AS-884A-301現貨 in stock! 歡迎來電咨詢~！！

AS-884A-301,

AS-884A-301

作為火電廠安全經濟運行主導因素的熱控自動化設備DCS系統，近年來得到了普遍應用，為火電廠機組安全、穩定的運行起到了積極的作用。但是，DCS系統的安全性和可靠性還有待提高，在運行過程中經常會出現這樣或那樣的故障，這些故障的出現，導致了發電機組的非計劃停運，給發電企業造成不應有的損失。
　　1、DCS系統常見的故障
　　隨著工業生產自動化的不斷興起、過程控制要求的日益復雜，一種綜合控制系統――DCS系統應用而生了。由于目前各火電廠對DCS系統的應用水平的限制，系統在運行過程中難免會出現故障。常見的DCS系統故障有：電源系統故障、硬件(模件)故障、系統軟件故障和通信網絡系統故障。
　　1.1電源系統故障
　　電源故障是DCS系統的致命故障，一旦電源出現故障，不僅整個系統會停止運行，而且還會導致機組的跳閘，造成非計劃停運。
　　1.1.1電源系統出現故障的主要原因
　　電源方面的問題比較多，一是備用電源不能自投，雖采用UPS和APS雙路互為備用的供電方式，但在轉換時也會出現瞬間失電，導致機組跳閘;二是保險配置不合理及DPU電源內部故障等造成電源中斷，導致系統運行的停止;三是穩壓電源波動引起保護誤動及接插頭接觸不良導致穩壓電源無輸出;四是有的系統整個機柜通過一路保險供所有輸入信號或一路電源外接負載很大，導致模件的損壞;五是系統電源未采用UPS供電，冗余備用就更無從談起。
　　1.1.2電源系統故障應采取的防范措施
　　要保證DCS系統的安全、穩定，首先要具備合理的電源布置，其次要選用高質量的電源模塊，并要保證較高的冗余率。再次是注意觀察電源的輸出電壓，防止出現波動。第四是對電源實行壽命管理，該更換的時候必須更換，絕對不允許等到電源出現了故障的時候才更換。
　　1.2硬件(模件)故障
　　DCS系統的硬件(模件)卡件可分為處理器模件、I/O模件及通訊模件三大部分，這三大模件的功能各自不同，常見的故障部位為過程通道和人機接口。
　　1.2.1硬件(模件)出現故障的主要原因
　　①過程通道故障也就是I/O卡件故障。引起I/O卡件發生故障的第一方面的原因是卡件因長時間工作而出現老化和損壞，這種工作的發生，一般是隱藏性的，只有參數出現異常，系統才會報警;第二個方面是連接線松動導致部分I/O模件與主機的通信中斷，在這種情況下，系統會馬上做出反應，出現報警;第三個方面是外界強電信號竄入形成干擾而導致通道故障的發生。
　　②諸如球標和控制操作出現失靈和實效以及操作員站出現死機、鍵盤和打印機出現工作不正常的現象都屬于人機接口故障。
　　球標操作失靈的原因有裝置因長時間工作發生老化或者被浮塵或油膩污染，致使觸點不能實現自行通斷，也或是電纜插頭接觸不良造成與主機的通信斷路。
　　控制操作實效的主要原因是因球標的操作信號不能改變過程通道的狀態，有三種可能：其一可能是過程通道硬件發生故障;其二可能是操作員站所用軟件的缺陷;其三是設備超負荷或者過多地打開窗口，導致不響應。
　　操作員站死機的原因基本與控制操作失效的原因相同。
　　鍵盤工作不正常的原因有：鍵盤組態出現錯誤、接觸不良、連接電纜松動或者在啟動主機時誤動了鍵盤，造成啟動缺失。
　　打印機出現工作不正常的原因：或者是配置不合理，或者是因對打印機實施屏蔽而造成的。

上億庫存，國內外近千個倉庫，公司部分產品型號如下，歡迎聯系哦~！

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IC693CHS397LT Base, CPU, 5 Slots, Use With CPU331/CSE331 and above (LT)

