国产精品久久久久久久久,四季AV一区二区夜夜嗨,日韩精品无码中文字幕电影,www.五月婷婷.com

我們新研制出一種用于紙漿白度測定的智能白度儀，該儀表采用西門子公司生產(chǎn)的S7-224 CPU結(jié)合軟件功能進(jìn)行數(shù)據(jù)處理，具有較好的可靠性、重復(fù)性、精確度和穩(wěn)定性。為了使其能與其它智能設(shè)備之間實(shí)現(xiàn)通信，我們將通過現(xiàn)場總線技術(shù)把它連接到網(wǎng)絡(luò)中，使它成為造紙廠現(xiàn)場總線控制系統(tǒng)的一部分。

2.現(xiàn)場總線的選擇

  2.1現(xiàn)場總線技術(shù)的選擇

  現(xiàn)場總線集控制技術(shù)、計(jì)算機(jī)技術(shù)、通信技術(shù)于一體，是當(dāng)今自動化領(lǐng)域技術(shù)發(fā)展的熱點(diǎn)之一。這項(xiàng)技術(shù)可將多個(gè)智能控制儀表連接成網(wǎng)絡(luò)系統(tǒng)，實(shí)現(xiàn)分布式計(jì)算機(jī)控制，提高檢測和控制精度，改善系統(tǒng)的動態(tài)響應(yīng)速度，提高系統(tǒng)安全性，從而得到了廣泛的應(yīng)用。

  近年來，幾種有影響的現(xiàn)場總線技術(shù)已在一些特定的應(yīng)用領(lǐng)域里顯示出各自的優(yōu)勢。在此，我們選定了現(xiàn)為德國和歐洲標(biāo)準(zhǔn)的PROFIBUS（Process Fieldbus）現(xiàn)場總線。一方面由于它是目前數(shù)據(jù)傳輸率快的一種現(xiàn)場總線，傳輸率高可達(dá)12Mbps，另一方面它能夠很好的與西門子的傳動設(shè)備相配合，并與西門子PLC（Programmable Logic Controller）結(jié)合緊密且組態(tài)簡便。

  2.2 PROFIBUS現(xiàn)場總線簡介

  參照ISO/OSI參考模型,PROFIBUS現(xiàn)場總線只包含物理層、數(shù)據(jù)鏈路層和應(yīng)用層。由PROFIBUS-DP，PROFIBUS-FMS， PROFIBUS-PA組成PROFIBUS系列。

  PROFIBUS-DP：經(jīng)過優(yōu)化的高速、廉價(jià)的通信連接，專為自動控制系統(tǒng)和設(shè)備級分散I/O之間通信設(shè)計(jì)，使用PROFIBUS-DP模塊可取代價(jià)格昂貴的24V或0～20mA并行信號線。用于分布式控制系統(tǒng)的高速數(shù)據(jù)傳輸。

  PROFIBUS-FMS ：解決車間級通用性通信任務(wù)，提供大量的通信服務(wù)，完成中等傳輸速度的循環(huán)和非循環(huán)通信任務(wù)，用于紡織工業(yè)、樓宇自動化、電氣傳動、傳感器和執(zhí)行器、可編程序控制器、低壓開關(guān)設(shè)備等一般自動化控制。

  PROFIBUS-PA專為過程自動化設(shè)計(jì)，標(biāo)準(zhǔn)的本質(zhì)安全的傳輸技術(shù)，實(shí)現(xiàn)了IEC1158-2中規(guī)定的通信規(guī)程，用于對安全性要求高的場合及由總線供電的站點(diǎn)。

  本設(shè)計(jì)中采用的是PROFIBUS-DP標(biāo)準(zhǔn)，PROFIBUS-DP（或DP標(biāo)準(zhǔn)）是由歐洲標(biāo)準(zhǔn)EN50170定義的一種遠(yuǎn)程I/O通信協(xié)議。DP表示分布式外圍設(shè)備，亦即遠(yuǎn)程I/O。PROFIBUS-DP還用到了應(yīng)用層接口（ALI），ALI將過程對象轉(zhuǎn)換為通信對象。

