XYCOM CA3-USBCB-01現(xiàn)貨
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現(xiàn)場(chǎng)總線(xiàn)網(wǎng)絡(luò):現(xiàn)場(chǎng)總線(xiàn)技術(shù)是當(dāng)今自動(dòng)化領(lǐng)域技術(shù)發(fā)展熱點(diǎn)之一,被譽(yù)為自動(dòng)化領(lǐng)域的計(jì)算機(jī)局域網(wǎng),它的出現(xiàn)標(biāo)志著自動(dòng)化控制技術(shù)又一個(gè)新時(shí)代的開(kāi)始。現(xiàn)場(chǎng)總線(xiàn)是連接設(shè)置在控制現(xiàn)場(chǎng)的儀表與設(shè)置在控制室內(nèi)的控制設(shè)備的數(shù)字化、串行、多站通信的網(wǎng)絡(luò)。其關(guān)鍵標(biāo)志是能支持雙向、多節(jié)點(diǎn)、總線(xiàn)式的全數(shù)字通信。現(xiàn)場(chǎng)總線(xiàn)技術(shù)近年來(lái)成為國(guó)際上自動(dòng)化和儀器儀表發(fā)展的熱點(diǎn),它的出現(xiàn)是傳統(tǒng)的控制系統(tǒng)結(jié)構(gòu)產(chǎn)生了革命性的變化,是自控系統(tǒng)朝著智能化、數(shù)字化、信息化、網(wǎng)絡(luò)化、分散化的方向邁進(jìn),形成新型的網(wǎng)絡(luò)集成式全分布式控制系統(tǒng)---現(xiàn)場(chǎng)總線(xiàn)控制系統(tǒng)FCS(Fieldbus Control System)。但是現(xiàn)在的現(xiàn)場(chǎng)總線(xiàn)的各種標(biāo)準(zhǔn)并行存在并且都有自己的生存領(lǐng)域,還沒(méi)有形成真正統(tǒng)一的標(biāo)準(zhǔn),關(guān)鍵是看不到什么時(shí)候能形成統(tǒng)一的標(biāo)準(zhǔn),技術(shù)也不夠成熟。另外現(xiàn)場(chǎng)總線(xiàn)的儀表種類(lèi)還比較少可供選擇的余地小,價(jià)格也偏高,從終用戶(hù)的角度看大多還處于觀(guān)望狀態(tài),都想等到技術(shù)成熟之后在考慮,現(xiàn)在實(shí)施的少。
RS485網(wǎng)絡(luò):RS485/MODBUS是現(xiàn)在流行的一種布網(wǎng)方式,其特點(diǎn)是實(shí)施簡(jiǎn)單方便,而且現(xiàn)在支持RS485的儀表又特多,特別是在油品行業(yè)RS485/MODBUS簡(jiǎn)直是一統(tǒng)天下,現(xiàn)在的儀表商也紛紛轉(zhuǎn)而支持RS485/MODBUS,原因很簡(jiǎn)單,象原來(lái)的HART儀表想買(mǎi)一個(gè)轉(zhuǎn)換口非常困難而且價(jià)格昂貴,RS485的轉(zhuǎn)換接口就便宜的多而且種類(lèi)繁多。至少在低端市場(chǎng)RS485/MODBUS還將是主要的組網(wǎng)方式,近兩三年內(nèi)不會(huì)改變。
ESD緊急停車(chē)系統(tǒng)