IC756RDV001J-97 DV Development - Irix Op Sys Addt'l User, Japanese, Version 9.7

IC800VMCE050 Encoder cable for 100 W to 750 W VersaMotion servo motors- 5 meter

SLC/1746 System 1746-F9 FUSE FOR CTLG # 1746-OAP12 OUTPUT MODULE

Distributed I/O 1794-IP4 4-CHANNEL 12/24V PULSE COUNTER INPUT MODULE

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Operator Interface 2707-MVP232 MICROVIEW, PANEL MOUNT, 2 LINE LCD, RS-232

Support 9357-DNETMD3R SUPT REINSTATEMENT CONTRACT FOR 9357DNETMD3E

Support 9361-VBXS SUPPORT RENEWAL CONTRACT FOR 9361-VBX

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RSI Software Products 9301-2SE2403FRE RSVIEW32 WORKS 32K WITH RSLINX (FRENCH)

RSI Software Products 9358-B03UB1 UPGRADE: IN-SUPT: RSBIZWARE BATCH 03 UNT TO BUNDLE

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Motion Control 2090-UXNFBN-S03 CABLE,ULGRF50ON-FLEX,MOTOR FEEDBACK,N,3M

CBL-146 Cable.GE Series 90 PCM and COMM port 2 (RS-422)

IC610CHS110RR Rack, 115/230Vac Power Supply (5 Slots)

IC800SLA0202 200W, 230 VAC SL Servo Amplifier

OC647IFGLBLCLN010M-51 iFIX WebSpace Client v5.1 - Additional 10 Users

20AD2P1A3AYNNNC0 PowerFlex 70 AC Drive 2.1 A at 1 Hp 20A

20DD011A0EYNANANE PowerFlex 700S AC Drive 20D

20P21AD6P0RA0NNN PowerFlex 6 A DC Drive

2711-NL9 PanelView 1000C Ser D Replace Backlight

280-PWRM22H-M10 ArmorStart Three-Phase Power Media

3G3JV-A4007 3.6KVA 3.4A 0.75KW 三相AC380-460V/50HZ/60HZ

1492-MCAA160 60 A UL489 Miniature Circuit Breaker

1494U-J60-CR-M Cable and Rod Disconnect Kits

軟啟動器 3RW44552BC34

Safety Advanced V14 6ES7833-1FA14-0YF5 Upgrade DS V5.4 -> Safety Adv. V14 SP1

1585D-M4UBDM-35 Ethernet Media M12, Patchord

1756-IRT8I ControlLogix 8 Point RTD/Thermocouple In

1797-IRT8 FlexEx 8 Point Temperature Comb Module

194E-E40-1753-6G 40 A 194E Load switch

2090-CFBM6DD-CCAA01 TL-Series 1m Feedback Cable

2090-MPPC-S MP-Series Power Connector Kit

BC646MDA075 View Development/Runtime 75 I/O with Proficy GlobalCare Complete

GC647ABK001 GC Spare Key

HMI-CAB-C116 CABLE UNI-TELWAY

IC641SWM706 Logicmaster 90-70 Std Comm/ 3.5 inch disks + paper docs.

IC647IFCLNTS010C iFIX iClientTS 10 Additional Users (M1Component Part)

IC660EBA103RR Thermocouple, 115Vac/125Vdc Power, Electronic Assembly

IC695PRS015 Pressure Transducer module. The serial port communicates with up to 15 Honeywell LG1237 Smart Pressure Transducer sensors. Requires firmware/software 6.5 or higher.

IC756WRE049J-99 DataViews Runtime for Windows 25-49, Per User, Japanese, Version 9.9

FlexLogix System 1794-IM8 220V AC INPUT MOD, 8 PT.

PLC-5/1771 System D1785-10.6 CONTROLNET PLC5 PROGRAM. CONTROLLERS QUICK START

Process Control 1757-PLXSIFN PLX MODICON PLC, MODBUS RTU QUICKBUILDER INTERFACE

Operator Interface 2711P-B10C6B2 PV PLUS 1000, KEY/TOUCH, RIO/DH, AC PS, EXT MEM

Support 9310-TSTNDR SUPT REINSTATEMENT CONTRACT FOR 9310TSTNDENE

Support 2705-ND1S SUPT RENEWAL CONTRACT FOR 2705ND1

Support F1785-L40BSERB FIRMWARE UPGRADE FOR 1785-L40B PLC5 PROCESSOR MODU

RSI Software Products 9301-2SE2300KOE RSVIEW32 WORKS 1500 (KOREAN)

