ABB NPBA-80
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[關(guān)鍵詞] 分散控制系統(tǒng)(DCS)可編程序控制器(PLC)安全儀表系統(tǒng)(SIS)MOTOROLA MVME 工業(yè)用模組 壓縮機(jī)組控制系統(tǒng)(CCS)ESD系統(tǒng);振動監(jiān)測系統(tǒng)卡件
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市場上有一種磁盤陣列,專為服務(wù)器設(shè)計,是一種海量存儲器產(chǎn)品。硬盤驅(qū)動器陣列可裝入大量驅(qū)動器,用磁盤鏡像或RAID提供容錯,自動將服務(wù)器數(shù)據(jù)的多個拷貝存儲到不同硬盤驅(qū)動器上。當(dāng)驅(qū)動器發(fā)生故障時,所有數(shù)據(jù)依然對用戶有用。有些陣列驅(qū)動器甚至可熱交換,能在機(jī)器運行時更換故障。
服務(wù)器使用的RAID版本是RAID5,能為所有現(xiàn)在版本的C/S網(wǎng)絡(luò)操作系統(tǒng)所支持。RAID5數(shù)據(jù)“分析(stripes)"到多個SCSI驅(qū)動器上,使單個損壞驅(qū)動器上的內(nèi)容可以從陣列中其他驅(qū)動器的信息里重建。當(dāng)一個帶熱交換驅(qū)動器和供電的服務(wù)器結(jié)合在一起時,RAID5可使服務(wù)器以接近連續(xù)的24×7正常運行。
如果DCS不是采用C/S結(jié)構(gòu)的操作站,因各個操作站互相獨立,只保存一部分?jǐn)?shù)據(jù),如果是冗余配置,可靠性已很高,就不一定采用RAID技術(shù)。
DCS操作站為文件備份,可在操作站上安裝一個SCSI磁帶驅(qū)動器。采用C/S結(jié)構(gòu)的,在服務(wù)器上安裝磁帶機(jī),可把用戶組態(tài)的應(yīng)用軟件拷貝在磁帶機(jī)上。操作站或服務(wù)器發(fā)生故障時,能把應(yīng)用程序重新輸入。磁帶機(jī)產(chǎn)品更新也較快,1990年左右進(jìn)口DCS配備的磁帶機(jī)現(xiàn)在已買不到備件或磁帶,新老磁帶機(jī)和磁帶不兼容。
S9000系統(tǒng)控制器由兩部分組成,一塊3C905卡完成模擬量控制,另一塊PLC主機(jī)LPM620-0072,主機(jī)上有以太網(wǎng)口,它在組成系統(tǒng)時,采用以太網(wǎng)連接,組成C/S結(jié)構(gòu)。以太網(wǎng)連線有兩種方式,在客戶機(jī)較多情況采用集線器連接。
如果只用1~2臺操作站和1~2臺控制器就把所有操作站、控制器連在公共電纜上,網(wǎng)上連接設(shè)備很少,也可以采用T型連接器。
服務(wù)器比客戶機(jī)包含更多驅(qū)動器,還需考慮它的電源功率和可靠性。電源很容易被忽視,如忽視電源直流輸出是否穩(wěn)定,還有噪聲、雜散信號、尖峰脈沖和浪涌。電源是容易出故障的部件之一。電子線路采用+3.3V或5V,硬盤驅(qū)動器和風(fēng)扇采用+12V電壓。
有以太網(wǎng)的網(wǎng)絡(luò)適配器,也有其他網(wǎng)絡(luò)適配器,但都不如以太網(wǎng)用得多,所以價格也高。采用以太網(wǎng)能降低DCS成本。
Measurex MX64 + Procesadora Tabla 05412101 Rev B
Measurex Netzteil 220/230V-AC 24/48V-DC 4342/1
MEASUREX OFFICE SUPPLY GENERAL RIBBON BLACK HI-TYPE 2 19-000102 NIB LOT OF 12
Measurex P/N 04291100 Rev.B
Measurex P/N 04291201 Rev.B
MEASUREX P/N 04291900 05291900 PC BOARD DC CONTACT OUTPUT BUFFER
Measurex P/n 0429200 Rev Pc Board FSK Uhr Generator 05292900
Measurex P/n 04292100 Rev B Stk. Platte Gegenmutter Eingang Puffer 05292100
MEASUREX P/N 04294200 REV C ASSY 05294200 REVJ PC BOARD
MEASUREX P/N 04317200 REV B PCB MODULE QUAD TACH/COUNTER ASSY NO 05317200 REV E
Measurex P/N 04323900 Rev B Backplane Assemblaggio 05323900
