AMAT DOOR SLIT VALVE 300MM 0040-80809
GENERAL DRAWER, REFRIG. QCR-200 FRONT QCR-200-F
AMAT MAPPER, WAFER (CLASS 1) 1400-98010
PCB ARM W/ TRAN PREALIGNER HR96090-02 9407-0748-R
MKS TYPE 1651 THROTTLE VALVE CONTROLLER 1651D2S2
AMAT ASSMBLY, BELT TENSIONER, INTERNAL, BRUS 0010-11591
AMAT LOWER GDP, HT3, AXIOM 0200-02273
ASM EUROPE BV LEADSCREW, ELEVATOR SS SPINDLE 2513196-01
EBARA TECHNOLOGIES INC C-3512-021-0001 BLADE, ROBOT D
TEL PLATE, RF P1C DRM2 1D10-100938-12
ASM FLANGE, NG PUMPING (F1) 2608545-01
KAWASAKI BOARD MAIN (1GA) 2-XZ-12959-01 50999-1760R05
PRAXAIR CONTROLLER, ULTRAPURGE 100 PHOENIX PX12G07012
AXCELIS ROBOHAND PICKHEAD, FRONT 17006013 X2000522
VARIAN TRANSFORMER,ISOLATN,100KV,8KVA,SPH E19007420
OMS PCB, VEM44 STEPPER DRIVER ASS SPC0012C