RSI Software Products 9701-VWSB250JPU2 RSV SE STATION 100- 250 DISPLAY UPGRADE(JAPANESE)

RSI Software Products 9399-PLC5MAN PLC 5, 6200 SERIES MANUAL SET(FOR 5.2 REL + NEWER)

Motion Control 2098-DSD-150-SE DRIVE, 65A/150A, ULTRA3000 W/SERCOS

BC646MDB300 Logic Developer PC w/Runtime 300 I/O

IC300MIX902 8 DC Inputs (12/24vdc), 8 DC Outputs (5/12/24vdc,0.5A pos. logic with ESCP) and 4 channels Analog Inputs, voltage (0-5vdc, +/-5vdc, 0-10vdc, +/- 10vdc), 12 bit; 2 channels Analog Outputs, voltage (+/- 10vdc)

IC752SKT003RR Datapanel H Starter Kit: Includes Datapanel H (DPH000), download & communication cables, WinCfg, user & programming manuals

MTR-3S84-G-R-0-E-SRR Servo Motor with Seal

ZA06B-6120-H045 PSM-45HVi 45 kW high voltage power supply module for Alpha servos

20CC300A0ANNBNG0 PowerFlex 700H AC Drive 20C

20G1ABF265JN0NNNNN PowerFlex 755 AC Packaged Drive

25A-D043N114 PowerFlex 523 22kW (30Hp) AC Drive

2711P-T6C20A8 PanelView Plus 6 6 Color Touch AC

6SE6440-2UD22-2BA1 2.2KW

1492-JTC3K 2.5 mm Thermocouple Terminal Block

1492-XIM120-8R BUL.1667-PANELCONNECT INPMOD,INTERFACE

軟啟動器 3RW44241BC45

通信模塊 6ES7 541-1AD00-0AB0 CM：PtP RS232，高性能通訊模塊

1585-C4UB-S300 1585 Ethernet Cable

1746-OV32 SLC 32 Point Digital Output Module

1790-0V16X CompactBlock LDX 16 Expansion Block

194E-A-P22 194E 2 NO-2 NC Auxiliary Contact Block

20-PP09042 WIRE SET ASSY NON-REGENERATIVE FRONT END

2090-CSBM1DF-18AA07 Kinetix Cable Single DSL 2090-Series

20AC030F0AYNANC0 PowerFlex 70 AC Drive 30 A at 15 kW 20A

GC-8459-SI-RN SI Consignment System Renewal (12 month license)

HE200TIM100 GPS time server of HE693SER300:provides time synchronization between s eperate racks or locations

IC600KD512RR Color Operator Interface Terminal/ 12 inch CRT

IC647HSTES150KM Historian Enterprise Server 150000 Points (M4 Key)

IC647YKGM YKG:Johnson Yokogawa DARWIN

IC694ALG392 Output module analog 8 points, voltage/current.

IC756SDV000E-99 DV Development - Solaris Op Sys, English, Version 9.9

MicroLogix 1200 System D1762-RM001CENP MICROLOGIX 1200&1500 INSTR.SET REFERENCE MAN.

PLC-5/1771 System 1771-RTP3 HIGH RESOLUTION ISOLATED ANALOG SERIES

Distributed I/O 1794-IE4XOE2 ANALOG COMBO MODULE, 12 BIT, 4 INPUT/2 OUTPUT

Communications 9399-WAB32GRFR RSLINX GETTING RESULTS GUIDE (FRENCH)

Support 6203-PLC2AS SUPT RENEWAL CONTRACT FOR 6203PLC2A

Support 9358-BIZUC4PS SUPT RENEWAL CONTRACT FOR 9358BIZUC4PENE

Support F1771-IFESERA FIRMWARE UPGRADE FOR 1771-IFE I/O MODULE

RSI Software Products 9324-RLD000ESE RSLOGIX 5000 SERVICE EDITION, ESP

RSI Software Products 9301-2SE350JPU1R RSVIEW32 RUNTIME 32K-100K UPGRADE OUT-SUPT (JP)

RSI Software Products 9358-HSTS2500U1R UPGRADE: OUT-SUPT: HISTORIAN 150 TO 70K TAG

Motion Control 8720SM-015S2EBS2 15 KW/41.5 AMP, 460 VAC, AC MOTOR WITH SRM60 ENC.