MEASUREX P/N 04330200 PLASMA DISPLAY ELECTRONICS 053302-00
MEASUREX PC BOARD MODULE PART NO. 09436600
Measurex PCB Board 4-28883-01
MEASUREX PCB BOARD ASSY NO 05295000
MEASUREX PCB BOARD ASSY NO 05327902
MEASUREX PCB BOARD ASSY NO 053450
MEASUREX PCB BOARD ASSY NO 05353100
MEASUREX PCB BOARD ASSY NO 05375900
MEASUREX PCB BOARD BASIC ASSY NO 05341400
MEASUREX PCB MODULE ASSY NO 05292900 REV A
MEASUREX PCB MODULE ASSY NO 05294200 REV J
MEASUREX PCB MODULE ASSY NO 05319300 REV A
MEASUREX PCB MODULE ASSY NO 05320400 REV B
MEASUREX PCB MODULE ASSY NO 05331100 REV D
MEASUREX PCB MODULE COUNTER INPUT BUFFER ASSY NO 05292100 REV C
MEASUREX PCB MODULE FRONT DPO INTERFACE DRIVER ASSY NO 05332900 REV A
MEASUREX PCB MODULE HIGH DENSITY CONTACT OUTPUT BUFFER ASSY NO 05319100 REV B
MEASUREX PCB MODULE QUAD TACH/COUNTER ASSY NO 05317200 REV C
Measurex Periferico Interruttore Interfaccia 05271400
MEASUREX PERIPHERAL SWITCH INTERFACE 05271400
Measurex Periphere Schalter Schnittstelle 05271400
Measurex Périphériques Interrupteur Interface 05271400
Measurex PIDP 09437701 Module PLC Processor 12011 08585302 Honeywell
Measurex PIDP 09437701 Rev D PLC Processor Module 08585302 Honeywell Pulse Input
Measurex PIDP 09437702 Rev A PLC Processor Module 08585302 Honeywell Pulse Input
Measurex Pidp Iisx Carte Circuit 08560400
MEASUREX PIDP IISX CIRCUIT BOARD 08560400
Measurex Pidp Iisx Placa de Circuitos 08560400
Measurex Pidp Iisx Scgaltplatte 08560400
Measurex Pidp Iisx Scheda Circuiti 08560400
MEASUREX PIDP PC BOARD
Measurex PIP 09439300 Module PLC Pulse Input Processor 05401200 9334 Honeywell
Measurex Plasma display electronics Assy : 05330200 Part : 04330200 REV A
MEASUREX POWER FAIL LOGIC 05294300 REV C 104012
Measurex POWER FAIL RESTART 05289900
MEASUREX POWER SUPPLY 220/230V-AC 24/48V-DC 4342/1
MEASUREX POWER SUPPLY BOARD 05268101 REV. B 104081
Measurex Power supply CPU 09805600 Rev C with Comm Board
MEASUREX PRIORITY JUMPER 05290400 REV. D 104023
Measurex priority jumper assy no. 05290400
MEASUREX PRIORITY JUMPER DUALDEC PCB BOARD REV A 05364100
Measurex Procesadora Tabla 05356702
MEASUREX PROCESS/SCANNER 4891
MEASUREX PROCESSOR BOARD 05356702