3A99860G01西屋等你来

3A99860G01西屋等你来

I/O总线，它把多种I/O信号送到控制器，由控制器读取I/O信号。这称为I/O总线。I/O板相互之间并不交换数据。I/O总线的速率是不高的。从几十K到几兆不等。这与计算机技术的发展情况有关。80年代初是20K，80年代中期是40K、80年代末期是80K，90年代是几兆。为了快速，是并行总线。采用并行总线，其I/O模件必需与控制器模件相邻。采用串行总线的情况下，I/O板和控制器之间的距离也要比较近才行。把控制器模件和I/O模件装在一个机柜内或相邻的机柜内。远程I/O应该采用现场总线。如CAN、LONWORKS、HART总线等。现场总线是90年代初发展起来的。在I/O板中从硬件来说应该有能接收现场总线来的信号的输入、输出板。从软件来说在控制器中应该有读取和写到现场总线信号的功能块。在DCS系统中，远程I/O采用HART总线比较多。比如现场的变送器，离控制器机柜距璃比较远，把16个变送器来的信号编成为一组，用HART总线把信号送到控制器，空制器同时读进16个变送器来的信号。控制器和变送器两者距离可达1公里以上。在从美国、欧洲进口的DCS系统中，几乎都有HART协议板。实际应用中，远程信号是比较多的。如水泥厂，回转窑的窑头与窑尾，两者距离有几百米，如果在网络上设两个结点，需要两套结点的接口模件，接口模件的费用比较高，如果设一个结点，在地理位置上不管结点安排是在窑头还是窑尾，都需要采用远程I/O。
在DCS网络中，数据传输是以信息帧的形式传输的。它是同步发送星息。半双工发送。双工发送的极少。每一帧信息都有信息头，信息尾，信息帧中紧跟首旗的是地址，其中包括信号发出的结点的源地址，如结点号、模件号、功能块号以及接收信息的结点的目的地址，如结点号、模件号和功能块地址。信息帧的中间是数据，再后面是校验。校验zui多的是采用循环冗余校验。CRC码是一种高效能的检错和纠错码。数据在传输过程中，可以是一帧，也可以是两帧，如果是两帧，头帧是旗，第二帧才是数据。zui长的一帧信息可长达200多个字节。采用存储转发协议的网络中，当一个结点发生故障时，把这个结点旁通，让信息通过。

New Firestone Airide Airmount Actuator W02-358-7002

New Parker Air Cylinder .75BFDSRMBSY301.030 GD216575

Reliance Electric CLDR Card 0-51865-14 05186514 Used

Phoenix Contact Power Supply QUINT-PS/1AC/24DC/10 240 VAC 24 VDC 10 A Amp New

Unitorq Pneumatic Actuator M52 K4 DLS 150 PSI

Kuhnke Cylinder 0504 63033 050463033 39.248.050 NEW

Kuhnke Cylinder 4205 65905 39.248.020 420565905 NEW

BIMBA Air Cylinder D-65407-a-5 D65407A5 1/2" stroke NEW

REXROTH 12 STROKE 3/4 NPT HYDRAULIC CYLINDER 1-3/4 BORE

Compact Automation Products Cylinder RG073

Parker Air Cylinder GD547581 C GD547581C 10" stroke NEW

New Unknown Name Tripping Actuator EX E X 

SCHRADER BELLOWS 3- WAY ACTUATOR 1196-0089 3/8"NPT

New Sheffer Pneumatic Cylinder 5C20F-10A Stroke 7-1/4

NEW REXROTH 10500078 CD706100/45-425 PNEUMATIC CYLINDER 4" BORE 16-3/4" STROKE

JOHNSON CONTROLS D-3153-1 8-13 PSI SPRING DAMPER ACTUATOR NEW

ARO Economair 2440-1009-070 Cylinder 24401009070 New

Reliance Electric CCC Card 0-52840-44 05284044 Used

FESTO DSNU-5/8"-0.5"-P-A-B 5" - 5 1/2" AIR PNEUMATIC CYLINDER NEW

NEW PILZ 514120 ACTUATOR PSEN 1.1-20

McNeil Cylinder Seal Kit W3-10126-003 W310126003 4.5"