8162 SLDERLSS Field CONN Adapter, Used W/4162. RIBB CBL O/I For Data LNS & Multiplex

IC200MDL243 INPUT 120VAC ISOLATED, 16 POINTS

IC697CMM741RR Series 90-70 MMS/Ethernet Lan Interface

MTR-1324-E-A-E-0RR Stepping Motor Nema34 Encoder

Z44C741863-001 2 meter cable for Alpha amplifier battery kit

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20G11NC2P1JA0NNNNN PowerFlex 755 AC Packaged Drive

22F-D4P2N113 PowerFlex 4M- 1.5 kW (2 HP) AC Drive

NWBM85S485 Quantum MBUS+ PROG BRIDGE/MUX SUPRS485

294D-FD4P2Z-G1-3-SB Variable Frequency Drive

S82F-1524 220VAC，容量：150W輸出 24V 7A 已停產

1492-SPM3B070-N MCB Supplementary Protector 7 A

軟啟動器 3RW40271BB05

電機啟動器 3VU16403CN00

150-F60NBD SMC Flex Smart Motor Controller

1734-EXT1 POINT I/O Bus Extension Cable

1783-BMS10CGL Stratix 5700 10 Port Managed Switch

193-EIO-CM-C55 E300/E200 100-C55 Contactor Coil Module

20-750-CNETC PowerFlex 750 ControlNet Adapter

2090-CPWM7DF-10AF30 MP-Series 30m Servo Power Cable

2098-DSD-005-SE Ultra 3000 0.5kW with SERCOS Servo Drive

FF-CONF-BUNDLE Proficy Process Systems Fieldbus Linking Device plus NI Tool from Softing

GFK-2071 10.5 inch/12.1 inch 24V DC QuickPanel Installation Guide

IC220PBI002 Profibus DP V1 NIU for VersaPoint I/O

IC647DMS005 DataMart 5 PA Connections

IC647ROC010C ROC:Fisher Remote Operations Controller for 50 Units

IC693MDL390 120/240 Vac Isolated Output, 2 Amp (5 Points)

IC756CDV010K-97 DV Draw Development on Compaq True64, Korean, Version 9.7

MSI-PROD-SV Product Management Server Software

PLC-5/1771 System 1785-BCM PLC-5 BACK-UP COMMUNICATIONS MODULE

Distributed I/O 1790-T0B16X LDX I/O, 24VDC, 16 SOURCE OUT EXPANSION, TERM BLK

Communications 1785-TBM THICK-WIRE TRANSCEIVER CABLE KIT, 49.2FT/15M, STD

Operator Interface 2711-NM3 EEPROM CHIP FOR STORING PANELVIEW 1200 CONFIG.

Support 9305-RSVADDCFRR SUPT REINSTATEMENT CONTRACT FOR 9305RSVADDCFR

Support 9324-RLD300ITS SUPT RENEWAL CONTRACT FOR 9324RLD300IT

DeviceNet Products 9355-RSLETENE RSLINX ENTERPRISE

RSI Software Products 9301-2SE3400FRU2 RSVIEW32 RUNTIME 300-32K UPGRADE IN-SUPT (FR)

RSI Software Products 9371-RSWD1U1 UPGRADE: IN-SUPT: RSWIRE DET JIC STDAL TO DES PRF

Motion Control 1326AB-B410G-M2L MOTOR,SERVO,460V,2.7NM,5000RPM,MULTI,IP67

2125 Greyline OS, 4 Line, (20) 5MM Chars, VFD, Quick Connect, NEMA 4

HE693XTADP 9-pin to 25-pin adapter for HE693SNPCBL, HE693CBL222 and 25-pin serial ports

IC677DBM442 Profibus VersaMax IP Modular slave with (8) 24VDC inputs

QPK2D100L2P/S QUICKPANEL MONO 6" LCD WITH EPOXY SEAL

STXPBS925 STXi Profibus with 16 24VDC source (Negative Logic) input and 16 isolated relay output, expandable to 8 additional modules.

