140xBE10000C
140xBE10000C
DCS系统是继PLC之外的一大自动化控制系统,它在化工、火电等领域的应用极为广泛,但是生产方面的自动化技术需求进一步提高,传统的DCS系统已不能满足需要,需要进行技术升级。
DCS系统由多台计算机分别控制生产过程中多个控制回路,同时又可集中获取数据、集中管理和集中控制的自动控制系统。分布式控制系统采用微处理机分别控制各个回路,而用中小型工业控制计算机或高性能的微处理机实施上一级的控制。
经过这些年来的不断应用,DCS系统在行业发展的一些局限性逐步体现出来,DCS存在的问题:
①1对1结构。1台仪表,1对传输线,单向传输1个信号。这种结构造成接线庞杂、工程周期长、安装费用高、维护困难。
②可靠性差。模拟信号传输不仅精确度低,且易受干扰。为此采用各种措施提高抗干扰性和传输精确度,其结果是增加了成本。
现货,现货,降降降,火火火,火火火……
现货,现货,降降降,火火火,火火火……
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OLYMPIC ConTROLS PNEUMATIC CALIBRATOR CAT#OCI-008R
WARNER ELECTRIC AC MOTOR CAT#MOG6210210 3/4HP 1725RPM 9
SQUARE D DISConNECT TYPE 12 SER E1 CAT#HU362AWC 60A 600
GE FANUC ASCII/BASIC MODULE CAT#IC610ABM100D
SQUARE D CAT#Q232225 225 AMP 240 VOLT 3 POLE
CUTLER-HAMMER BULLETIN 9589 ENCLOSED STARTER CAT#9589H3
SQUARE D SIZE 3 ConTACTOR SER A CAT#8536SE01 120VCOIL 3
GE ConTACT KIT CAT#55-153677G002
SIEMENS PLC EM300DS CAT#6ES7198-8FAO1-8AA NIB
ENCODER PRODUCTS ACCU-CODER CAT#758-A-20-S-5000-Q-HV-5-
SQUARE D SORGEL TRANSFORMER CAT#15T76H 15KVA 3 PHASE PR
HOFFMAN SCREW COVER PULL BOX CAT#ASG36X36X6NK
ITE PANELBOARD SER 7A CAT#CDP-7 400A 277V 3PH 4W
WESTINGHOUSE THERMAL MAGNETIC TRIP UNIT CAT#KT3125T 125
EDISON BULLET FAST ACTING CLASS L FUSE CAT#LCU800 800A
COOPER BUSSMAN LOW-PEAK TIME DELAY CLASS L FUSE CAT#KRP
GE CIRCUIT BREAKER CAT#TEY350ST12 50A/480V/3POLE W/SHUN
CUTLER-HAMMER DISConNECT 3R CAT#DH263UDK 100A 600V 1PH
GE FANUC SERIES FIVE ANALOG OUTPUT BOARD CAT#IC655ALG56
SQUARE D HOIST ConTACTOR CAT#8970RO5S2 120VCOIL
GE CIRCUIT BREAKER CAT#TJD432250 250 AMP 240 VOLT 3 POL
SQUARE D I-LINE CIRCUIT BREAKER CAT#FH36015 15A/600V/3P
CUTLER-HAMMER F DISConNECT CAT#DG324NGK IN BOX
CUTLER-HAMMER CIRCUIT BREAKER CAT#HFD3045 45A/600V/3POL
GE CIRCUIT BREAKER CAT#THED136110 110A/600V/3POLE
GE FANUC SERIES THREE HIGH CAPACITY POWER UNIT CAT#IC63
SQUARE D I-LINE CIRCUIT BREAKER CAT#Q232200 200A/240V/3
SQUARE D MCC BUCKET SIZE 1 CAT#8536SC03 120VCOIL 3PH 60
WESTINGHOUSE ConTACTOR CAT#A200M2CDD SIZE 2 45A 3PH 25H
HonEYWELL PC ConTROL MODUTROL BOARD CAT#220600 REV G
GE DISConNECT CAT#THN3364 200A 600V 3P
PLCDIRECT 5100 LOGIC 405 KOYO CAT#D4-430 W/RACK CAT#D4-
SQUARE D POWERPACT CIRCUIT BREAKER CAT#HGL36000S15ABSOL
WESTINGHOUSE CIRCUIT BREAKER CAT#LA3400PF 225A/600V/3PO
ITE CIRCUIT BREAKER CAT#F63F250 125A/600V/3POLE *NOB*
SQUARE D CIRCUIT BREAKER W/SHUNT CAT#FAL341001121 100A/
SQUARE D CIRCUIT BREAKER CAT#EJB34030 30A/480V/3POLE
GE CIRCUIT BREAKER CAT#TKMA836Y800 800A/600V/3POLE W/AU
CUTLER-HAMMER CIRCUIT BREAKER CAT#HMCPS015E0C 15A/600V/
CUTLER-HAMMER DISConNECT 3R CAT#DH363UDK 100A 600V 3POL
SQUARE D DISConNECT SER E1 CAT#H-364-N 200A 600V FUSIBL
SIEMENS CIRCUIT BREAKER CAT#HED63B100 100A/600V/3POLE
GE CIRCUIT BREAKER frame onLY CAT#TFK236F000 225A/600V/
TRUTZSCHLER GMB2C ConTROL STATION CAT#9 494-87.332.000
CUTLER-HAMMER CIRCUIT BREAKER CAT#FD2050 50A/600V/2POLE
SQUARE D DISConNECT 3R SER E1 CAT#H362-RB 60A 600V FUSI
FEDERAL PACIFIC CIRCUIT BREAKER CAT#NBH232040 40A/240V/
SQUARE D SIZE 1 MOTOR STARTER SER A CAT#8536SCO3H20S 3P
onEAC CORP CX750 POWER ConDITIONER CAT#006-715-T 240V 3