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3A99859G02值得擁有

3A99859G02值得擁有

dcs系統(tǒng)接地的基本要求 
　　dcs系統(tǒng)接地是為了保證當(dāng)進入dcs系統(tǒng)的信號、供電電源或dcs系統(tǒng)設(shè)備本身出現(xiàn)問題時，可靠的接地系統(tǒng)能承受過載電流并可以迅速將過載電流導(dǎo)入大地。接地系統(tǒng)能夠為dcs提供屏蔽層，消除電子噪聲干擾，并為整個控制系統(tǒng)提供公共信號參考點(即參考零電位)。當(dāng)接地系統(tǒng)發(fā)生問題時(接地電阻過大，多點接地控制工程網(wǎng)版權(quán)所有，接地線斷線或接地線與高電壓、大電流設(shè)備相接觸等)，會造成人員的觸電傷害及設(shè)備的損壞，還會造成dcs系統(tǒng)經(jīng)?！八罊C"(或不明原因的“死機")，大多是因為接地系統(tǒng)不良或存在問題所引起的。 
　　因此，完善、可靠、正確的接地，是dcs 系統(tǒng)能夠安全、可靠和良好運行的關(guān)鍵。
d cs系統(tǒng)的接地方法 
　　4.1 分散布置的dcs設(shè)備接地方法 
　　分散布置dcs系統(tǒng)設(shè)備之間的連接一般是網(wǎng)絡(luò)(通訊)線，例如：現(xiàn)場控制站分散到現(xiàn)場，而操作員站位于不同的控制室，分散直徑在500米的范圍內(nèi)，各站點間使用多模光纖或5類雙絞線或dp屏蔽雙絞線等連接。 
　　(1) 使用光纖連接的站點：各站點內(nèi)的接地方法同集中布置的dcs設(shè)備。 
　　(2) 使用5類雙絞線或dp屏蔽雙絞線連接的站點： 
　　(3) 控制室的各類地線先連接到公共連接板，公共連接板通過接地總干線與公共接地極相連。從公共接地極看過去，整個接地網(wǎng)絡(luò)是一個星型結(jié)構(gòu)。

LOGOSOL LS-773  LOGOSOL, NETWORK I/O NODE LS-773

NATIONAL SEMICONDUCTOR LF355AH  NATIONAL SEMICONDUCTOR I.C.

LED-GPOA70-228TR MANUFACTURING INTEGRATION TECHNOLOGY LED-GPOA70-228TR    LIGHTI

BECKHOFF KL9186  Potential distribution terminals

NIKON KBB04410 A03-1    ARM SHORT, SIDE SLIDE

JF325914  KF-KF-TUBE T ADAPTER; flange: 50.45mm(O.D.)/ 21.87mm (I.D.); 2nd flang

IMP16SU MEACON CORP IMP16SU    UNION, 1X1 TUBE TEFLON

MECHANICAL PLASTICS GJWB60  MECHANICAL PLASTICS CORP THE TB TOGGLER BUMPER KNOB

NAGANO KEIKI GC94-211  DIGITAL METER RELAY

KLOCKNER-MOELLER FAZN-C10  CIRCUIT BREAKER

TOKYO ELECTRON () ES027-002507-1      O-RING, FLUORINE ID3.359 CSD. 150 BLACK

KEYENCE EM-080  SENSOR, PROXIMITY

VARIAN E41000072      BELT, IMPLANT SUB-SYSTEM

OLYMPUS DV308600-1 AT292300 DV308600-1    ?PCB, FRONT PANEL-REPAIRED

TOKYO ELECTRON () DS012-012061-1    Valve Ball, G-470072 3/8

TOKYO ELECTRON () CT024-012012-1    FILTER,HSG,F-16SS HOUSIG

REGENT GRAND INVESTMENT LTD. CNID-48304B  Mask Slit

RECIF TECHNOLOGIES S.A.S CI-IDW1 193-03A    PCB

EBARA C-3102-175-0001      T/R GUIDE (N)

TOKYO ELECTRON () C-2110-850-0001    SOCKET, QUICK CONNECTOR

EBARA C-1100-152-0001    SHAFT, SPLINE

APPLIED ROBOTICS BXCC-25-02-U  MATING CONNECTOR W/CABLE

VERSATEST BRD-V0890  VERSATEST 1000 PATTERN GENERATOR WITH VERSATEST V1000 PATTE

TOKYO ELECTRON () BB10-202231-11    PICK，CER8(PI-P)