20BC3P5A0NYNANC0 PowerFlex 700 AC Drive 20B

20F1AND302AN0NNNNN PowerFlex 753 AC Packaged Drive

22B-D012F104 PowerFlex 40 5.5 kW (7.5 Hp) AC Drive

140DIO33000C Quantum 開關量輸出, 8點, 本安型,CC

284E-FVD2P3Z-10-DRN-DB1-SB-EMI EtherNet Variable Frequency Drive

E3Z-R81 4m 反射式 晶體管輸出 PNP 100Ma 電源DC12-24V

1492-SPM1B300 MCB Supplementary Protector 30 A

直流電源 6EP1336-3BA00 120/230VAC 輸入，24VDC/20A 輸出

6SL32101KE175UF1

1497D-A15-M10-0-N Gen Purpose Transformer

1606-XLSRED80HE XLS Redundancy Module

1769-L36ERM CompactLogix 3 MB Motion Controller

190S-AND2-CB10C Compact Comb Starter W/Ckt-Bkr

194R-LNC8 Terminal Shroud, 4P, 125A

2090-CPBM7DF-16AA03 MP-Series 3m Standard Cable

2090-XXNPY-16S25 Y-Series 25 m Length Power Cable

CBL-OIJR-06-RA Serial cable with right angle connector for Operator Interface Panel connected to an S2K controller. 6 feet

GF-2530R Connecting FlashCable to Sony LH xx (w/RS-232).

IC200UDD120 28 point PLC,(16) 24VDC In, (12) 24VDC Out ESCP(2 at 1.0 amp and 10 at 0.70 amp), 24VDC Power Supply. Battery (IC200ACC403) is required for data retention. Battery not included.

IC646TPD935 35,000 I/O Point Development System

IC647OPMC OPM:Opto 22 Mistic

IC693ALG392CA Conformal Coated Analog Output module, eight channels voltage/current.

IC752DPJ000RR Datapanel J+, 256x64 LCD with EL backlight. Various sizes of text, bi tmaps, bar graphs, real time clock. Includes an integrated keypad for data entry. No touch capability.

IC800VMMCONP003 VersaMotion motor power and brake connector (1 kW and 2 kW models)

SLC/1746 System 1747-PIC CONVERTER RS 232/DH 485

Industrial Computers 6186-M15SSTR VERSAVIEW 15 INCH MONITOR, RESISTIVE TOUCH SCREEN

Application-specific products 1404-M405B-232 MASTER MODULE - PQ 24V POWER SUPPLY 232 COM

Operator Interface 2711-T6C20L1 PV600 COLOR TOUCH, ENET & RS232 PRINT

Support 9301-2SE3100ITR SUPT REINSTATEMENT CONTRACT FOR 93012SE3100IT

Support 9380-RSBAR5000S SUPT RENEWAL CONTRACT FOR 9380RSBAR5000

DeviceNet Products 1734-TB3SQ10 TEN 12-POSITION IP20 SPRING TERNIMAL BASES

RSI Software Products 9301-2SE3200PTE RSVIEW32 RUNTIME 300 (PORTUGUESE)

RSI Software Products 9358-BPCNT30U1R UPGRADE: OUT-SUPT: RSBATCH PC-BASED 03 TO 30

Motion Control MPL-B4520P-RJ22AA MOTOR,SERVO,6.1 NM,5000RPM,RSLVR,460V,7.7KG

Motion Control 2090-SCNP8-0 SERCOS FBR CABL,CONN,HARSH DUTY,JKT,PLASTIC,8.0M

GFK-1885A ViewStation/ControlStation CE II (6") HW User's Guide

IC646MDE700 Logic Developer - PC & View (HRT) 700 Tag Runtime & Development System