ESD是英文Emergency Shutdown Device緊急停車(chē)裝置系統(tǒng)的縮寫(xiě)。這種專(zhuān)用的安全保護(hù)系統(tǒng)是90年代發(fā)展起來(lái)的,以它的高可靠性和靈活性而受到一致好評(píng)。 ESD緊急停車(chē)系統(tǒng)按照安全獨(dú)立原則要求,獨(dú)立于DCS集散控制系統(tǒng),其安全級(jí)別高于DCS。在正常情況下,ESD系統(tǒng)是處于靜態(tài)的,不需要人為干預(yù)。作為安全保護(hù)系統(tǒng),凌駕于生產(chǎn)過(guò)程控制之上,實(shí)時(shí)在線(xiàn)監(jiān)測(cè)裝置的安全性。只有當(dāng)生產(chǎn)裝置出現(xiàn)緊急情況時(shí),不需要經(jīng)過(guò)DCS系統(tǒng),而直接由ESD發(fā)出保護(hù)聯(lián)鎖信號(hào),對(duì)現(xiàn)場(chǎng)設(shè)備進(jìn)行安全保護(hù),避免危險(xiǎn)擴(kuò)散造成巨大損失。 根據(jù)有關(guān)資料,當(dāng)人在危險(xiǎn)時(shí)刻的判斷和操作往往是滯后的、不可靠的,當(dāng)操作人員面臨生命危險(xiǎn)時(shí),要在60s內(nèi)作出反應(yīng),錯(cuò)誤決策的概率高達(dá)99.9%。因此設(shè)置獨(dú)立于控制系統(tǒng)的安全聯(lián)鎖是十分有必要的,這是作好安全生產(chǎn)的重要準(zhǔn)則。該動(dòng)則動(dòng),不該動(dòng)則不動(dòng),這是ESD系統(tǒng)的一個(gè)顯著特點(diǎn)。 當(dāng)然一般安全聯(lián)鎖保護(hù)功能也可由DCS來(lái)實(shí)現(xiàn)。那么為何要獨(dú)立設(shè)置ESD系統(tǒng)呢因?yàn)橛谳^大規(guī)模的緊急停車(chē)系統(tǒng)應(yīng)按照安全獨(dú)立原則與DCS分開(kāi)設(shè)置,這樣做主要有以下幾方面原因: (1)降低控制功能和安全功能同時(shí)失效的概率,當(dāng)維護(hù)DCS部分故障時(shí)也不會(huì)危及安全保護(hù)系統(tǒng); (2)對(duì)于大型裝置或旋轉(zhuǎn)機(jī)械設(shè)備而言,緊急停車(chē)系統(tǒng)響應(yīng)速度越快越好。這有利于保護(hù)設(shè)備,避免事故擴(kuò)大;并有利于分辨事故原因記錄。而DCS處理大量過(guò)程監(jiān)測(cè)信息,因此其響應(yīng)速度難以作得很快; (3)DCS系統(tǒng)是過(guò)程控制系統(tǒng),是動(dòng)態(tài)的,需要人工頻繁的干預(yù),這有可能引起人為誤動(dòng)作;而ESD是靜態(tài)的,不需要人為干預(yù),這樣設(shè)置ESD可以避免人為誤動(dòng)作。 ESD緊急停車(chē)裝置,在石化行業(yè)以及大型鋼廠(chǎng)及電廠(chǎng)中都有著廣泛的應(yīng)用。實(shí)際上它也是通過(guò)高速運(yùn)算PLC來(lái)實(shí)現(xiàn)控制的,它與PLC的本質(zhì)區(qū)別在于它的輸入輸出卡件上,應(yīng)為一切為了安全考慮,所以在硬件保護(hù)上做得較為完善,而且他要考慮到在事故狀態(tài)下,現(xiàn)場(chǎng)控制閥位及各個(gè)開(kāi)關(guān)的位置。
AMETEK 4" 0/600 PSI WITH HIGH PRESSURE FITTING.
AMETEK 4" 0/3000 PSI 1/4NPT WITH HIGH PRESSURE FITTING.
AMETEK 4" 0/5000 PSI WITH HIGH PRESSURE FITTING.
