描述
一般来讲,DCS惯常使用两层网络结构,一层为过程级网络,大部分DCS使用自己的总线协议,比如横河的Modbus、西门子和ABB的Profibus、ABB的CANbus等,这些协议均建立在标准串口传输协议RS232或RS485协议的基础上。现场IO模块,特别是模拟量的采样数据十分庞大,同时现场干扰因素较多,因此应该采用数据吞吐量大、抗干扰能力强的网络标准。基于RS485串口异步通讯方式的总线结构,符合现场通讯的要求。IO的采样数据经CPU转换后变为整型数据或实型数据,在操作级网络(第二层网络)上传输。因此操作级网络可以采用数据吞吐量适中、传输速度快、连接方便的网路标准,同时因操作级网络一般布置在控制室内,对抗干扰的要求相对较低。因此采用标准以太网是最佳选择。TCP/IP协议是一种标准以太网协议,一般我们采用100Mbit/s的通讯速率。
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主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
Allen Bradley 30A Contactor, 100-A30ND3
Allen Bradley Breaker 1492-CB1H100 10A 10 Amp A 1P
ALLEN BRADLEY 100-A09ND3 LOT 100A09ND3
ALLEN BRADLEY 100-FSD250 SURGE SUPPRESSOR DIODE NEW
Allen Bradley 10A Circuit Breaker, 1492-CB2G100
ALLEN-BRADLEY 100A DISCONNECT SWITCH BUL. 1494F
Allen Bradley Contactor 100-C30DJ10
ALLEN-BRADLEY 100A DISCONNECT SWITCH BUL. 1494F
100-A09NZ*3 Allen Bradley 24v – 9a Contactor
Allen Bradley 1492-CB1H100 /C Circuit Breaker 10A 277V
ALLEN BRADLEY CONTACTOR 100-A12ND3 12A (ST56A)
ALLEN BRADLEY, 700-HN100, BASE SOCKET SCREW TERMINAL
Allen Bradley 100-A24NZ*3 Contactor Starter Series B
Allen Bradley Contactor 702L-DOA93, 100 Amp #29275
Allen Bradley 100-C09*10 Contactor 600VAC Max
ALLEN BRADLEY 1745-LP101 SLC100 PROCESSOR UNIT SERIES D
Allen-Bradley 1494F-NF100 Disconnect Switch
ALLEN BRADLEY 1321-3RA100-B 100 AMP LINE REACTOR NIB
ALLEN BRADLEY 100-B300 CONTACTOR 250 HP @ 460 VOLT
Allen Bradley AB 100A Lighting AC Contactor 500L-DOD93
Allen Bradley 1756-EN2TR SerA 10/100 Ethernet/IP
Allen Bradley 1494R-N2 100 Amp Pressure Type Connectors
Allen Bradley SLC100 Programmable Controller 1745-LP103
Allen Bradley Bulletin 100 Motor Contactor 100-A45NA3
Allen Bradley 100-C09*10 Contactor ~ Series A ~ 600 VAC
ALLEN-BRADLEY 100A DISCONNECT SWITCH BUL. 1494F
ALLEN BRADLEY,CAT. Z-340400,SIZE 3/100AMP./1POLE?.
Allen Bradley 100-FSD250 Surge Suppressor Diode (3004)
Allen Bradley 100-FA40 Auxiliary Contact Block
ALLEN BRADLEY 1401-N44 FUSE CLIP KIT 100AMP NEW
ALLEN BRADLEY 100-C16A10 USPP 100C16A10
Allen Bradley 100-B110NZJ3 Series A
100-A12ND*3 Allen Bradley 120v – 12a Contactor
1492-CB2H100 Allen Bradley 10 A Breaker 1492-CB2-H100
Allen Bradley 100-F Series B Front Mount Aux. Contact
Allen-Bradley MOTOR STARTER CONTACTOR 600V 100-B300N*3
ALLEN BRADLEY 100-FA40 CONTACT BLOCK 600V MAX 10A 4NO
Allen Bradley 700-HA32Z24 Relay w/700-HN100 Base
Allen Bradley 100-S ser. A auxiliary contact block NOS
Allen-Bradley CAT 100-A12 3-Pole Contactor
100-A12NZ*3 Allen Bradley 24v – 12a Contactor
Allen Bradley 100-B180N*3 Contactor
Allen Bradley 100-C37D10 Series C Contactor New
Allen Bradley 100-A09ND3 contactor 9 amp 120/110v coil
ALLEN BRADLEY CIRCUIT BREAKER 10A 1492-SP1D100 AAHH3
ALLEN BRADLEY SAFETY RELAY 700-ZBR100AZ1 700Z 24V
Allen-Bradley 100A Fusable Disconnect Switch 1494V-DS10
Allen Bradley 16 Amp Contactor, 100-C16D200
ALLEN BRADLEY 100-C43D*00 & 193-EA1JD STARTER COIL24VDC
A-B ALLEN BRADLEY 1492-GH100 10.00AMP CIRCUIT BREAKER
ALLEN BRADLEY CONTACTOR COIL 100-A60NZ*3 USED
700 RT33Z100A1 ALLEN BRADLEY TIMER RELAY
ALLEN BRADLEY CIRCUIT BREAKER 10A 1492-SP1D100 ASPH3
ALLEN BRADLEY CONTACTOR 100 C16DJ10 3 POLE 24V DC
Allen Bradley 1336F-BRF100-AN?-EN-L6 10HP AC Drive New
1492-100YF Allen Bradley New In Box Terminal 1492100YF
Allen Bradley 100-B250N*3 Ser:B 250HP Contactor 120V
Allen Bradley SLC100 Programmable Controller 1745-LP103
Allen Bradley 100-FSV136 SURGE SUPPRESSOR
Allen Bradley 100-C23ZG200 Contactor 72VDC 100C23ZG200
ALLEN BRADLEY 100-A18NZ 3 CONTACTOR 18 A 24 VDC COIL