OLYMPUS AS721900      S-GUIDE

CKD AMD31-12US-10  VALVE Teflon,AIR OPERATE PILAER

ASYST Technologies 9700-4228-01    Adapter Plate 150mm

Allmro Products Inc. 933953  3(.5) X 6 SS SHCS VENT/CLEAN PKG 33

GREENE TWEED 9120-SD653  O-RING, CHEMRAZ

SPM INC 90122-1  PERF PLATE AMAT MRA 8 INCH

Lam Research (LAM) 853-627000-004    Heater Cable

LAM RESEARCH (LAM) 853-034112-006    SENSOR, TEMPERATURE

LAM RESEARCH (LAM) 853-017932-001    STEPPER MOTOR CABLE

LAM RESEARCH (LAM) 853-017423-002    CABLE COAX RF MATCH BOX ASSY

HONEYWELL ELECTRONIC MATERIALS 815018-215  THERMOCOUPLE 5 zone ,PROFILE,K TYPE,2

Applied Materials (AMAT) 1210-03062 RESPOS TEMP COEF RESETTABLE 30V 2.50A 1. ***

EOS Technology  WS167  SPACE GROUND ELECTRODE

METRON TECHNOLOGY U3ATRM2018/UBATRM200  HAND/SHEET

CELERITY GROUP INC TR0001346803  TRANSDUCER, PRESSURE

RECIF TECHNOLOGIES S.A.S IDLW DISPLAY      BOARD, CARRIER ROTATION MANAGEMENT

CAT SS-1613  FITTING FRONT FERRULE 1  SS

RIGAKU SPS-8T-4H  PRESSURE SWITCH

PATLITE SL-V  Signal Tower, 24v AC/DC Bulb 0.11A

LANDIS & GYR SEZ 61.1  POLYGYR SWITCH ON-OFF SEZ 61.1 L&G, 24POLYGYR~+20%, 50...

SCP GLOBAL 00006188-00    Cylinder. LID Actuation Tank E200. 1.44W X 1.25D X 6.1

APPLIED MATERIALS (AMAT) 0021-10085    BRACKET,LOCKOUT/TAGOUT,PROCESS GAS,RTP

APPLIED MATERIALS (AMAT) 0020-96466    FINGER GRIPPER,125 EXT. 6-FINGER GRIPPER

APPLIED MATERIALS (AMAT) 0020-93465    SCREW,VAC HEX HD M10X20L

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CAT 01-7923  NOZZLE FULL CONE, SPRAY 60 DEGREE, WITH WHIRLER PVDF

TOKYO ELECTRON () 017-003665-1    TUBE R 360 3.9MM 12MM; 36 Feet Long

APPLIED MATERIALS (AMAT) 0150-A0130    ASYST SIGNAL TOWER CABLE

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APPLIED MATERIALS (AMAT) 0150-20243    CABLE ASSY,DEBUG SYNERGY SBC

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APPLIED MATERIALS (AMAT) 0150-03987    CABLE ASSY, CNTLR TO O3 GEN, O3 DELIVERY

APPLIED MATERIALS (AMAT) 0140-35935    HARNESS ASSY, INTLK SW, DPS CHAMBER

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CYBEQ 0122-0740  Controller 2660 CALIBRATION

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VARIAN 0068831900    SENSOR SHUTTLE

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APPLIED MATERIALS (AMAT) 0720-91422    QIKMATE Plug Body+HOOD, 2 WAY

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APPLIED MATERIALS (AMAT) 0720-01872 AMPHENOL (AMP) 747303-3  CONN RCPT CA MTG 15

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TOKYO ELECTRON () 071-001701-1    CHEMICAL..ORGARD C-601 250CC/*

APPLIED MATERIALS (AMAT) 0680-01851 CUTLER-HAMMER SPCL1C16T  CB SUPPL PROTEC CUR

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APPLIED MATERIALS (AMAT) 0620-98075    DNET 5.0M TRUNK M-STR/F-STR

APPLIED MATERIALS (AMAT) 02-81933-26    RIBBON CABLE, C/D

APPLIED MATERIALS (AMAT) 0270-09232    Tools, Chamber Leak Check, Joint, Z

TOKYO ELECTRON () 027-003186-1    O-RING..ARMOR CRYSTAL AS568A-110 B60

APPLIED MATERIALS (AMAT) 0227-12599    HARNESS ASSY, INTERLOCK, 5200, TF SLD, S

APPLIED MATERIALS (AMAT) 0226-96765    ASSY REFILLABLE LEVEL SENSE/TEMPERATURE

APPLIED MATERIALS (AMAT) 0200-36001    FINGER LIFT,300MM ASP

APPLIED MATERIALS (AMAT) 0200-09614    Pin, Lift wafer 200mm BWCVD

APPLIED MATERIALS (AMAT) 1270-90255 GEMS 1013110  Adjustable Pressure Switch PDC

APPLIED MATERIALS (AMAT) 1200-90071 Magnecraft W67TRCSX-8  Relay 24V 3A 4PDT, 3A

APPLIED MATERIALS (AMAT) 1200-01308 POTTER & BLUMFIELD CB-1038D-38  Time Delay R

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AVIZA TECHNOLOGY 112784-01    Fitting, Adapter KF to VCR, Purge Plate

APPLIED MATERIALS (AMAT) 1120-00031    Beam Splitter 12.5 X 17.5 X 1 50R/50T

IDI 1-111-513  FILTER-IN/OUT 10-32 W/BRACKET

10663-001    Z-AXIS BELT BRUSHLESS

LINDE AG 106494  SEALING ELEMENT FOR PIC2610

SVG THERMCO 101873-01      VTR- RING,CEILING BLKHD,8"

PARKER INSTRUMENTS 1017-0003    VALVE, BODY REAR CHECK PP-20

Applied Materials (AMAT) 1015-20/10-96    Wire/Cable, 1000 Ft., Type: MTW/AWM, #

APPLIED MATERIALS (AMAT) 1010-00282    LED,12V,30Ma,YEL,INT-RES,F-TAB