AMETEK 4.5 1981 SS 02L 160 PSI 1/4"npt
AMETEK DIGITAL THERMOMETER MODEL DT-8330 400/1500 F
6" STEEL WIND TURBINE GENERATOR HUB 4 AIRX blades 4 Ametek or other PM gen 17mm
New Ametek Panalarm 50-L 125DC Relay
AMETEK GAUGE 168541, 1/4" NPT LM, 300 PSI
2 AMETEK/US GAUGE GAUGES M# 5843 - NEW
AMETEK COMPOUND GAUGE 30"Hg TO 30PSI 4-1/2"
Ametek 8280650 - 30-0 Hg 1/4" ANPT LM Vacuum Gauge
NEW USG AMETEK 256013 STYLE: 6562 GAUGE (B97)
Ametek US Gauges Fire Protection Gauge 0-80 PSI 80-250 PSI Retard R-1590 NIB
USG Ametek 2" P-844U General Purpose Gauge 0-100 psi 1/8" NPT 164419 138004 NIB
USG Ametek 2" P-844U General Purpose Gauge 0-60 psi 1/8" NPT 164418 NIB
NEW Relay Switch Solenoid 24 VOLT Prestolite Ametek
NEW USG AMETEK 256019 STYLE: 6562 GAUGE (B97)
1 NIB AMETEK 163139 GAUGE O4-1
AMETEK/USG P550 100 PSI 1/4" ANPT Stainless Tube/Socket
AMETEK USG 161964A PRESSURE GAUGE NIB
Ametek P1555LX Pressure Gauge
Ametek Panalarm 50S190NO Relay
Ametek Panalarm 30-H1 Relay
AMETEK 47104 0-30 PSI 2 1/2" FIG. V-500 PRESSURE GAUGE, NEW
Pittman Ametek GM9434G973-R1 Gearmotor 24-VDC 11.5:1 Gear Motor Gearmotor Servo
AMETEK 0-30PSI *NEW IN BOX*
Ametek Hunter Spring Negator B Motor Hatfield, Pa. Ne'gator
Ametek Panalarm Relay 50-NO
6" STEEL WIND TURBINE GENERATOR HUB 4 AIRX blades 4 Ametek or other PM gen .625"
6" WIND TURBINE GENERATOR METAL HUB 4 AIR-X blades Ametek or other PM gen .500"
NEW AMETEK PANALARM 50-NO RELAY 120V / 50-60 HZ
AMETEK US GAUGE 0-60 psi, 4-1/2 FACE, 1/2" LM, BRASS TUBE & SOCKET 290ER06
Ametek Lamb Vacuum Cleaner Motor Stationary Fan 31175, Fits all 7.5" motors
AMETEK 166322 PRESSURE GAUGE, 100PSI
Ametek 33202 Gauge 0-30 PSI 1/4" NEW
AMETEK P 844 U 2-1/2" PRESSURE GUAGE P844U NEW
Ametek SPT0500X140 Pressure Transducer 1-6VCD
NEW AMETEK 4 1/2" GAUGE 60 PSI 1/2"ANPT FIG. 1980
AMETEK 37325 PRESSURE METER 50PSI 2.5: 138045 NEW
Ametek Series P500 0-600psi Utility Pressure Gauge NIB
USG AMETEK GAUGE P844UK 2”
NEW USG Ametek Utility Gauge 165298, 100 PSI, 1/4 NPT LM #32786
Ametek / Hunter Spring L-1000M Mechanical Force Gage
NEW AMETEK 2300 PSI GAUGE- CONN. 1/4 ANPT LM,SIZE 4 1/2
(2) Ametek USG 300 PSI Gauge E 91
AMETEK GAUGE 100PSI 163271 *NEW IN BOX*
XYCOM CA3-USBCB-01
Ametek 1X599 0-100 psi 4.5" pressure gauge
WIND GENERATOR TURBINE 400 WATT WITH AMETEK MOTOR
Ametek Vacuum Motor 118148-53 120V 50/60Hz (EC4-2)
AMETEK Alpha 11 Air Sampler Pump Charger # HH0091
Ametek Drexelbrook LCS High Sensitivity Electronics
AMETEK Prestolite SAZ-4201BR Relay Switch Solenoid
AMETEK GAUGE P500 1/4 ANPT CONNECTION SIZE 2
Ametek 24337212-001 Dual Pressure Module 1708 03237212A
Ametek / USG Pressure Gauge 0-30 PSI
New Genuine Ametek Lamb 2 Stage 7.2" Peripheral Bypass Vacuum Motor 115330
AMETEK Panalarm 1423N0L Annunciator Module 1423NOL
AMETEK GAUGE WITH SEAL , 4 1/2" ,160 PSI
AMETEK USG P656 356017LG 0-1000 psi 4" STAINLESS LIQUID-FILLED PRESSURE GAUGE
Ametek Short Shaft Motor, Power Nozzle Hoover Filter Queen - # 5409-31 - NEW
AMETEK 58G3-15BE2 PRESSURE SWITCH 20-100KPA 1/4NPT 115V 17994
New Ametek / pittman GM8222D314-R3 24 VDC GEAR MOTOR
RILEY AMETEK PANALARM 50NC-120A RELAY 120V 60HZ 120 V
Ametek P844UK 2 ?” General Panel Mount Gauge New
AMETEK GAUGE PT 1088 50/260 1/2 ANPT LM