Diablotek ATX Power Supply DA Series PSDA400 400 Watt 115/230 VAC SEALED 

BIMBA LTC-044-D LTC044D STAINLESS 7 7/8" - 11 7/8" AIR PNEUMATIC CYLINDER NEW

BIMBA STAINLESS D-64949-A-1 D64949A1 3 5/8" - 4 5/8" AIR PNEUMATIC CYLINDER NEW

SCHRADER BELLOWS ECONO RAM II 2" CYLINDER FW2C101621

hydraulic CYLINDER 76" EXT 43" COMP 33" STROKE 

NEW SMC NCMKB150-0500S AIR CYLINDER 1.70MPa 250psi 

Parker Air Cylinder S 1.12x.500 1.12 x .500 NEW

McNeil Cylinder Seal Kit W3-10124-3 W-310124-003 3.5"

FABCO-AIR SQF-121X2K AIR PNEUMATIC CYLINDER NEW

HYDRAULIKA ZN160.D-ME6 HYDRAULIC CYLINDER 2 1/4" SHAFT 13" STROKE 3" BORE

 Large Air Cylinder 3 1/2"x9" STROKE 1" diameter NEW

NEW LOCTITE ACTUATOR VALVE ASSY 97241 5DEFA

ALLENAIR CYLINDER  A-BC 2" x 5" 5/8" NEW

AIRPRO 250A1TS200S1N140AO 250A1 AIR PNEUMATIC CYLINDER

FESTO DIRECTIONAL START VALVE HEL-D-MAXI 170692

EL-O-MATIC PNEUMATIC ACTUATOR SR 15-14 Ser. P New

KOGANEI AIR CYLINDER DA25X7-1485W  DA25X71485W 

FESTO ORIGINAL-WEARING PARTS KIT 104169

FABCO-AIR SQF-121X2  AIR PNEUMATIC CYLINDER NEW 

Schrader Bellows Cylinder .75DSR00.5 MX 75DSR00.5 MX 75DSR005MX 1/2" Stroke NEW

FESTO ADV-20-50-A ADV2050A 93mm - 143mm 10 BAR AIR PNEUMATIC CYLINDER NEW

SCHRADER PA-2 PAA108121 1.250 AIR PNEUMATIC CYLINDER

Compact Air Cylinder ASFH34X6-EX12 ASFH34X6 6" str NEW

Herion SS Actuated Angle Seat Valve 8270300.000 Stainless New

JOHNSON CONTROL ROTARY ACTUATOR 24V M9220-BGA-3 20NM

ALLENAIR AN 3 X 7 AN3X7 17" RETRACTED 24" EXTRACTED AIR PNEUMATIC CYLINDER NEW

MANNESMANN/REXROTH CYLINDER AD223935 J M-10D-10 M10D10

Servomech ATM Actuator ATL 20 C100 M50B4 1340RPM .06 KW

FESTO AEVUZ-20-10-PA AIR PNEUMATIC CYLINDER NIB

Koganei Air Cylinder PDATS16X12-7-847W PDATS16X0-7-847W

Johnson Controls Diaphragm Actuator V-3000-1 w. 3/4" NPT Brass Bronze Valve New

REXROTH MECMAN 522 663 450 0 5226634500 7 1/2" - 9 1/2" AIR PNEUMATIC CYLINDER 

New Honeywell Pneumatic Damper Actuator MP909E Stroke 4