Siemens BL 3p 15a B315 Bolt In Circuit Breaker
       Siemens B345 BL 3 pole 45 amp Circuit Breaker
       Siemens B335 BL 3 pole 35 amp Circuit Breaker
       Siemens B325 BL 3 pole 25 amp Circuit Breaker
       Siemens B120AF 1p 20a 120v Arc Fault Breaker 1-yr Warranty
       SIEMENS A5E00359595 BOARD A5E00359622 (A11)
       SIEMENS A5E00246214 BOARD (A11)
       Siemens 6EP1 332-2BA00 SITOP Power 4 Power Supply
       Siemens 48DH38A6S2 Bi Metal OL Relay
       Siemens 48ASU3M20 ESP100 Overload Relay Trip Class 20 270 AMP 3 Phase
       Siemens 3SE3 100 -0V AC1 10A
       Siemens 3RV1021-1DA10 Motor Starter 2.2-3.2A BC
       SIEMENS 100 AMP 3 POLE CIRCUIT BREAKER ED43B100 WA-94 FREE SHIPPING!
       PULLOFF SIEMENS SITOP POWER 10 SUPPLY 6EP1-334-1SL11
       LOT OF 9 SIEMENS 6ES7 322-1BH01-0AA0 DAMAGED DURING REMOVAL (D5)
       LOT OF 7 SIEMENS 6ES7 153-2BA01-0XB0 DAMAGED DURING REMOVAL (D5)
       ITE/Siemens ED43B050
       ITE Siemens ED41B045 1 pole 45 amp 277 volt Circuit Breaker
       GE Disconnect, 30 AMP, 20 HP, TH3361 Mod 4.
UN       SIEMENS ITE BQD160 277 VAC 60 A 1 Pole CIRCUIT BREAKER
UN       SIEMENS ITE BQD140 277 VAC 40 A 1 Pole CIRCUIT BREAKER
UN       SIEMENS ITE BQD130 277 VAC 30 A 1 Pole CIRCUIT BREAKER
Un       Siemens 3RT1023-1AK60 Contactor, 9 Amp, 3 Pole, 120 Volt
UN       ITE Siemens QT24020 120/240 VAC 40/20 A 4 (2/2) Pole CIRCUIT BREAKER
UN       ITE SIEMENS EE1B060 60 Amp 120 V 1 Pole CIRCUIT BREAKER
United Electric Type NJ21K Model 7676, 6-73, 0-25 Psi, Shipsameday, ZD#6
Two Siemens 3RV1421-4AA10 Motor Circuit Breakers 10 15 HP
Two Siemens 3RV1011-1JA10 Motor Circuit Breakers 5 HP
TRUMPH SIEMENS DIGITALE PIGGY BACK CIRCUIT BOARD CARD G34924-W1022-C010
Transbator Siemens 4AV 3995-0AA00, prim. 214-425V, sec. 24VDC, 4 Amp.
Trafo Transbator Siemens 4AM4041-5AT10-0C
TOUCHSCREEN GLAS GLASS FüR SIEMENS SIMATIC Panel PC 870 IL70 TOUCHPANEL 6AV7612
TI Texas Instruments U-06B PLC Base Unit U06B Backplane Rack Free Shipping!
TI Siemens CTi RCM-2030 RCM2030 Relay Contact Module PLC
Texas Supervisory Circuits 2.25V, TLC7725ID, 296-3280-5-ND, Lot Of 31, H#64
Texas Instruments/TI/Siemens Simatic 505-4808 120/220 AC Output Module/Card, PLC
Texas Instruments U-04B or Siemens U-04BJ 4 slot rack with 12 month warranty
TEXAS INSTRUMENTS SEMI IC80C517AN18      IC80C517AN18
TEXAS INSTRUMENT/SIEMENS 32 PT 110VAC INPUT MODULE 500-5055
Texas INS IC DRVR/RCVR RS-232, 296-9595-1-ND, MAX3221IDBR, Lot Of 43, E#86
TEC Siemens 550-767N TEC APOGEE FREE SHIPPING
T997 Siemens Simatic 6ES7 332-1BF01-0AA0 E-5
T881 Siemens Sirius 3RS1020-1DD
T69 Siemens Sinec 6GK1543-1AA01 E-5
T68 Siemens Sinec 6GK1543-1AA01 E-4 6GK1 543-1AA01 SPS
T67 Siemens Sinec 6GK1543-1AA01 E-3
T312 Siemens Simatic 6ES7 132-4BF00 Unbenutz versiegelt 6ES7132-4BF00 ET 200S
T1425 Siemens Simatic Eprom 6ES5 374-2KH21 E-1 Memory Card
T1139 Siemens Simatic 6ES7 954-8LC02-0AA0 6ES7954-8LC02-0AA0 FS01 Versiegelt