MTR-1221-N-D-E-0 Stepping Motor Nema23, Series Wdg

QPI3D200E2P/B 9 inch Monochrome EL/ Blank Label/ 24VDC/ UL/ cUL/ CE/ UL1604

20BC030A3AYNAEC0 PowerFlex 700 AC Drive 30 A at 15 kW 20B

20F11NC015AA0NNNNN PowerFlex 753 AC Packaged Drive

21G1ALC567JN2NNNNN-ND-L1-P3-P11-P14 PowerFlex Air Cooled 755 Packaged Drive

2711P-RFK12 PanelView Plus Accessory

280G-F12D-10B-RRG-CBG ArmorStart 280/1 Starter

C200HW-BI051 擴展機板?可安裝5個I/O單元

1492-PD3C112 255 A Power Distribution Block

中央處理單元 6ES7412-1XF04-0AB0 CPU412-1，144KB，100ns，電源 24VDC， MPI/PROFIBUS-DP 主站接口

變送器 3RS17252FD00

TIA 博途數字化選件 6ES7823-1AA04-0YA5 TIA Portal Multiuser V14

1585J-M8TBJM-15 RJ45 Ethernet Media

1760-USB-GFX PicoGFX USB Programmer Cable

188-K3B100 Miniature Circuit Breaker 10 A

194L-E12-C34 Terminal Cover 3 Pole 12 - 16 A

2090-CPBM4DF-16AF04 MP-Series 4 m Length Pwr and Brake Cable

2090-XXNFMF-S04 Kinetix Drives 4m Standard Cable

BC647OEM0401 OEM Edge Program Renewal - Historian

GC647NXV001 Proficy GlobalCare Complete for Tracker Order Execution Management Web Viewer

IC200MDD842 Mixed 24VDC POS LOG input group 16 point / output 24VDC 0.5 amp with ESCPoutput 16 point.

IC646NMR000 Modbus RTU Communications

IC647M32C M32:Moore MYCRO 320 Independent Computer Interface

IC670MFP100 Micro Field Processor

IC697MDL653 24 Vdc Input, Positive/Negative Logic (32 Points)

IC800SLMCONKITVL connector kit for 3.5 kW to 5 kW S-series servo motors without brake

ControlLogix/1756 System 1751-SL4SP SYNCHLINK FIBER 4-PORT SPLITTER BLOCK

Industrial Computers 6182H-15BEH15D VVCE 1500, KEY/TOUCH, EXT MEM, CNET, DC

Process Control 1757-PFBUPG100 PROFIBUS LIC UPG 100 IOMS

Operator Interface 2711P-ST15B PANELVIEW PLUS 1500 KEY/TOUCH STARTER KIT

Support 9326-AD10APR SUPT REINSTATEMENT CONTRACT FOR 9326AD10APENE

Support 9371-EDBA3S SUPT RENEWAL CONTRACT FOR 9371EDBA3

ControlNet Products 1734-RTBS REPLACEMENT IEC SPRING TERMINAL BLOCK

RSI Software Products 9301-2SE240ESU5R RSVIEW32 WORKS 5K-32K UPGRADE OUT-SUPT (ES)

RSI Software Products 9358-B30UB1R UPGRADE:OUT-SUPT:RSBIZWARE BATCH 30 UNTS TO BUNDLE

Motion Control MPL-A430P-HK24AA MOTOR,SERVO,5.42NM,5000RPM,ENCDR,230V,BRK,8.2KG

Motion Control 2090-UXNFDN-R30 CABLE,ULTRA,NON-FLEX, MOTOR FEEDBACK,N,R/A,30M

CBL-153 Cable. OMRON Host Link Unit C20H (RS-232)

IC610MDL156RR 24Vdc Sink Output, D Connector, with LEDs (16 points)

IC800SLCBVL100 Power/Brake Cable, 3500W and 5000W SL Servo Motors with Brake, 10 Meters

OC647IFGLBLRLYCLNPKM-55 iFIX WebSpace v5.5 Relay Client Pack 10 Users

20AD3P4C3AYNANC0 PowerFlex 70 AC Drive 3.4 A at 2 Hp 20A

20DD014A3EYNACANE PowerFlex 700S AC Drive 20D

20P41AB073RA0NNN PowerFlex DC Drive 230V AC 20 HP

2711-NV4 PanelView Accessory

280-PWRM24A-M2 ArmorConnect 3-PH Power Media drop cable

3G3MV-A4075 NEW 14KVA 18A 7.5KW 3相AC380-460V/50HZ/60HZ

1492-MCAA2H25 Miniature Circuit Breaker, 25 A

1494U-PC2 1494U Long Protective Cover

軟啟動器 3RW44562BC44

工程組態編程軟件 6AV2103-0XA04-0AA5 SIMATIC WinCC 專業版 max. PowerTags V14

1585D-M4UBJM-15 1585D Ethernet Media Patchcord

1756-L63S GuardLogix 8 MB Standard Mem Controller

1797-TPR FlexEx Accessories

194E-E80-1753-6G 80 A 194E Load switch

2090-CFBM6DF-CBAA02 TL-Series 2m Feedback Cable

2090-SCEP8-0 Kinetix 8-8m Fiber Optic Cable