COMPACT AIR PRODUCTS IMC ARD4X14 ROUND CYLINDER NEW

FESTO DGS-16-10 P 2 87R AIR PNEUMATIC CYLINDER NEW

NO NAME CS300WCE115A VALVE ACTUATOR  .6 AMP 115 VOLT

HYPERCYL/HYPER 6277 CYL CYLINDER 3" STROKE

REXROTH 0 822 410 200 0822410200 3 21/32" - 4 21/32" AIR PNEUMATIC CYLINDER NEW

Cylinders Valves Inc Air Cylinder 6" Stroke RC1500 1/2"NPT NEW

Bibus AG Tension Cylinder SEA-20/50 0201 A 49mm Stroke 

NEW MOTION CONTROLS AIR PNEUMATIC DOUBLE-ACTING CYLINDER 4 1/2" STROKE 3" BORE

FABCO-AIR F-2000D02-01A AIR PNEUMATIC CYLINDER NEW

CHICAGO CYLINDER CORP AIR CYLINDER D-01745 NEW 

NEW FABCO AIR MINI PANCAKE CYLINDER B7X NEW

New Bimba Air Cylinder D-20995-A-4225 D20995A4225 

BIMBA DOUBLE-WALL DW-3118-2 DW31182 23 1/2" - 41 1/2" AIR PNEUMATIC CYLINDER NEW

FABCO-AIR PSX1-0.750 1 15/16" - 2 11/16" AIR PNEUMATIC CYLINDER NEW

BIMBA STAINLESS S/S 175-D 175D 9 1/2" - 14 1/2" AIR PNEUMATIC CYLINDER NEW

SWAGELOK VALVE SS-63TS12-LD WORCESTER ACTUATOR 10 39

INDUSTRIAL GAS SPRINGS GS2596-1 19 12 AIR PNEUMATIC CYLINDER NEW

URBAN CETOP 25/65 346214 10 BAR PNEUMATIC CYLINDER NEW

Rexroth Cylinder 1/4" strk 522 602 010 0 5226020100  NEW

KOGANEI AIR CYLINDER DA25X7-1485W DA25X7 1485W  NEW

KOGANEI AIR CYLINDER Slim DAB20X75-2  DAB20X75-2 NEW

KOGANEI AIR CYLINDER DA25X7-1485W  DA25X7-1485W NEW

Lin-ACT A4 Head Cushion Kit CH08A402 New

SMC CLAN100-PS Seal Kit CLAN100PS  New

INGERSOLL RAND PREMAIR SCC25-GXMXX-004EQ SCC-GXMXX-004 SCCGXMXX004 CYLINDER NEW

NUMATICS TD-579952-1 S4AK-30A8U-AAA2 35 1/4 TO 65 1/4 AIR PNEUMATIC CYLINDER NEW

BRAY CONTROLS PNEUMATIC ACTUATOR 90 0830-11320-532 90083011320532

LIN-ACT 01.12 ST-1.12X0.75-4 AIR PNEUMATIC CYLINDER NEW

BIMBA STAINLESS S/S MRS-123-DXP 8 3/4" - 11 3/4" AIR PNEUMATIC CYLINDER NEW

FESTO PNEUMATIC CYLINDER DMM-10-30-P-A DMM1030PA NEW

Koganei Air Cylinder  PDATS16X0-7-847 PDATS16X12-7-847

BOSCH CYLINDER 0 822 021 020 0822021020  STROKE 1-1/2"