Surplus Siemens ITE ED41B060 60 amp 1 pole 480 volt Circuit Breaker
Surplus Panel Pullout Siemens BQ2B100 2 pole 100 amp Circuit Breaker
Surplus Panel Pullout Siemens BQ2B090 2 pole 90 amp Circuit Breaker
Surplus Panel Pullout Siemens BQ2B080 2 pole 80 amp Circuit Breaker
Square D FH16020A 125/277V 1 Pole 20 Amp Circuit Breaker (      in Box)
SQUARE D 2510 FW-1P FHP Manual Starter Nema 1 Enclosure Series A
SMC Solenoid NVFS2310-3DZ, NVFS23103DZ, Shipsameday, #1543AR
SM322 ES7-322-1BL00-0AA0 SIEMENS OUTPUT MODULE 32POINT DIGITAL 24VDC
SM321 ES7-321-1BL00-0AA0 SIEMENS OUTPUT MODULE 32POINT DIGITAL 24VDC
Skt Mtr 600V 200A 1Ph 3Wire SIEMENS ENERGY Panel Box Accessories SUAT417-XG
Six (6) Siemens Q22040CT 40-Amp Double Pole Two 20-Amp Single Pole Breaker
SITOR SIEMENS FUSE 3NE4 122
SITOR SIEMENS FUSE 3NE4 121
SITOR SIEMENS FUSE 3NE4 120
SITOR SIEMENS FUSE 3NE4 118
Simens Simatic S5 6ES5491-0LA12 Adaption Casing      !!
Siemens-Schütz,11KW,230V/AC,50Hz,3RT2026-1AP00,OVP,3RT2026-1AP00 3RT
SiemensLOGO!Power 6EP1311-1SH12 E: 01
Siemens-Landis & Staefa RAK122.0021M 55.13225.040 -un      /OVP-
SIEMENS-ITE D11CEU2 rotary handle (NIB)
SIEMENS-ALLIS TA3-K350 *      IN A BOX*
Siemens-Allis Static Trip II Type TI (2T)
Siemens-Allis MSP30L motor starter protector 4-6.3 amp
Siemens-Allis MSP30L Manual Starter Protector
Siemens-Allis MSP30J Motor Starter Protector 2.5-4 Amp
Siemens-Allis Current Limiting Fuse 48FM3R-4 2.4-4.8kV 100 Amp
Siemens-Allis 3ZA2312-1D Limit Switch Top Push Roller Snap Action 24-162-261-501
Siemens-3NP407-Recognized-Fuse-Holder
Siemens: AWD4420-5AD, 8WD4420-5AC and 8WD4420-5AB Stackable Light Set W
Siemens: 49AB01 - Aux. Contact, Side Mount, 1 NC., NEMA Size 00-4, Bundle 7-PACK
SIEMENS/TI 505-7339/5057339 INTERFACE MODULE ***NNB***
Siemens/Simatic 6ES7-194-4CB00-0AA0/6ES71944CB000AA0
SIEMENS/POTTER & BRUMFIELD CB SWITCH W31-X2M1G-10 UN       0615
SIEMENS/ITE/MURRAY Q320 20 AMP 3 POLE 120/240V 3-POLE CIRCUIT BREAKER
SIEMENS/ITE ED23B040 60A 240VAC CIRCUIT BREAKER ***NIB***
SIEMENS/ITE 150 AMP 3P BREAKER QJ23B150 D-27F
SIEMENS/BREGENHORN-BUTOW BOARD 302849-01 TYPE DBM2/X FOR SIPLACE M/N 80S20
Siemens,5SY6325-7,UL1077 SUP. PROT,6KA,3P,25A,C-TRIP
SIEMENS,3RT10241AP00,CONTACTOR, AC-3, 5.5KW/400V
SIEMENS,3RT10151BB42,CONTACTOR, AC-3, 3KW/400V
SIEMENS, TERMINAL BLOCK JUMPERS, 2 POLE, 8WA1895, LOT OF 159
Siemens, Overload Relay #3UA5900-2C, 16 to 25 Amp, 600Volt, 3 Pole, NIB
SIEMENS, LOW TEMP CUTOUT CONTROL RANGE 35/45F, CAT#134-1511,     
Siemens, ITE 25 Amp Circuit Breaker:, Inv 2707
Siemens, ITE 25 Amp Circuit Breaker (2707)
Siemens, GES7-195-7HB00-0XA0, Bus Module,
Siemens, GCA161.1U, Spring Return Electric Damper
SIEMENS, F2020,       , 600V, SIEMENS F2020 20A 600V 2P       
SIEMENS, EE1B015 N,      , 120V, SIEMENS EE1B015 N 15A 120V 1P      
Siemens, Contactor TJ500-0BB4
SIEMENS, CFS361J, 30A, J FUSE PROV. 200KAIC
SIEMENS, CC2-B030 U,       , 277/480V, SIEMENS CC2-B030 U 30A 277/480V 2P       