Vacuum Motor CC217L051 Ametek Lamb Oreck NEW
Ametek tachometer
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-
AMETEK DIXSON PROGRAMMABLE BAR GRAPH 0-150 DEG F (s7a)
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-60 (s7a)
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-200 PSIG
AMETEK DIXSON PROGRAMMABLE BAR GRAPH 0-200PSIG B101P
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-150 PSIG
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH -50 to +100
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-1000 SCFM
Boeing Aircraft Flap Position Transmitter P/N 966-0013-003
AMETEK / DREXELBROOK 420-1-409 408-6200 SERIES COTE-SHIELD ENCLOSURE - USED, NIC
AMETEK HUNTER SPRING DIV GROUNDING REEL PN ML1565 NIB
AMETEK FILTER HOUSING PATENT # 4731183
OH Ametek Aircraft Load Meter Indicator P/N 8AW61LLA1
0-600 Dial Pressure Gage Ametek Liquid Filled (New in Box) Model P1559LG
AMETEK AIR VOLUME CONTROL
Ametek Mechanical Force Gauge LKG-2 with case
AMETEK PRESSURE GAUGES VACUUM V500 1/4"LM
XYCOM CA3-USBCB-01
AccuRay AD-3-053853-00?2 Power Supply
ABB ACCURAY AD-8-066159-00?1 POWER SUPPLY ASSEMBLY ASSY MODULE 12/25V 58018
ACCURAY 082132-001 SCANNER CONTROL BOARD MODULE CARD 58863
ACCURAY S1N030TL NSFP S1N030TL
AccuRay 9-064856-001 Power Failsafe
AccuRay AD-4-053795-00?2 DD Channel Data Display
AccuRay AD-9-053780-00?3 Display Board
ACCURAY 085354-001 ECN SCANNER CONTROL BOARD MODULE CARD REVISION B 59003
ACCURAY 072373-001 NSPP 072373001
ACCURAY S1N030TL NSPP S1N030TL
ACCURAY 086179-502 DIAGNOSTIC ELECTRIC CIRCUIT BOARD MODULE CARD RACK 58011
HONEYWELL ACCURAY BCMMST4A 60144916-001 SCANNER PCB CONTROL CIRCUIT BOARD 58628
ACCURAY 123497-001 TIMING BELT TENSION GAGE TOOL 50-200LB REVISION REV D 51980
ACCURAY 086261-501 USPP 086261501
ACCURAY S1N030TL USPP S1N030TL
ABB ACCURAY 8-061594-003 SSI PCB CIRCUIT BOARD MODULE CARD 56992
AccuRay 064844-002 PC Board
AccuRay 069242-001S LEM Control Borad
HONEYWELL ACCURAY BCMM044B 60144916-001 SCANNER PCB CONTROL CIRCUIT BOARD 58629
ABB ACCURAY 1-084902-001 REV REVISION CB TEST PANEL CIRC MODULE CARD BOARD 58691
ACCURAY MCC/IFCC I/F PART 013509 REV J
ABB ACCURAY 1-084902-001 TEST PANEL 1084902001
ACCURAY MDD25-16N1 USPP MDD2516N1
ACCURAY 4-073258-001 POWER CONSERVATION UNIT MODULE CARD BOARD 58645
ACCURAY 4-083182-001 I/O CIRCUIT BOARD MODULE CARD WITH COVER 58673
ACCURAY 083898-150 R150M T.C. TC PC ASSY ELT AD-4 RELAY ASSEMBLY MODULE 59014
ACCURAY 3-083688-001 GPI PCB PRINTED CIRCUIT BOARD MODULE CARD 57489
ACCURAY 085095-001A SHUNTS METER CONTROL PANEL MODULE 58843
ACCURAY 086257-502 SCANNER FSA A CONNTECTOR BOARD CARD MODULE PCB 51624
HONEYWELL ACCURAY 60144916-001 SCANNER PC PCB CONTROL CIRCUIT BOARD CARD 51971
ACCURAY 69242-002 LEM PC BOARD EXCELLENT CONDITION
ACCURAY 67461-003 PC BOARD EXCELLENT CONDITION
ACCURAY 64844-002 PRI PC BOARD EXCELLENT CONDITION
LOT OF 2 ACCURAY NA-B-8-082537-?001-A MICROSCAN CALIPER CALIBRATION KIT 58612
E2V Technologies CX1191D thyratron Accuray Cyberknife
ACCURAY 082132-001 SCANNER CONTROL BOARD MODULE CARD 58864
ACCURAY 086172-001 6 CHANNEL CHAN MULTIDROP OUT CIRCUIT BOARD MODULE CARD 58010
XYCOM CA3-USBCB-01





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