New Camozzi Cylinder QP2A050A015 Stroke 15

WORCESTER MK001 MODEL A 34S R A34SR PM3S5250 AIR PNEUMATIC VALVE ACTUATOR NEW

NEW ROSE KRIEGER 18" 10MM SHAFT POSITIONER 30340000430

BIMBA STAINLESS S/S 242 7 7/8" - 9 7/8" SPRING RETURN AIR PNEUMATIC CYLINDER NEW

SMC PNEUMATIC CYLINDER CDQ2KB20-30D CDQ2KB2030D NEW

FESTO DMM-26-30-PA L508 AIR PNEUMATIC CYLINDER NEW

Mannessman Rexroth 1/2" stroke Air Cylinder M-7DP-05 

New Rexroth Air Cylinder 521 165 001 0 5211650010 150PS

FESTO ADVULQ-25-5-PA JB41 AIR PNEUMATIC CYLINDER NEW

URBAN CETOP 20/35 10 BAR AIR PNEUMATIC CYLINDER NEW

FESTO DNC-32-80-PPV-A 9" - 12" AIR PNEUMATIC CYLINDER NEW

FESTO ESNU-5/8"-1 1/2"-P-A ESNU58112PA 271682 AIR PNEUMATIC CYLINDER NEW

BOSCH 0 822 243 011 0822243011 27 1/2" - 47" AIR PNEUMATIC CYLINDER NEW

NEW FESTO KNIFE CYLINDER 164992 EZH-2.5/9-20B SERIES K508

SHEFFER CLH-D3Y CLHD3Y 6 7/8" - 9 7/8" AIR PNEUMATIC CYLINDER NEW

NO NAME CS300WCE115A VALVE ACTUATOR 115 VAC .6 AMP 

BIMBA FLAT-1 F0-091.75-2RP3 2 3/4" - 4 1/2" AIR PNEUMATIC CYLINDER NEW

ARO 0440 1009 080 AIR PNEUMATIC CYLINDER 18" - 26" AIR PNEUMATIC CYLINDER 

BRAY VALVE & CONTROLS 140PSI ACTUATOR 30-080021-10-5

REXROTH/MANNESMANN CYLINDER 521-018-019-0 5210180190

COMPACT AUTOMATION PRODUCTS SD34X12 DUAL ACTING AIR PNEUMATIC CYLINDER NEW

Compact Cylinder ASFHD34X112 EX 1-1/4" 1 1/2" str NEW

FESTO ADN-32-20-I-P-A ADN3220IPA AIR PNEUMATIC gripper CLAMPING APPARATUS 

Koganei Air Cylinder TBDA16X50 TBDA 16X50 2.15" .31" 

PARKER SERIES MA 03.25 B BMAU14 5.000 03.25BBMAU14 AIR PNEUMATIC CYLINDER NEW

URBAN CETOP 20/50 10 BAR AIR PNEUMATIC CYLINDER NEW

JOHNSON SERVICE 9007-32280 8-13 SP MF DAMPER ACTUATOR

FABCO-AIR SQF-121X1/2-1B-E-H-R1 PNEUMATIC CYLINDER NEW

Koganei Air Cylinder PBDA 16X6-7 PBDA16X6-7 PBDA16X67

SMC AIR CYLINDER ERSDQB32-20D NEW ERSDQB3220D

HYDRO-LINE CORDSET CYLINDER PART CABLE C-468 C468 C4686

HOERBIGER ORIGA P126 65" AIR PNEUMATIC RODLESS CYLINDER 39" APPROXIMATE STROKE

WARNER ELECTRAK 2000 B1A101-B7510-TRN LINEAR ACTUATOR

Hydro-Line Seal Kit 414135 414-135 AJK-403 AJK403  New

PHD AP3/4X1 236624-01 4 9/16" - 5 9/16" AIR PNEUMATIC CYLINDER NEW

Humphrey Air Cylinder 75-DP-2 75DP2 2" stroke NEW

BIMBA M-040.5-D M-040 5-D M0405D 4" - 4 1/2" AIR PNEUMATIC CYLINDER NEW

NEW BRAY DOUBLE ACTING PNEUMATIC ACTUATOR 90-0630-21320-532 90063021320532

REXROTH MECMAN 522 674 480 0 AIR PNEUMATIC CYLINDER NEW

LIN-ACT 62825-1 MD1.125X1-1F DUAL ACTING CYLINDER NEW

FESTO DFM-50-100-P-A-GF DFM50100PAGF AIR PNEUMATIC ACTUATOR GUIDE UNIT NEW

ARO PROVENAIR CYLINDER 3925-1009-1-050 5" STROKE NEW

Schrader Air Pneumatic Cyclinder WD423910 B 10-1/2" - 14-1/2" 03.00 DSR 4.000

PARKER 2" VITON CYLINDER BODY SEAL KIT CB202HL005 NEW

AIRPRO Cylinder 250A-1CC150S3B0350-AB 2 5/8" stroke NEW

BIMBA FLAT-1 FOS-091.75-4EE0.375 FOS091754EE0375 AIR PNEUMATIC CYLINDER NEW

Cleveland Tramrail 361N Current Tap 16011 LD-11

FESTO PNEUMATIC SLIDE SLIDING TABLE CYL. SLT-20-40-P-A

NO NAME COPY LATHE CYLINDER STROKE 1-1/2" RHR NEW

LIN-ACT Air Cylinder 4x14.5 LS-A40E-4.00X14.500-3-J NEW

REXROTH 80/ 400 MAX 10 BAR 0 822 244 010 0822244010 AIR PNEUMATIC CYLINDER NEW

HYTORK EIA-XL0681-S80-A0D AIR PNEUMATIC ACTUATOR 116PSI W/ STAINLESS S/S VALVE  

Rexroth Cylinder 3/4" strk 522 604 425 0 5226044250 NEW

Mosier Tiny Tim Cylinder S-3435-1 S34351 1/2" str NEW

HUMPHREY 8-D-1 1/4 M 1-1/8" STROKE AIR CYLINDER NEW

Norgren Pneumatic Cylinder RM/53420/75 A 74mm Stroke

FABCO-AIR SQL-121X3/4-E AIR PNEUMATIC CYLINDER NEW

PARKER PV33D-BB2-B 150 PSI ROTARY ACTUATOR NEW