SIEMENS, CC2-B020 U,       , 277/480V, SIEMENS CC2-B020 U 20A 277/480V 2P       
SIEMENS, AIR DUCT HOUSING FOR SERIES 11, PART#AD-11PC,       IN BOX
SIEMENS, A1106030023, RES, SNBR, NON-IND, 200OHM, I10%
SIEMENS, 8WH3003-0AF00, TERM BLOCK,IDC,THRU-TYPE,2.5,GRAY,3-CONN 50/BX
SIEMENS, 6XV1-850-0BH50, CABLE ITP STANDARD 9/15 5 M
SIEMENS, 6SY70106AA01, NTC THERMISTOR, W98628S1001C24
SIEMENS, 6FX5002-2CD01-1AD0, SIGNAL CABLE, PREASSEMBLED 6FX50022CD011AD0
SIEMENS, 6ES7972-0BB42-0XA0, PROFIBUS CONNECTOR, 12MB, T CBL, PG SOCKET
Siemens, 6ES7 321-1BH02-0AA0, Input Card,       
SIEMENS, 6EP1332-1SH41, POWER SUPPLY 2.5AMP 24VDC
SIEMENS, 5SY6332-6, UL1077 SUP. PROT, 6KA, 3P, 32A, B-TRIP
SIEMENS, 5SQ32701BA16, N-TYPE MCB, 400VAC, 4.5KA, 2-POLE, 16A
Siemens, 5SM3744-6, FI-SCHUTZSCHALTER TYP A 40A,400V, 500MA,
Siemens, 5SM3742-6, FI-SCHUTZSCHALTER TYP A , 25A ,IFN 500MA ,400V
SIEMENS, 52SA7ADN, SELECTOR SWITCH 2-POS LESS LEVER
SIEMENS, 52PT6DAA, PUSH TO TEST PILOT LIGHT FULL VOLTAGE TYP. 24 VOLTS, AC/DC
SIEMENS, 52PT6D5A, PUSH TO TEST PILOT LIGHT
SIEMENS, 52PT6D3AB, PUSH TO TEST PILOT LIGHT FULL VOLTAGE 24 VOLTS AC/DC
SIEMENS, 52PL4L3, PILOT LIGHT, LED MOD 24V, GREEN, PLASTIC
SIEMENS, 52PL4K9, PILOT LIGHT TRANSFORMER TYPE 600VOLTS AC, AMBER
SIEMENS, 52PL4K5, PILOT LIGHT TRANSFORMER TYPE 600 VOLTS, AC, BLUE
SIEMENS, 52PL4G9, PILOT LIGHT TRANSFORMER TYPE 123-130 VOLTS, AC, AMBER
SIEMENS, 52PA2D3A - PUSHBUTTON, MTD, GRN, 1 3/4"MTL ILL, 2POS
SIEMENS, 52PA2D2A, PUSH PULL BUTTON,MTD,RED,1 3/4"MTL ILL,2POS
SIEMENS, 52BP2V2, PUSHBUTTON,MTD,RED,2 1/2" PLASTIC ,2POS
SIEMENS, 3TX4210-0H -- LABEL, TERMINAL STRIP, BLANK, 9X20MM
SIEMENS, 3TF34-0AP6, CONTACTOR
SIEMENS, 3RT1-033-1BB40, CONTACTOR, NONREV, S2, 28A, 24VDC, 3P, SCRW
Siemens, 3RG4601-1AB07, Proximity Switch
SIEMENS, 3LD1218-0TB53, 30A 3P ROTARY DISC SW 3LD12180TB53
Siemens, 192-202, Thermostat
SIEMENS-(LOT OF5)-B120 20 AMP SINGLE POLE 120/240V CIRCUIT BREAKERS-(     )
Siemens Zone Valve Actuator 254-01104 1/2" Valve 2 way NC CV=1 SSB81U
Siemens Zone Valve Actuator 245-00211 1/2" Valve 2 way NC CV=2.5 SSA61
Siemens Zeitrelais 3RP1525-2AP30,230V/AC+24VAC/DC 3RP,NEU,OVP Zeit-Relais
Siemens Zeitrelais 3RP1525-1AP30 GEB
Siemens Zeitrelais 3RP1505-2BW30 24-240V/AC/DC 0,05s-100h NEU, OVP Relais 3 RP
Siemens Zeitrelais 3RP1505-1BW30 24-240V/AC/DC 0,05s-100h NEU, OVP Relais 3 RP
Siemens Zeitrelais 3RP1505-1AP30 GEB
SIEMENS X-RAY GENERATOR CIRCUIT BOARD MODULE 73-51-943 X1423 D121 7351943 X1423
SIEMENS X-RAY GENERATOR CIRCUIT BOARD MODULE 1306-137-55 1306.137.55 1306-136-01
SIEMENS X-RAY CIRCUIT BOARD CARD 83-53-039 X1423 D44 8353039 X1423
SIEMENS X-RAY CIRCUIT BOARD CARD 73-53-782 X1423 7353782 D48
Siemens Wireless Terminals Toshiba T6K03 Display Driver Software Integration Man
Siemens Wire Grip Kit TA1-F350 For F Frame Breaker *Lot of 4*       Surplus
Siemens WINCC FLEXIBLE 2008 RUNTIME Single License/ WinAC RTX 2010 Single Licens
SIEMENS WB3100 Outdoor Breaker Enclosure